Well, not seeing the circuit, I can't say for sure, but it's probably a voltage sensitive thing (transistors turning on). Most people just use multiple diodes in that case, but who knows. If your man takes them out and the amp doesn't work, then you'll know, won't you? All I know is that a resistor isn't going to do anything wild (they are benign devices) so they aren't hurting anything as long as your amp works.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer