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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
audiodwebe's avatar
audiodwebe
275 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.

 

johnnybwood OP
75 posts
 

audiodwebe

Are you running the mono's or the za3?

johnnybwood OP
75 posts
 

bigeks357

Did the vivids reign in and take some of the edge off? Do you think it was significant enough to justify it? Looks like about 500.00 for the six. Won't bother with the sub outs. Doubt there would be any appreciable gains there.

johnnybwood OP
75 posts
 

audiodwebe

Removing RCA op amps makes a difference and the amps still function for XLR?

ntpc4
44 posts
 

I used to have a pair of FOSI V3 Monos where I settled on the MUSES02 op-amps after trying the Sparkos. They were reasonably priced (relatively) and sounded the best to me.

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