Beyerdynamic A20

The Beyerdynamic A20 headphone amplifier matches perfectly with any high-end headphones. The internal construction is based on the reference amplifier A1. This amplifier boasts discrete output circuits that provide ample power and impedance-intensive headphones (30-600 ohms). The sound quality you experience is far better than any set of headphones could do alone. Do you have a friend that wants to listen?  Invite him or her to plug in and you can both enjoy high-quality playback.
 
Parameters and Specifications:
 
Audio characteristics:
Input impedance: 25,000ohms
Maximum gain: 18dB
Frequency range: 10 - 100,000Hz (-1 dB)
Total Harmonic Distortion (T.HD): 0.01% at 170mW / 250ohms
Channel Separation:> 80dB at 1kHz / 250ohms
Output power: 100mW / 600ohms, 170mW / 250ohms, 150mW / 30ohms
Signal-to-noise ratio:> 100dB (unweighted)
Output Impedance: 100Ohms (Headphone Output)
 
Power supply:
Input: 100-240V AC, 50/60Hz
Nominal consumption: <10W with built-in power supply
 
Connectors:
2x 6.3mm headphone out
1x stereo line output (2x RCA)
1x stereo line-in (2x RCA)
 
Design:
Color: silver
Material: Chassis made of brushed aluminum
Dimensions (Chassis / Outputs): 164 x 194 x 48/164 x 212 x 55mm
Weight: 1640g
Standard accessories:
Power cable