I am wrong here?
I took both my ULD amps into have the Low Pass crossovers effectively bypassed as per the service manual (Thanks Rob). I took it to a well respected local A/V/repair location. They have been there for 60 years, and their tech has been with them for 20+ and is considered a "genius" by them in his ability to fix anything. I actually worked for them for 6 years back in the 90's and still know many of their employees.
The problem is, the tech replaced the low pass resistors as described in the manual, but also changed the value of a resistor that is used to invert phase. It's default was 47 K Ohms, and the service manual says not to alter it. He put in a 1.2K Ohm. When I questioned it (I wanted to see his work, that is how I noticed it), the tech said it wasn't in the signal path and any value from 1K to 100K would not make any difference.
I was a bit torn, I want to believe their tech, but the SVC manual specifically says, don't alter the resistors value. I decided to take it back and have them put in the proper 47K Ohm resistor. They did, but they seemed annoyed that I hadn't trusted them when I picked it up...
I know I really wasn't "wrong" but I guess my question is more for Rob (or anyone else knowledgeable about such things), was he right about the value not making a difference?
Home Theater: Emotiva UMC-200, Citation 5.1 running Mirage M-3SIs, Harman Kardon signature 2.1 running Mirage M-CSI (center) & 4x BIC V-52 (surrounds), Samson S1000 (545 watts x2) running 2 SVS CS-Ultra subs, PS3, PS4, XBOX 1, 2x Adcom ACE-515, Sony HW45ES projector w/ 125" tab tensioned screen or Vizio E-701B-3 - 70"
2.0 setup: Schiit Freya Tube Preamp, Citation 5.1, Mirage M3SIs, Onkyo DV-CP702 (CD transport), Schiit Modi Multibit DAC.
Last edited by brad1138; 09-08-2015 at 06:24 PM.