Aurex SB-320

Commentary

A pre-main amplifier that uses a discrete power amplifier.

The circuit system of the main amplifier section uses a pure complimentary service OCL circuit directly connected to all stages. The power transistor is driven by a single push-pull operation, so that there is room for maximum output.

The tone control amplifier section is CR type and consists of two stages directly connected.

The power supply section uses a one pack capacitor with two power supplies of 10,000 μ Fx2.

The volume control uses a volume with a 41-point mechanical click.

Built-in audio muting circuit.

It has a duplicate switch that can copy between two decks.

Equipped with a panel handle.

Model Rating

Type	Pre-main amplifier
Circuit system	Pure complimentary service OCL circuit directly connected to all stages
Power Amplifier Unit
Output (both channel drive)	Continuous output (1 kH) : 20 Hz to 20 kHz output : 42W + 42W (8 Ω) 50W + 50W (4 Ω) 40W + 40W (8 Ω) 48W + 48W (4 Ω)
Harmonic distortion factor	0.2% or Less (Continuous Output) 0.05% or Less (at 1W Output)
Cross modulation distortion factor	0.2% or Less (Continuous Output) 0.05% or Less (at 1W Output)
Output Bandwidth (IHF)	5 Hz ~ 60 kHz (8 Ω)
Damping factor	25
Residual noise	0.5 mv (8 Ω)
Preamplifier Section
Input Sensitivity / Impedance	Phono : 2.5mV/47k Ω Aux, Tuner, Tape : 150mV/47k Ω
Recorded output	Tape rec:150mV DIN:30mV
Equalizer allowable input	MAG : 230 mV (RMS, 1 kHz)
RIAA deviation	± 0.5 dB
Signal-to-noise ratio (IHF)	Phono:70dB Aux, Tuner : 90 dB
Frequency characteristic	7 Hz to 50 kHz ± 1 dB
Tone control	Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz)
Filter	Low : 20 Hz, -6dB/oct.
<General>
Semiconductor used	Transistor : 30 Diode : 16 pcs LED : 1
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption	80W
External dimensions	Width 400x Height 146x Depth 322 mm
Weight	10kg