The Behringer DCX2496 digital xover is an incredible tool for extracting the most from a bi or tr-amped system.  The combination of high xover slopes (48db if wanted), all manner of EQs, and time alignment allow transparency to emerge without the limitations of passive xovers and room interactions.  However, even though the stock Behringer has great functionality it has ordinary ADCs, DACs, power supplies and analog stages (hey, it costs less than $300...it is amazing it sounds any good at all!).  This is where we come in.  The stock Behringer is OK sounding but modified it is close to invisible.  This xover is sold as part of the Emerald Physics CS1/2/3 speakers and we will be also selling it modified with our upcoming speakers.  If you think your Emerald Physics, Magneplanars, Open Baffle, Horn speakers, etc. sound good with the stock xover you have a treat coming.

The modified Behringer can also be used as a stand alone DAC with the benefits of full speaker/room equalization.....imagine, totally flat frequency response at your listening position with no nasty bass nodes.  The Behringer upsamples digital inputs to 24/96 on the input and then runs all the processing at 24 bits.  The analog inputs are done at 24/96 using the latest AKM ADC chip with our own super input stage.
  
Below is a list of the things we are currently doing and the current pricing. 

1.  Substitute Canare RCA jacks for the existing XLRs.  Most people use RCA jacks and using adapters is a sonic no no.  $40 per pair.   $120 for analog in and two sets analog out.  $160 for three channels out.

2.  Add Canare RCA jack (or BNC jack) to side of chassis for direct digital in.  We wire the jack directly to the input transformer and change the load resistor to 75 ohms for best impedance match.  $25.00   If you want balanced in then we can wire the existing stock XLR directly to the input transformer for $10.00

3.  A to D and input stage mod: (9-8-11) We have developed an even better input stage for the A to D converter. We use a zero feedback class A buffer driving a Lundahl amorphous core transformer on each channel. This is even more pure sounding, detailed, and lower noise than our older circuit that was capacitor coupled.  These transformers are expensive ($140 each).  They are hardwired directly to the input pins on the connector on the main board.  We also change the A to D converter to the latest converter from AKM....the AKM 5394.  Blackgate and Wima caps and are used here.  The Lundahl transformers must have the buffer in front of them for best sound.  We listened both ways......very important.  $550

4.  D to A mod: We change two of the three the DACs in the DCX to the latest 24 bit AKM DACs the AKM 4396.  We also change several power supply caps to Blackgate.  $150.  For all three stereo DACs the cost would be $175.  Any mod that does not upgrade the A to D chip and all the DACs is not serious.  The parts in the stock Behringer were designed over 10 years ago.  The DAC chips have gone through 3 generations of improvement since then.

5.  Custom output stage:  We delete all the parts on the output board and substitute our own circuit boards with super simple output stage directly coupled to the output jacks.  This circuit is direct coupled, no coupling caps.  These circuit boards are wired directly from the pins on the main board.  For four channels the cost is $200 unbalanced or $250 balanced .  Six channels would be $275 or $325 balanced. 

6. Add two modified discrete regulators for all the opamps/buffers on the input and output..... $125 . In conjunction with our new op amp output stages this is quite something.....super transparent.

We consider all the above to be "must do/have" and consider it our standard package.     The total cost for a basic mod (for biamping) to the DCX2496 with RCA jacks, analog A to D mod, digital RCA in, D to A mod and four channels of outs would be $1170 ....for six channels of outputs (triamping) it would be $1310 .  Pricing is for unbalanced ins and outs.



7.  Super duper output stage (bi-amp only).  We can use the same formula on the DAC outputs as our new buffer driven transformer ADC input stage for even better bi-amp performance.  There is not enough room in the Behringer to do all six channels (tri-amp mode).  Even more purity, naturalness and detail result.  These tranformers cost $140 each (four of them needed) and the buffers are $10 each (8 needed)....so my parts costs are high and there is much more labor so this mod is expensive.  $850.  (This mod would be in place of the normal $200 output stage).  If you wanted the best way to tri-amp then you could have two Behringers modded and one would only be a single two channel out unit (for bass) with my standard output stage (perfect for bass) and then use the other all out modded Behringer for the mids and highs.  Another much less expensive option for tri-amping would be to use the $400 Behringer Inuke 3000dsp amp for the bass since it has built in digital xover and equalization and is perfect for bass use.   The price for an all out bi-amp modded Behringer is $1820 (including digital in).   

In our mod we remove most of the output/input board but leave the part that allows you to connect to a computer or download new software.  Any mod that removes this part does not make sense.