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TDA7492 Digital Audio Amplifier Board 2x50W

Brand:|Model: TDA7492|Part # 320-606
This Class D amplifier board produces immense power in a condensed space.
In Stock
List Price$24.99
Regular Price$16.50
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Sale Ends2/15/2016
Part # 320-606
  • Class D amplifie produces 2 x 50 watt @ 8 ohms
  • Can be wired R+ to L+ for mono mode
  • Phoenix connectors for easy speaker hook up
  • 12" stereo wiring harness included
  • Short-circuit and over-temperature protection
  • STMicroelectronics TDA7492 chip is priced low but has big power
  • Four model GAIN parts can auto work on different voltages

Product Details

TDA7492 Digital Audio Amplifier Board 2x50W

Originally designed for high-end televisions, this tiny amp board delivers 50 watts into two channels. Use this Class D amplifier in DIY projects where high power is needed in a limited space.

The board includes a massive heat sink, and three dual-terminal phoenix connectors for easy termination of speaker lines. Included in the box is a 12" stereo input lead, making connection a breeze. Depending on the voltage powering the unit, you will need 1A to 4A of current.

Note: When the speaker impedance is 4 ohms, the operating voltage must be less than 18V. When the speaker impedance is 6 ohms, the operating voltage can not exceed 24V. When the speaker impedance is 8 ohms, the working voltage can not exceed 26V.

Specifications: Power handling: 2 x 50 watts @ 8 ohms • Minimum impedance: 4 ohms • THD: 0.1% @ 8 ohms @ 1 watt • Recommended power supply: 10V - 26V • Requires 1A - 4A • Stereo wiring harness included • Dimensions: 2-3/4" L x 2-5/16" W x 7/8" H.

TDA7492 Digital Audio Amplifier Board 2x50W
  • BrandParts Express
  • ModelTDA7492
  • Part Number320-606
  • UPC848864016580
  • Product CategoryAudio Amplifier Boards & Modules
  • Unit of MeasureEA
  • Product Rating
    (17 Reviews)
  • Weight0.1433 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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TDA7492 Digital Audio Amplifier Board 2x50W
TDA7492 Digital Audio Amplifier Board 2x50W is rated 3.8235 out of 5 by 17.
Rated 4 out of 5 by from Rainy day funI just got mine assembled today and my first impression is that it's a great little amp for the money. One thing though, the wiring diagram is wrong; it has one channel out of phase; the two amps are book matched images not mirror images as shown. I get no turn on thump and my amp is totally quiet. If you are getting noise check your grounds and your source. I'm not sure it needs the recommended 50k pot on the input, but give it a try if your phone or ipod is too loud. My heat sink was lose, so you should check yours and maybe use some locktight on the screws. I stuffed it into this little black box that PE sells. I may get rid of the volume pot and install a power LED to give it some sexy.
Date published: 2015-11-15
Rated 4 out of 5 by from Hi-Fi - Almost but a fantastic little Amp!I purchased two of these when they were on sale many months ago intending to experiment with bridging them for more power. My shop amplifier died so I pressed one of these into service as a test amp and for music in the shop.The sound is truly amazing for the price. A little harsh in the mid range but nothing you'd notice unless doing a direct comparison to a more expensive amp. Very full otherwise with decent detail in the top end. A very clean open sound. The speakers I'm using won't move much air below 50-60 Hz so low end extension is more than adequate for my application. Imaging is so-so but stable.My shop system is very modest - using a Kenwood pre-amp to drive this amp; a pair of small two-way book shelf speakers (old AR-7's). Using a laptop power brick to deliver about 20V at around 3.5A max. I have not measured the output power at clip yet but I can say it delivers enough oomph into the AR-7's to rock the shop - a 30'x16' room with concrete floors and insulated but open stud walls.Absolutely no hum or noise at all. Full gain with no signal some hiss but that's OK for the price and intended application. That's why I say "almost hi-fi". If I'f had one of these years ago as my main amp I'd have been very much pleased with the result.This is my first foray into Class-D and I'm impressed. This thing runs only slightly warm after a day of music and is super-simple to hookup and use (see my question for one slight gotcha that was probably my fault). A bargain at PE's price (these sell for more on one of the online auction sites) and an outright steal if you get them on sale!!
Date published: 2015-11-02
Rated 1 out of 5 by from Mediocre TDA7492 ImplementationPurchased a board with the intention of integrating an adequate speaker amplifier into a mini-ITX computer. Primary issue with this approach is that despite the PCB being arranged to isolate power and signal ground there's a trace tying them together on the back, which of course results in extremely high idle noise due to any signal on the power ground getting amplified. Cutting that trace resulted in acceptable performance, even better once I removed the pull-up resister and grounded gain0 to drop the gain from 33.6 dB to 27.6 dB. It worked fine like this yesterday... but now after just sitting overnight without power it's dead - second module I'd purchased hooked up the same works just fine. Everything I did was within the reference circuit for the TDA7492, so my best guess is some part on the board failed. Likely just going to return the second if modifying it to be acceptable results in failure.
Date published: 2015-11-01
Rated 5 out of 5 by from Mangepan MMG-W surround ampBought this for use as a surround amp for MMG-Ws (wall mounts). I know Parts Express recommends a specific power supply, but I went for the 15V 4.5A unit found it the buyouts. So far everything is working great: HS barely gets warm, and so there's plenty of output for my purposes (I'm in a loft, so there's not a need for too much volume). I'm using the pre-outs on my Yamaha RX-V667 to a set of DIY RCAs.One note, if you strip too much of the heat shrink off the input ground as I did to make the RCA jacks, you'll be left with bare stranded wire underneath. The heat shrink is the only jacket for that wire, so don't take too much off as I did. The leads are a little short! That's why there's the temporary tape in the pictures. As others have noted, there's no noise, and it handles the 5 Ohm Maggies just fine!
Date published: 2015-09-21
Rated 5 out of 5 by from Good SoundI was pleasantly surprised at how good this amp sounded, more than enough gain at the input and quiet as a grave. I powered mine with 18 volts, so it didn't put out its rated power. I measured 12.5 watts into 8 ohms, per channel. It was still plenty of power for reasonable speakers indoors. It will also run well on just a 12 volt battery. The input is very sensitive, so you will need a volume control for each channel, I used 25k pots on both channels. I did experience a hum problem (probably ground loop) when using the same power supply for the preamp, will use a different supply next time. I was able to eliminate my hum by connecting my power supply directly to the big capacitor on the bottom of the board. While the rated power may be a little optimistic, it worked fine for me.
Date published: 2015-09-10
Rated 3 out of 5 by from First Impression, Warm soundBought this and the TPA3116 to compare for future builds. First impression: This seems to be the more powerful, but I've decided it's really just a high gain setting from the get go. Actually, it's difficult to regulate lower volume settings because one click up on the iPhone volume from zero and BAM! it's actually kinda' loud already. By the time the volume setting from the source is at 30% this scrappy little amp is deep into what I call the too-loud distortion zone.Don't get me wrong, this thing has plenty of power for an average set of speakers, not just the high-efficiency variety. Seemed to have a warmer sound than the 3116 too, but unfortunately, the main chip died after about 4 hours use idling at 5% volume in a quiet interlude (playlist finished) with a strange 2-second "growl" (not from the source) followed by a puff of ozone flavored smoke. Parts Express is sending a replacement so I'm hoping for the best from module #2.
Date published: 2015-07-14
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Product Q&A

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TDA7492 Digital Audio Amplifier Board 2x50W

I am unable to get very much gain out of this. Using 18.5V and a traditional 50K pot on the input side. It's plays clean but Sounds much less than one watt on the output. Same behavior on both channels.  How can I troubleshoot?  Thx Ron

Asked by: SingingTransistor
Turns out I need around 600k to avoid impact to the input signal. The output is now similar to using no pot at all.  Output is nice and clean and I'm able to get full power out!
Answered by: SingingTransistor
Date published: 2015-12-29

So is there a secret to getting these to work?? I have two of them and neither produce any output at all. Hooked up per the wiring diagram using a bench supply set to 18V and a pair of small 8 ohm 2-way speakers I use for amp testing. 

Asked by: videotechie
I got one of the modules to work. I found the speaker connection blocks each had one bad solder connection. Almost like maybe I rotated the blue plastic block a little bit tightening the screws and this caused the solder connection to break. Anyway resoldering the speaker connections fixed one module.The other is still DOA. Going to see if I can find out why - will post any results.
Answered by: videotechie
Date published: 2015-10-30

Have a 27v 2.4Amp power supply.  Would that exceed the powers required by this board? Will it work or will it damage it?

Asked by: Rzrzrz
Going by the manufactures specs 27V will be too much for this amplifier and I can not recommend going above 26V.
Answered by: MattW
Date published: 2015-07-22

Basic wiring question; I get a full-volume buzz from my speakers until I have the input plugged into my 3.5 jack. Is there a way around this? Also wired a 500k pot (had it on hand) and get the buzz until the volume is about half way up. 

Asked by: WhiteTyrone
Please contact our tech support for more help with this question, or 800-338-0531
Answered by: MattW
Date published: 2015-07-24

How would you go about using RCA cables as inputs? What parts would I need and how would I wire it? I don't see any switches - how is volume controlled and the board turned on? If it's receiving power, it's on?

Asked by: Dassault
Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: GregT
Date published: 2015-06-25

Will this run good on a 12 volt power supply? Also I am looking for something like this that has Bluetooth built in? What do you have that will work for a volume control nob with on off built in?

Asked by: Jrod510
Regarding voltage supply, I would use a p/n 320-6546 to step up the 12v supply to a more appropriate voltage based on your impedance load (see product description above for voltages).  I've used that voltage converter to step up to 24v from a 12v SLA battery and power a Lepai p/n 310-298 amp (with built in bluetooth), and it works great.  
Answered by: scottadair
Date published: 2015-06-03
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