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Alfatron PA2B 2 x 20W Compact Digital Amplifier

BH #ALFPA2B • MFR #ALF-PA2B
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Alfatron PA2B 2 x 20W Compact Digital Amplifier
Key Features
  • Two Line Inputs and One Mic Input
  • 2 x 20 Watts at 4 Ohms
  • Provides 48V Phantom Power
  • Anti-Static Chassis Design
Amplify audio content to provide atmosphere and ambience in your classroom, retail store, lecture hall, coffee shop, pub, or restaurant with this PA2B Compact Digital Amplifier from Alfatron. The PA2B is a compact, digital class-D amplifier with two line inputs and one balanced mic input.
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Alfatron ALF-PA2B Overview

Amplify audio content to provide atmosphere and ambience in your classroom, retail store, lecture hall, coffee shop, pub, or restaurant with this PA2B Compact Digital Amplifier from Alfatron. The PA2B is a compact, digital class-D amplifier with two line inputs and one balanced mic input.

Bridge connection, dual-mono, mic mix, and EQ control are among the vast powerful functions of the device, which also provides 48V phantom power through a mic input that supports dynamic and wireless mics as well as 48V phantom power for condenser microphones. Encased in an anti-static chassis, the PA2B is sturdy and well protected for long-term use and overall stability.

Key Features
  • 2 x 20 watts at 4 ohms as the default amplifier output
  • Bridge connection function allows users to switch the PA2B to be 1 x 40 watts at 8 ohms
  • Two stereo audio inputs, switchable by button, IR remote, and RS-232
  • Volume / Bass / Treble controllable by buttons, IR remote, and RS-232
  • Mic port can support balanced/unbalanced signal
  • Line audio output at 3.5mm jack with volume control
  • Dual-mono up the stereo audio to two times mono audio
  • Mic mixer function allows microphone to be mixed to the line audio output and be controlled separately
  • Mic input supports condenser mics with 48V phantom power as well as dynamic and wireless mics
  • Auto noise gate keeps detecting the audio and mic input, muting the output when there is no input
  • Convection cooling
  • Anti-static chassis design
UPC: 781159971051

Alfatron ALF-PA2B Specs

Key Specs
Number of Channels
3 Input
Amplifier Power Rating
20 W per Channel
40 W Bridged
DSP
Yes
Audio I/O
1x Stereo RCA TS Line Input
1x 1/8" / 3.5 mm TRS Line Input
1x Block 3-Pin Balanced Mic Input
1x 1/8" / 3.5 mm TRS Line Output
Digital Audio I/O
No
Network I/O
No
Amplifier
Form Factor/Type
Wall-Mount
Number of Channels
3 Input
Amplifier Power Rating
20 W per Channel
40 W Bridged
Amplifier Class
Class-D
Performance
Frequency Response
Mic/Line Input to Amplifier:
20 Hz to 20 kHz
I/O Impedance
1/8" / 3.5 mm/RCA/Block Line/Mic Input:
> 10 Kilohms (Balanced or Unbalanced)
Max Gain
32 dB (at 4 Ohms)
VCA Control
Yes
SNR
80 dB
THD+N
1% (1 kHz)
0.3% (20 kHz)
CMRR
> 70 dB (20 Hz to 20 kHz)
Signal Processing
DSP
Yes
EQ
2-Band Shelving EQ
Connectivity
Audio I/O
1x Stereo RCA TS Line Input
1x 1/8" / 3.5 mm TRS Line Input
1x Block 3-Pin Balanced Mic Input
1x 1/8" / 3.5 mm TRS Line Output
Digital Audio I/O
No
Network I/O
No
Other I/O
1x Block 3-Pin RS-232 Input
1x 1/8" / 3.5 mm TS Remote
Speaker Outputs
1x Block 4-Pin Stereo 4-Ohm/8-Ohm Main
Number of Module Slots
No
Phantom Power
Yes
Media/Memory Card Slot
No
Power
AC Input Power
Universal:
100 to 240 VAC, 50 / 60 Hz
DC Input Power
24 VDC
Current Consumption
2.71 A
Power Consumption
45 W
AC Outlet
No
Physical
Certifications
CE, EAC, FCC
Operating Conditions
32 to 72°F / 0 to 40°C 
Storage Conditions
14 to 140°F / -10 to 60°C 
Dimensions
4.8 x 3.4 x 1.6" / 123.0 x 87.0 x 40.0 mm
Weight
1.5 lb / 0.7 kg

Alfatron ALF-PA2B Reviews

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