Description

The A 1 headphone amplifier has been developed to operate headphones with nominal impedance from 30 to 600 ohms. It provides excellent audio quality with high volume and strong bass response. The special circuit design features an amazingly natural sound reproduction with a very good resolution and spatiality. All the circuitry is capable to transmit 96 kHz allowing the transmission of the whole frequency response of a SA-CD or DVD audio. As a result of a microprocessor-controlled relay, two high-class stereo sound sources will also be selected silently. The volume regulate is made of solid aluminum with a high-grade ALPS potentiometer inside. The gold-plated RCA connections at the rear allow the connection of audio sources and provide a signal transmission without loss. A big dimensioned toroidal core transformer ensures high fidelity of impulse and dynamics. The combination of selected high-grade components allows even the highest-impedance headphones to be driven flawlessly over All the frequency range. High impedance at the headphones output ensures the regulate range of the volume potentiometer to be perfect for low-impedance headphones, too. One input is passively connected with the Lineout of the A 1 to loop through incoming signals even when the A 1 is in stand-by mode. Two blue LEDs at the front display the active signal input, every other multicolor LED shows the operating status (stand-by or active).
Intelligent circuit design with microcontroller able to 96 kHz Input impedance 50 k Maximum Amplification 18 dB
Two stereo audio inputs for two sound sources (RCA) Audio connections — Headphone socket, 1 Line output
Output power 100 mW / 600, 170 mW / 250 ¿. 150 mW / 30 v —
T.H.D. 0.001% at 170 mW / 250 — Mica capacitors only; no ceramic capacitors As a result of their generation of voltage under stress
Very reliable cooling concept; including permanent short circuit protection at the output