Audio Database

AU-1100
Commentary

A pre-main amplifier with the same audio concept as the AU 3300.

All stages are directly connected to OCL pure complimentary service circuit.
In the first stage, a dual transistor with uniform characteristics and excellent stability is used as a differential amplifier.

The equalizer section uses a 2-stage direct-coupled circuit with carefully selected low-noise transistors at the first stage.

The tone control section uses a 10-step click-stop system.
The circuit configuration is composed of a 2-stage direct-coupled tone amplifier and a CR-type circuit to obtain simple characteristics.

Equipped with a microphone mixing circuit with adjustable level.
Mixed sound can be retrieved from the recorded output.

Equipped with two speaker outputs.

± 2 power supply system is adopted, and click noise generated at switch switching is reduced.

One touch push button type is adopted for the input selector.

It is equipped with functions such as high filter, loudness, tape monitor, mode switching, and headphone jack.

Model Rating
Type Pre-main amplifier
Effective power 22W + 22W (8 Ω, both channel operation, 40 hz to 20 khz)
25W + 25W (8 Ω, both channel operation, 1 kHz)
28W + 28W (8 Ω, single-channel operation, 1 kHz)
Music power 84W (4 Ω, 1 kHz)
Total harmonic distortion factor Not more than 0.15%
Intermodulation Distortion Factor (70 Hz : 7 kHz = 4 : 1, SMPTE) 0.2% or Less (Rated Output)
Power Band With (IHF) 10 Hz ~ 40 kHz (8 Ω)
Frequency Response (at 1W) 10 Hz ~ 40 kHz + 0.5 -1.5 dB
RIAA deviation (30 Hz to 15 kHz) ± 0.5 dB
Damping factor 50 (8 Ω)
Input Sensitivity / Impedance Phono : 2.5mV/50k Ω
Mic : 2.5mV/10k Ω
Tuner, Aux, Tape Monitor : 130mV/50k Ω
Phono maximum allowable input 200 mv (1 khz, THD0.2% or less)
Output Voltage (1 kHz) Tape Rec(Pin):100mV
Channel Separation (1 kHz) Phono : 60 dB or more
Tuner, Aux, Tape rec : 65 dB or higher
Hum and noise Phono : 75 dB or more
Mic : 65 dB or more
Aux, Tuner, Tape Monitor : 90 dB or higher
Tone control Bass : ± 12 dB (50 Hz)
Treble : ± 12 dB (15 kHz)
Loudness (at Volume-30dB) + 10 dB at 50 Hz, + 8 dB at 10 kHz
High filter -3dB (7 kHz), 6dB/oct.
Power consumption 58W (rated)
156W maximum
External dimensions Width 400x Height 120x Depth 240 mm
Weight 5.5kg