All posts related to sales have been moved to Swap Meet:
- https://www.diyaudio.com/community/threads/lm4562.423048/post-7902121
That probably depends on where the RF gets in. Injecting RF into the inputs of an opamp can cause DC offset shifts. You've probably come across the BRRR-BRRR-BRRRRT noises on the output of amplifiers when you have a GSM cellphone nearby and a call or text comes in.
Tom