Edirol UA-3FX external USB sound device. Has a variety of guitar effects,
which of course are bypassed by default. Functions as a DAC, ADC with
very nice quality sound. Bus powered and fairly compact, works well
with a laptop to get good quality sound. Edirol.com has all the specs.
Quickly though, has Mic in (powered), guitar in, line in, line out, toslink
in, toslink out, and a headphone. The headphone amp is not bad - fairly
clean but not real powerful. I use it with HD-650s and ER-4Ps and a
headphone amp (X-Cans - also for sale and a CMoy) to get some great
sound while "working". The large volume knob is a nice feature. Asking
$145 shipped obo.