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  • TEKVOX 78040 TEK PA2B Mini Amplifier TEKVOX 78040 TEK PA2B Mini Amplifier
  • TEKVOX 78040 TEK PA2B Mini Amplifier TEKVOX 78040 TEK PA2B Mini Amplifier

TEKVOX 81151-b Drop-In A/V Solution for HD Conference Rooms


TEKVOX 79033 1201-HD Presentation Switcher

TEKVOX 78040 TEK PA2B Mini Amplifier

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This item is shipped from our affiliate facility. The stock level is not under our control and is subject to change. We will contact those that order this item in the event of a problem. If this item is ordered together with other products, this item may be shipped separately and may arrive separately.


The TEK-PA2B is a compact Class-D amplifier with two selectable line inputs and one balanced MIC with selectable phantom power. It is integrated with powerful features including speaker bridging, stereo or mono selection, EQ control, a microphone mixer, and simple-to-program RS-232 control.

The TEK PA2B amplifier is great for classroom and training room amplification including speech reinforcement. With separate volume controls for the line inputs and the Mic input, it is easy to control a room level without feedback.


  • 2 x 20Watts @ 4 Ohm or Bridged to 40 Watts @ 8 Ohm
  • Stereo or Mono selection
  • Two stereo audio inputs selectable by button IR* remote and RS232
  • Volube/Bass/Treble controllable by buttons’ IR* remote and RS232
  • Balance microphone input with selectable 45V phantom power, mic, or line settings
  • Separate volume control for line level sources and microphones
  • Loop output after-volume control to connect other TEK-PA2Bs or another amplifier
  • Auto noise gate to reduce noise on mic input
  • Extensive RS232 control using simple ASCII commands

*IR remote is optional.



In this application, there are two different selectable music inputs and a microphone input which are all controlled by the TekTouchPad. A second TEK-PA2B is added to connect a second group of speakers. Since the Loop output is after the volume control, adding another amplifier is easy. Any change of the volume level will also control the level of the second amplifier.

78040 Diagram

Device Specifications


TEK-PA2B  (78040)


2 stereo audio - unbalanced,

1 MIC - balanced

Input Connector

Line 1 - 2 RCAs

Line 2 - 1 3.5mm jack

MIC 1 captive screw connector (3P,3.81mm)

Input Impedance


Frequency Response

20Hz ~ 20KHz


80dB at maximum output

Stereo Channel Separation

>75dB@20Hz to 20KHz



Voltage Gain



1 amplifier,

1 stereo audio (Loop)

Output Connector

Loop - 1 3.5mm jack

Amp - 1 captive screw connector (4P, 5.08mm)

Output Impedance

50Ω/stereo, 4~8Ω/Amplifier

THD + Noise

1%@1KHz, 0.3%@20KHz at nominal level

Power Output

2x20 Watts (4 Ohms)

40 Watts Bridged (8 Ohms)


-5 to +35 C,  -41 to +95 F

RS232 Control Connector

3-hole phoenix connector


24V 2.5A


W: 4.8” / H: 1.5” / D:.3.4”


0.64 lbs.

*Specifications are subject to change without notice.

Additional Information

SKU 78040
Model TEK-PA2B
Manufacturer TEKVOX

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