[sdiy] The sound of various Op-Amps

[harrybissell]

<monty python - search for the holy grail : Merlin the Magician...>

ehhhh.... might be.....

H^) harry

Michael Boracci wrote:

> 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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