"Arny Krueger" wrote in message
...
"TonyL" wrote in message


I want to drive low-z (32 ohm) headphones using op amps.

snip

There are even such things as op amps that are designed to drive low
impedance loads and work from single-ended supplies.

Indeed there are. Since 32ohm is now the standard for headphones there are
plenty of heaphone amps intended to drive 32 ohm h/phones on the market.
Mostly they are designed to work from single-ended supplies of around 3-12V

The odds that they will be quads is about zero, since headphone drivers
are typically used in pairs.

Agreed. I know of no quad op-amps that will do the job. I think Tony should
accept that he will need a separate h/phone amp chip.

David.