| | HiFi headphone review featuring Airhead and Bithead amplifiers: Page 5 |
 | | With most portable players, as little power as is reasonably possible is dedicated to powering the headphones, ranging from the latest hard disk players and their lithium-ion rechargeables, to the smallest flash based players that run off of one AAA for many hours at a time. |
 | | If you were to do a direct comparison between the Bithead and Airhead, using the same analog source, you wouldn't be able to tell the difference between them; they provide the same circuitry under their skin. |
 | | Plugging the Airhead into our Yamaha HTR-5440 receiver's unamplified outputs (Receiving input from a digital connection to a PC, or from a Denon CD player), the results were as expected: the Airhead was roughly on par with the headphone output on the receiver, with a lower noise floor and crossfeed as bonuses. |
| arstechnica.com /reviews/other/HiFiHeadphones.ars/5 (1420 words) |