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2x100W at 4 Ohm TK2050 Class-D 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.  
List Price$79.95
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Your Price
Buy 4-up$34.98
Part # 320-334
Qty:  EA
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Product Details

2x100W at 4 Ohm TK2050 Class-D 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 TP2050 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 TP2050 eliminate your worry on heat dissipation
  • Over/under voltage turn-off
  • Over-current protection
  • Over-temperature protection

Product Specifications
  • Power Output (RMS Per Channel @ 8 ohms)40 Watts
  • Power (RMS/Channel 8 ohms)26 - 50 Watts
  • Special FeaturesBoard Only Module
  • Weight Range< 10 lbs.
2x100W at 4 Ohm TK2050 Class-D Audio Amplifier Board Only
  • BrandParts Express
  • ModelAA-AB32186
  • Part Number320-334
  • UPC844632095771
  • Product CategoryAmplifiers
  • Unit of MeasureEA
  • Product Rating
    (10 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-D Audio Amplifier Board Only
2x100W at 4 Ohm TK2050 Class-D Audio Amplifier Board Only is rated 4.5 out of 5 by 10.
Rated 5 out of 5 by from Very Good soundI have 2 tuba amps which costs several 100 euro each.But this amp seems to beat them.....Never expected this quality.
Date published: 2013-10-02
Rated 5 out of 5 by from very nice amp - runs cool and quieti'm using this with a switch to turn on eight speakers (2 at a time). it is really more than i had expected. need to look into the factory tuning mentioned here - will probably pull off the heat sink and take a look.i got some good advice from an engineer at parts-express too. just having 60 seconds to run an idea by someone was worth a lot.
Date published: 2013-11-20
Rated 5 out of 5 by from Stage monitor amp.Got one of these from a friend. I had a all 2-4" speaker stand mount personal monitor filling a dead spot. Added this amp and an Load. Perfect. Clean and reliable.
Date published: 2013-06-21
Rated 4 out of 5 by from Wow this sounds niceI docked it a star because the volume control does not work with it (sold separate). I docked it's features because it has no gain control. Previous models have more features, features I wanted. That model is 14 v and wouldnt work for me.That said, this thing is ridiculously nice. You will land up tuning the DC offset. out of the box one side on mine was tuned perfectly, the other was at 40mv which is pretty far out. At 50mv you can hear it, and above that you may damage your speakers. This also accounts for a feature star being removed. You need to remove the heatsink to tune it , the directions say its factory tuned. It is not. It still sounds out of hand good before tuning it , but it should be tuned as the factory says it is. This is sure, not PE dropping the ball and PE should be speaking to them since they are not doing it.In the big picture this is of tiny importance unless it is farther than 40mv out and you can tune it. For the money this is a small price to pay for the amazing sound this amp makes. Granted I have some really nice speakers but as others note it does a nice job even with homemade speakers.Highly recommend , as long as you dont mind no volume control, its perfect for a Pi or mp3 player or what ever you want amazing stereo sound in.Even the box tells you it is nice.Ideally a 12 v version that accepts the volume control would be available , for my use case but this worked out perfectly in the end. You can control the volume in XBMC on the pi by hitting - or +. The drawback is it gets loud quick. For night time listening in an apt, I find the volume is usable for about 0-5% on the pi. Any more than that and its just too loud. For daytime listening it is 'loud' running 8 ohm speakers at about 30-40 %.The sound is seriously astonishing. If you have any hum it is not the amp, try a ground loop isolator.
Date published: 2013-07-06
Rated 4 out of 5 by from Love the BIG sound from a little package.I'm powering the 2x100 amp with only 12V using an old computer switching power supply and the sound is great. My source is my 50 in TV above the fireplace, using a couple of box speakers on the book shelves on each side. The stereo, and frequency response is really great.
Date published: 2013-11-20
Rated 5 out of 5 by from Great soundI got my amp in today.Just for grins I tried it with ten volts on a bad battery.Hooked to a Dell laptop with a cheap Beringher DAC. Playing FL format music.I didn't like it.I took a 12 volt battery out of my truck.I didn't like the sound.Then I hooked my special 30 VOLT DC power supply up with 66000 UF electrolics and some mods. So now it will be used more than my Dayton APA 150 power amp because the sound is so much better,I used to build class A amps years ago but this sound is better .( I think) Oh I use VLC player and it serves as the pre amp and volume control.I never use tone controls of any kind. The only thing I don't like is the tiny coax power connection.I plan to take it off and connect direct.I used a short wire but still don't like the coax.This amp is the size of a Prince Albert tobacco can.It amazes me of the sound quality this small thing is capable of.The old amps I built were much larger and had very large heat sinks and TO 60 outputs..The best sound was thru double Arua 6 inch woofers Dayton factory xovers and cheap tweeter I bought elsewhere.The towers are four ft high and specially designed baffles. I like it when these kinds of things happen.I had to listen to favorites all over again. Thanks to the man in California AJH? and the other in Northwest Ohio Nibnut? who answers questions here.
Date published: 2013-05-10

Product Q&A

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

Constant Power Supply to Amp

Hopefully someone can help me with this one, this unit seems perfect for my needs except for one little catch.I'm looking to use this for a remote PA style system, where the amp will have a line in signal sent to it from a computer quite a distance away to the amp and then a short run from the amp to the speakers. What I need to know is, regardless of the power supply I decide to use, I have no way of turning the unit off and on to receive the music. Which means that while there is no audio line being sent to it to amplify, it will still effectively be turned on. Is this going to harm the amplifier?If it will does anyone know of a solution or different user that sort of goes into standby when there is no line in source?Appreciate any advice anyone can give.
Asked by: Darktorana
No problem amp is on standby when no input signal is present.
Answered by: Nitnub
Date published: 2013-06-03

car audio install

Hi there, will this amp work on a car audio installation work with a standard 12v to 14 v? regards
Asked by: wurz
Yes. But do read the manual - there is a lot of detail on the power supply. You must have a good power supply for stable current delivery, and batteries that maintain voltage. If you don't, you'll experience clipping, soft distortion and less than full output. Mobile amps have very specific power supplies - study them all and have fun with your project
Answered by: MarkAJH
Date published: 2012-07-31


I want to use this amp with a 24 VDC battery charger@10 amp . and filter the output with two 33000 uf computer grade electrolics. Do you have a problem with that?I only guess that the PS needs 24vdc plus and minus because i see the tiny little coax socket is recommended as input. .By the way, Class d? I am after high quality reproduction of my music.Is this as good as my Dayton APA 150?
Asked by: clod
There are many configurations to power an amp board. Unless you are doing an exotic mobile application - I suggest you stay with the recommended specs and proper boards to assure amp performance. As for sound quality. Class D is typically used for subwoofers and car audio due to the high output and low power consumption capability. With the exception of very expensive Class D amps (talking over $1000), traditional Class AB designs will be more musical. If that is your goal - the Dayton 150 will be the better choice.
Answered by: MarkAJH
Date published: 2013-01-23

What is this board intended for?

Im confused, it is listed under 'home electronics', but it says DC as the power supply and everyone is mentioning batteries. Doesnt that mean its for use in an automobiles system? If so ignore this next question, if it can be used in home setups, where is the plug? Im new to this so go easy on the insulting remarks about my ignorance.
Asked by: jeessse
There are a lot of products at PE that may appear new - it's like anything - until you become aware of or familiar with - it's an odd looking device. Can you imagine showing an iPad to someone 20 years ago? Same thing. So you're okay. So if you were to open a stereo receiver - you'd probably find a board in there similar to this in appearance. That is the "amplifier" section. You have up front the controls and tuner, the preamp and volume control, then the amp which runs the speakers. And an amplifier board needs power. So typically one corner of a receiver is heavy. There's a power supply there that plugs into the wall to feed not only the entire receiver - but the power amp board as well... So to make this TK2050 board work - you need a source with volume control, the board itself, a power supply and speakers. Some guys use them at home with power supplies that plug into the wall, others are doing creative mobile things with them using batteries - a bit trickier. As a novice - this may be something a bit too adventurous for your first project - start off by reading all the QA threads on this and the other boards. You will learn a lot from the conversations. Good luck with your project.
Answered by: MarkAJH
Date published: 2013-06-21

No Audio or Turn-On Pop from Amplifier Module...??

I am not getting anything out of either output section of my amplifier module. Status LED comes on, as does the Fan, but still no "turn on pop" or audio whatsoever. My plan was to use this with a 12V supply, going against recommendation, for use with a battery. I have tested the amplifier with a 12VDC2A power supply, 12.4VDC5Ah Lithium Ion Battery, and 24V2.5A power supply. Every power source seems to turn the status LED on and start the Fan, but still no audio or turn on pop. Any suggestions? Theres a pin that reads "mute" on the PCB, but its next to a +5V pin?? I can't seem to find any information on installing a Mute switch anywhere. Why no audio or pop?
Asked by: xpheolix
My guess is that you are expecting a noise when you turn it on. Try an input to test operation. If that fails contact PE tech for possible exchange.
Answered by: Nitnub
Date published: 2013-05-02

Can the 5+ and "mute" be used to power a 5v 180mA bluetooth receiver?

There's no details in the manuals for what these ports are intended for.I tried bypassing my bluetooth receiver's power supply and using this... it works but with a TON of noise. Any ideas why?
Asked by: Dozer
A momentary contact switch wired between this +5 and mute pin may allow for a mute feature to be engaged. Please I state MAY and circuit tracing would be needed to determine the function.If you measure the+5 pin and it was sufficient to power your Bluetooth then go for it. Do not use the mute pin. Use w common ground.
Answered by: Nitnub
Date published: 2014-02-23

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