Compact-sized Digital Amplifier (Class-D) with 3 Inputs

Model: ALF-PA2B

2 x 20 Watt at 4 ohm as the default amplifier output.
Bridge connection function. User can switch the PA2B to be 1 x 40Watt at 80hm by bridge connection.
Two stereo audio inputs, switchable by button, IR remote and RS232.
Volume /Base/Treble controllable by buttons IR remote and RS232.
MIC port can support balance/unbalance signal, suppress the external noise effectively.

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The PA2B is a compact-sized digital amplifier (Class-D) with 3 inputs (2 lines in and 1 balanced MIC). It is integrated with powerful functions, including bridge connection, dual-mono, EQ control, microphone mixer etc. It has a good application in different places, including classroom, small meeting room, lecture hall, bar, pub etc.

2 x 20 Watt at 4 ohm as the default amplifier output.
Bridge connection function. User can switch the PA2B to be 1 x 40Watt at 80hm by bridge connection.
Two stereo audio inputs, switchable by button, IR remote and RS232.
Volume /Base/Treble controllable by buttons IR remote and RS232.
MIC port can support balance/unbalance signal, suppress the external noise effectively.
Line audio output at 3.5mm jack, with volume controllable.
Dual-mono up the stereo audio to two times mono audio.
MIC mixer function. The microphone will be mixed to the line audio output, and be controlled separately.
MIC input supports 48V phantom power, dynamic MIC and Wireless MIC.
Auto noise gate. It keeps detecting the audio and MIC input, will mute the output when there is no input.
Ultra low inrush current, no need for power sequencing and this allows multiple PA2B to be powered on simultaneously without overloading power circuits.
Convection cooled, the fan is not needed.
Anti-static case design: providing good protection for long-term and stable performance.

Amplifier Type - Other
Spec Sheet available - Yes

Audio Input: 2 stereo audio, 1 MIC
Input Connector: 2 RCA, 1 3.5mm jack, 1 pluggable terminal block (3P, 3.81mm)
Input Impedance: >10 kohm
Audio Output: 1 amplifier, 1 stereo audio
Output Connector: 1 3.5mm jack, 1 pluggable terminal block (4P, 5.08mm)
Output Impedance: 50 ohm/Stereo, 4 - 8 ohm/Amplifier
CMRR: >70dB at 20Hz to 20KHz
SNR: 80dB at maximum output
Bandwidth: 20Hz to 25KHz
Stereo Channel Separation: >75dB at 20Hz to 20KHz
THD + Noise: 1% at 1KHz, 0.3% at 20KHz at nominal level
Voltage Gain: 32dB
Power Output: 2x20 Watts (4 Ohms)
RS232 Control: 3-hole phoenix connector
Panel Control: Optional button control
IR Remote: Optional IR remote
Maximum Frequency Response (Bandwidth): 20 kHz
Maximum Frequency Response (Bandwidth): 20000 Hz
Minimum Frequency Response (Bandwidth): 20 Hz
Minimum Frequency Response (Bandwidth): 0.02 kHz
Impedance: 10 ohm
Number of Inputs: 3
Total Harmonic Distortion + Noise (THD+N): 1 %
Warranty: 7 years / limited

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Compact-sized Digital Amplifier (Class-D) with 3 Inputs

Model: ALF-PA2B

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