Sure Electronics 2x50W TDA7492 Class-D Amplifier Board

Brand:|Model: AA-AB32174
The Class D amplifier topology makes this 2 x 50W amplifier board efficient and consume less space than traditional solid state amplifiers.
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List Price$29.99
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Part # 320-301
  • 2 x 50W Class D amplifier
  • Small footprint for space limited applications
  • Built-in cooling fan, pop noise suppression, and over-temp protection circuit
  • 14 to 27 VDC power supply required

Product Details

Sure Electronics 2x50W TDA7492 Class-D Amplifier Board

This amplifier board features a state-of-the-art, dual channel Class-D TDA7492 IC, which delivers up to 50 watts per channel. The small 3.6" wide by 4.8" long footprint allows this amplifier board to be used in many applications were size constraints limit the use of conventional amplifiers. Just add a 14 to 27 VDC power supply, signal source, and speakers!

A low noise cooling fan is mounted atop the robust heatsink to maximize heat dissipation. Thermal protection is also included to extend the longevity of the amplifier board. Four fixed gain settings are available to allow for volume control at the source, and stereo RCA line-level inputs are pre-attached. Mounting holes are provided as is a 2.5 mm x 5.5 mm power jack for quick connection. Screw-down phoenix-type terminals are included for quick speaker wire connection.

• Class D amplifier topology featuring TDA7492 amplifier IC
• Heatsink with attached fan
• Pre-drilled mounting holes
• Over-temperature protection circuit
• Click and pop noise suppression
• Phoenix-type speaker terminals
• Line-level RCA input

• Power output (w/ 24 VDC power supply): 50W x 2 (6 ohms, THD 10%), 40W x 2 (8 ohms, THD 10%), 25W x 2 (6 ohms, THD 0.05%), 20W x 2 (8 ohms, THD 0.1%)
• Frequency response: 20 to 20,000 Hz (±3 dB)
• Minimum impedance: 4 ohms
• Recommended power supply: 14 to 27 VDC, 6A regulated
• Fixed gain settings: 25.6 dB, 31.6 dB, 35.1 dB, 37.6 dB
• Power input jack: 2.5 x 5.5 mm, center-positive
• Dimensions: 4.8" L x 3.6" W x 1.4" H

Sure Electronics 2x50W TDA7492 Class-D Amplifier Board
  • BrandSure Electronics
  • ModelAA-AB32174
  • Part Number320-301
  • UPC844632096679
  • Product CategoryAudio Amplifier Boards & Modules
  • Unit of MeasureEA
  • Product Rating
    (14 Reviews)
  • Weight0.6 lbs.
  • California Prop 65

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

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Sure Electronics 2x50W TDA7492 Class-D Amplifier Board
Sure Electronics 2x50W TDA7492 Class-D Amplifier Board is rated 4.3571 out of 5 by 14.
Rated 1 out of 5 by from Poor sound quality, unreliableThis amp hissed badly, even after attempts to filter out any ground loop contamination. It stopped functioning completely after only a week.
Date published: 2015-09-22
Rated 5 out of 5 by from Plenty of juice for my bookshelf speakersI've got this amp running a pair of 4 ohm bookshelf speakers and it works great. I've monitored the temperature and it barely gets warm after a couple hours of playback at moderate volume. One thing to note is that the fan will continue to run even when if the amp is put into standby mode.
Date published: 2015-03-03
Rated 5 out of 5 by from Works just fine!Arrived sooner than I expected. Using it to power external speakers for my new flat screen TV. Put a 100k pot between amp and TV for safety. Powering it with a 20 volt 4.5 amp laptop power brick. Amp and brick housed in a plastic project box with a lot of holes drilled in for vents. Sounds just great. I wouldn't hesitate to buy another. And the price can't be beat.
Date published: 2015-02-24
Rated 5 out of 5 by from Small but powerfulI purchased this amp for a custom portable speaker install. It works great and is very easy to wire. Sound is very clear. Just hook up power, RCA inputs, and a speaker. Will work with any source with RCA outputs (ie. 3.5mm to RCA headphone wire, DVD player, etc.)
Date published: 2014-09-24
Rated 5 out of 5 by from Great board and featuresMet all expectations, a nice little amplifier board. I have not been able to test for actual output but so far it is not lacking.
Date published: 2014-06-18
Rated 3 out of 5 by from stoped workingIt was a great amp. I had it for about a year and it just stopped working one day. Cant seem to figure out whats wrong with it. This is the second amp that stopped working that i bought from this site.
Date published: 2014-04-30
  • 2015-10-13T06:31CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_14
  • loc_en_US, sid_320-301, PRD, sort_mostRecent
  • clientName_PartsExpressInternational

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  for a prompt reply.
Sure Electronics 2x50W TDA7492 Class-D Amplifier Board

Hi guys can i use this class-d amp with the recomended power power a Dayton Audio B652?

Asked by: Ej32
Answered by: MattP
Date published: 2015-10-08

How do I add a volume control knob to this board?

Asked by: Myronus101709
Gotta disagree with MattW on this.Putting a pot on the outputs would quickly destroy the pot and possibly be harmful to the amp, itself. AnL-pad, which is designed for controlling speaker volume would theoretically work when connected to the output stage, but controlling the amp output is more appropriately accomplished by using a pot at the amp INPUT.
Answered by: cbrillow
Date published: 2015-08-27

I plan on using two SLA 12v batteries for 24v, what gauge wire should I use to connect the batteries to the amp? 20, 18, 16, 14, 12 Gauge?  On another build i will be using a 2x25 amp with a 12v SLA, what gauge hookup wire for this one?

Asked by: Amp Question
16 gauge wire will be all that is necessary for either of these applications.
Answered by: MattP
Date published: 2015-07-02

I put a low pass filter on the input but the sounds still contains highs. Does the amp have something that would interfere with the low pass signal? Trying to use for a small subwoofer

Asked by: Jeep21
Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-06-23

What would happen if I hooked up a 12v 30A power supply instead of a 14v 6A supply?

Asked by: bcboyz86
Nobody answered so I'll take a shot. The specifications state 14v minimum, so I suspect your 12v supply would not work well, if at all. The 30A would not be a problem since the amplifier would only draw what it needs, but your power supply may consume additional/unnecessary electricity because of its excessive capacity. In any case, without at least 14v I think you're out of luck.
Answered by: martinmarty
Date published: 2015-05-18

can you run at set of bookshelf speakers that are 4ohm each off this amp using a 24volt 6amp power supply?

Asked by: ericG
Yes that will be fine.
Answered by: MattP
Date published: 2015-02-11
  • 2015-10-13T07:53CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_50
  • loc_en_US, sid_320-301, PRD, sort_recentQuestionsFirst
  • clientName_PartsExpressInternational


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