2x25W at 4 Ohm TDA7492 Class-D Audio Amplifier Board Only

Brand:| Model: AA-AB32165
Choose this 2 x 25 watt amplifier board to power your next speaker project. A Texas Instrument's Class D TDA7492 amplifier chip is employed to produce high fidelity sound efficiently.
  • Pre-assembled, pre-tested
  • Superb sound quality
  • Perfect Class D architecture
  • Two channels—each up to 25W
  • Up to 90% efficiency
  • Does not require a heat sink for most applications
  • Line level analog audio input
Part # 
Weight: 0.65 lbs.  
List Price$39.95
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Buy 4-up$18.50
Part # 320-332
Qty:  EA
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Product Details

2x25W at 4 Ohm TDA7492 Class-D Audio Amplifier Board Only

This Class D dual channel amplifier board employs a Tripath-style Texas Instruments TDA7492 chip. Each channel is rated at 25W, delivered with state-of-the-art sound quality. The TDA7492's efficiency eliminates the need for an external heat sink when playing music under average listening conditions. Integration of high-quality capacitors ensures hi-fi amplification output. Requires a DC power supply ranging from 14 to 19 VDC (available separately) and can be used to drive any 4 ohm or 8 ohm passive speakers. Gain control is accomplished by setting two DIP switches, and there are four gain modes available: 24.6 to 26.6 dB, 30.6 to 32.6 dB, 34.1 to 36.1 dB, and 36.6 to 38.6 dB. .

• Output power (x 2 channels): 20W @ 8 ohms (15 VDC <0.08% THD+N), 25W @ 6 ohms (15 VDC <10.0% THD+N) 
• Frequency response: 20 Hz to 20 kHz (±3 dB)
• Signal to noise ratio: 100 dB (A-weighted)
• Power supply range: 14 to 19 VDC
• Gain settings: 24.6 to 26.6 dB, 30.6 to 32.6 dB, 34.1 to 36.1 dB, and 36.6 to 38.6 dB
• Input impedance: 48K ohm minimum, 60K ohm typical
• Input sensitivity: 640 mV @ 25.6 dB, 320 mV @ 31.6 dB, 210 mV @ 35.1 dB, 160 mV @ 37.6 dB
• Dimensions (mm): 110.2 L x 68.6 W x 16 H

2x25W at 4 Ohm TDA7492 Class-D Audio Amplifier Board Only
  • BrandParts Express
  • ModelAA-AB32165
  • Part Number320-332
  • UPC844632099205
  • Product CategoryAudio Amplifier Boards & Modules
  • Unit of MeasureEA
  • Product Rating
    (11 Reviews)
  • Weight0.65 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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2x25W at 4 Ohm TDA7492 Class-D Audio Amplifier Board Only
2x25W at 4 Ohm TDA7492 Class-D Audio Amplifier Board Only is rated 4.6364 out of 5 by 11.
Rated 4 out of 5 by from Nice Amp....Wrong Dims.This amp is very similar to the now discontinued TPA3123 (320-302). As such this is a nice little amp with nice clarity and power. It does lack the connectivity of the TPA3123 ie. RCA ins etc.. My main complaint is that these amps are listed with the same dimensions even though this amp is larger in all respects. LxHxW are approximately: + 15mm, 6mm, 10mm respectively. Not a big deal unless you plan to replace that old model with this new one in an existing project box as I was.
Date published: 2014-06-12
Rated 3 out of 5 by from 25wpc Digital ampThis unit is a small very basic audio amp. I have never played with one of these before, and I wanted to do a small audio project for the kids...The directions are basically enough to get you going, and very lacking in details..as to what type, and rating of power supply to use. ( it is translated from Chinese, so don't expect much) For my project I used a 12vdc 8.3A switching PS. It seems to work fine. One thing (very) lacking is any form of rudimentary volume control, I'm using a (PE) bluetooth receiver that has its volume via the bluetooth commands... An accessory volume kit would make this unit "MUCH" better and more useful for other audio projects.. 3 stars
Date published: 2014-01-23
Rated 5 out of 5 by from Great little ampThis little amp board surprised me.  I play around a lot with home and pro audio equipment.  I built a self powered speaker box to play music from my phone.  Used this amp board, 19v laptop power supply, and speakers/crossovers from a JBl outdoor speaker box.  Built a box for it out of MDF and sounds great.  Putts out a lot of volume from a cell phone input.  Would be nice to be able to adjust your tone/EQ before the input, but over all very happy.  Sounds even better with Ipod that has EQ options.  Nice and small, easy to hook up.
Date published: 2013-12-31
Rated 5 out of 5 by from Perfect to embed in a cabinetLately, I have been doing a lot of 1970's era floor cabinet refurb jobs for friends... and their friends... and their friends.These amp boards are the ideal tool when I do the job. Here's what's getting people hooked:I take a well made cabinet, usually from the 1970s or 1980s. I gut the drivers and examine the crossovers. I usually end up replacing the crossovers and always replace the drivers.Enter the amp board. I install the amp board INSIDE the cabinet. Sometimes, I only use one channel and put a board in each cabinet and make an auxilary out terminal to add an additional speaker. Sometimes I wire the second channel to the second cabinet in a stereo setup.Then I put in a bluetooth receiver and feed it power; hook it to the board. Viola! These clean sounding, perfect little boards can be LOUD with the right speakers. And people LOVE having a set of retro looking, yet high tech, speaker cabinets to play music from their phone or tablet with.I highly suggest downloading the manual and printing yourself a copy for every amp board you buy. There are switches that can control volume and you'll learn a lot about this kind of amp, the different configurations for power, and possibly using the rotary encoder. You learn in general, by using the manual.My project isn't the only thing you can do with these amps. Use your imagination to make powerful, portable systems. Comb this site for enclosures and make a stand alone amp. You could use this for your extremely awesome 7.2 surround in an auxiliary position or for a different zone in your house. The limits to where these can go / be installed are endless! They are small and efficient.I often read reviews where people take point off for features. Well, this is a stripped down amp board. It's not going to have an EQ and seven inputs. That's not what it's for. I give it full marks in all categories because it is versatile, dependable, affordable and a ton of fun.One tip, get the right power supply. These things operate the way they are supposed to as long as you give them what they need.Now go have fun and invent something!
Date published: 2013-08-01
Rated 5 out of 5 by from Great Little AmpInstaled this amp in a diy portable boombox using 4 of the tang band 3inch buyout speakers and it sounds amazing.
Date published: 2013-02-28
Rated 5 out of 5 by from nice little ampNice little amp, small enough to be built into a cigar box. Want something mobile with enough power to push some bookshelf speakers and this delivers.
Date published: 2012-12-13
  • 2015-03-25T08:34CST
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Product Q&A

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who own this product or have experience with it.
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please email tech@parts-expresss.com  for a prompt reply.
2x25W at 4 Ohm TDA7492 Class-D Audio Amplifier Board Only

I'm building a portable boombox and the problem I am running into is finding a battery that can power this. Does anyone know a solution to battery power this amp and the battery not be an acid battery. I was hoping for something like a LiPo battery?

Asked by: Franklg2010

how would I wire in the Input signal? there is the J1 box that has 8 holes between the 2 RCA inputs and it looks like you connect the 1 channel into side, then hook in the other channel to the other side and ground wires into the middle 2 spots?

Asked by: bcboyz86

What is the input impedance of this amp and drive requirements? Can it be driven from the headphone output of a communications receiver without any padding?

Asked by: KB5HOV

Would a 15V 1.4A power supply work with this amp? I'm not sure that 1.4A is enough.

Asked by: AlwaysBreaking
Yes. I have that adapter. The fellows 15v it's a buyout special. It's rated 1.4 but it actually puts out 2.5 amps at 15v and something like 3 or so at 14v .yeah it works good.
Answered by: jim80
Date published: 2015-03-25

Is it possible to bridge this amplifier? If yes how would I go about doing it? 

Asked by: Tyler99
This amplifier cannot be bridged.
Answered by: MattP
Date published: 2015-02-11

The amp pictured has a heat-sink, yet the description indicates it doesn't need one. Is there a heat-sink installed on the board as shown?

Asked by: Jimmy630
Yes this does include a mounted heat sink as pictured. I will have the copy fixed.
Answered by: MattP
Date published: 2015-01-09
  • 2015-03-25T08:12CST
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