TDA7492 Digital Audio Amplifier Board 2x50W

Brand:| Model: TDA7492
This Class D amplifier board produces immense power in a condensed space.
  • Class D amplifie produces 2 x 50 watt @ 8 ohms
  • Mono BTL power 100 watt @ 4 ohms
  • 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
Part # 
Weight: 0.1433 lbs.  
Due In: 12/30/2014
List Price$24.99
Regular Price$16.50
You Save10%
Sale Price
Part # 320-606
Qty:  EA
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Product Details

TDA7492 Digital Audio Amplifier Board 2x50W

Originally designed for high-end televisions, this tiny amp board delivers 50 watts into two channels, or an impressive 100 watts into a single channel. 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, 1 x 100 watts @ 4 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
    (5 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 4.2 out of 5 by 5.
Rated 5 out of 5 by from Good bang for your buck!just purchased a few of these little guys, hooked one up to a 140watt 3-way speaker on a single channel and it sounds great!! thanks PE!
Date published: 2014-10-22
Rated 4 out of 5 by from Nice Little Amp, more like 35W/channel into 8ohmsI was surprised at how small this amp is. That said, it is not able to deliver 50W/channel into 8ohm. Figured I would offer a bit more info for others looking at this amp:35W/channel into 8ohm from a 24V supply.47W/channel into 6ohm from a 24V supply.50W/channel into 4ohm from a 20V supply.If driving into 4ohm loads, make sure to use a supply voltage under 20V!The output filter is optimized for 6ohm loads.Gain is set to 33.6dB.Inputs are single-ended, not differential as shown in the schematic. Make sure your source ground/return is good.Check the heatsink screws: I received 2 of these, first one was over-torqued, bowing the PCB, Second was uneven with the heatsink tilted and barely touching the chip. Easy enough to correct. Put some thermal grease in there if you have it.While not quite as advertised, this is not a bad little amp.
Date published: 2014-07-21
Rated 3 out of 5 by from could be goodused with a 12V 2A supply, audio starts distorting much sooner than i would have thought. not getting anywhere near 25W before low end starts getting clipped. just ordered a 12V 5A supply, hopefully will provide enough power to prevent distortion.
Date published: 2014-07-05
Rated 4 out of 5 by from Great valueGreat little power amp.! Be careful with P.S. do not over power it . I blew one on 40volts I bought another . My mistake.
Date published: 2014-07-02
Rated 5 out of 5 by from awesome! Really powerful.These deceivingly small boards have become my go to boards for a wide-wide range of pro audio situations and products. They rock! And are extreamly flexable power supply wise.most of the time I use the parts express smps 120-055 24 volt but, they work just fine off of theyre 12 volt 5000ma smps as well. Great desighn all the way around.
Date published: 2014-06-06

Product Q&A

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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.
TDA7492 Digital Audio Amplifier Board 2x50W

Can this board (or any of these amp boards) be used for a guitar power amp? I'd use a tube preamp.

Asked by: Jeff10
You could probably use this amplifier that way as long as the input signal from your tube preamp doesn't overload the input stage of the amplifier chip. It would be good to use a tube preamp that has adjustable output level to attenuate the signal as needed prior to the signal entering this amplifier board.
Answered by: DaytonAudio_Rory
Date published: 2014-12-16

can one of these be used for combined input-output left, another for combined input-output right? will the shared input ground present any major problem with this, and will it deliver more power?

Asked by: likesbass

since i am a dumb person where does the power come in to this 7942? how does a two wire digital wire to it where can i get a complete schematic, so i see where to hook power.

Asked by: cat222
The wiring diagram for this amplifier board is provided in PDF format above. The DC input should be connected to the middle set of screw terminals. Be sure to observe proper polarity as shown in the wiring diagram PDF, or else you may damage your amp board.
Answered by: DaytonAudio_Rory
Date published: 2014-12-01

Can i use a 14.8v RC car type battery to power this amp? If so, how much real wattage would you expect to produce in mono. Something like this http://www.all-battery.com/148volt-5100mahli-polypack-1-1.aspx

Asked by: djdaveastro09

I see references in other questions to a schematic, yet nothing came with mine.  I assume the so-called Phoenix connectors are as such: Left one is for left output, right one for right output and middle for power. Should I have received a schematic?

Asked by: djjimus
I bought 2 of these amps. I did not get a schematic for either. There is a schematic on this page that shows how to wire this amp, except it does not explain or show how to run this in 100x1 @ 4 ohms. I would really like to have the schematic updated to include this information since it's listed under the details.
Answered by: monster_mm
Date published: 2014-11-18

Can we get separate or updated wiring schematic to shows how to bridge this amplifier? I think that would help a lot of us out.

Asked by: monster_mm
This amplifier cannot be bridged in the conventional sense, because the Class-D amplifier chip already contains four internal amplifier channels that are bridged internally before the output pins, so each channel already has a "BTL" or bridge-tied load configuration. This is referred to as a full-bridge Class D amplifier. However, you can wire the two channels of the amplifier in parallel at the inputs and outputs to create a "parallel bridge-tied-load configuration", or "PBTL". You don't get any additional output power from this arrangement for a given impedance, but the amplifier chip will become stable at 1/2 the typical minimum impedance for the chip (so this amplifier which is normally capable of driving a 4 ohm load will be able to drive a 2 ohm load). Cutting the load impedance in half as enabled by the PBTL configuration will allow the amplifier to double its power into this halved impedance.
Answered by: DaytonAudio_Rory
Date published: 2014-11-21

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