Tweakers' Asylum

RE: Upgrading the CABRE AS45 active crossover

32.216.80.249

reuben

In Reply to: RE: Upgrading the CABRE AS45 active crossover posted by KanedaK on October 13, 2016 at 06:15:00

The TL082 is nasty in comparison to modern op amps. Getting rid of them should make the improvements you desire. If the circuit impedances are >5K ohms, the OPA2134 could be a better (less noisy) choice. Decoupling per the datasheet is not optional. And most of all, have fun!

Dark energy? Ridiculous!
We live in an electric universe.

Edits: 10/13/16 10/13/16

Follow Ups:

RE: Upgrading the CABRE AS45 active crossover - KanedaK 02:53:17 10/14/16 (1)
I don't have the board under my eyes right now, and i don't have any schematics, but i guess each opamp has two 10uF lytics about 1,5inch distance from it, and a couple small value ceramic (?) caps, so it looks like opamp decoupling would be enough for OPA2134?...
- RE: Upgrading the CABRE AS45 active crossover - reuben 07:08:32 10/14/16 (0)
  If there are small ceramics on the power supply pins very close to the op amps, you should be good to go. In all my travels, I have never seen vintage gear so equipped but it is possible.
  
  Dark energy? Ridiculous!
  We live in an electric universe.

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