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Stereo 2 x 150mW Class AB LM4881 Headphone Amplifier Board

Brand:| Model: AA-AB32261
Overview
Step up the output of your smartphone to drive high impedance headphones with this Class AB headphone amplifier board. The LM4881 IC is used to provide up to 15.7 dB of high quality gain to power even the most power hungry headphones.
Highlights
  • High quality Class AB output that uses the LM4881 Boomer IC
  • Up to 150 mW of power per channel (15.7 dB of gain)
  • Able to drive 8 ohm speakers
  • Operates on 8 to 24 VDC
Part # 
320-321
Weight: 0.1062 lbs.  
IN STOCK
List Price$14.99
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$8.83
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Part # 320-321
Qty:  EA
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Product Details

Stereo 2 x 150mW Class AB LM4881 Headphone Amplifier Board

This compact, self-contained headphone amplifier board is built around the Texas Instruments designed LM4881 Boomer® dual headphone amplifier IC. The LM4881 features high quality, Class AB output (up to 15.7 dB of gain) with minimal components and is able to operate with a wide array of power supplies from 8 to 24 VDC without the need for a heat sink.

Additional to its use as a headphone amplifier, this amplifier board may also be used as a preamplifier or a small loudspeaker power amplifier, with output of up 150 mW per channel at 8 ohms. An exceptionally low total harmonic distortion and noise rating of 0.1% @ 150 mW into an 8 ohm load ensures clean output with lower impedance loads. Distortion and noise are even lower for high impedance headphone loads; 0.02% @ 75 mW into a 32 ohm load.

Locations for the addition of screw-down wire terminals are provided for signal inputs and power outputs. A two-conductor screw-down terminal is included for power supply connection. See related items for two-conductor screw terminals. Gain settings are provided for each channel, as-is stereo 3.5 mm input and output jacks, as well as a 2.1 x 5.5 mm DC power jack.

Features and Specifications:
• Input power requirements: 8 to 24 VDC, 500 mA (minimum recommended current capacity)
• Powre output: 150 mW @ 8 ohms (0.1% THD+N), 120 mW @ 16 ohms (0.025% THD+N), 75 mW @ 32 ohms (0.02% THD+N)
• Frequency response: 20 to 20,000 Hz (±3 dB)
• Gain settings: 9.6 dB (low), 15.7 dB (high)
• Input impedance: 1.7k ohm (with gain set to high), 3.3k ohm (with gain set to low)
• Thermal shutdown protection circuitry built-in
Dimensions: 3" L x 2" W x 5/8" H 



Stereo 2 x 150mW Class AB LM4881 Headphone Amplifier Board
  • BrandParts Express
  • ModelAA-AB32261
  • Part Number320-321
  • UPC848864012216
  • Product CategoryHome Audio Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (1 Reviews)
  • Weight0.1062 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Reviews

Stereo 2 x 150mW Class AB LM4881 Headphone Amplifier Board
Stereo 2 x 150mW Class AB LM4881 Headphone Amplifier Board is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Just what I neededI built a passive headphone crossfeed filter to simulate listening to speakers, but I needed to boost the output. This amp did the trick. It is well made and easy to hook up, and it sounds great with my headphones.
Date published: 2014-02-08

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
Stereo 2 x 150mW Class AB LM4881 Headphone Amplifier Board

Will this work as a preamp for a cheap mic to use with the pam8610 board since it you can't hear the unpowered mic just plugging it in to the pam8610? thanks

Asked by:

Is it possible to power this board from a 9 Volt Battery using an adapter that connects the battery to the dc input?

Asked by: djlovell
Yes a 9 volt battery will power this device but the battery live may be fairly short due to the low storage capacity of a 9 volt battery.
Answered by: MattP
Date published: 2014-08-04

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