Updates 2005-2016                                                       Go to builders' response

21-05-2016: SBAcoustics SBA-10, 3-way construction from 10" bass driver and Satori mid and tweeter
14-05-2016: Munich High-End Show 2016, some impressions.
11-05-2016: Testing Alumen Z-Caps from Jantzen Audio, a new foil capacitor
09-04-2016: SBAcoustics 61-NRXC, two-way stand-mount
09-04-2016: Update on SBAcoustic tweeter measurements, now with the Satori TW29RN-B
11-03-2016: SBAcoustics 61-MFC, two-way stand-mount
06-03-2016: My Panasonic TV, better sound on a weekend
13-02-2016: SBAcoustics 61-NAC, two-way stand-mount
13-02-2016: Up-date, OBL-15, alternative Faital bass driver
31-01-2016: Beaming, what is it?
12-01-2016: SBAcoustics 3-Way Classic
06-01-2016: Subwoofer experiments, part II, now with measurements

27-12-2015: Update to AudioTechnology 3-Way Classic: Using the Illuminator D3004/604010 Be dome
26-12-2015: Update to Illuminator-5 construction: Using the Illuminator D3004/604010 Be dome
25-12-2015: Testing two SBAcoustics dome tweeters, the SB29RDC-000-4 and SV26ADC-C000-4
06-12-2015: Subwoofer experiments, Part 1,  ScanSpeak 26W/4558T00, Hypex DS 4.0 plate amp
22-11-2015: Update to Discovery W12 construction, now with the new Be dome, D3004/604010
22-11-2015: OBL-15, the successor of OBL-11, now with the new JA8008-HMQ driver
12-11-2015: Test ScanSpeak D3004/604010 Be domes
24-08-2015: AudioTechnology 3-Way Classic
19-07-2015: Test of two ScanSpeak ring-radiators, R3004/662000 and R3004/602010
09-07-2015: ILLUMINATOR-5, all the best from ScanSpeak
26-04-2015:
ScanSpeak Revelator 4R, mini from 15W/4531G00 and R2604/832000

02-04-2015: DISCOVERY W12, build a small 4 litre high-quality mini
26-03-2015: CENTER-641 Center Speakers from SEAS Prestige and EXCEL driver
22-02-2015: DISCOVERY-4, make an affordable high-end speaker from ScanSpeak drivers
20-02-2015: How flat is flat? Does a flat frequency response matter?
07-02-2015: Restoring two old Lenco turntables, L75 and L78. What my cell phone captured during the many hours of work.

28-12-2014: Quite a few updates on tips and tricks
07-12-2014:
Update to QUATTRO speaker with new JA8008-HMQ driver
28-11-2014: Ellam Discovery 15, an amazing 5+1 mini from affordable drivers
22-11-2014: 8008-CENTER mkII ready. Center surround speaker for TQWT and DTQWT
28-10-2014: New TQWT mkIII, DTQWT mkIII and DTQWT-212 mkIII constructions
20-10-2014: New JA8008-HMQ driver for TQWT and DTQWT constructions
19-10-2014: Ellam-9800 mkII. It's been almost ten years since the first version!
24-08-2014: My Turntables. Why I listen to vinyl records
03-08-2014: SEAS 3-Way-Classic-mkII, it had to come, higher efficiency, better crossover
15-06-2014: ScanSpeak 3-Way Classic, a lot of excellent sound for modest investment
11-04-2014: SEAS NEXT4 speaker construction. Four drivers and the best SEAS construction I've ever made.
21-03-2014: Test of SEAS C18EN001 coax driver. Have high expectation from this driver in future constructions.
15-02-2014: Update on Tips & Tricks - and for those who haven't seen this page before.
10-02-2014: Room Acoustics. Thoughts from Speakers' Corner with a few added comments.
01-02-2014: Discovery W18, 2-way ScanSpeak from affordable drivers. Experience four different crossovers and two different front panel options.

25-11-2013: ScanSpeak Micro. 5F/8422T01, the smallest speaker I've ever made
02-11-2013: ATS-4, my most ambitious project so far. The best from AudioTechnology, ScanSpeak and Jantzen Audio
02-11-2013: Test of ScanSpeak mini full range drivers, 5F/8422T01 and 10F/8414G10
21-09-2013: Test of ScanSpeak D2908/714000 Beryllium dome.
14-06-2013: Ellam FLEX 3W, the mini-Jenzen from ScanSpeak 22W/4551T00, 15W/8530K00, D3004/660000 and three other tweeters.
30-05-2013: Ellam FLEX, two-way mini from ScanSpeak 15W/8530K00 and four tweeter options.
28-05-2013: TQWT/DTQWT-10/DTQWT-12 T35 options. The SEAS T35C002 dome adapted to the most popular constructions.
04-04-2013: Measurements of SEAS T35C002 large dome. Added to Large Tweeter Domes' file.
25-03-2013: Test of van den Hul  The Grail phono stage.
13-03-2013: Why my crossover layout may differ from actual schematics. A very common question.
08-03-2013: Electronic crossovers, pros and cons.
22-02-2013: Up-dated Ekta Grande file. New cabinet drawings, crossover layout, updated parts' list.
10-02-2013: Jenzen ATS, AudioTechnology 10C77/18H52 and ScanSpeak Be dome. The most extensive cabinet work ever.
27-01-2013: Power handling of loudspeaker systems.
26-01-2013: Re-building a ProJect RPM4 turntable. For sale.
26-01-2013: Up-date in Lenko L75 turntable. Two top-plates spray lacquered and friend's L75 renovated with new plinth.

 

23-11-2012: Update on JUNGSON/HEDO/DURO power amps. Expert looking at schematics and calc. actual class A operation
09-11-2012: DTQWT, 10 or 12 inch. Which should I build?
23-10-2012:
24 bit high-res
18-10-2012:
Jenzen Accu mkII, use Jenzen-D front panel design with minor changes to the tweeter crossover
06-10-2012:
SEAS CURV, mini two-way from SEAS U16/RCY/P and SEAS 29 TFF/W
11-09-2012:
What are the Jenzen speakers? Read here about the rationales behind the speakers
20-08-2012:
Jenzen D mkII. I'm happy having these diamonds running again. New front layout and a few x-over mods
08-08-2012:
Restoring/modernising a Lenco L75 turntable. Lenco L75, Jelko SA750LB, Dynavector XX2 mkII
20-06-2012:
Illumina-66, two-way floorstander from ScanSpeak 18WU/4741T00 and D3004/660000 or R3004/662000
20-05-2012;
Super caps. What are they and why are they so costly?
17-05-2012:
Jenzen Illuminator, 3-way TL design from ScanSpeak W26/8861T00, 18WU/8741-T00 and D3004/660000
09-05-2012:
Jungson DURO power amp added to my stock gear
28-03-2012:
More on waveguides for ScanSpeak tweeters
24-02-2012:
Test of ScanSpeak tweeters, D3004/660000 and D2904/710003, updated with D3004/6640 Beryllium dome
15-02-2012:
Jenzen Diamonds, 3-way TL from AudioTechnology 10C77-25-10-KAP, Accuton C176-6-191E and Jantzen JDT1024 diamond tweeter.
02-02-2012:
ScanSpeak Illuminator. Twenty liter stand-mount from 18WU/8741T00 and D2904/710003 - or make a 30L floorstander
27-01-2012:
Test of DiyHiFiSupply EZ line stage
27-01-2012:
Waveguide for ScanSpeak D2904/710003 tweeter
27-01-2012: Tweak #7 for DTQWT, D2904/710003 with waveguide

 

30-12-2011: Test of ScanSpeak tweeters, D3004/660000 and D2904/710003
27-12-2011:
Eight plus One, Christmas holiday experiments on a powerful 2-way from 8" bass/1" dome with a simple crossover at 1.5 kHz.
12-12-2011:
My speaker cables and interconnects (by request)
05-12-2011:
Jenzen Accu
30-10-2011:
Test of MANGER MSW transducers.
28-10-2011:
Tweaking SWANS RT2H-A planar tweeter for better performance
25-10-2011:
Updated file on Tannoy MG15 crossover kits
24-10-2011:
JBL L100 Up-Grade Kit now available in four grades.
12-10-2011:
Jenzen SEAS NEXT T25 and -T29. The luxury versions of Jenzen SEAS ER
07-09-2011:
Jenzen SEAS ER and CA constructions. Making high-end sound from budget drivers
26-08-2011:
YAMAHA NS1000M Up-Grade Kit
11-08-2011:
Accuton C30-6-024 tweeter measurements added to large dome tweeter article
24-06-2011:
8008-CENTER, the missing link to a complete surround set, built around JA8008/TW034 drivers
06-04-2011: Review of vintage Snell A3i loudspeaker
23-01-2011:
Re-building my Audio Mirror 6AS7 mono blocks for 6C33 tubes
03-01-2011:
Blackcones, vintage SEAS 21 TV-G and SEAS 9 TV-LG, my Christmas break fun project and final chapter on resonant boxes

 

18-12-2010: OBL-11, Open Baffle Loudspeaker. My homage to Gilbert A. Briggs' SFB.
07-11-2010:
Final chapter on vintage German greencones
07-11-2010:
Building an all Russian tube phono stage based on Transcendent schematics
16-10-2010:
Russian 6N6P tubes for my WOT linestage
26-09-2010: Tannoy
Monitor Gold MG15 again. Articles on Upgrade Crossover, The MG15 Problem and Updated 2005 article.
18-09-2010:
Up-date on "Amps for DTQWT" file. FAQs on bi-amping plus/minus electronic crossovers
28-08-2010:
Tweaking the DTQWT, incl. intro to TQWT-mkII and DTQWT-mkII
16-08-2010:
Modifying Audax TW034XO-P47N dome
11-08-2010:
QUATTRO, 2-way from JA8008/TW034 IN 40 liter vented standmount
18-07-2010:
Large tweeter domes, part I. Chario Sonnet dome, Audax TW034, Ciare MT320, Ciare PT383
01-06-2010:
Test of Chario Academy Sonnet speaker from a diy'ers perspective
11-05-2010:
PRELUDE, 3-way from AudioTechnology 10C77 bass and 15H52 mid + ScanSpeak 9900 tweeter
24-04-2010:
2½-way floorstander from SEAS CA18RNX + SEAS 27TDC
24-04-2010:
Vintage, German SABA greencones, pics, links and some modelling
06-04-2010:
2½-way floorstander from Peerless NOMEX 164 (830875) and ScanSpeak D2608/9130
18-02-2010:
Study on stepped baffles with little impact on tweeter performance
11-01-2010:
Siri's Killer Note; how female vocals can make your hair turn grey (- if it wasn't already)
03-01-2010:
Some thoughts on amps for TQWT and DTQWT speakers

26-12-2009: New workshop amplifier: JungSon JA88D-09.
18-12-2009:
SP98-09, new crossover and cabinet for ScanSpeak 18W/8531G00 and D2904/9800 tweeter.
05-12-2009:
Christmas Month Special: Make your own non-inductive graphite resistors!
01-12-2009:
The importance of chamfering driver holes. A small study.
21-11-2009:
Calculation of box volume and ports. Can we calculate box volume at all?
05-11-2009:
WWDT, world's worst dome tweeter, PHILIPS AD-0160-T8.
01-11-2009:
10C77 Audio Technology sandwich cone bass drivers under test.
01-11-2009:
Update, Garrard 401/Thorens TD124 shootout.
29-10-2009:
Vintage ScanSpeak. W21-3804-P2A and D3804 drivers.
09-10-2009:
Ellam d'Appolito from ScanSpeak 15W8530G00+Vifa XT25TG-30-04.
08-10-2009:
AT-SW: 2-way compact BR from AT 18H52 midbass and modified SWANS planar tweeter
19-09-2009:
Why it's not so easy to make a small mini into a 3-way. Based on numerous mails.
03-08-2009:
5687 line stage finally finished! Or is it? Will it be a 7119 line stage with grid battery bias?
27-07-2009:
Vintage Sonab OA5 mkII speakers, the first omnidirectional speaker on this website.
07-07-2009:
Garrard 401/LINN - Thorens TD124 mkII/Jelko shootout!
04-07-2009:
STUDIO 101, 13 liter stand-mount speaker from SS 18W/8542-00 + SEAS 27TFFC
14-06-2009:
Jensen 1071, big 3-way from SS 26W/8861T00 + 18W/8531-G00 + D2905/9900.
25-05-2009:
Vintage SEAS 3-way from 1978. "Clarion by SEAS, 70120"
15-05-2009:
OB9, 2009 open baffle set-up. 15" bass driver and electronic crossovers!
14-05-2009:
Mark21, 2 x SS 21/8554-00 + 15M/4531-K00 + XT25TG, built by Mark/Denmark.
13-04-2009:
Center speaker from Peerless HDS 831882 + Vifa XT25TG
22-03-2009:
Jazzman, 3-way ScanSpeak with 22W/8857T00 + 15W/8530-K00 + Vifa XT25TG
16-03-2009:
Ellam-25, Ellam XT 2½-way construction, compact floorstander
20-02-2009:
CNO-25, 2½-way CNO. 36 liter floorstander.
15-02-2009:
Modification of my 300B SET amp. Valve expert gives advice, but is it audible?
12-02-2009:
MAYA, SEAS CA18RNX + T25C003, 24 liter floorstander.
31-01-2009:
SEAS TOK, 24 liter floorstander or bookshelf, CA18RNX+T29CF002 (!)
29-01-2009:
CNO-T25, CNO construction with T25C003 tweeter
29-01-2009:
CNO mkII, brush-up on a popular floorstander.
25-01-2009:
SP44, SS 18W/8531G00 + Accuton C244-8 + HIQUPHON OWI
18-01-2009:
Peerless mini, HDS134-PPB (830860) + DX25TG05-04 or XT25TG30-04
01-01-2009:
PL14-d'Appolito added to PL14-COMPACT version

30-12-2008: SEAS CA18RLY + 22TAF-G COMPACT 16 liter monitor (or 24 liter floorstander)
28-12-2008:
How to choose the right first-time diy speaker project. Some general advice.
27-12-2008:
Vifa PL14WJ09-08 + XT25TG30-04, 11.5 liter mini
22-12-2008:
Supravox full-range experiments in DTQWT cabs.
08-12-2008:
Response on JBL L100 Century Upgrade Kit
21-11-2008:
More 10" bass drivers tested for DTQWT.
10-11-2008:
Vintage 16 ohms, 12" bass drivers suitable for DTQWT
22-10-2008:
The Cyclop; big 10+5+1 inch 3-way floorstander from SEAS Nextel drivers.
30-09-2008:
300B SET integrated amplifier project; comparing coupling caps.
15-09-2008:
Mail exchange with former Wharfedale employee on Super 8/RS/DD and other things.
23-08-2008:
DTQWT - the best - and biggest - speaker I've ever made.
19-07-2008:
Compact Studio Monitor, ScanSpeak 18W/8545-00+Vifa XT25TG-30-04
19-07-2008:
Compact Studio Monitor, ScanSpeak 18W/8545-K00+Vifa XT25TG-30-04
19-07-2008:
Compact Studio Monitor, ScanSpeak 18W/8545-nn+ XT25TG-30-04, intro
22-06-2008:
Wharfedale 1962 brochures, thanks to Spiros Agathagelidis/Sweden.
14-06-2008:
Scoperta, mini TL with SEAS W15LY001 + Peerless HDS tweeter
12-06-2008:
SP38/13 as HTML file.
07-06-2008:
Test of Lowther EX3.
30-04-2008:
Minor up-date on cabinet damping.
27-04-2008:
Renovation of Dali 800 speakers.
24-03-2008:
Vintage JBL L100 recreation, new aperiodic cabinet.
01-03-2008:
ATR25: 2½-way TL from AudioTechnology and Raidho drivers, true high-end.
10-02-2008:
Tips on tweeter measurements, microphone set-up, etc.
16-01-2008:
Update on placement of coils in crossovers. Impact on inductivity from aluminium.

24-12-2007: Acapella NEXT, the best Acapella? SEAS W22NY001 + W18NX001 + T29CF001
11-12-2007:
Three mini-monitors from SEAS W15CY001, W15LY001 and CA15RLY.
10-12-2007:
Cabinet damping, preliminary report.
10-12-2007:
Shipping drivers (I'm fed up with poorly packed drivers!)
06-11-2007:
JA8008/TW034, high-efficiency 2-way in TQWT design.
06-11-2007:
High-End Kit for Beginners.
06-11-2007:
Three speaker kits for Jantzen Audio, 2-ways and d'Appolito.
05-10-2007:
Eekels minis, replacement for the W11XT. SEAS W12CY003 Nextel midbass and SEAS 22TAF/G tweeter.
30-09-2007:
Ekta-Grande: Jesper has been working again and the Ekta has grown....
30-07-2007:
Two summer '07 fun projects: Up-date with some fullrange experiments and a new crossover for the OB7.
01-08-2007:
Vintage JBL LE20 and LE25 tweeters, how good are they?
30-07-2007:
Two summer '07 fun projects: MAE1 single ended tetrode amp and high-efficiency 3-way dipole, my SFB substitute.
27-07-2007:
Vintage JBL LE26 tweeters. Suitable for high-efficiency systems. How to make a waveguide for LE26.
13-05-2007:
Revive your JBL L100 Century loudspeakers with a new crossover kit from Jantzen Audio.
12-05-2007:
Amish up-date, crossovers for SS 18W/8545-00, 18W/8545-K00, D2905/9500 and D2905/9700, any combination.
24-03-2007:
CNO, SEAS W18NX001 + T29CF002/T29CF001, two-way high-end floorstander in 24 litre cabs.
20-03-2007:
Why ScanSpeak 9500 and 9700 tweeters aren't the same.
16-03-2007:
Coils for beginners. How to choose the right coils for your project.
18-02-2007:
Tweeter distortion test. By request some distortion tests and comments on ribbon tweeters.
18-02-2007:
New HES-intro page. This page about high-efficiency speakers needed an update.
15-01-2007:
Vintage drivers, the Wharfedale Super 3 tweeters.
12-01-2007:
Vintage drivers, the Wharfedale Super 8 RS/DD, how good are they?
11-01-2007:
Tweaking Supravox 215GMF. Fountek NeoPro5i and JBL LE26 tweeter with waveguide.
11-01-2007:
Vintage drivers, the Goodmans Axiom 150 mkII, restoration and evaluation for coming projects.
11-01-2007:
24 liter floorstander from ScanSpeak 18W/8542-00 + D2905/9700 or 9500.
01-01-2007:
High-efficiency mini, Fostex FE126E + Fountek NeoCD3.

27-09-2006: HES-II update. The Vifa C20 option.
23-09-2006:
C17-III-revised. Thanks to Åke in Sweden, a few changes has been made to improve tweeter performance.
10-09-2006:
C17-III built by Aake, Sweden.
04-09-2006:
HES-II. Chapter II on High Efficiency Speakers. A 55 litres two-way with 93-94 dB sensitivity is presented.
08-08-2006:
Vifa C17-II. Finally! Simplicity is sometimes the most difficult thing.
18-06-2006:
Poor Man's Strad/EXCEL, the EXCEL version of PMS.
15-05-2006:
Poor Man's Strad. A wide baffled speaker with a 91 dB sensitivity. SEAS CA22RNX + MCA15RCY + 27TFFC.
25-04-2006:
Images and comments on SP38 and Ellam, built by Emil, Macedonia.
23-04-2006:
SEAS W15CY001 + HIQUPHON OWI mini-monitor.
12-04-2006:
SEAS Kit 503, vintage HiFi speaker kit. How do these 25 years old speakers perform compared to modern speakers?
08-04-2006:
Vifa C17-I, 95 dB/2.8 V d'Appolito from Vifa drivers - if you can find them.
31-03-2006:
Philips vintage 9710, Third Chapter - and the last one, I promise!
27-03-2006:
Ellam d'Appolito, low impedance, high sensitivity. Try it and report back.
20-03-2006:
TJL floorstander. Two new tweeter options, the Fountek NeoCD3 and the SEAS T25C001.
18-03-2006:
Ellam, monitor, ScanSpeak 15W/8530-K00 + D2904/9800 tweeter.
18-03-2006:
Philips 9710 fullrange driver; what you can do and possibly should not do.
18-03-2006:
Philips 9710, 9710 + NeoCD3 ribbon tweeter.
13-03-2006:
3WClassic, a 3-way, 90 dB/2.8V classic speaker made from SEAS CA22RNX + MCA12RC + 27TFFC. Easy crossover.
09-03-2006:
The TJL2W made my Henrik in Norway.
08-03-2006:
Monacor SP200X + Fountek NeoCD3, an easy 90dB/2.8V, 2-way for valve amps and possibly fullrange fans.
05-03-2006:
Check SP93 made by Graeme. Very nice work.
05-03-2006:
Pictures from the workshop, March 2006 projects.
03-03-2006:
W15-NeoCD3, monitor from SEAS W15CY001 + Fountek NeoCD3
28-02-2006:
Philips 9710, the Peerless option
21-02-2006:
TJL3W available as pdf file. Download from here.
28-01-2006:
Acapella SEas, not an upgrade but an alternative tweeter; however, changes the sound radically.
20-01-2006:
The TJL3W, 24 litres floorstander, SEAS W18E001 + SEAS W12CY001 + HIQUPHON OWI
08-01-2006:
Restoring the JBL L26 Decade. Part I. Refoaming of bass drivers and a new 4th order crossover.
01-01-2006:
The importance of wiring a crossover correctly. Read mail from Acapella builder.

11-12-2005: SEAS W15CY001+HIQUPHON OWI, mini-monitor, build by Andy, US.
09-12-2005:
Scan-Speak 18W/8531G00+12M/4631G00+D2904/7000. New 3-way construction, the Ekta.
24-11-2005:
Scan-Speak 18W/8543-00 + 13M/8636-00 + D2904/9800. New 3½-way construction, the Zahra.
24-11-2005:
Design Criteria. How do we choose the right points of crossover?
15-10-2005:
Tannoy MG IIILZ. More crossover work.
28-09-2005:
Vintage BC1, Martin Colloms has the explanation on the HF1300 tweeter.
28-09-2005:
SEAS T14RCY-P/H + ScanSpeak D2010/8513.
23-09-2005:
Tannoy MG IIILZ, read here. Crossover version 3 running. And tweeter phase problem solved.
21-09-2005:
Peerless HDS164 + Vifa XT25TG, diy-service for one of my friends produced this 2½-way construction.
27-08-2005:
Vintage hifi, is it worthwhile? Read about JBL drivers, Spendor BC1, LS35A, Philips 9710 and more.
27-07-2005:
Acapella WB, wide baffle experiments. Intro with links below.
17-07-2005:
High-Efficiency-Speakers. The never ending search; some initial thinking here.
16-07-2005:
Tannoy Monitor Gold, 15" aural nirvana? Lots of photos, 900 KB.
29-05-2005:
Acapella SE, build by Mark in California.
04-05-2005:
W1500/97, monitor: 10.5 litre vented enclosure. ScanSpeak 15W/8530K00 + D2905/9700.
22-05-2005:
W1501/95, monitor: 10.5 litre, closed/(Vario-)vented: ScanSpeak 15W/8530K01 + D2905/9500.
10-05-2005:
SP38/13 Crossover and Construction Pictures.
15-03-2005:
Modified 2.5 Clone (Danish) Hans Buhl Houmøllers' construction of the "2.95".