[sdiy] DIY Mixer - please help!

[Antti Huovilainen]

On Thu, 3 Sep 2009, cheater cheater wrote:

> I believe this is to achieve high headroom. Unconfirmed information
> tells me that most op amp designs will distort more the closer you get
> to the maximum output voltage.

I doubt this is the case except when you're almost at the rails. A more 
important limitation is simply the maximum supply voltages audio opamps 
will tolerate, which for the NE5532 (very low distortion opamp if the pcb 
is designed correctly) is +- 22V max. Not that having "only" 27 dBu max 
level is a problem IMO.

> Do you think that a 741 will handle this sort of use?

No. The comment about 741 was meant to show how poor some of the 
electronics were in some respects.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova