[sdiy] The sound of various Op-Amps

[Michael Boracci]

Harry,
Is that why I see it in a lot of guitar related and stompbox circuits?

"The 5532 is best suited for really low input impedance"

MB



-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of harrybissell
Sent: Sunday, September 21, 2003 8:58 PM
To: Andre Majorel
Cc: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] The sound of various Op-Amps


RE: 5532

The 5532 is best suited for really low input impedance... maybe 1K would
be optimal and 10K an outside limit.  Higher than that...all your low-noise
benefits fade away.

It also has pretty poor offset voltage, which means in high gain
applications
you better use it as an AC amplifier only.  I tried a DC coupled amp ONCE
and found that once I reached the gain I wanted... the output offset was in
VOLTS.

Its a great preamp imho...  for higher impedances the TL07x will kick its
butt.

H^) harry

Andre Majorel wrote:

> On 2003-09-18 20:51 -0400, Michael Boracci wrote:
>
> > Since joining this list recently, I have viewed some really great web
> > pages which are maintained by some really excellent engineers and
> > synth builders. I have noticed that a lot of modules and general audio
> > circuits are designed around the TL-08X series of Op-Amps, of which I
> > am quite fond.  I am aware that there are better op amps available in
> > terms of slew rate, CMRR, THD, etc., however is there anything that
> > can be said for the "color" or "sound" of the many Op-Amps that we
> > have at our disposal?  I have used either the TL-08x series, or some
> > of the newer Analog devices stuff for my builds and they seem to sound
> > great.
>
> What I got out of
>
>   http://www.dself.dsl.pipex.com/ampins/webbop/opamp.htm
>
> is that the 5532 is basically a high-end op-amp at a lowish price.
> It's very comparable in performance to the OPA627, but costs
> twenty times less. The only area where the OPA627 seems clearly
> superior is slew rate (55 V/µs vs. 9 V/µs).
>
> It draws thrice as much current as a TL07X/TL08X and has ten times
> less distortion.
>
> I've been kind of wondering why it gets so little use in analogue
> synths.
>
> --
> André Majorel <amajorel at teaser.fr>
> http://www.teaser.fr/~amajorel/




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