2x100W TDA7498 Class-D Amplifier Board

Brand:| Model: AA-AB32189
Product Video
DIY audiophiles rejoice! This 2 x 100W Class-D amplifier board is perfect for two-channel critical listening.
  • 2 x 100W Class D amplifier
  • Small footprint for space limited applications
  • Perfect amplifier for dedicated stereo use
  • Built-in cooling fan and over-temp protection circuit
  • 14 to 39 VDC power supply required
Part # 
Weight: 0.87 lbs.  
List Price$39.99
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Your Price
Buy 4-up$33.10
Part # 320-303
Qty:  EA
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Product Details

2x100W TDA7498 Class-D Amplifier Board

This amplifier board features a state-of-the-art, dual channel Class-D TDA7498 IC, which delivers up to 100 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 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 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 TDA7498 amplifier IC
• Heatsink with attached fan
• Pre-drilled mounting holes
• Over-temperature, over/under voltage, and over current protection circuits
• Phoenix-type speaker terminals
• Line-level RCA input

• Power output (w/ 36 VDC power supply): 100W x 2 (6 ohms, THD 10%), 80W x 2 (8 ohms, THD 10%), 78W x 2 (6 ohms, THD 1%)
• Frequency response: 22 to 22,000 Hz
• Minimum impedance: 4 ohms
• Recommended power supply: 14 to 39 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

2x100W TDA7498 Class-D Amplifier Board
  • BrandParts Express
  • ModelAA-AB32189
  • Part Number320-303
  • UPC844632096686
  • Product CategoryAudio Amplifier Boards & Modules
  • Unit of MeasureEA
  • Product Rating
    (9 Reviews)
  • Weight0.87 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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2x100W TDA7498 Class-D Amplifier Board
2x100W TDA7498 Class-D Amplifier Board is rated 4.5556 out of 5 by 9.
Rated 5 out of 5 by from Impressive Little AmpPurchased the Parts Express - 2x100W TDA7498 Class-D Amplifier Board along with the recommended 24V power supply to power my vintage Polk Audio Monitor 10s. I'm using my computer as the source/pre-amp input for my primary multi-media system. I usually prefer to use vintage audio equipment in my music systems (I have a Dynaco ST-70 tube amp as well as several behemoth receivers from the 1970s), but wanted to try one of these tiny chip-amps. All I can say is WOW this little thing is impressive! I was planning to power this with a 36V Mean-Well power supply, but I'm glad I tried the 24V unit from PE (saving $$ ). I adjusted the output up to 27V and the output of this amp is quite loud, with tremendous punch in the lower frequencies, smooth through the midranges and clear and quite airy (not harsh at all) in the upper stratosphere. I'm hooked, and already planning to get another to drive a pair of large end-table sized (circa 1975 Audio Spectrum) 15 inch 3.5 ways I'm in the process of rebuilding (again).
Date published: 2015-02-27
Rated 5 out of 5 by from This little amp rocks!I bought this for a project but changed when my wife wanted a speaker system in the living room. I was going to buy a sound bar system because you get speakers, wireless subwoofer, bluetooth and on some Wi-Fi. After researching sound bar's, I realized they are not very good for music. I had an old pair of tower speakers that were hardly used. I put them in the living room along with the TDA7498 amp, an Apple Airport Express. I connected these devices together and BAM! I was able to access and stream my iTunes library, Pandora or any other audio app on my iPhone. The sound of this amp was amazing! I am willing to challenge any sound bar around to see who is the champ, sound for sound. I then connected a Polk Audio DSW MicroPRO 8" sub and now my house shakes with hi-fidelity sound. The hi and meds are awesome, too!
Date published: 2013-08-13
Rated 5 out of 5 by from Great Product, there is a manual too.I agree with the over all positive points people have made on this site, I purchased the board from PE and just finished putting together a nice compact little amp for the shop. I notice several people comment about the lack of a manual, PE has the manuals online.. the manual for this item is here:http://www.parts-express.com/pedocs/manuals/320-303-parts-express-manual.pdf
Date published: 2013-08-04
Rated 3 out of 5 by from A little frustrated, but it should workI just finished installing this board, and it OK... but I sure wish it had more volume (like the one it replaced with similar specs).OK, so a little background: I built an amplifier cabinet using a SURE 11141-112v100 board (also a 2x100 watt) that I bought from Parts-Express, to run several sets of speakers in my workshop. I used impedance matching speaker volume controls (that I also bought at P-E too). The rig worked great for a few months and with a good 32V PSU, had more volume than I needed. A couple of weeks ago, I was driving the system with an ASUS netbook per usual, when I decided to hook up an external monitor to see ITUNES better. As soon as I plugged the VGA monitor into the netbook, I started getting a loud interference sound from the amplifier. I unplugged the monitor and it went away, plugged it back in and it came back... then the amp died. No way to explain this failure... the items were on different AC circuits... and the netbook is meant to drive a VGA monitor... but there it was, dead. As the whole project was built around the old board, I had no choice but look for another at P-E (it was out of warranty as it sat in the box for a long time before I built the project). Turns out, the old board was no longer available, and so I bought this new one. While the wattage is the same, the dimensions are not, which necessitated a shop fabricated adapter board to mount this in my cabinet. Once I got it all together, it worked OK, but the volume is significantly lower than the old board with similar specs. I am disappointed, but not enough to start over again. I just hope this Sure board is not as touchy as the last one.
Date published: 2013-07-19
Rated 5 out of 5 by from Cheap, loud, small, versatileI built a home sub box, and built a compartment in the bottom of the sub box for this amp and a power supply. I used to 2 computer ATX power supplies in series, giving me 24V at 15A. I have a two 6.5" kickers that are now loud as some 10" subs. I was impressed by the volume at low frequencies. An important point, if you hook an ipod or smartphone to this amp, it wont be very loud. From the sub out on a home receiver, which puts out a voltage signal 2-3 times larger, the amp plays at full volume. For volume control, I wired a pot between the amp and the input source which works really well. I would recommend this amp to anyone wanting a custom, cheap, and loud set up who is willing to put some time into setting it up. I used this to build a $300+ powered sub box for $66, which you can't beat!
Date published: 2013-02-09
Rated 4 out of 5 by from A very good but just a bit less than great amp board...I finally got one of these for testing. After about 8 hours of burn in, this amp board sounds very good, but does not have quite the transparency in the midrange of the Tripath designs. However, this is in fact a more powerful design at 8 Ohms than the TK2050 based amps from Dayton and Sure (now under the Parts Express brand). The design has clearly been corrected from the early versions that were marginally stable and had a frequency response tilted towards the treble when first reviewed. The amount of headroom on this board is much greater than that of the other designs I have tried in the Class D category, and will fill a large room with clean sound using a 20 VDC power supply into medium efficiency speakers. Since this board can be driven safely with up to 36 VDC, there is much more power to be had with a better power supply. Because of the max voltage rating of this particular board, it can be driven by a simple linear power supply using a 25-0-25 VAC transformer (readily available from Parts Express) full wave rectified (2 decent capacity diodes) into an arbitrarily large electrolytic capacitance (say about 10,000 uF rated at 50 VDC)--much simpler to build than the 30 VDC regulated supplies I have been building and testing with the Tripath boards.One caveat, since this board is not supplied with a manual: when setting up, be sure that the dip switches in the center front of the board are both ON, or you will get no sound from the board. (These are not the gain dip switches, which are on the right front (viewing the RCA jacks) of the board. I initially thought I had a bad board, until I examined the (extremely!) tiny print explaining the operation of the center dip switches.In summary, a great board for anyone who needs a LOT of power at low cost (and particularly if willing to build a linear supply to power it) at very good quality. This is a good board, but does not produce the astonishing clarity and 'you are there' feeling provided by some of the other class D boards on offer, as well as the Dayton, the Lepai, and (by reputation) the Topping amps. I think that most listeners would be perfectly happy with this board, and I must observe that my own ears are THOROUGHLY spoiled by half a lifetime of living with high end (not ridiculously expensive TOP end) equipment, not to mention the low cost but high end sounding equipment I've been experimenting with over the past 18 months. In terms of specs, I cannot explain the (to my own ears) difference in quality between the output of this board and the others I have tried, but afterA-B listening with a variety of program material, I am convinced this is real. But, to put this in perspective, the sound of this board is as good as what I have experienced from really good class AB amplifiers, so I can unreservedly recommend this board to all but the most picky end users. Oh, and at the current price, this board is an AMAZING value, though once again Parts Express has spoiled me silly.
Date published: 2012-12-04
  • 2015-04-19T06:38CST
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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 tech@parts-expresss.com  for a prompt reply.
2x100W TDA7498 Class-D Amplifier Board

Is the fan really necessary on this amp if it really doesn't put out much heat?

Asked by: Blantto
The amp has the potential for getting hot. Without a fan, the heatsink underneath may not dissipate enough heat.
Answered by: TomI
Date published: 2015-04-08

SW2 is missing on my board.  The 4 solder locations are there, but no dis switches.  Is my board defective or is this an undocumented design change?

Asked by: GThompson
Tech support verified that dip switch SW2 has been designed out of the board and the newer boards no longer have that gain switch.
Answered by: GThompson
Date published: 2015-02-05

Hello, What is the best power source for this amp(320-303), I haven't been able to find a 39VDC 6A "wall wart" so do you have any suggestions besides a bench power supply, but from what iv'e seen I'll be turning to the soldering iron.

Asked by: David1
The only power supplies we have available that will sufficiently power this amplifier are bench type power supplies.
Answered by: MattP
Date published: 2014-12-02

I want to build an ammo can stereo using two kicker 5.25 speakers 3.5 jack & charger connection plug. Wont be any port holes, will this amp be ok in there completely enclosed?

Asked by: Virg
Yes this will be fine under normal usage, these do not generate very much heat.
Answered by: MattP
Date published: 2014-11-19

Hello sir, how much shipping cost to malaysia?

Asked by: ghos7mas7er
Please contact our sales and customer service for available stock, price and shipping options. sales@parts-express.com or 800-338-0531 x2.
Answered by: MattP
Date published: 2014-10-27

It was working fine for a month. Then today it starts blinking. Now I got nothing. Is it dead?

Asked by: CalebBay812
Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2014-10-27
  • 2015-04-19T08:37CST
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