Clearance Item

2x100W at 4 Ohm TK2050 Class-T Audio Amplifier Board Only

Brand:| Model: AA-AB32186
This audiophile-grade amplifier board was designed using the critically acclaimed TK2050 chipset for efficient power output, just add a 12 to 32 volt DC power supply.
  • Line-level audio signal input
  • Mounting holes facilitate installation and fixing
  • Excellent heatsink and powerful cooling fan
  • Over/under voltage turn off
  • Over-current protection
Part # 
Weight: 0.65 lbs.  
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Product Details

2x100W at 4 Ohm TK2050 Class-T Audio Amplifier Board Only

This amplifier board is designed for the audio enthusiast who would rather build it than buy it. Each board has been thoroughly engineered, tested, and manufactured to above industry standards. Innovative features have been implemented into the board designs which have exceptional performance and would look as great in an art gallery as they will in your next audio project. The 2 x 100 watt amplifier board integrates Tripath's high performance TC2000 and TK2050 chips. Powered by any DC voltage from 10V to 32V, this high efficiency design is capable of driving 4 ohm or 8 ohm speakers with up to 100 watts per channel. Thermal management is maintained through the use of an temperature activated fan.

Features and Specifications:

  • Size: 148.30 (L) × 106.80 (W) × 35.50 (H) ±0.2 mm
  • A perfect "Class D" architecture
  • Wide power supply range: 12V to 30V, maximum 32V
  • Frequency response: 20 Hz to 20 kHz (±3 dB)
  • Signal/noise ratio: 100 dB (A-weighted)
  • High output power: 
        30W @ 6Ω, < 1% THD+N 
        40W @ 8Ω, < 3% THD+N 
        100W @ 4Ω, < 10.0% THD+N
  • High efficiency: 
        86% @ 60W 8Ω 
        82% @ 46W 6Ω 
        90% @ 100W 4Ω
  • Audiophile quality sound: 
        0.007% THD+N @ 30W 8Ω 
        0.005% THD+N @ 70W 4Ω
  • Line level audio signal input
  • Mounting holes facilitate installation and fixing
  • Several wiring methods facilitate connection
  • Excellent heat sink and powerful cooling fan on TK2050 eliminate your worry on heat dissipation
  • Over/under voltage turn-off
  • Over-current protection
  • Over-temperature protection

2x100W at 4 Ohm TK2050 Class-T Audio Amplifier Board Only
  • BrandParts Express
  • ModelAA-AB32186
  • Part Number320-334
  • UPC844632095771
  • Product CategoryAudio Amplifier Boards & Modules
  • Unit of MeasureEA
  • Product Rating
    (16 Reviews)
  • Weight0.65 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 at 4 Ohm TK2050 Class-T Audio Amplifier Board Only
2x100W at 4 Ohm TK2050 Class-T Audio Amplifier Board Only is rated 4.625 out of 5 by 16.
Rated 5 out of 5 by from Absolutely AwesomeI bought this on a whim- read all the reviews and thought;" Well even if its just "OK" it will work for a bench amplifier....All I can say is WOW this delivers I hooked it up to a 19vdc 3A computer brick supply and I was amazed at the clarity coming from the Overnight Sensations I built as a first test run of a DIY kit from Meniscus.So I am hooked forever...reel me in..LOL!! But seriously..I hooked up my phone via a mini headphone plug to RCA- L and R and hooked up to the Amp with the computer brick- ran about 7 feet of 14g speaker wire to the OS speakers and ran my google play- ya its the minimum fidelity- but when you think that its a goat rope at best ya press on...well NO GOAT ROPE- I will buy more of these amps....BUT 1st I will do the following:I have a chip-amp set up with a power supply but its at 35vdc I will order a more appropriate transformer so that the snubber power supply is at about 30vdc to see if there are any REAL differences or not between the brick and a built supply..
Date published: 2015-03-09
Rated 5 out of 5 by from Works great with transformer power supplyI installed this in a boom box to replace the original logic board and amp. I used a standard 12v transformer with a bridge rectifier and about 8000uf worth of electrolytic capacitors as a filter.I expected to hear a mains hum because switching power supplies are recommended for powering the amplifier. The unit is dead silent when not in use.
Date published: 2014-08-25
Rated 4 out of 5 by from surprisingly good sound quality and power!I bought this amp about a week ago and I couldn't be happier that I did. I used the amp to create a small desktop integrated amp that wasn't ridiculously expensive and still had good power output and could deliver a quality signal.If I can find an image I will attached it at a later point, but what I basically did was enclose a power supply and the amp in a nicely painted wooden box for my desk. I put a 50k logarithmic pot in for volume control, and a three way 2 pole selector switch for selecting between three inputs.However this amp isn't without it's faults! the installed power supply capacitors are WAY too small. On the board there is a bank of 8 220uF 50v caps all in parallel. this produces a net capacitance of 1,760uF at 50v. To put this into perspective, I'll use the Dayton DTA 100a as an example. The DTA has one TK2050 chip in it and used a 2,200uF 50v power supply capacitor. In that application that capacitor is too small, to get the absolute BEST performance from the DTA's integrated TK2050 chip it's recommended to used a 10,000uF 50v capacitor, almost 5 times as large as what's installed.So for Sure Electronics to think it is alright to put TWO TK2050 chips on a board and give them half the power supply capacitance that Dayton gives to ONE TK2050 is absurd. If you buy this board PLEASE upgrade the capacitors! It's an extremely simple mod that yields immediate noticeable results. All one has to do is remove all the capacitors along the sides of the board and wire one 20,000uF 50v capacitor into the holes of one of the capacitors that was removed. Having this extra bank of power available to the amp allows for deeper and fuller bass response and help make up for shoddy power supplies. I've included the part number to a capacitor available from DigiKey that is a good quality component with the appropriate specs. ECE-S1HG103Z simply buy two of these and wire them together in parallel, then connect the bank to where one of the original power supply capacitors were. It makes an enormous difference.Further I noticed that one of the adjustable voltage regulator on one side my board gets very hot, much hotter than the one on the other side. It's temperature is within the listed acceptable operating temperature from the datasheet so I can't really fault the board for this but it does seem wrong. I believe it's u4 on the silkscreen, and it's the small three legged component near the channel 2 input. If somebody else has a similar problem I'd love to know so we could possibly get this fixed! (note! My board is modified but this component was operating hot from day one when I first got the board.)Also the DC offset on this board is worth checking before it's used on any speakers. Since it's easy to adjust I recommend everybody who buys this board double check what their DC offset is as some people reported it being way out of spec. Just set your Multimeter to the 200mv DC range and measure the voltage across the speaker terminals when the amp has no signal. My channels were at 30mv and 50mv when i got the amp and I was able to dial them both down to about 15mv with some careful tuning. There's two adjustments for DC offset located under the heatsink, I wish Sure would have put holes in the heatsink to make it easier to adjust these parameters but that's a minor issue. Try to get the DC offset as close to zero as possible without going negative.Overall I think this is a great product and I'm glad PE stocks it, I'm a huge fan of T amps and I love their sound and effeciency. I would recommend someone buy this amp OVER the Dayton DTA120 that's currently available. With one simple mod an two simple adjustments this amp for about half the cost of that one absolutely blows it clean out of the water.Great product, I'm glad I own one!
Date published: 2014-08-21
Rated 5 out of 5 by from Sounds great!When it comes to precise stereo image and speaker control, both in the midrange and bass, this is the best amp I have ever heard. This results in a extremely detailed and "tidy" sound. Very studio-monitor-like. I use it with a Delta 24V/150W switch mode power supply. It can be adjusted up to 27V. At this voltage the max power before clipping is about 2x30W/8ohm anf 2x55W/4ohm. This amp needs a long run in time before it sounds good, in my opinion about 15 hours.
Date published: 2014-08-15
Rated 5 out of 5 by from A great amp !! Work excellent !I bought this unit about 2 weeks ago. I'm very pleased with its performance.I would definitely recommend this product without any hesitation. Thanks for offering such a great product !
Date published: 2014-06-14
Rated 5 out of 5 by from Good replacement for older ampsI got tired of repairing the two driver boards in my Sansui 5000X. I bought the Sansui receiver/amp in 1971 so it holds sentimental value for me. This little amp fit very nicely in the 5000x chassis after removing the driver boards and capacitor banks. I had a 12volt, 4 amp SMPS that fit the underside of the Sansui chassis.At this price point, this little amp can't be beat. Although mine only delivers aprox. 48 watts it drives a pair of ESS AMT PS-820 speakers with ease. Those with less efficient speakers would want a larger voltage/current PS.Products quality is outstanding and parts placement is well thought-out.No knocks for this product so far.
Date published: 2014-06-13
  • 2015-07-02T07:04CST
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  • cp_1, bvpage1
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  • clientName_PartsExpressInternational

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  for a prompt reply.
2x100W at 4 Ohm TK2050 Class-T Audio Amplifier Board Only

i dont know if i will buy this amp but what does the input have to be for it to give out around 40 watts

Asked by: kristoffer200

Hi, if i was to run this amp on the minimum 12v would i still get 100w out of each channel? Also it says 10.0% THD, will this be noticible? 

Asked by: Dannz97
Answer to first question; No. Answer to second question; Yes, very noticeable. The human ear can easily detect distortion levels of 0.5% so 10% is going to sound nasty dirty distorted.
Answered by: bassmeknik
Date published: 2015-06-23

1. Why are you discontinuing item?  2. What will replace this model? 

Asked by: Pumpkin Duke
This has been replaced by part number 320-3340 which is due at the end of June.
Answered by: MattP
Date published: 2015-05-20

Can you bridge the speaker outputs to drive a single subwoofer?

Asked by: michelevit
Not a bridgeable amp.
Answered by: TomI
Date published: 2015-05-11

My question is two fold: can I use just one of the output channels connected to a 12" woofer in parallel with a tweeter and let the other as spare and second, Do I need a crossover for the woofer and tweeter

Asked by: Ruli62
Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-05-09

Would it be ok to bridge the 2 channels by inverting one of the channels with a bridging adapter or a inverting op amp based circuit.   Then connecting the output of channel 1 to positive speaker terminal and connecting the output of channel 2 to the neg?

Asked by: Jesse055
Technically this will *Work* but it won't add any power as T- amps have common negitives I believe. I played with one and regardless of which negative lead I used nothing changed.
Answered by: Jirv0id
Date published: 2015-02-10
  • 2015-07-02T08:28CST
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