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he A1 is built around a completely discrete and symmetrical Class A topology. It‘s able to output 25W of pure Class A power @ 8 ohms load with 25A of maximum output. While the numbers here might seem rather low, the ability for the output stage to drive difficult speakers is a small miracle in itself. The amp design being dynamic class A, and if Class A standing current is exceeded, it will automatically allow more. It therefore “slides” (NOT “switches”) smoothly into class B style operation, temporarily allowing the further current draw needed.Power SupplyThe new A1 has received an updated transformer from shared (1985 original) to more efficient “dual mono split rail” windings. The amp stages are supplied by fully independent left and right power supplies for better power handling and stereo imaging and each power amplifier now has double supply capacity resulting in reduced ripple and noise.The transformer‘s noise and heat dissipation are reduced due to better efficiency and updated components. The main supplies are filtered for better regulation and reduced switch on surge.Read More
Amplifier Power: 25 Watts per channel into 8 Ohms Voltage: 42.5 Volts peak to peak Current: 25 Amps peak to peak Damping Factor: 150 Gain (volume max): 32dB (Direct Mode), 42dB (Normal Mode) Output devices: 2 per channel Signal / noise ratio: 82dB Channel separation: 85dB Frequency response: + 0, –1dB, 10Hz to 40 kHz Line level sensitivity: 300mV rms nominal, 8V rms max Line level inputs impedance: 25k Ohms Tape Out impedance: 220 Ohms Pre Out impedance: 100 Ohms Phono Preamp Phono RIAA response: +/- 1dB MM sensitivity: 5mV nominal MM capacitance / impedance / gain: 100pF / 50k Ohms / 40dB MM signal / noise ratio: 75dB MC sensitivity: 450μV nominal MC impedance / gain: 1k Ohm / 60dB MC signal / noise ratio: 70dB Inputs 1x phono RCA MM/MC, 5x line RCA Outputs 1 x line level RCA fix TAPE OUT 1 x line level RCA var PRE OUT 1 x 4mm banana/binding posts SPEAKER OUT General Information Dimensions (WxHxD): 440 x 68.3 x 283.3 mm Main voltages: 230V/115V Internally set or 100V optional Max. Consumption: 130W, 0W in standby (=Power Switch OFF) Weight: 10.5kg