RC4558 Dual op amp upgrades

crippledchicken · 4th June 2006, 08:51 PM

i was wondering, if it might be worthwhile to upgrade these op amps in a subwoofer plate amp since the frequencies are so limited or, not worth the trouble? if so, what would be some good choices of op amps to upgrade to. thanks!

DigitalJunkie · 5th June 2006, 03:01 AM

I've used TL072/82's as "drop-in" replacments in a few various circuits using the 4558..
A couple time's i've had stability issues (a subwoofer X-over,and something else,i forget.) so you'll want to keep an eye out for that.

Maybe not the best op-amp,but probably a bit better than the 4558,and it's J-fet too.

My cheap Sony CD changer sounds better with 82's in it,than it did with the 4558's.

crippledchicken · 5th June 2006, 11:46 PM

thanks for the advice! i'll give them a try and see how it goes. thanks crippledchicken

4th June 2006, 08:51 PM	#1
crippledchicken diyAudio Member Join Date: Dec 2003 Location: south east mo.	RC4558 Dual op amp upgrades i was wondering, if it might be worthwhile to upgrade these op amps in a subwoofer plate amp since the frequencies are so limited or, not worth the trouble? if so, what would be some good choices of op amps to upgrade to. thanks!

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5th June 2006, 03:01 AM	#2
DigitalJunkie diyAudio Member Join Date: Apr 2003 Location: Portland,Oregon Blog Entries: 4	I've used TL072/82's as "drop-in" replacments in a few various circuits using the 4558.. A couple time's i've had stability issues (a subwoofer X-over,and something else,i forget.) so you'll want to keep an eye out for that. Maybe not the best op-amp,but probably a bit better than the 4558,and it's J-fet too. My cheap Sony CD changer sounds better with 82's in it,than it did with the 4558's.

5th June 2006, 11:46 PM	#3
crippledchicken diyAudio Member Join Date: Dec 2003 Location: south east mo.	thanks for the advice! i'll give them a try and see how it goes. thanks crippledchicken

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