Ellam-XT
Copyright
2006 © Troels Gravesen
ScanSpeak 15W/8530-K00 + Vifa
XT25TG-30-04
A friend of mine
is seriously in love with the Vifa XT25TG-30-04
and asked me to do the Ellam speaker with this
tweeter. So, once more the 15Ws were back in the
Ellam test cabs.
2009: The Ellam XT
was made around Dec. 2006 and after some two
years on the web, this Ellam XT turns out to be
one of the most popular speakers on this website
- and for good reasons:
- fairly low cost due to the excellent and cheap
XT25TG tweeter
- easy cabinet construction and fairly easy
crossover layout
- probably the best bass performance on the
market from a 10 liter cabinet volume
- 15W has a smooth midrange and a smooth upper
roll-off that makes crossover construction easy
- generally high WAF depending on your skills in
cabinet making
- I could go on...this 15W driver is a winner.
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Check out
the 2½-way version of this kit, the Ellam25
Cabinets
 
No changes to the cabinet, vent tuning or placement of
drivers.
Details to be found at Ellam page.
The Crossover
Only a few changes compared to the Ellam 9800
version.
If you cannot get a 3.0 mH coil, un-wind 3.3 mH to 3.0 mH
- or leave it at 3.3 mH, only very small difference.
18.2 uF = 10 + 8.2 in parallel.
12.2 uF = 10 + 2.2 uF in parallel.
13.3 uF = 10 + 3.3 uF in parallel.
(I have these questions)
- or get it all from here:
Crossover kits available from Jantzen Audio: contact@jantzen-audio.com
Order Superior Z-caps or Standard Z-cap
version.
(I'm
more than serious about suggesting the very best super
caps for this speaker, but be prepared for adding volume
to accommodate huge caps)
 
All components were mounted on a piece of mahogany board.
No lay-out will be given this time.
Measurements:
 
Left: SPL for 2.8V/1m. Right: Horizontal dispersion at
0°, 10°, 20°, 30° and 40°.
 
Left: Left and right speaker from finished crossovers.
Right: Impedance of finished system.
 
Left: Impedance again showing 5 ohms minimum. Right: Red
= inverted tweeter polarity from tweeter height, 1m.
As always, the XT25TG excels in a smooth, un-coloured
treble and
should you not - for some reason - like alu-domes, this
may be an option.
Back to intro page.
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