6x100W TDA7498 Class-D Amplifier Board

Brand:| Model: AA-AB34181
Product Video
This amplifier board uses three Class-D TDA7498s to generate up to 100W x 6-channels, making it the perfect 5.1 amplifier solution.
  • 6 x 100W Class-D amplifier
  • Small footprint for space limited applications
  • Perfect amplifier board for DIY 5.1 amplification
  • Built-in cooling fan and over-temp protection circuit
  • 14 to 39 VDC power supply required
Part # 
Weight: 1.35 lbs.  
List Price$69.99
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Your Price
Buy 4-up$56.81
Part # 320-307
Qty:  EA
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Product Details

6x100W TDA7498 Class-D Amplifier Board

Build your own high-power 5.1 amplifier with this 6-channel amplifier board. Three Class-D TDA7498s are used for extreme efficiency. 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. Additionally, separate inputs and outputs make this amplifier board perfect for tri-amplifier use. Just add a 14 to 39 VDC power supply, signal source, and speakers!

A low noise cooling fan is mounted atop the robust heatsink to maximize heat dissipation. Thermal, over/under voltage, and current protection circuits are 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 dual stereo RCA line-level inputs are pre-attached. Mounting holes are provided as is a 2.1 mm x 5.5 mm power jack for quick connection. Screw-down phoenix-type terminals are included for quick speaker wire connection.

• Three Class-D TDA7498 amplifier ICs
• Heatsink with attached fan
• Pre-drilled mounting holes
• Over-temperature, over/under voltage, and over current protection circuits
• Phoenix-type speaker terminals
• Six line-level RCA inputs

• Power output (w/ 36 VDC power supply): 100W x 6 (6 ohms, THD 10%), 80W x 6 (8 ohms, THD 10%), 78W x 6 (6 ohms, THD 1%)
• Frequency response: 22 to 22,000 Hz
• Minimum impedance: 4 ohms
• Recommended power supply: 14 to 39 VDC, 18A regulated
• Fixed gain settings: 25.6 dB, 31.6 dB, 35.1 dB, 37.6 dB
• Power input jack: 2.1 x 5.5 mm, center-positive
• Dimensions: 6" L x 4.5" W x 1.4" H

Product Specifications
  • Power Output (RMS Per Channel @ 8 ohms)80 Watts
  • Power (RMS/Channel 8 ohms)51 - 100 Watts
  • Special FeaturesBoard Only Module
  • Weight Range< 10 lbs.
6x100W TDA7498 Class-D Amplifier Board
  • BrandParts Express
  • ModelAA-AB34181
  • Part Number320-307
  • UPC844632096716
  • Product CategoryAmplifiers
  • Unit of MeasureEA
  • Product Rating
    (5 Reviews)
  • Weight1.35 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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6x100W TDA7498 Class-D Amplifier Board
6x100W TDA7498 Class-D Amplifier Board is rated 4.0 out of 5 by 5.
Rated 5 out of 5 by from Great amp !Picked up this amp to power a boom box project. I am only using 5 out of 6 channels to power an active setup. I am using an active crossover to derive a stereo two way with single subwoofer. So far I am pleased with the soundThis little amp easily powers the tang band 5 1/4 neo subwoofer, two 4 inch Dayton mid woofer and two vifa textile 1 inch dome tweeter. It is running at 30 volts with a DC boost converter from 12 volt battery bank. As it is only powering small speakers it is running very cool to the touch so I have removed the fan from the heatsink. I played it for several hours with some punishing bass and it remains nice and cool so I will leave the fan off for my application. I imagine if you are running this amp with all channels fully driven it will heat up but for me it is not under serious load. I tested the amp powered from 12 volts and it still has a good solid sound but I recommend a good amount of current at lower voltages. This is a very flexible amp with good channel options. It is very well made with the look and feel of a quality motherboard. The sound quality is pleasing and I can't wait to find more applications to use this multi channel amp for. I am installing some outdoor speakers this year and I may have found my amp solution for that too.
Date published: 2014-03-06
Rated 4 out of 5 by from so far so goodI havent run all 6 channels yet but everything seems to be pumping out pretty good at 8 ohms. Info on these units is spread all over the place, and I've many questions.I'm trying to avoid damaging surges. If I put a power switch on the AC input am I safe in most situations ? Will this help if I remember to turn it on/off ?If I'm not using a channel is it safe to run with :1) no input2) no output3)neitherIs there an adviseable way to hack the power DIPswitch- i.e. a 3 way panel/mount switch that can toggle between on/off/mute(standby) ?I've front-mounted my RCA inputs for various reasons, and now I'm afraid someone will yank one out. This will probably cause an ugly surge. I will either:a)lock the RCA's down somehow.b) think of a way to make a buffer so I can hot-swap inputs on this amp(or switch to a 'mute' status to cut output spike ?)
Date published: 2014-01-25
Rated 5 out of 5 by from excellent valueI've used the Sure Electronics amps for a lot of projects and they have proved both durable and powerful. In one project I needed to deliver a 0.5Hz sine wave at 90W, and it did the job. It is important to note that these things are VERY sensitive to impedance: at 4 ohms with a properly rated power supply they deliver full 100W RMS per channel (sine wave). At 8 ohms, around 55W, and something peculiar: at 6ohm only about 35W. So watch your impedance, feed it plenty of juice and enjoy the incredible savings.
Date published: 2013-11-01
Rated 1 out of 5 by from Don't Expect To Turn The Volume UpThis board sounds good on paper. However, I'm experiencing the same problems documented by others and will be returning the board if I can't get this resolved.When you turn the amp. up to about 3/4 max volume, the sound starts to cut in and out. This is not the same as a normal amp that will start to slowly distort. This is an over current circuit kicking in cutting the sound off and on. I'm using the 36 volt Meanwell PS and am sure it's not a PS problem.So don't expect to be able to fully utilize the full power of this amp out of the box.The solution I'm told is to modify the output filter. I need to do some more research on what needs to be done.
Date published: 2014-02-10
Rated 5 out of 5 by from franken-stereobought the board to build a tri-amped setupquality: average... RCA suck...speaker connections weak.. small footprint though...Power Supply: i used a 36V 20A digikey power supply... was going to try two or three modded computer power supplies but I heard issues will come up if outputs are not isolated.. decided to be safeFeatures: gain is only adjustable in 5 step increments with DIP switches... in three pairs... no individual channel gain... no soft off.. will thump your speakers.. I wired in a tweeter disconnect to protect them.Operation: this system rocks... better performance than name brand bi--tube-amped setup in living room... better clarity, better highs, bright without shrill, rich mids, powerfull lows with no boom..overall: $60, 6CH, 600W.... cant go wrongsidenote speakers are all parts-express... 8" woofer, sealed back 4" mid, dome tweeter.input stage includes, dbx stereo 3way crossover, dbx EQ (not needed but I love tunablilty)
Date published: 2013-09-28

Product Q&A

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6x100W TDA7498 Class-D Amplifier Board

What happen if I don't need to use one of the 6 channels?

I have a 5.1 home theater system and and the power board just burns up. Can that board help me?
Asked by: Orcuperz
If this is a home-theater-in-a-box style system, this will likely still require 6 channels, because the amp is in the system for the sub as well. I don't know how your system is or how it's wired, but if you can attain RCA preouts for all channels, this may suit your issue *IF* the preamp and decoding circuitry is okay. (That's a big IF, and you may just be better off buying a new receiver/system.) If you have a vid-player that has all channels of preouts decoded for analog connection, this could also work, but you'll still require a level adjustment method, not unlike a preamp.Just speculating here- but it is minutely possible this could resolve your issues. Of course- you'll still require the power supply as well, as the amp you have is likely run at a different voltage supply level.
Answered by: Wolfy
Date published: 2012-10-19

How can I connect three amplifiers to one sours of signal (or music)? I mean the 6 X 100W Class D Audio Amplifiers TDA7498

I have total 9 pairs of speakers and planning to buy 3 of this amplifiers - (6 X 100W Class D Audio Amplifiers TDA7498), It is going to be 3 pairs of speakers for each amp. How can I connect all three amplifiers to one sours of signal (or music)? Do I need something else in between of my preamp and the power amps? Thanks
Asked by: andreyambalov
You need something to split a stereo signal into 9 stereo signals. This can be achieved with a number of products. Depending on the impedance of your source and the type of connector what equipment you need varies. The input impedance of these amps is 48kOhm minimum.Sorry, I think we need more info to make a recommendation for you.
Answered by: Travis Rysdam
Date published: 2013-03-18

I need a 5.1 amp to mount with my htpc.

I have 2 unused rails from the pc power supply at 12v 18a each. would 12v be enough to power this amp? Driving 4ohm 5 inch 2-way speakers, volume is not a concern but quality is.Thanks,Peter
Asked by: Pepond
You should be able to run the amp on 12 Volts but I wouldn't expect more than 25 watts/channel out of it, it really needs the higher voltage power supply to shine.
Answered by: Beatnik
Date published: 2012-02-08

Would you be able to run this amp off of two of the 24V 350W power supplies?

Asked by: lawler3000
No, not well anyway. Ideally 2 of those SMPSs wired in parallel would yield double amperage at 24v (total 700 watts). I am not sure this would work anyway, but if it did you would be well above the maximum amperage rating (18 amps) in order to get the full 700 watts of input. So, you would run the risk of burning the amp up if you turned it up loud enough to appreciate 100 watts per channel.Really you would be better off looking for an SMPS rated at 36v and 18amps (648 watts). You won't find one of those here though.To be honest, even with such a power supply you won't get 600 watts of output from this amp.
Answered by: Travis Rysdam
Date published: 2012-07-04

Why couldn't you use the 48VDC 600w Power Supply (#320-317) ?

Asked by: Invisible Audio
The 320-317 Power supply has an adjustable voltage but it will output 43 Volts at its lowest setting and the amp board can only handle up to 39 Volts.
Answered by: Beatnik
Date published: 2012-10-23

So... where is the mystery power supply?

From what I am reading, and forgive me for being new at this, there is no 36VDC 18A regulated power supply here at PE.The 24VDC 14.6A 350W is not enough juice.The 48VDC 12.5A 600W is too much juice.I tried to find one that was 36VCD AND 18A online and found one- for almost $300.What's the solution here? Settling for less than 100WPC? I just don't have the electrical knowlege to field this myself and am just getting into the DIY audio. But I really want to build an amp and even though I will not start with this one, I do have plans for it in the future. I am just lost on the power supply situation.
Asked by: Spaker
There are creative ways to overcome this by using multiple power supplies, but that isn't easy, elegant, or space or cost effective. Your best bet would be to look for something like the Meanwell HRP-600-36 if you are looking to get near the full 100 watts per channel. This model is not available at Parts Express, but Google will yield results if you search for the model #. It looks like you can find these for prices comparable to the 600 watter you referenced. Of course 600 watts in does not equal 600 watts out, as no amp is 100% efficient. These boards are pretty efficient though, about 90%, so they should top out about 540 watts.Keep in mind that at 100 watts per channel (80 with 8 ohm speakers) this board yields 10% total harmonic distortion, gritty. Also, the manual warns that you shouldn't push these amps for more than an hour. This is not meant to discourage you, but more as evidence that these aren't great if you plan on pushing that much wattage all the time.These boards are a blast to play with, and they actually sound very nice at low to moderately high volumes.Have fun!
Answered by: Travis Rysdam
Date published: 2013-09-25


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