@soundermn
Yes, I did do it. I bought Burr Browns with some really great specs. I wanted to first try them as opposed to some super custom ones due to expense. The BBs were about $15 for two.
I used dual op amps because that is what I think is in there to begin with. I did the 2 in the amp stage, I didn't do the third one in the power section of the amp.
I heard a mild improvement (not a big change) in further noise reduction. There could be other changes that I just didn't take notice of because the surface noise (already quiet with the Chinook) improved a bit. That was easily detectable because I know what noise to expect on certain records from playing them many times before.
This wasn't a huge improvement but worthwhile and cost effective. I'd be curious to try what Johnss recommended--the sparkos labs op amps. But they aren't cheap.
The one thing I can say about the Chinook is that it's going nowhere in my system. I cannot imagine how much I'd have to spend to upgrade. It's a wonderful preamp. I'm really attached to it unlike other pieces of equipment.
Yes, I did do it. I bought Burr Browns with some really great specs. I wanted to first try them as opposed to some super custom ones due to expense. The BBs were about $15 for two.
I used dual op amps because that is what I think is in there to begin with. I did the 2 in the amp stage, I didn't do the third one in the power section of the amp.
I heard a mild improvement (not a big change) in further noise reduction. There could be other changes that I just didn't take notice of because the surface noise (already quiet with the Chinook) improved a bit. That was easily detectable because I know what noise to expect on certain records from playing them many times before.
This wasn't a huge improvement but worthwhile and cost effective. I'd be curious to try what Johnss recommended--the sparkos labs op amps. But they aren't cheap.
The one thing I can say about the Chinook is that it's going nowhere in my system. I cannot imagine how much I'd have to spend to upgrade. It's a wonderful preamp. I'm really attached to it unlike other pieces of equipment.