What is the best replacement opamp for the MC4558?

premiumplus

Chief Journeyman
Joined
Feb 21, 2013
Messages
640
Location
Flint, MI
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Stuck in the 70's
#1
I have a Dahlquist LP-1 active crossover that uses 5 of the old 4558 opamps.
I recapped it and installed sockets for them while I was in there.
Is there a current opamp replacement that will sound better in this application?
I'm looking at the OPA2134PA, or LM4562 as possible upgrades. The LM4562 is said to be better above 1kHz, which is irrelevant in this application (see schematic).
Thoughts? Dahlquist DQ-LP1 Schematic.jpg
 

Gibsonian

Chief Journeyman
Joined
Aug 3, 2011
Messages
823
#2
I highly recommend the LT1364. Use it wherever/whenever I need an opamp. Easily bests the 2134 or 4562 for my ears.
 
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