Ultra-compact 4-channel stereo headphone amplifier for all types of headphones.
Ultra-compact headphone amplifier system for studio and stage applications
4 independent stereo high-power amplifier sections
Highest audio quality with virtually all types of headphones even at maximum volume
Phones Level control per channel
DC 12 V adapter included
High-quality components and exceptionally rugged construction ensure long life
The super-compact, flexible HA400 can amplify up to 4 pairs of headphones and up to 4 independent volumes all at the same time.
The flexible HA400 contains 4 high-power stereo amplifiers that maintain the highest sonic quality even at maximum volume levels. Ultra low-noise 4580 operational amplifiers are included for outstanding audio performance. These are the same op amps found in full-size audio equipment.
SPECIFICATIONS
MICROAMP HA400 Headphone Amp
Input
Type: 1/4" TRS connector, stereo
Impedance: 100 kOhms
Max. input level: +15 dBu
Headphone Outputs
Type: 1/4" TRS connector, stereo
Impedance: approx. 80Ohms
Max. output level: approx. 40mW in 100Ohms
Power Supply
(external power supply, 12V / 150mA)
Power range: USA/Canada (120V~, 60Hz), China (220V~, 50Hz), U.K./Australia (240 V~, 50Hz), Europe (230V~, 50Hz), Japan (100V~, 50/60Hz)
Dimensions
Dimensions (HxDxW): approx. 1-5/6" x 2-1/4" x 4-1/16", (approx. 46.5mm x 57.2mm x 103.6mm)
Weight: approx. 0.38lb. (190g)
Audited Supplier 
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