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DCX and SET?, will be long... such a nice subject

Posted by krzys (A) on January 24, 2007 at 05:28:49

In Reply to: Behringer DCX2496 Re: subwoofer crossover posted by Dr Deville on January 23, 2007 at 22:58:09:

SET with el cheapo Behringer, are you serious? This is not an audiophile approved route! See my system:

Sources: Squeezebox 2 (slimdevices.com), M-audio Revolution7.1 soundcard if needed

Digital converter/conditioner: Behringer SRC 2496, upsamples to 48 or 96 /24 bits as used by the DCX

Digital crossover Behringer DCX in 3 x 2 configuration, tweaked with Tent labs clock, BG and oscon caps in power and digital sections, direct analogue outputs à la Scott Endler (or Thierry Martin) and 6 gang Alps potentiometer

Three stereo amplifiers, each have an input potentiometer, feeding directly the drivers of the loudspeakers, a 70 W PP tube amplifier and two SET amplifiers 300B and 2A3 tubes.

Speakers are good old Klipsch Cornwall cabinet only, with a Beyma Cp-21 tweeter, Altec 511/806 horns and Altec 414A woofers.

The most important feature is the DRC, using Inguz plug-ins for Slimserver, By far the most effective tweak! This is a must for the Klipsch squawker and Beyma tweeter which are not linear at all. Apart that DRC take care of the alignment, phase distortion and room reflections.

Planned:
1. a subwoofer to take care of the 25 to 70 Hz but with more humph and power , crossover mad with another DCX , subs built in a closet ( 1550 l, heavily filled with clothes ;-)), drivers : the K34K from the Cornwalls powered with a Hafler p4000 500W amplifier.
2. new output card for the DCX from Selectronic.

Bottom line: DCX is a very capable and flexible tool with decent stock sound becoming much better when tweaked. The real problem is the necessity to keep the signal hot to the DCX and attenuate it after. 6 channel volume controls are rare, mine is basic (6 gang potentiometer)

A lot of information on the web and the best site are:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=15943&perpage=10&highlight=&pagenumber=41 , 116 pages !!!
http://www.dcx2496.fr/ just translated from French
http://tech.groups.yahoo.com/group/DCX2496/ free but must subscribe.

Best output drop in output card, supply, clock and 6 channels volume control:
http://www.selectronic.fr/international.asp

Search the web, study all that and go for it, in the worst case you can resell it with a very slight loss.
Chris

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