DIY Loudspeaker
Copyright 2026 © Troels Gravesen, Denmark
Page Index Updates Builders Pages For Sale News, 4th May 2026
CLICK IMAGES TO GO TO CONSTRUCTION
Welcome to my website! Below you will find articles on some of the work
done over the last two decades. Building speakers has be on and off for
more than forty years since high school, and with the availability of PC-based measuring equipment
in the Nineties my hobby took another direction, as it became very much
clear, that doing crossovers by calculation and fine-tuning by ear had
its shortcomings.
Over the years my focus has moved from small and inefficient speakers to
larger constructions providing less distortion and increased dynamics,
things that
make reproduced music live and engaging. Below you will find speakers
ranging from 2 to 300 litres volume and I hope you will find inspiration
for your next DIY project or buy one of the kits from Jantzen Audio.
In case you want advice on which speaker to build, please read both "choices"
and "crossovers"
before writing. I shall not recommend any speaker for reasons outlined
in the "choices" file, and please do not ask about the sonic differences between
two speakers. What I hear is unlikely to be what you will hear.
Sorry, but time doesn't allow assisting
in any hypothetical combination of drivers of your own choice, nor
up-grade of newer commercial speakers as well as renovation of vintage speakers not listed below.
Since 2014, all schematics are closed, i.e. crossover
components' values only comes with purchase of the kit. The reason for
this can be
read
here. Crossover schematics cannot be bought
alone.
Should you run into problems with the constructions presented
here, I'll do all I can to assist in successful implementation, but
don't expect daily communication, after all my time i limited. The past
few years (now 2025) we've seen newbies engaging in The Loudspeaker and
similar large and complex systems - and they have run into serious
trouble getting it all working properly. Take a deep breath and honestly
consider your skills in woodworking and crossover layout and wiring.
There may be a LOT to learn. Go through all stages of my
tips
page. If any of the things listed here appears alien, you may have to
start small with a simple 2-way before you engage in the larger and more
complex constructions.
Designing loudspeakers is not necessarily rocket science. Designing loudspeaker drivers is another thing, but picking 2-3 drivers and making a suitable cabinet and crossover is basically a matter of handling fairly simple measuring equipment, simulation software - and experience. Some call the voicing of speakers an art. I don't think so. Voicing a speakers is a matter of taste like adding spices to a stew. Some like it hot, creamy or crunchy - some don't. The ancient Greeks didn't distinguish between art and craftsmanship. Same thing. Something may be art if enough people think it is.
All technical questions, contact: troels.gravesen@hotmail.com
For purchase of kits, contact:
contact@jantzen-audio.com
None of the constructions, illustrations or
information presented here may be used for commercial purposes and
cannot be licensed. Download terms of use here:
The constructions are divided into sections based on the main driver in
the system, e.g. ScanSpeak, SEAS, SBAcoustics, AudioTechnology and
Purifi.
I'm very
fortunate to be have been partly sponsored by these companies and without their generous
support, very little of this would have been possible.
Since 2020 all constructions and crossovers are of my own pocket. Unless
specifically stated, all constructions are based on my own preferences
and I may combine drivers from different manufacturers if I think they
will make good partners.
All underlined text is a link, regardless of font properties.
Regarding frd and zrd files for crossover simulation: I do not provide these from my library and please do not send your own for evaluation.
The common habit of anonymity on discussion forums is sad, I think. Why
should we spend time with nobody in cyberspace? You must be
somebody. Incognito mails are ignored.
If
you have questions or comments, please state your name and the country
you live in to give me an idea of the hifi environment you live in. Feel
sure I need your response to make this website better.
I have a lot of mails and answering takes time and please do not feel neglected if my reply is short. I regard all communication between you and me as personal, so do not post my comments or graphics on discussion forums, websites, etc. without my written consent.
Discovery:
Classic:
Revelator:
Illuminator:
Ellipticor:
FUSION SPEAKERS
Speakers combining various brands:
ScanSpeak, SBAcoustics,
AudioTechnology, Viawave, Peerless, BMS, Faital, 18 SOUND, Purifi.
Constructions based on the 8008-HMQ high-efficiency driver
Subwoofer and bass module
Up-Grade Kits for Vintage Speakers
Should I up-grade my vintage speakers? Read here.
Vintage speaker and high-efficiency stuff
My reference system
Click image or heading to go to:
PAGE INDEX
Recent up-dates
Builders' response
News
Speaker constructions featuring drivers
from:
AudioTechnology
High Efficiency Speakers
JA8008-HMQ High Efficiency constructions
FUSION
Mix of drivers from various manufacturers, ScanSpeak,
Purifi, Peerless, Faital,
BMS, 18 SOUND.
The Jenzen speakers, 3-way transmission
line designs
Up-Grade Kits: JBL L100, Tannoy MG15, YAMAHA NS1000M
Center speakers for surround sound
HYPEX, PAGES on the use of Hypex FUSION plate-amp/DSP modules
Vintage speakers, JBL Tannoy, Wharfedale, Goodmans, etc
Feature articles, tips, ideas, cabinet damping, coils, etc.
FOR SALE, CLICK HERE FOR FURTHER INFO
Ellipticor-84, pick up only!!
Back to Index
RECENT UP-DATES
Back to top
Back
to Index
BOLD = new speaker constructions or significant updates.
13-05-2026:
TEST: VOLT VM527 mid-dome
04-05-2026:
The-Loudspeaker-4
06-04-2026:
Amber-Z-cap C&B cupper foil capacitors for tube amps and bypass
13-02-2026:
ScanSpeak Revelator-44.
28-01-2026:
The-Loudspeaker-1 cabinets now available from EBEL Holztechnik
04-12-2025:
Tona SUTs (MC step-up) for my systems
20-11-2025:
The Loudspeaker-5, 3-way, 95-96 dB
11-09-2025:
My take on making front grills
27-07-2025:
Update on speaker binding posts on Jantzen Audio website
16-07-2023:
More Vinyl Playroom, Charisma-103, Kiseki Agaat and Tona SUT
30-06-2025:
ScanSpeak Illuminator-15
29-06-2025:
Update on Vinyl Playroom, Ortofon MC X40
09-04-2025:
ScanSpeak Ellipticor-28
07-02-2025:
ScanSpeak Illuminator-7R
08-01-2025:
SEAS CA18RLY, New Year Fun Project, free for all
03-12-2024:
SEAS-22, Snell-E/III revival
18-11-2024:
Purifi-6R back in portfolio
18-11-2024:
Viawave GRT-145-4 now again available for The Loudspeaker-1-2
15-11-2024:
ATiRi, AudioTechnology/Viawave back in portfolio
06-11-2024:
Reganism, the Full Monty!
28-10-2024:
Reganism...
24-09-2024:
Faital-10-430
28-08-2024:
Ellipticor-1824
28-08-2024:
Mounting ScanSpeak Ellipticor drivers
02-08-2024:
Faital-12-430, powerful 3-way classic
17-07-2024:
Vinyl playroom
11-06-2024:
Placement of port(s)
16-05-2024:
ScanSpeak Illuminator-71, now with Beryllium dome option
25-04-2024:
ScanSpeak Ekta-TL
19-03-2024:
Test, vintage Snell-E-III
22-02-2024:
ScanSpeak Soundbar
23-01-2024:
The-Loudspeaker-CENTER
19-12-2023:
Faital drivers now at Jantzen Audio. Click for further info.
16-12-2023:
Flat-pack cabs for Ellipticor-84 from EBEL Holztechnik,
Germany
07-12-2023:
ScanSpeak Ellipticor-84, 2023 finale!
07-11-2023:
New Faital bass drivers, 10RS430 and 12RS430, some tests and thoughts.
29-10-2023:
Test ScanSpeak dome tweeter, D3004/602200
26-10-2023:
ScanSpeak Revelator-3WC
24-10-2023:
New
SEAS W22NY003 driver
25-09-2023:
SEAS NEXTEL-2F
16-08-2023:
ScanSpeak Ellipticor-2F8
21-07-2023:
ScanSpeak Ekta-7741
12-06-2023:
ScanSpeak Discovery-18W-mkII
02-05-2023:
ScanSpeak Ellipticor-A50-mkII
02-05-2023:
ScanSpeak Revelator-51
17-04-2023:
Response to ScanSpeak A50
17-04-2023:
Testing SBAcoustic front grills
13-04-2023:
Beryllium version of Discovery-3WC-10
17-03-2023:
ScanSpeak Ellipticor-A50 at AXPONA 2023
06-03-2023:
ScanSpeak, Discovery-3WC-10
10-01-2023:
ScanSpeak, Ellipticor-A50
03-01-2023:
Purifi-Fa
14-06-2026:
Faital-12-430, built by Tomas
07-06-2026:
ScanSpeak Illuminator-71, built by Andrea, Italy
03-05-2026:
ScanSpeak Ekta-7741, built by Jens, Australia
02-05-2026:
The-Loudspeaker-5, built by Theo
26-04-2026:
ScanSpeak Illuminator-CENTER, built by Antonio
19-04-2026:
ScanSpeak, Ekta-7741, built by Vernon
18-04-2026:
SEAS Mini, W15CY001+Hiquphon OW1, built by Andrea
04-04-2026:
SEAS, SEAS-22 - "thin-wall", built by Thomas
03-04-2026:
SBAcoustics, SBA-861-PFCR, built by Jorge
20-03-2026:
Purifi-6R, built by Sam
17-03-2026:
SEAS-NEXTEL-2F, built by Rodney
07-03-2026:
Faital-12-430, built by Patrik
03-03-2026:
SEAS, SEAS-22, built by Marko
26-02-2026:
ScanSpeak, Discovery-18W-mkI, built by Maciej
25-02-2026:
ScanSpeak, Illuminator-71, built by Patryk
24-02-2026:
AudioTechnology ATiRi+, built by George
07-02-2026:
ScanSpeak Ellipticor-A50-mkII, built by Darren, UK
02-02-2026:
SEAS CNO-GRANDE, built by Steven
30-01-2026:
My original ScanSpeak Ellam-FLEX-3W, now by Bram in NL :-)
26-01-2026:
QUATTRO-mkII, built by Jerome, France
24-01-2026:
ScanSpeak Illuminator-7751, built by Antonio
20-01-2026:
SEAS CNO-4, built by Javier
07-01-2026:
Peerless NOMEX-164 mkII and ScanSpeak SUB, built by Stefano
06-01-2026:
SEAS-CURV, built by Marius
06-01-2026:
The-Loudspeaker-5, built by Otso, Finland
18-12-2025:
The-Loudspeaker-CENTER, built by Bill
30-11-2025:
ScanSpeak Ekta-TL, built by Metod
30-11-2025:
Faital-3WC-10, built by Bas
25-11-2025:
ScanSpeak Discovery-MTM, built by Thomas, Germany
23-11-2025:
SBAcoustics SBA-7MD, built by Ebbe, Denmark
18-11-2025:
Ellipticor-1824, The-Loudspeaker-3, Faital-3WC-10 and TL-CENTER, built
by Jonathan
10-11-2025:
Faital-3WC-15, built by Arvydas, Lithuania
01-11-2025:
ScanSpeak Illuminator-71-Be, built by Lasse
27-10-2025:
ScanSpeak Ekta-TL, built by Tommy
16-10-2025:
The-Loudspeaker-3, built by Jack
04-10-2025:
ScanSpeak Illiminator-7R, built by Nick
01-10-2025:
AudioTechnology ATiRi+, built by Noam (with a twist!)
01-10-2025:
Faital-10-430, built by Rob, UK
28-09-2025:
The-Loudspeaker-3, built by Przem
24-09-2025:
ScanSpeak, 12" SUBWOOFER, built by Andrea, Italy
24-09-2025:
ScanSpeak BOOKSHELF, built by Ivan, Slovakia
15-08-2025:
ScanSpeak Discovery-861, built by Andras
03-08-2025:
ScanSpeak Illuminator-71 (TPCD dome), built by Andrew
23-07-2025:
SBAcoustics, SBA-941, built by Rafal
21-07-2025:
SBAcoustics, SBA-10, built by Mats, Sweden
03-07-2025:
ScanSpeak Ekta-25, built by Bernard, Poland
22-06-2025:
ScanSpeak Ellipticor-3, built by Trigger
13-06-2025:
Faital-3WC-12, built by Marc, The Netherlands
30-05-2025:
ScanSpeak Illuminator-7R, built by Robert, UK
28-05-2025:
ScanSpeak Revelator-851, built by Tomas, Slovakia
25-05-2025:
ScanSpeak, Illuminator-7R, built by Yu
20-05-2025:
SBAcoustics, SBA-741 bass module, built by Tom
02-05-2025:
The-Loudspeaker-1, built by Runner
02-05-2025:
ScanSpeak Discovery-4, built by Carl
01-05-2025:
SBAcoustics, SBA61-NAC, built by Ramiro, Argentina
27-04-2025:
SEAS CNO-Grande, built by Frank
26-04-2025:
Faital-10-430, built by Guilhem, France
24-04-2025:
SBAcoustics, SBA-861-PFCR, built by Kari, New Zealand
22-04-2025:
SEAS-22, built by Vidar, Norway
18-04-2025:
The-Loudspeaker-3, built by Mike
12-04-2025:
ScanSpeak Revelator-851, built by Magnus. Update.
05-04-2025:
ScanSpeak Discovery-MTM, built by Bengt, Germany
05-04-2025:
ScanSpeak Revelator-51, built by Judd, US
04-04-2025:
ScanSpeak Discovery-861, built Gianni, Italy
03-04-2025:
SEAS Eekels' Minis, built by Roope
23-03-2025:
ScanSpeak Discovery-861, built by Rafal
19-03-2025:
Faital-3WC-10, built by Keesh, NL
16-02-2025:
ScanSpeak Illuminator-71, built by Lieven, Belgium
03-02-2025:
SEAS CENTER PRESTIGE, built by Tibor
30-01-2025:
Faital-3WC-15, built by Jason
22-12-2024:
Faital-12-430, built by Koen, Belgium
18-12-2024:
OBL-15, built by Søren, Denmark
08-12-2024:
ScanSpeak Ellipticor-A50-II, built by Andrei
03-12-2024:
ScanSpeak, Revelator-51, built by Dominick
26-11-2024:
ScanSpeak Revelator-51, built by Roel
04-11-2024:
SEAS Cyclop inspired speaker built by Serhii, Ukraine
28-10-2024:
Faital-10-430, built by Young, Korea
27-10-2024:
The-Loudspeaker-2, built by Maciej, Poland
27-10-2024:
The Loudspeaker-1, built by Milliau
18-10-2024:
Ekta Grande, built by Bogdan, Romania
10-09-2024:
ScanSpeak Illuminator-71, built by Erik
07-09-2024:
SBAcoustics, SBA-941, built by Rob, NZ
06-09-2024:
TQWT-mkIII, built by Alexandre
06-09-2024:
ScanSpeak Studio-101-mkII, built by Mike
06-09-2024:
Faital-3WC-10, built by Kobus
28-08-2024:
ScanSpeak Discovery-4, built by Petri, Finland
18-07-2024:
SBAcoustics, SBA-761, built by Mike
09-07-2024:
The Loudspeaker-1, built by Torben, Denmark
06-07-2024:
ScanSpeak Illuminator-5, built by Tom, USA
28-06-2024:
ScanSpeak Revelator-66, built by Victor, UK
23-06-2024:
Faital-3WC-10, built by Olivier
20-06-2024:
Faital-3WC-10, built by Robert
19-06-2024:
FUSION-3WC, built by Roman
17-06-2024:
Faital-3WC-15, built by Michael, Ireland
12-06-2024:
ScanSpeak Revelator-851, built by Robin, England
23-05-2024:
ScanSpeak Ellipticor-A50-mkII, built by Novak
21-05-2024:
Peerless NOMEX-164-mkII, built by Christopher
20-05-2024:
Faital-3WC-12, built by Andreas, Germany
18-05-2024:
ScanSpeak Ekta-7741, built by Mike
15-05-2024:
ScanSpeak Discovery-861, built by Tomas, Slovakia
30-04-2024:
SBAcoustics, SBA-3WC, built by Tyler
21-04-2024:
The-Loudspeaker-1, built by Uladzimir
14-04-2024:
Faital-3WC-15, built by Xavier
13-04-2024:
Open Baffle, OBL-15, built by Homer, UK
11-04-2024:
SBAcoustics, SBA-741, built by Tom
09-04-2024:
ScanSpeak Micro-5F/8822-T01, built by Paul
08-04-2024:
ScanSpeak Illuminator-71, built by Ignas
25-03-2024:
ScanSpeak Revelator-3WC, built by Thomas
23-03-2024:
Faital-3WC-10, built by Alain, Australia
13-03-2024:
Purifi-Be, built by Nick
11-03-2024:
Faital-3WC-15, built by Bartosz
03-03-2024:
SEAS-NEXTEL-2F, built by Jason, UK
25-02-2024:
The-Loudspeaker-3, built by Jonathan, Israel
18-02-2024:
The-Loudspeaker-2, built by Ireneusz
03-02-2024:
SEAS CNO-4, built by Andreas, Sweden
02-02-2024:
ScanSpeak Illuminator-71, built by Leo
30-01-2024:
AudioTechnology AT-SW, built by Larry
27-01-2024:
SBAcoustics, FUSION-22, built by Frank
23-01-2024:
ScanSpeak Ekta-7741, built by Mark
17-01-2024:
SBAcoustics, FUSION-22, built by Robert, US
16-01-2024:
The Loudspeaker-1, built by Philippe, Belgium
11-01-2024:
ScanSpeak Discovery-3WC-mkII, built by Rune
04-01-2024:
SBAcoustics, SBA-MTM, built by Stephen
Go to
all builders' response 2008-2023, chronologically
HES, High-Efficiency Speaker Constructions
Read feedback from HES builders here.
Some thoughts here on high-efficiency speakers:
http://www.troelsgravesen.dk/HES.htm
Intro to range of high-efficiency speakers:
http://www.troelsgravesen.dk/HESintro.htm
The-Loudspeaker-1
The-Loudspeaker-2
The-Loudspeaker-3
Speakers based on the JA8008-HMQ high-efficiency driver
JA8008-HMQ driver, the heart of the HES speakers below
TQWT/DTQWT-mkIII, JA8008-HMQ - SEAS T35C002/waveguide
DTQWT 212 mkIII,
JA8008-HMQ+T35C002/waveguide + 2 x Eminence Deltalite II 2512
8008-CENTER mkII, for
the complete 8008 surround set, built around JA8008-HMQ/T35C002 drivers
QUATTRO mKII, 2-way
monitor/standmount from JA8008-HMQ/T35C002 drivers
TQWT/DTQWT mkIII FLAT, for those who want to upgrade the mkI/II speakers
8008-CORNER, speaker for near-wall placement
2016 OBL-15, the successor of OBL-11, now with the new JA8008-HMQ driver
Read here about the MKII versions and some background that may
not be included in the mkIII articles:
TQWT mkII: 2-way
tapered quarter-wave design, JA8008+TW034/waveguide
DTQWT mkII:
3-way double tapered quarter-wave design, JA8008+TW034/waveguide + 2 x
Eminence Deltalite II 2510
JA8008 used in open baffle constructions:
OBL-15, the successor of OBL-11, now with the new JA8008-HMQ driver
OBL-11,
Open Baffle Loudspeaker. My homage to Gilbert A. Briggs' SFB
OB-09, open baffle
construction, JA8008/TW034 and Eminence Deltalite II 2515, 15" bass
driver
OB-07 open
baffle experiments, Supravox 215RTF + JBL LE26/waveguide + Goodmans
Axiom 150 mkII
Background experiments:
Tweaking the
DTQWT, incl. intro to TQWT-mkII and DTQWT-mkII
DTQWT
experiments, JBL LE26/waveguide + Goodmans Axiom 150 mkII, Supravox
215RTF
Amplifiers:
Amplifiers
for TQWT and DTQWT; some general thoughts on suitable amplifiers
DTQWT, 10 or 12
inch. Which should I build?
Back to Index
Click heading or image to go to ScanSpeak constructions' overview
3- to 5-way constructions
Illuminator-4
Illuminator-5
DISCOVERY-4
Jenzen
Illuminator
Ekta Grande
Classic 3-ways stand-mount
2-way floorstanders
Discovery MTM
Bookshelf speakers
ScanSpeak Center Speakers
Illuminator-CENTER
Discovery-CENTER
2-way stand-mount
Studio 101 mkII
Ellipticor-One
Minis
ScanSpeak subwoofer
Other ScanSpeak stuff
Testing D3004/660000 vs D2608/913000.htm
Testing ScanSpeak D2104/712000 3/4" dome tweeter
ScanSpeak Micro.
5F/8422T01, the smallest speaker I've ever made
Test Scan-Speak
5F/8422T01 and 10F/8414G10 full range mini drivers
Test of
ScanSpeak tweeters, D3004/660000 and D2904/710003, D3004/6640 Beryllium
dome and D2908/7140 Beryllium dome
Waveguide for
ScanSpeak D2904/710003 tweeter
ScanSpeak waveguides
Discontinued (Jantzen Audio does not support these kits any more
and you have to source components locally)
Some Kit Instructions can be bought from me. Payment by PayPal to my
account.
MUN17-3W, 28W/4878T00 + 18M/8631T00 + D2908/714000
(Kit Instruction with schematics and parts list can be bought)
Discovery 18W,
18W/8434G00 + R2604/832000 (Kit Instruction with schematics and
parts list can be bought)
Revelator 4R, mini from 15W/4531G00 and R2604/832000
(Kit Instruction with schematics and parts list can be bought
ScanSpeak 3W-Classic - Classic, 21W/8550-00-13M/8640-00-R2604/833000
(Kit Instruction with schematics and parts list can be bought).
ScanSpeak 3W-Classic - Classic, 21W/8550-00-Eton
4-300-25Hex, R2604/833000 (Kit Instruction with schematics and parts
list can be bought)
ScanSpeak 3W-Classic - Classic, 21W/8550-00-Vifa
PL11WH09-08-R2604/833000 (Kit Instruction with schematics and parts
list can be bought)
ScanSpeak Ekta-2D,
fully digital 2-way with Hypex FA122
(Kit Instruction with schematics and parts list can be bought)
Open Kits:
Jensen 1071,
26W/8861T00 + 18W/8531G00 + D2905/990000
Ellam-FLEX, 2-way, 15W/8530K00 + D3004/660000
Ellam FLEX 3W,
3-way from 22W/4851T00, 15W8530K00, D3004/660000, R3004/662000
Illuminator
Monitor, 18WU/8741T00 and D2904/710003
DISCOVERY 12W,
built a small high-quality 4 litre mini
Compact Studio Monitor,
18W/8545-K00 + R2604/832000
Ellam
Discovery 15
SP44, 3-way,
18W/8530-G00 + Accuton C44 + Hiquphon OWI
SP38/13, 18W/8531-G00 +
D3806/8200 + D2010/8513
STUDIO 101,
18W/8542-00 and SEAS 27TFFC tweeter
Back to Index
FUSION speakers, mix of drivers from various manufacturers:
FUSION
(BMS, ScanSpeak/SBAcoustics)
FUSION-BAD (BMS, ScanSpeak/SBAcoustics)
FUSION-3 (BMS, ScanSpeak/SBAcoustics)
Faital-10-430 (Faital/ScanSpeak/SBAcoustic)
Faital 3WC-10 (Faital, ScanSpeak)
Faital-12-430 (Faital/ScanSpeak)
Faital 3WC-12 (Faital/ScanSpeak/SBAcoustics)
Faital 3WC-15 (Faital/18 SOUND/SBAcoustics)
The-Loudspeaker-1
(BMS/18 SOUND/various super-tweeters)
The-Loudspeaker-2 (BMS/18 SOUND/various super-tweeters)
The-Loudspeaker-3 (18 SOUND bass and horn and
Faital midrange)
The-Loudspeaker-4 (ScanSpeak bass and tweeter, 18 SOUND
midrange)
The-Loudspeaker-5 (all 18 SOUND drivers, passive or
semi-active)
Peerless NOMEX-164 mkII
(Peerless/ScanSpeak)
Purifi-Fa (Purifi/SBAcoustics)
Purifi-Be (Purifi/SBAcoustics)
Purifi-6661 (Purifi/SBAcoustics)
Purifi-6R (Purifi/Viawave)
ATELL-3
Replaced by Ellipticor-2F8
ATS-4
HE (ScanSpeak/AudioTechnology/BMS)
Ellipticor-4 (ScanSpeak/18 SOUND/BMS)
Jenzen Accu (Accuton/AudioTechnology)
Jenzen ATS (AudioTechnology/ScanSpeak)
SEAS
Constructions
Click
heading or image to go to SEAS constructions' overview.
4-WAY CONSTRUCTIONS
SEAS
CNO-4, with new W18NX003 and W22NY003 midbass drivers
SEAS NEXT4
speaker construction
3-WAY CONSTRUCTIONS
SEAS NEXTEL-2F, W18NX003 + T29CF002, Faital
10RS350 bass
CNO-GRANDE, 2 x W18NX003 + W12CY003-EC + T29CF002
Jenzen SEAS NEXT
T25 and -T29. The luxury versions of Jenzen SEAS ER
Jenzen SEAS ER, high-end sound from budget drivers
Poor
Man's Strad, CA22RNX+MCA15RCY+T27TFFC
3-Way-Classic-mkII, CA22RNY+MCA12RC+27TFFC
CENTER SPEAKERS
2½-WAY CONSTRUCTIONS 20-35 LITER
SEAS CNO-25-mkII, 2 x W18NX001+T29CF002
2-WAY CONSTRUCTIONS
CNO-mkIII, W18NX001 + T29CF002
MINIS
SEAS CURV, mini two-way from SEAS U16/RCY/P and SEAS 29 TFF/W
SEAS stuff:
http://www.troelsgravesen.dk/Edge-coating.htm
http://www.troelsgravesen.dk/W12CY003.htm
http://www.troelsgravesen.dk/SEAS-W12CY006.htm
http://www.troelsgravesen.dk/SEAS-W18NX003.htm
http://www.troelsgravesen.dk/W22NY003.htm
DISCONTINUED: (Jantzen Audio does not support these kits any more
and you have to source components locally)
Acapella NEXT,
W22NY001+W18NX001+T29CF001
SEAS 5INCH minis,
CA15RLY, W15CY001, W15LY001, 22 TAF/G
CA18RLY/22TAF-G COMPACT
W15CY001 + Hiquphon OWI
Scoperta, mini
TLs, W15LY001 and ScanSpeak D2608/913000
MAYA,
CA18RNX+T25C003
CA18RNX, 2½-way floorstander, 2 x CA18RNX + 27TDC
Eekels' minis,
W12CY003+22TAF/G
Acapella SEas,
W22EX001+W18EX001+T25C003
TJL3W,
W18E001+W12CY001+HIQUPHON OWI download
TJL3W, large
graphics, zip file
Poor Man's
Strad-EXCEL, W22EX001+W15CY001+27TFFC
W15CY001 + NeoCD3
TJL2W, W18E001 +
T25CF001
T14RCY+SS/8513 or Hiquphon OWI
SEAS W17EX001/SS-8513
W11XT, W11CY001
Acapella SE (single pdf file)
Acapella LWJ, Acapella SE and Acapella SEas constructions (pdf)
download
Acapella SE drawings, zip file
Point75i, SEAS
L22RN4X-P + W15CY001 + Expolinear NDRL81
Point75A&B, ScanSpeak 18W/8535+SEAS W15CY001 + Expolinear NDRL81/alt.
NEO3PDR (pdf)
What are the
Jenzen speakers? Read here about the rationales behind the speakers
Also check out how a range of 6" drivers perform on the Jenzen front
panel
Jenzen
Illuminator, 3-way TL design from ScanSpeak W26/8861T00, 18WU/8741-T00
and D3004/660000
Jenzen NEXT,
3-way TL from SEAS W26FX002, W18NX001 and T25C003/T29CF002
Jenzen SEAS
ER, 3-way TL design from SEAS CA26RFX, ER18RNX and T25CF001
Jenzen speakers no longer supported by Jantzen Audio.
Jenzen ATS,
AudioTechnology 10C77/18H52 and ScanSpeak Be dome
Jenzen Accu
mkII, 3 way TL from Audio Technology 10C77-25-10-KAP, Accuton
C173-6-191E and Accuton C30-06-024
Jenzen D mkII, 3 way
TL from Audio Technology 10C77-25-10-KAP, Accuton C173-6-191E and
Jantzen Audio diamond JDT1024
Back to Index
SBAcoustics, SBA-7MD, 3-way floorstander/transmission line with new MD60N mid-dome
SBAcoustics, SBA-861PFCR, low-cost 2½-way floorstander
SBAcoustics Satori, 2½-way, SBA-761, 2½-way floorstander
SBAcoustics Satori, SBA-741, 3-way Classic, stand-mount
Bass module for SBA-741 and other smaller 5-6"+1" stand-mounts
SBAcoustics Satori, SBA-941, 3-Way Classic, stand-mount
SBAcoustics Satori SBA-16-MTM, MW16P-8, TW29RN-B or TW29BN Beryllium dome
SBAcoustics Satori SBA-19, MW19P-8, TW29RN-B or TW29BN Beryllium dome, powerful 2-way
SBAcoustics SBA-10, 3-way floorstander, SB29MRX75-6, Satori MW16P-8 and TW29RN-B or TW29BN Beryllium dome
SBAcoustics SBA-61-MFC, two way stand-mount, SB17MFC25-8 and SB26ADC-C000-4
SBAcoustics SBA-61-NAC, two-way stand-mount, SB17NAC35-4 and SB26ADC-C000-4
SBAcoustics 3-Way Classic, SB23NRXS45-8 + SB12MNRX2-25-4 + SB29RDAC-C000-4
Testing SBAcoustics Be-dome tweeter, the TW29BN
Testing three SBAcoustics dome tweeters, SB29RDC-000-4, SB26ADC-C000-4 and Satori TW29RN-B
Discontinued:
SBAcoustics SBA-61-NRXC, two-way stand-mount, SB17NRXC35-8 and SB26ADC-C000-4
Now open kit.
Back to Index
CENTER
SPEAKERS FOR SURROUND SOUND
TL-CENTER, center speaker for TL-1-2-3 and Faital-15
ScanSpeak DISCOVERY-CENTER
SEAS-CENTER-PRESTIGE
SEAS-CENTER-EXCEL
8008-CENTER mkII, for the complete
8008 surround set, built around JA8008-HMQ/SEAS T35C002
Click heading or image to go to Audio
Technology constructions' overview
ATS4-HE, high-efficiency version of ATS-4. Active DSP
bass section
ATS-4,
AudioTechnology, ScanSpeak and Jantzen Audio
AudioTechnology 3-Way Classic
Jenzen ATS, 10C77
bass, special 18H52 mid and ScanSpeak Be dome
PRELUDE, 10C77, 15H52 mid, ScanSpeak 9900 tweeter Discontinued at Jantzen Audio
AT-SW, 18H52 midbass and SWANS planar tweeter Discontinued at Jantzen Audio
Test:
AudioTechnology 10C77
sandwich cone bass driver. Pre-study for new 3-W project
OBL-15, the successor of OBL-11, now with the new JA8008-HMQ driver
OBL-11, Open Baffle Loudspeaker. My homage to Gilbert A. Briggs' SFB,
discontinued.
OBL-9, 2009 open baffle
construction with JA8008/TW034 and Eminence Deltalite II 2515, 15" bass
driver, discontinued.
OBL-7, Goodmans
Axiom 150 mkII + Supravox 215RTF64 + LE26 dipole panel, OBL
experiments.
ScanSpeak
subwoofer 26W/4558T00-26W/0-00-00, 30W/4558T00-30W/0-00-00 and Hypex FA251/FA501
Hypex FUSION pages for the various constructions
where Hypex
plate-amp/DSP
modules are used.
Hypex FUSION FA501:
The-Loudspeaker-1
The-Loudspeaker-2
The-Loudspeaker-3
The-Loudspeaker-4
The-Loudspeaker-5
Ellipticor-28
Ellipticor-3
MUN-17
ScanSpeak Subwoofer, 12"
SEAS CNO-4
Hypex FUSION FA252
Ellipticor-4
ATS4-HE
FUSION-3
Hypex
FUSION FA251
FUSION-BAD
The Loudspeaker-3
SBA-741 + bass module
ScanSpeak
subwoofer 10"
General instruction on Hypex modules:
http://www.troelsgravesen.dk/FA251.htm
http://www.troelsgravesen.dk/FA501.htm
Downloads:
Go to page with all Hypex files
here (except Ekta
2D)
All Hypex related pages (for my own recollection):
Use a Hypex FA251 or FA501 as a power amp for bi-amping
http://www.troelsgravesen.dk/The-Loudspeaker-III.htm
http://www.troelsgravesen.dk/FUSION-BI-AMP-DSP.htm
http://www.troelsgravesen.dk/FUSION-3.htm
http://www.troelsgravesen.dk/Hypex-FUSION_FA252.htm
http://www.troelsgravesen.dk/ATS4-HE_Ill-4_FA252.htm
http://www.troelsgravesen.dk/FUSION-FA122.htm
http://www.troelsgravesen.dk/Hypex-PSC2.400.htm
(plate amp no longer available)
Back to Index
Up-Grade Kits For Vintage Speakers
B&W 802s3, better crossover components and wiring
Should I up-grade my vintage speakers? Read here.
Discontinued as kits from Jantzen Audio, source components locally.
Dali800 renovation, new tweeter and crossover
Click heading or
image to go to vintage intro
JBL, James B. Lancing
JBL
L112 Up-Grade Kit
JBL L100 Century
Up-Grade Kit
JBL L100
Recreation, new aperiodic cabinet
Read L100
upgraders' response to kit
JBL LE20 and LE25
tweeters
JBL
LE26 tweeters
JBL
L26
JBL
L26-3way
TANNOY
Part 1: Tannoy 15"
MG
Part
2: Tannoy MG15 Upgrade Filter
Part 3: Tannoy
MG15 Crossover Problem
YAMAHA
WHARFEDALE
Mail exchange with former Wharfedale employee
Wharfedale
1962 brochures
Wharfedale SFB, pics and comments from owners
Wharfedale
Super 8 RS/DD
Wharfedale Super 3 tweeters
Wharfedale Super 8/FS-AL & North England M8, only pics
Vifa
None of the midbass
drivers here available, nor any replacements!
PL14WJ-09-08/ScanSpeak R2604/832000, 2-way 11.5 liter bookshelf mini, or 25 liter
d'Appolito, can be used for center speaker
C17WH d'Appolito: C17-I,
C17-II,
C17-III,
C17-mk4. C17
drivers very hard to find
C20WH-07-08 + Monacor
DT300/waveguide. C20 drivers very hard to find
High Efficiency
Speakers and vintage stuff
High Efficiency Speakers,
intro and experiments
Supravox
full-range experiments in DTQWT cabs
Supravox
215GMF tweaking for better performance
Müll oder gut für ein Schlechtwetterprojekt?
Vintage Isophon P25A
Vintage ScanSpeak.
W21-3804-P2A and D3804 drivers
German SABA
greencones, pics, links and some modelling
1955 Karlson Speaker Brochure
Sonab OA5 mkII
speakers, Stig Carlsson's omnidirectional speaker from the Seventies
Test, vintage Snell-E-III
Spendor BC1
Philips 9710 Part
I-II-III
Philips
9710 disassembling
Philips AD-0160-T8, world's worst dome tweeter?
Blackcones,
vintage SEAS 21 TV-G and SEAS 9 TV-LG and resonant boxes
Clarion by SEAS, a
1978 classic 3-way from SEAS 25 F-WBX/DD, 11FM (H130) and 1" dome (H107)
SEAS kit 503, the
big SEAS 3-way of the Seventies
SEAS KIT brochure
SEAS KIT
303 crossover
Download
SEAS brochure (Norwegian) on kits 223, 253, 403, 603 and Disco-47
Goodmans
Axiom 150 mkII
Goodmans Axiom 150 mkII + Supravox 215RTF64 + LE26 dipole panel
(=OB7 article)
Dali800 renovation, new tweeter and crossover
Loudspeakers in general/FAQ/tips/ideas, etc.
CAPACITORS
Super caps, what
are they and why are they so expensive?
Jantzen Audio, Alumen-Z, test
Jantzen Audio, Amber-Z, test
Response to upgrade from standard PP caps to super-caps
Description of capacitor sound found on the web
Miscellaneous
What it takes to
make a crossover, - please read before asking for a crossover for your
drivers!!
Choices, How to pick
the right diy speaker project. Size matters. Please read before writing!
Placement of port(s)
My
measuring equipment, books and articles useful for getting started in
loudspeaker building
High-pass filter for power amps
Passive to active? Why not so easy.
Time-alignment
of drivers. How to determine dZ
Inverted polarity, what is it?
Find the polarity of your driver
Calculation of box volume and ports. Can we calculate box volume at all?
Vent tuning,
calculation of vent length
Tips & Ideas, Glue
for crossovers, solder tag strips, flaring plastic vents, damping
materials, etc.
Edge-coating of drivers
Edge-coating and linear distortion, prelude to CNO-GRANDE construction
Definition of frequency ranges
Bi-amping, what is it? Some hints and tips
Room-gain, a case study
Measuring inductance of low-DCR coils, like C-coil
Use a Hypex FA251 or FA501 as a power amp for bi-amping
Inverted polarity, what is it? I'm afraid we need to spend a little time
here.
Room-gain, a case study
Beaming. What is it?
Cabinet
damping, please check this before writing on cabinet damping
Why it's not so easy to
make a small mini into a 3-way
The importance of
chamfering driver holes. A small study
How flat is flat?
Does a flat frequency response matter?
Why my crossover
layout may differ from actual schematics. A very common question
Room
Acoustics. Thoughts from Speakers' Corner with a few added comments
Electronic crossovers, pros and cons
How female
vocals can make your hair turn grey - and can low-order filters do
something about it?
Speaker cables and
interconnects
Power handling
of loudspeaker systems
Large domes, part
I. Test of SEAS T35C002, Chario Sonnet, modified Audax TW034, Ciare
MT320 and Accuton C30-6-024 domes
Waveguide for
ScanSpeak D2904/710003 tweeter
More on
waveguides for ScanSpeak tweeters
Eight + one: Can we
make a 2-way from and 8" driver + 1" dome tweeter?
Wide Baffles,
introduction, Stradivari, how does wide baffles impact sound
reproduction
Study on
stepped baffles with little impact on tweeter performance
Make your own
non-inductive graphite resistors!
Tweeter
measurements
My Panasonic TV,
better sound on a weekend
Choosing the
right point of crossover
What is an acoustic vent, aperiodic tuning, Variovent
Definition
of frequency ranges
The importance of
wiring crossovers correctly
ScanSpeak
Classic 9500, 9700 and
9900 tweeters, why they are not interchangeable
Shipping
speaker drivers
Fountek ribbons
Fountek JP3 ribbon replacement, pdf file.
Links to other sites:
Want to hear what your
cabinet panels sound like?
TEST: VOLT VM527 mid-dome
Test, vintage Snell-E-III
Testing PA midrange-drivers for hifi
Test ScanSpeak dome tweeter, D3004/602200
Ortofon T5000 SUT
Thöress EHT Integrated amplifier. Can you handle the truth?
QUAD ESL-63
Test Audio Technica ART1000 cartridge
Testing ScanSpeak D2104/712000 3/4" dome tweeter
Testing new Jantzen
Audio AMBER-Z-CAP
Testing SBAcoustics SB29BAC-C000-4 Be dome
Testing EAR Acute Classic CD-player/DAC
Testing new ScanSpeak Ellipticor 21WE/4542T00 midbass driver
Testing BlieSMa T34B-4 Beryllium dome
Testing new
T34A-4 34 mm dome tweeter from BlieSMa
Testing ribbon
tweeter, Viawave GRT-145W-8.htm
Testing ribbon tweeter, Viawave GRT-145-4
LCR RIAA shoot-out, EAR-912 vs vdh The Grail vs Valab LCR-1
Testing EAR 912 preamplifier with phono-stage
Testing Alumen Z-Caps from Jantzen Audio, a new foil capacitor
Testing Audio-gd pre-amp/headphone amplifier NFB-1AMP
Test ATC SM75-150 midrange dome
Test of ScanSpeak D3004/604010 Be domes
Test
of two ScanSpeak ring-radiators, R3004/662000 and R3004/602010
SAC
Thailand GlowMaster KT 88 fully balanced power amp
Test of van den Hul The
Grail phono stage
Large domes, Test of SEAS T35C002, Chario Sonnet, modified Audax TW034, Ciare
MT320 and Accuton C30-6-024 domes
ScanSpeak tweeters, D3004/660000 and D2904/710003, D3004/6640 Beryllium
dome and D2908/7140 Beryllium dome
Test of
DiyHiFiSupply EZ line stage
Test of MANGER MSW
transducers
Norwegian Wood, review of MAE1, Single Ended Tetrode Amplifier Kit from
Norway
Review of
vintage Snell A3i loudspeaker
Chario
Academy Sonnet speaker
Jungson JA88D-09, 2 x
80 watt class A solid state amp - or at least some of these watts in
class A ...
Jungson
Duro power amp
Garrard 401/LINN - Thorens TD124 mkII/Jelko shootout!
Test of Lowther EX3
Kuzma StabiR turntable, Kuzma 4Point tonearm + Ortofon Anna D cartridge
Cartridges:
Ortofon Anna D
Ortofon Windfeld Ti
Ortofon Cadenza Black
Ortofon 2M Black LVB
My Sonic Lab, MSL Eminent EX
Tona
SUTs for my systems
Also see
Vinyl PLayroom and
Reganism
Yoshino EAR Acute Classic CD-player/DAC
Yoshino EAR-912, pre-amplifier, line-stage/phono stage
2 x Yoshino EAR-861, 64 wpc bridged power amplifiers
Parasound A21+ power amp
Speakers:
WORKSHOP SYSTEM
Kuzma Stabi R with 4Point9 and 4P (11) tonearms + MSL Eminent EX cartridge
Rega P8/RB880, various cartridges
Yoshino EAR-868PL Phono/Line Stage Preamplifier
Yoshino EAR-861, 32 wpc power amplifier
Hypex Ucd400,
400 wpc digital
power amp
(for bi-amping when needed)
For most larger speakers I use bi-amping,
Hypex Ucd400 or
Hypex FA501 for the bass and
EAR-861 for mid-tweeter. Go to bi-amping
here to see what bi-amping looks like.
Bi-amping means you have a line-stage, a
pre-amplifier, driving two power amplifiers, which each runs either bass
or mid-tweeter. This requires the crossover is separated in bass section
and e.g. mid-tweeter section.
Bi-wiring means you have the same amplifier connected to bass
and mid-tweeter with separate speaker cables. It also requires the
crossover to be separated in sections for bass and mid+tweeter.
Miscellaneous
High-pass filter for power amps
Speaker cables and
interconnects
A few formerly owned components:
van den Hul, The
Grail phono stage
Ortofon ST-80 SE, SUT
The Vessel B3SS
cartridge
Denon DP67L
Shanling 2.1
CD player
QUAD-2812 (I didn't have the
space..missed!)
Yoshino EAR-869, integrated/power-amp
SAC
GlowMaster KT88 PP, fully balanced power amp
Jungson JA88D-09, 2 x 80 watt class A solid state amp
Maglev
turntable, SME 309 GD tonearm, My Sonic Lab Eminent EX cartridge
Shanling
CD-T80 CD player
DAC:
Musical Fidelity DAC M1a
6N6P line stage with
output transformer
2017, renovating two Lenco L75 decks
Lenco L78/Moerch DP6
9" Precision tonearm, vdh Canary cartridge
Lenco L75 + Moerch 12" tonearm, vdh Colibri cartridge
Lenco L75, Jelko 12" tonearm
van den Hul
Canary cartridge
van den
Hul Colibri cartridge
Project RPM4 turntable, rebuild
Phono stage based on Transcendent RIAA schematics
Jungson Hedo/Duro power
amplifier, the power amp section of the Jungson JA88D-09
Einstein The Amp
Garrard 401
turntable/Jelko 750D
300B, 8 wpc SET integrated amplifier
Audio Mirror,
Vladimir Bazelkov's 6AS7 PSE, 20 wpc mono blocks, rebuilt to 6C33 tubes
Thorens TD124
mkII/Jelko
Transcendent Grounded Grid line stage
Transcendent
Phono Stage
Audio Research SP16L
Copland CTA 505
Numerous LCAudio
power amplifiers
DACT line stage
Numerous home-made valve line stage
amplifiers
Luxman MQ70 (EL34) power amplifier
Numerous
Erno Borbely MosFet power
amplifiers
Danish High Fidelity magazine preamplifiers, MC, phono and line stages
Click logos to go to websites
Crossover components found on this website are sponsored by Jantzen Audio. Jantzen Audio has the most extensive range of baked coils available, supplemented by a wide range of audio grade capacitors. In addition to this a wide selection of components for speaker building.
Complete
crossover kits for the shown constructions can be ordered at:
contact@jantzen-audio.com.
For SEAS, Faital, ScanSpeak, SBA, Purifi and some AudioTechnology constructions, this can include drivers as well.
I'm particularly grateful to Jantzen Audio for taking the financial risk
of launching the
JA8008
and
JA8008-HMQ drivers. Without their support these drivers would never
have been made.
Some of the drivers used in the constructions were
sponsored by Jantzen Audio (SEAS
drivers), ScanSpeak,
AudioTechnology
and SBAcoustics.
Thanks to those who made this possible! Without your support only a few
constructions would have made these pages.
None of the constructions shown at my website were suggested by any of my sponsors (Except for MUN-17, Ellipticor-1 and Ellipticor-A50) and I'm not financially affiliated with any of my sponsors. For questions regarding the constructions on this site, please contact me at: troels.gravesen@hotmail.com