After waiting 5 weeks for my 750s (vendor was waiting for a shipment from Ultrasone USA, who was out of stock), I finally got mine(sigh...). I had spent about an hour listening through a pair at a friend's and really liked them; didn't really pay that much attention to them visually. On...

Ok, I know that low impedance cans don't need a lot of power to drive them efficiently and high impedance ones do. But why would one choose higher impedance over low. Beyerdynamic, for example, offers their DT 770 Pros in three different impedances, 80 ohms, 250 ohms and 600 ohms. Why would one...

If you like to burn-in your cans and amps using pink noise(or other wave types), there's Audio Test http://www.katsurashareware.com/pgs/audiotest.html In addition to pink noise, it can generate a number of other wave types as well, and the frequency levels of each can be custom configured...

I acquired a pair of DT-770 Pros, one of the first models, with 600 ohm impedance (they're in mint condition). They sound good, to me, but I'd like to know the pros and cons of such high impedance cans. I'm not really up on impedance vis-à-vis 'phones. Most cans are of much lower impedance, and...

I'd like some recommendations for a good Mac compatible external soundcard for my Powerbook. Anybody?

If I use computer as source, must I use an amp with USB DAC interface capability for best performance, or can I get maximum bang from an amp without one?