Op amp selection for frequency ranges

[chasmo]

Hi.

I have a tri-amplified system using 5" wide band paper cones for the mid bass/lower midrange(125-500Hz),

3" full range cones for the midrange (500-3,000hz) and planar tweeters for the treble(>3khz).

 

The amplifiers have sockets to allow for changing the (dual) op-amps.

 

I have 4 pairs of op-amps to select from: OPA2134, OPA2604, OPA1656 and LM4564's.

Anyone have experience with these op-amps and suggestions for which frequency range each one works better(best)?

I appreciate your kind comments coming from actual experience with these op-amps.

-Chuck

[mbz]

What opamp is originally installed? Are the replacements compatible (current draw, +/-V,,,).

 

I've used LM4564's and OPA2134 in preamps but not as you are intending. The OPA2134 performed well in the midrange warmth/presence/"air" area so as a first attempt I'd try that. The LM4564 was VERY slightly more clinical and I'd be using it for the tweeter duties. Since you have sockets you will eventually try "all" combinations so let us know what worked best.