2. amps-preamps
  3. 195215-189789

op amp rolling

https://photos.google.com/photo/AF1QipO7mVKfzW_dSV5rxCvMv4z2gwdtk1cLM3eSFhIy

I have a setup for a send system that I have been playing with to see what I can do on the cheap and I've been quite surprised at the result so far. I've been reading about supposedly major improvements in performance of the Fosi ZA3 amps with op amp swaps. I'm wondering if anyone else has had any experience with the various ones available. I'm running the dual mono with XLR on each speaker bi wired to max the power which means I'll need three per amp which will cost more than the amps so I'd like to get it right the first time if I can. I'd like to take some of the sibilance from the top end which some I reckon comes from the nature of the speakers (Klipsch RPM 600II). Any opinions/advice would be most welcome. I'm looking at the Burson v7 vivid and the sparko but the sparko has been reported as softening the ZA3 too much which the reviewers on youtube seem to like for the V3 mono but not for the ZA3. I have attached a link to the setup because I cand figure out how to attach the photo to this forum. Thanks in advance

johnnybwood

Showing 2 responses by audiodwebe

audiodwebe's avatar
audiodwebe
265 posts
 

I also have the Fosi monos and have upgraded the op amps to the SparkoS brand. For balanced, you’ll need two op amps per mono and not three. Three if you’re also swapping out the op amp for the RCA input.

I don’t recall the improvements I heard as I did the swap many months ago, but to my recollection there was more detail in the music. I was pleasantly surprised with the improvements the SparkoS made to an already good sounding pair of monos. 

I also upgraded the power blocks but that improvement, if there was any at all, was rather small and I might have just imagined it. But the SparkoS was clearly audible.

 

audiodwebe's avatar
audiodwebe
265 posts
 

Hey, johnnybwood.

Sorry for the late response.

I hav the V3 Monos. With them, you only need to swap out the opamps in the RCA circuit if you're using RCA. Like others, I paid more for the opamps than I did for the amps. 

But like I said before, the improvements were easily noticeable.

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