Alfatron PA2B – Mini Amplifier(Class D)
The ALF-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 is a good application in different spaces, including classrooms, small meeting rooms, lecture halls, bars, pubs, etc.
Product Features
- 2 x 20 Watt @ 4 0hm as the default amplifier output
- Bridge connection function. Users can switch the PA2B to be 1 x 40 Watt @ 8 0hm by bridge connection
- Two stereo audio inputs, switchable by panel button, IR remote and RS232
- Volume / Bass / Treble controllable by panel buttons IR remote and RS232
- MIC port can support balanced/unbalanced signal, suppresses the external noise effectively. Line audio output via 3.5mm jack, with controllable volume
- 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. 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, a fan is not needed
- Anti-static case design: providing good protection for long-term and stable performance
Specifications
Audio Input | Audio Output | ||
Input | 2 stereo audio,
1 MIC |
Output | 1 amplifier,
1 stereo audio |
Input Connector |
2 RCA
1 3.5mm jack 1 pluggable terminal block (3P,3.81mm), |
Output Connector |
1 3.5mm jack
1 pluggable terminal block (4P, 5.08mm) |
Input Impedance | >10KΩ | Output Impedance | 50Ω/stereo, 4~8Ω/Amplifier |
Audio General | |||
Frequency Response | 20Hz ~ 20KHz | CMRR | >70dB@20Hz~20KH
z |
SNR | 80dB at maximum output | Bandwidth | 20Hz ~ 25KHz |
Stereo Channel
Separation |
>75dB@20Hz to 20KHz |
THD + Noise |
1%@1KHz,
0.3%@20KHz at nominal level |
Voltage Gain | 32dB | Power Output | 2×20 Watts (4 Ohms) |
Control Function | |||
RS232 Control | 3-hole phoenix connector | Panel Control | Optional button control |
IR Remote | Optional IR remote |