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Beyerdynamic A20 Headphone Amplifier

Beyerdynamic A20 Headphone Amplifier Enlarge


  User Guide

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Beyerdynamic A20 Headphone Amplifier
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Our Price: £439.00
Product code: 59454
Superfi 1 year guarantee included
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The A 20 headphone amplifier is used to operate up to two head- phones with a nominal impedance from 30 to 600 ohms.

The power amplifier, of a discrete design, and the combination of selected high-grade components inside the device allows even high-impedance hi-fi headphones to be driven flawlessly over the entire frequency range. The A 20 supplies an impressively natural and transparent sound with excellent resolution and spatiality. The volume control adjusts the volume for both headphone outputs, which are connected in parallel. Its handy button is made of solid aluminium and hides a high-grade ALPS potentiometer with smooth volume values.

Gold-plated RCA phono sockets on the rear are used to connect the audio source and allow a signal transmission without loss. The input is looped-through, which means audio signals that are present at the INPUT sockets are routed to the OUTPUT sockets, even when the device is switched off. Due to the hard-wired design there is no loss.

The high-quality metal housing is made of brushed aluminium and protects against signal scattering and vibration. Due to the internal wide-range power supply the A 20 can be operated with 110 V/60 Hz and 240 V/50 Hz, allowing for global use.

Connectionsx1 line input (RCA phono sockets)
x1 line output
x2 headphone output (1/4" stereo jack)
ExtraSignal-to-Noise Ratio: >100 dB (unweighted)
Total Harmonic Distortion: . 0.001% at 170 mW/250 ohms
Maximum Gain: 18 db
Finish Silver
Frequency response (Hz)10 Hz - 100 kHz (-1 db)
Nominal impedance (ohms) 25
Power handling (watts) Output Power: 
100 mW / 600 ohms
170 mW / 250 ohms 
150 mW / 30 ohms

Power Supply: < 10 W via integrated switching power supply
Supplied accessories

x2 power cables

TypeHeadphone Amplifier
W x H x D (mm) 164 x 55 x 212
Weight (kg) 1.64
E&OE Specifications are subject to change. A great deal of care goes into ensuring that pictures, descriptions and specifications accurately match those of the product. If you spot an error or an omission, or if you have a question about the product, please email us at

*Free Next Day delivery (Monday to Friday, excludes Saturday delivery) can only be guaranteed on in-stock orders placed before 4pm and being delivered to the "UK Mainland", excluding surcharge regions as outlined on our Delivery Information page.

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