An ARC amp will not likely resolve this problem, as others have told you. I had the same problem with an ARC LS25MKII preamp with two different ARC solid state power amps (150.2 & 300.2). It was resolved when I purchased the newer ARC LS26 preamp.
It seems your most inexpensive option would be to send it back to ARC and have the gain modification done. My experience in dealing with ARC to resolve any equipment issues has been excellent.
Best of luck
It seems your most inexpensive option would be to send it back to ARC and have the gain modification done. My experience in dealing with ARC to resolve any equipment issues has been excellent.
Best of luck