...or similar IC-based EQ.
Hey, everyone! There's a Yamaha M512 for sale locally and I'm thinking about picking it up to use as a bit of color & occasional summing amp. The fixed three-band, IC-based EQ is the major drawback as far as I can see, and I got started thinking about how I might be able to change the frequency points and even Q if possible. I have some background in tube electronics and do understand very rudimentary guitar-amp style tonestacks, but these 4558-based circuits aren't as intuitive to me since my op-amp knowledge is very, very limited.
I could just buy it and start swapping in different caps, but I'd like to be able to actually do the math if possible.
Can anyone provide some formulas or links to some reference material?
Here's the M512 service manual:
http://89.228.128.119/RemoteDownloader/files/20130125/31815a538f949b2962b6956e0d6cf759/M512YAMAHAServiceManual-EN.pdf
Thanks!
Steve
Hey, everyone! There's a Yamaha M512 for sale locally and I'm thinking about picking it up to use as a bit of color & occasional summing amp. The fixed three-band, IC-based EQ is the major drawback as far as I can see, and I got started thinking about how I might be able to change the frequency points and even Q if possible. I have some background in tube electronics and do understand very rudimentary guitar-amp style tonestacks, but these 4558-based circuits aren't as intuitive to me since my op-amp knowledge is very, very limited.
I could just buy it and start swapping in different caps, but I'd like to be able to actually do the math if possible.
Can anyone provide some formulas or links to some reference material?
Here's the M512 service manual:
http://89.228.128.119/RemoteDownloader/files/20130125/31815a538f949b2962b6956e0d6cf759/M512YAMAHAServiceManual-EN.pdf
Thanks!
Steve