+/-15Vout opamp for gain stage

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Can anybody suggest an opamp wich:

- is known to work well as gain amplifier at +/- 15V output voltage
(i.e. with declared parameters at high output voltage)
- may be used with +/-30V power supplier
- is widly tested subjectively (with ears :) and proved to be excellent
in aufio DIY-ing.

And I'll be happy if opamp's output stage works in Class A, are such opamps there?

Thanks in advanced!
Andrew
 
I have not heared about Class A opamps too :)

OK, I have looked at OPA445 price in my region and it is not very sutable ($30).
If we eliminate +/-30V PS, and leave +/-12V output amplitude - will such
elimination give us more choices? It isn't difficult to supply needed PS,
but output amplitude is important at any case.
 
$30? Ouch. It's only £5 (~$10) here.

Most op-amps can reach within ~3V of the supply rails, so to get +/-15V (assuming that was peak voltage you wanted) you could get away with +/-18V supplies, which would widen your choices a lot. Rail-to-rail op-amps could do it with only +/-15V supplies, and there are plenty of that sort of op-amp around, although they might not be the best for audio (I've never used any for audio).
 
Here is my gain stage & headamp,it is based on a dual LM6172 with solid class B (AB) driver.

LM6172 DATA SHEET

the transistor pairs that I used is B647/D667.
B647 DATA

some helpful discuss on headwize.
URL

inner pic attached,
 

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I think the OPA604 can be run of relatively high voltages (for an opamp), +/-24V if I do recall correctly. Admitedly this is absolute max, but I've been running at 2604 at +/-24V for a rather long time now and it's still going strong. Even the NE5532 can be run of higher than +/- 15V supplies.

It can be argued if the OPA604 is excellent for audio or not, but alot of people like it's sound.

Admitedly these are not +/-30V rail to rail opamps, but hopefully they're more usefull to you than the +/-15V that is ever so common.
 
anli said:
Can anybody suggest an opamp wich:

- is known to work well as gain amplifier at +/- 15V output voltage
(i.e. with declared parameters at high output voltage)
- may be used with +/-30V power supplier
- is widly tested subjectively (with ears :) and proved to be excellent
in aufio DIY-ing.

And I'll be happy if opamp's output stage works in Class A, are such opamps there?

Thanks in advanced!
Andrew

Hi Andrew,
What is your circuit or application?
:confused:
 
Re: Re: +/-15Vout opamp for gain stage

Elso Kwak said:


Hi Andrew,
What is your circuit or application?
:confused:

There isn't final design. I serach/investigate amplifiers with Class-A
output stage. At any case - with or without global NFB, some gain
stage (and balanced line driver) must exist, and I do no reject opamps
using in these stages, but do it for an output stage only :) So, opams as
gain_stage/balanced_driver pros and cons are interesting for me.
 
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