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2x100W TDA7498 Class-D Amplifier Board

Brand:| Model: AA-AB32189
Product Video
Overview
DIY audiophiles rejoice! This 2 x 100W Class-D amplifier board is perfect for two-channel critical listening.
Highlights
  • 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 # 
320-303
Weight: 0.87 lbs.  
IN STOCK
List Price$39.99
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$34.90
Buy 4-up$33.10
Part # 320-303
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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.

Features:
• 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

Specifications:
• 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
    (11 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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Reviews

2x100W TDA7498 Class-D Amplifier Board
2x100W TDA7498 Class-D Amplifier Board is rated 4.6364 out of 5 by 11.
Rated 5 out of 5 by from Great Amp!!I purchased 3 of these as a start to my whole home audio setup (9 more on the way). I would've used the 6 channel variant except it didn't break out the standby and mute controls for each channel pair, they were all tied together; this one has mute and standby controls, so I can turn off each zone independently. Works great for driving 8-ohm in-wall speakers (don't know the brand/type, they were with the control4 system that was in the house before). Running 20volts, (datasheet says max power into 8ohms is around 35W) and they are ear-splittingly loud with no discernible distortion (not an audiophile, just an average user with some experience), I had to leave the gain on low to allow adequate precision on the source's volume control.A few notes:The pcb appears to be a different revision from the one shown, so the following (and the accompanying picture) is about the version I have:-no output screw block for daisy chaining the power, however, it does make it a little bit smaller.-The alternative input for audio are 2 sets of 0.1" holes (4 each: Left, Gnd, Gnd, Right), one behind the other. Great for either a set of screw terminals, or two sets of wires for daisy chaining. (In the picture, they have screw terminals, I added those. They don't come populated)-The screw terminals on the power input are populated (at least on mine), so that made setup easier!-There is no footprint/connector for the volume control daughter board (on the input side). It does, however, make the board a little smaller overall.-The gain switches appear to be different from the silkscreen labels, so don't just assume setting them to medium is medium. I just left the input device volume the same and flipped the switches while listening to determine which ones were what, pretty easy.Lastly, the fan is not on a thermal control, it is always on, even when the amp is muted or in standby, which mine are going to be spending the bulk of their life in. It is a 12V fan, and fairly small current, so you could switch it on externally on when you turn the amp on. I just unplugged and removed it (the amp didn't use the sense line from the fan, so no issues there) because I'm running nowhere near max power and in a well-ventilated case, mounted vertically. Even at unnervingly loud volumes I couldn't feel any warmth at all, however YMMV.Note, the picture shows the amp without the fan because I removed it, the amp does indeed come with a fanTL,DR: awesome amp, found no problems and it is perfect for my whole house audio setup!
Date published: 2015-05-14
Rated 5 out of 5 by from Great Amp!Purchased 3 of these as a start to my whole home audio setup (9 more on the way). Would've used the 6 channel variant except it didn't break out the standby and mute controls for each channel pair, they were all tied together; this one has mute and standby controls, so I can turn off each zone independently. Works great for driving 8-ohm in-wall speakers (don't know the brand/type, they were with the control4 system that was in the house before). Running 20volts, (datasheet says max power into 8ohms is around 35W) and they are ear-splittingly loud with no discernable distortion (not an audiophile, just an average user), I had to leave the gain on low to allow adequate percussion on the volume control.A few notes:The pcb appears to be a different revision from the one shown:-no output screw block for daisy chaining the power, it does make it a little bit smaller, so that's a plus.-The alternative input for audio are 2 sets of 0.1" holes (4 each: Left, Gnd, Gnd, Right), one behind the other. Great for either a set of screw terminals, or two sets of wires for daisy chaining.-The screw terminals on the power input are populated (at least on mine), so that's good!Lastly, the fan is not on a thermal control, it is always on, even when the amp is muted or in standby). It is a 12V fan, and fairly small current, so you could switch it on externally on when you turn the amp on. I just unplugged and removed it (the amp didn't use the sense line from the fan, so no issues there) because I'm running nowhere near power, and even at max volume I couldn't feel any warmth at all, however YMMV.TL,DR: awesome amp, try it, and if you don't like it, you're only out about one tenth the cost of a similarly performing name brand amp.
Date published: 2015-05-13
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
  • 2015-07-02T07:04CST
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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

Which would work better with this amp and why? 320-314 or 120-055 I'll be using the amp to power 4 Hivi B4Ns and 2 tweeters (undecided on which tweeters). It'll also power a bluetooth receiver (320-351) and a pre-amp (320-6538).

Asked by: Collinjay
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: 2015-06-12

Is it possible to "Bridge" the speaker output of this amplifier. Or, would it harm the amplifier if ONLY one speaker was connected? I'm trying to use this amp with a Digitech guitar preamp and a single 12" speaker.

Asked by: voicecoil
No bridging. It already uses a full bridge to drive the speaker output. No harm (usually) to leave one output unconnected. Just don't drive that input.
Answered by: stoc005
Date published: 2015-07-01

I want to put this amplifier in a portable speaker project but I am having a difficult time finding a LiPo battery for the power solution. Do you have a recommendation as to a portable power solution that will render the desire 36VDC for 2x100W output?

Asked by: JagoABN
In answer to your question, LiPo batteries are 3.7 volts per cell, therefore if you were to purchase two five cell (referred to as 5S) batteries you'd be able to have 37.5 volts (really about 40 when fully charged) however you'd need a GOOD LiPo "Balance Charger" in order to charge the batteries correctly. WITHOUT a good "Balance Charger" you will eventually destroy the battery. Also, these batteries are VERY common for use in RC (remote control) Cars, Boats and Airplanes. ANY good RC hobbyshop will carry both the batteries and chargers. You may want to read up on the use and charging of LiPos and there's TONS of stuff on the Internet.
Answered by: voicecoil
Date published: 2015-06-02

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: 2015-05-13
  • 2015-07-02T08:31CST
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