Description
A-48
The A-48 harnesses a wealth of technological know-how gained from higher-end models to realize significant advances in performance and sound quality. It is a pure Class-A stereo power amplifier that recreates the musical stage with amazing transparency. The signal input section employs the instrumentation amplifier principle and is designed for a high gain of 22 dB (multiplication factor approx. 12.5), resulting in an amazing S / N ratio of 117 dB. The power supply with large toroidal power transformer and massive 60,000 μF filtering capacitors, together with a power amplification stage using power MOS-FETs in a six-fold parallel push-pull architecture delivers ample output power of 360 watts into 1 ohm (music signals) and achieves a damping factor of 800. In bridged mode, the A-48 can be further upgraded to a monophonic power amplifier with an impressive output rating of 720 watts into 2 ohms (music signals). The output protection circuit reliably guards against any short-circuiting of the speaker terminals, for complete peace of mind. By eliciting the best possible sound from the speakers, this power amplifier makes musical perfection come alive in your listening room.
Continuous average output power:
45 W / ch (8 ohms), 90 W / ch (4 ohms), 180 W / ch (2 ohms), 360 W / ch (1 ohm, music signal) / Bridged operation: 180 W (8 ohms), 360 W (4 ohms), 720 W (2 ohms, music signal)
Frequency response:
0.5 Hz – 160 kHz +0, -3.0 dB
IM distortion:
0.01% or less
Damping factor 800 (EIA, 8 ohm load, 50 Hz)
S / N ratio:
117 dB (GAIN: MAX), 122 dB (GAIN: -12 dB) (A weighted)
Rated input:
0.76 V
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