[sdiy] low noise opamp for audio circuitry?

[Anthony Rolando]

Do you absolutely need a quad opa? Cause the OP275 is nice for high gain. Not crazy expensive either. 

Tony

> Date: Sun, 26 Oct 2008 10:32:41 -0600
> To: subjectivity at hotmail.com; synth-diy at dropmix.xs4all.nl
> From: ijfritz at comcast.net
> Subject: Re: [sdiy] low noise opamp for audio circuitry?
> CC:
>
> At 10:19 AM 10/26/2008, Dan Snazelle wrote:
>
>>Sitting here testing a preamp circuit (so i can plug guitar and vocal into
>>my modular).FIRST i was using a TL074. when i listened to the output, and
>>turned up my speakers, I heard a distinct hissing. (even with input turned
>>down.)
>>
>>i WAS testing on +/- 9v battery for safety reasons. maybe the 74 doesnt
>>like 9v.
>>
>>Then i tried an LF444 and all 95% of the hiss went away.
>>
>>But i have a feeling i can do better still.
>>
>>SO---what are some good, low noise opamps (in a 4 way package?)
>
> I've used OPA2227 (dual). For a quad, LT1125 looks pretty good from the
> spec sheet.
>
> Ian
>
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