ATC SPA2-150

Commentary

A stereo power amplifier designed based on a high-fidelity amplifier designed for active speakers.

The circuit was designed by Tim Isaac, General Manager of Engineering Department of ATC, and is composed of discrete elements in all stages, and FET is used in the power stage, making the circuit excellent in transient characteristics and phase characteristics.

The power stage is constantly monitored by a microcomputer, which controls the operating temperature and DC offset to ensure stable operation. This system also protects the loudspeakers and speakers in the event of malfunction.

The power supply consists of twin monaural with a power transformer for each channel.

Both balanced and unbalanced inputs are supported.

Model Rating

Type	Stereo power amplifier
Maximum power output	150W + 150W (8 Ω, when both channels are driven)
Frequency characteristic	5 Hz to 50 kHz ± 0.1 dB
Total harmonic distortion factor	95 dB or less
Input Sensitivity / Impedance	Balanced : 1V/34k Ω Unblanced : 2V/10k Ω
Signal-to-noise ratio	110 dB or more
Crosstalk	100 dB or more
Pwer	100 VAC, 50Hz/60Hz
External dimensions	Width 440x Height 146x Depth 426 mm
Weight	26kg