Eq-ONe, OPamp exchange

[electroaudio]

I have one of these old workhorses that i want to improve the SQ in.
Right now it is equipped with 4558 or something similar, sounds horrible.
But which ops are suitable for a simple equalizer like this?
Are there any reason not to go with TL072? otherwise i will do that sice i have dozens of them lying around.




-Probably a piece of nostalgica for several ppl here, they were quite popular back in the 80s.

[DoctorJ]

For an opamp upgrade, I would go with OPA2134 to replace 4558.

[electroaudio]

Yeah, i know.
All the TLs i have is from an upgrade i recently made on a neotek desk.

-But it isnt worth the price for this usage, it is intended to be used by DJs to give an easy way to make roomcorrections when they rent it.
I think TL072 is just at the right SQ for that application, but then it is only a handful of opa2134s too, so, its debatable..

Wellwell, i just want to know if it will oscilliate or anything similar, because it isnt easy to disassemble the unit.

[testlab]

My opinion is that you are "gilding the lily" by upgrading this beast. espesially considering the target user. TLO's should be more than adequate.

[electroaudio]

Originally posted by testlab
My opinion is that you are "gilding the lily" by upgrading this beast. espesially considering the target user. TLO's should be more than adequate.

Yes, its a good piece of art but it had some OP distortion that i wanted to get rid off. A shift from bypass to eq made quite a considerable difference before the OP change, now its fine.
but apart from that its a very beutiful piece.
But it is only 10 bands which unfourtunately makes it rather limited for live.


Also, my target customers/users are a bit odd since they actually care about SQ
Well, most of them, some guestdjs think that distortion is an important part of the dancefloor.
-But then, if someone isnt regarding SQ then they arent my customers for long either...