Audes ATA-134 Stereo Tube Amplifier

ATA-134 is a stereo tube amplifier, which employs EL34 tubes working in triode mode. The amplifier operates in Class AB without using negative feedback. ATA-134 was designed from scratch and benefits from the use of custom-made transformers designed and manufactured by Audes, including separate filament and High Tension anode toroidal core types with precise winding sectioning and low primary current. Special split-tape-wound-core output transformers, which employ thin high-quality steel, were developed specifically for the ATA-100 tube amplifier series. Only high-quality selected components are used: all resistors are carbon film, and audio circuit capacitors are of PIO (paper in oil) type produced by Jensen.

Technical Specifications

Rated continuous output power	15 W + 15 W (0 dB) Class AB
Frequency range	20–20000 Hz −1.0 dB
Total harmonic distortion	<1%
Signal-to-noise ratio	>90 dB
Input sensitivity	1.1 V
Number of inputs	2
Input impedance	50 kΩ
Loudspeaker impedance	4–8 Ω
Recommended loudspeaker sensitivity	87 dB/1 W/1 m
Tubes in the preamplification stage	6N1P-EV (Vene: 6Н1П-ЕВ) × 2 tk
Tubes in the power amplification stage	EL34 × 4 tk
Dimensions (mm)	250 H × 460 W × 380 D
Dimensions (inches)	9⅞" H × 18⅛" W × 15" D
Weight	18 kg/40 lb