Originally Posted by oddiodog
Pertanent to this thread, while I was there I asked his thoughts on mods. His opinion is that it's absolutely possible to affect the sound with resistor and diodes and shielding and better transformers etc if they're done right. But he also said he'd never do it or own a modded component. His concern is that adding parts (sorry I can't explain this properly with the technical detail that he did) that might improve the sound might not play nice with the other parts from an electrical or current problem perspective. Like short circuiting. In other words he feels it could increase the possibility of making the amp more susceptable to becoming inopperative and in need of repair. And he said once you add parts the manufacturer doesn't cover it.
I suppose that the technician may be correct for a potential problem or being susceptible to becoming inoperative or having a short for modified equipment. These "upgrades" and modifications have been conducted by the manufacturers, DIY, and many others for a long time in this hobby.
Below are the approximate times that equipment that I have or had that has been functioning since they were upgraded by Dave Schulte and have had absolutely no problem or issues including shorts or non operation:
1) 4 Aragon Palladium 1K monoblock amps- more than 3 years- 2 were sold on Audiogon because they were too powerful for my new main speakers.
2) 1 Krell KAV-250a/3 power amp- 3 years
3) 1 Exact Power EP15A Power unit- 3 years
4) 1 Denon 5910 DVD/CD/SACD player- more than 3 years, later sold
5) 1 Audio Research LS10 Line Stage Preamp- more than 1 1/2 years
6) 1 Lavry DA10 DAC- about 2 years plus
7) 1 Onkyo 885 Pre/Pro- almost 3 years
8) 1 Aragon Palldium 1K monoblock amp- 1 1/2 years
9) 1 Exact Power EP15A Power unit- 1 1/2 years
10) 1 NuForce Edition Oppo 83SE- almost 1 1/2 years
11) 1 Denon 5910CI DVD/CD/SACD player - 10 months