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The Alpha Amplifier System from AER is a 40W amplifier with an 8" twin-cone speaker system. It has one channel and two independent input stages (line and microphone/line). The triple-band equalizer of your Alpha provides you with an active sound interaction tool that supports the natural tone of instruments and voice whilst simultaneously offering you the possibility of a controlled accentuation.
The Alpha has a built-in (internal) reverb effect. The EFX level control determines the intensity of the internal effects. A standard double footswitch (on/off switch) can be plugged into the footswitch socket on the rear side of the amplifier via a stereo cable. The footswitch allows you to switch the internal and external effects on and off.
Microphones requiring 48V phantom power can be directly connected to the XLR socket of input 1. Factory-provided phantom power is activated but if required, may be deactivated by an internal jumper. In contrary 9V phantom power, if required, can additionally be activated in input 2 by an internal jumper.
Switchable line or microphone input Combo socket, XLR + 1/4" phone jack
Line Mode (Jack Only): Unbalanced high-impedance input for instrument pickups and line-level sources Minimum Input Voltage: 16 mV (-36 dBV) Maximum Input Voltage: 7 V (+17 dBV) Input Impedance: 2 MOhms, 300 pF Equivalent Input Noise, A-Weighted: 2.1 µV (-114 dBV)
Microphone Mode (Jack or XLR) XLR (balanced), stereo jack (balanced), or mono jack (unbalanced) microphone input Minimum Input Voltage: 2 mV (-54 dBV) Maximum Input Voltage: 1 V (0 dBV) Input Impedance (Balanced): 1.2 kOhms Input impedance (Unbalanced): 2.7 kOhms Voice Filter: -10 dB at 260 Hz (ref. to 10 kHz) Equivalent Input Noise, A-Weighted: 0.7 μV (-123 dBV) Phantom Power: 48 V (XLR only), R = 6.8 kOhms per terminal, total current max. 10 mA, short circuit protected.
Unbalanced high-impedance input for instrument pick-ups and line-level sources 1/4" mono phone jack Minimum Input Voltage: 14 mV (-37 dBV) Maximum Input Voltage: 5 V (+14 dBV) High / Low Switch: Attenuator -10 dB Input Impedance: 2.2 MOhms, 300 pF Equivalent Input Noise, A-Weighted: 1.2 μV (-118 dBV)
Return input for effect loop 1/4" mono phone jack Minimum Input Voltage: 150 mV (-17 dBV) Maximum Input Voltage 5 V (+14 dBV) Input Impedance: 20 kOhms (5 kOhms if effect is switched off by footswitch)
Headphones output. Suitable for headphones with stereo jack. Does not work with mono jacks. When plugged in, the internal speaker is switched off 1/4" stereo phone jack, L/R connected Maximum Output Power: 2 x 65 mW/1000 Ohms Input Sensitivity for 2 x 50 mW/1000 Ohms: 19 mV (-35 dBV) at input 1, line mode
Preamplifier output after master volume 1/4" mono phone jack Output Voltage: 1.4 V (+3 dBV)