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Old 15th November 2005, 03:46 PM   #1
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Default JRC4558, worst op amp EVER....

OK OK I know a lot of people swear by them but in every application I have used them in, they sound and perform like garbage.

The point of this thread is, I don't get why people swear by them...

Scratchy, harsh, NOISEY, overly midrangey and they just severely lack detail. When comparing them to the NE5532, OPA2228 and OPA2604, the 4558 IMO is absolutely put to shame. Those chips have closer specs to a 12AX7 tube and also sound/perform sooooo much better. When I play arpeggios through a circuit containing a 4558, there is such a lack of detail and raspiness that it would be embarrassing in a live performance.

Can anyone possibly tell me why they like these chips so much?
My only thought is it teams up with tube amps better than the superior chips I mentioned...
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Old 15th November 2005, 06:23 PM   #2
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A Telefunken 12AX7 sounds much better than a 4558 op-amp IMHO.

Seriously, whenever I rip open a CD player and find a 4558 in the signal path I sigh in relief because I know replacing it with any modern op-amp will provice a huge improvement to the sound.
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Old 15th November 2005, 07:11 PM   #3
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I'm really glad to hear this since so many people swear by them. I feel exactly the same way you do when I see one
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Old 15th November 2005, 08:20 PM   #4
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yeah, i'm about to rip some o' those off my soundcard. looking forward to it. cant wait to see if it helps even a bit.
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Old 15th November 2005, 08:23 PM   #5
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Quote:
Originally posted by MrGuitardeath
I'm really glad to hear this since so many people swear by them. I feel exactly the same way you do when I see one
Not only you. Every time I see a 4558 in a piece of gear it gets an opampectomy followed by a transplant.
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Old 15th November 2005, 09:38 PM   #6
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Does anyone know why so many people like to use them in guitar gear?

I've never really gotten an answer that made sense.
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Old 15th November 2005, 09:52 PM   #7
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Old 15th November 2005, 10:15 PM   #8
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usage and rating of OpAmps used in Guitar amps
is a different story, as the OpAmp in a Guitar
amp might be intentionally overdriven to
create distortion. Different type of OpAmp
might behave different when overdriven, which
creates specific sound effects.

So a very good Opamp by specsheet and
linear application rating might not create
that specific sound distortion when overdriven.

Regards,
Stephan
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Old 15th November 2005, 10:41 PM   #9
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Quote:
Originally posted by MrCheeks
Does anyone know why so many people like to use them in guitar gear?

I've never really gotten an answer that made sense.
Very low power draw = long battery life.
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Old 18th November 2005, 08:50 AM   #10
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Being 13-1/2 cents each from Digi-Key in small quantity may have something to do with it too.
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