HEADPHONE AMPLIFIER AMP-02
1. GENERAL DESCRIPTION
Headphone amplier is a device made for listening to audio signals
using Hi-Fi headphones with 6,3 mm Jack plug.
Amplier’s and power supply’s casings were designed and made
of solid, high quality aluminum blocks.
AMP-02 is equipped with delayed headphone start system,
which was opmized and improved for this model (compared to
AMP-01). The device is ready to operate aer few seconds aer
switching on.
The device is powered by PS-AMP01 power supply of safe
16 V AC voltage, which guarantees opmal parameters.
Construcon of our amplier is an unique version of class A
amplier with reproducon of arcial mass and work mode
typical for valve ampliers. AMP-02 was designed to play music
of following genres: Opera, Classical music, Jazz, Rock, POP. It can
cooperate with line signal devices such as CD, Tuner, DAT, tape
recorder or work directly with analog Hi-Fi turntables (MM and
MC cartridges). In Phono mode for MC cartridges an addional
separate amplier stage is used in which Global Negave
Feedback Loop (Non Global NFB) is not used. The device is
equipped with impedance match selector for MC cartridges from
various manufacturers. The amplier was made with two single,
separated mono channels with separate power supplies for le
and right channel. Assembly of all electronic components is hand-
made with through-hole technology, one excepon is MC stage.
All electronic components were selected and paired by hand.
Process of selecng and seng up the components was based
on compability with most popular headphones by brands such as
Sennheiser (HD-600, HD-800), AKG (Q701,812), Audeze (LCD3,
LCD4), Final Audio Design (Pandora Hope IV, VI).
ADDITIONAL FUNCTION!
AMP-02 may also work as a Phono MM/MC preamplier. This
variant allows connecon of a turntable with a transistor power
amplier, tube amplier, AV amplier, and a reel-to-reel tape
recorder. Signal output can be derived from headphone output
jack via Jack Stereo/RCA Stereo connector (not included) –
connecon scheme Fig.2.
In preamplier mode output level of AMP-02 signal can be
adjusted with volume knob, it’s directly connected to signal’s
harmonic saturaon. This seng allows user to slightly aect
the sharpness or soness of the sound. Adjustment range is
between „hour” 9 and 14 of the volume knob.
Bare in mind that selecon of wiring can signicantly improve
quality of the sound.
