按這裡可以看大圖

HPA6 - 6 Channel Headphone Amp - 1U
The Alto HPA6 6-Channel Stereo Headphone Amplifier is a professional headphone amplifier system for studio and stage applications. This universal, multi-purpose device features 6 independent high-power stereo amplifiers in one rack unit, and delivers maximum audio quality - even at high volume levels. No studio should be without the HPA6, or its 4-channel sister model, the HPA4.
Professional, universal headphone amplification system for studio and live sound applications 6 independent stereo high-power amplifiers in a 1U rack unit Maximum audio quality - even at high volume levels 6 independent input/mix sections for 6 stereo mixes Stereo AUX IN per channel for additional signal source OUTPUT LEVEL control per channel MONO and LEFT/RIGHT MUTE buttons per channel for additional flexibility 3 headphone outputs per channel on front (1) and rear (2) panels Precision 4-segment LED output level display per channel DIRECT IN on the front panel for additional stereo signal sources Paralleled main outputs to chain several headphone amplifiers Servo-balanced, gold-plated XLR and 1/4" TRS connectors High-quality components and exceptionally rugged construction ensure durability Internal power supply