Balanced Version Pga2311 Preamp Board Volume Controller Instructions

I haven't done lots of testing with the PGA's yet, but I don't think they should make noise when changing volume levels, gain or not. Keep in mind that getting 130dB of channel separation is going to be very dependant on board layout as well even in my design board layout probably has more effect than the ICs. I'm going to do a 6 channel preamp so I won't have room for single channel opamps, but you may choose to prioritize differently and avoid crosstalk - if you go for individual chips, maybe look at LMH6321 which is apparently very good (and it's extremely fast). This opamp has pretty impressive specs, and I think it sounds good, so I'm fine with it - but it's not particularly fast, and the channel separation isn't as good (118dB at 1KHz). My plan is to use LME49720 as the input buffer, possibly with an active low-pass, and no output buffer PGA2320 has an internal opamp that can drive any reasonable load, I don't see why another stage is necessary. I remember hearing from someone somewhere that the internal output stage in the PGA23xx is based on OPA2132, but I'm not sure how reliable that is. And also some additional informations except these answers. And a last question about the buffer again some other body (that I also cannot remember his name) says the buffer with gain will sound better than an unity gain buffer. Is this information true? Has anybody tried that? However if you use PGA with some gains (internal gain) then you may hear some noise while changing the level. Somebody mentioned (I cannot remember who he is) before if you use PGA without gain (<= 0dB) then you cannot hear anything while changing the volume level. So what kind of opamps in the buffer give the best result by the meaning of total slew rate of that preamplifier? However there is no slew rate information for these opamps. This IC has internal opamps, we know that. So if we use a dual opamp as the input buffer then can we catch the same value on channel speration? Or should we use seperated opamps like OPA134 per channel? This IC has (PGA2311) a really good channel seperating value (-130dB). I dont know if error401 already made this preamp or not.

Then I decided to make a PGA2311 preamp now! With a friend who can write some PIC codes. I wrote something a long time ago in this topic.

Balanced Version Pga2311 Preamp Board Volume Controller Instructions