this was a quote from Wyred4sound on this thread : http://www.avsforum.com/t/855660/d-sonic-custom-audio-amps/120#post_13063444
: There are many differences between the units. Our unit has input buffers which raises the input impeadance to 60K ohms. Our input buffer consists of a dual FET design that makes the ICE modules have a sweeter tone. Also, the input buffer allows your source to easily drive the amplifier, especially for Tube sources. The ICE module alone will have low input impeadance in the 7K range which will cause the source signal to work harder to arrive at the amplifier in tact. The harder it is to drive, the more signal that you will loose in transmission, thus less detail.
We offer Dual 15A IEC's that allow more current, and the ability for cable upgrades if desired. 12V Trigger input and output come standard with complete off in stand-by mode via trigger, and front panel switch. Future upgrades are also made easy due to the modular design, and expandablity.
We also modify our modules with a couple of upgrades which we perform on our modifications to other units. All components on the boards with audio signal are competed with audiophile components, such as Dale resistors, MUSE and Wima caps. There are some upgrades to be done to our amplifier such as binding posts, and speaker connections. However, we make our units, for the most part, already modded with a couple of options for those who would like to take it further. With that said, I'm sure that you can assume that other amplifiers will take much more effort to sound similar to ours if at all possible depending on the design.
For your other question: We do manufacture the D-Sonic amplifiers. Modifications to any unit is possible, however, there will be much more to do to other products. We design our products to be better in stock form than others. You could say that our amplifier is more high-end than others. We put the best of the best together to fabricate our "stock" unit.
I hope that this answers your questions, and please let me know if there is anything else that I can either clarify on or help you with:
Now that may not be the case any more but it was then and could still be even though they are not in the same state. I loved my wyred amp and I love my D-sonic amp. Dennis was reason enough to go with D-sonic. I did have a bad module but I fixed it up quickly.