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AEXCVG

ZK‑HT21 Bluetooth Amplifier Board,160W×2+220W 2.1 Channel Amp Module Subwoofer Output Treble Bass for Passive Speakers

Based on 65 reviews
Condition: New
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$32.99
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 31
Order within 12 hours and 33 minutes

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At a glance

Condition
New
Model
ZK-HT21
Maximum Supply Voltage
36 V DC
Minimum Supply Voltage
15 V DC
Mounting Type
Surface Mount
Maximum Output Power
540 watts
Specification Met
FCC
In the box
screwdriver

Features 5

  • AUX,Bluetooth,USB and Subwoofer Inputs: This mini bluetooth amplifier board integrates AUX, Bluetooth, USB and dedicated Subwoofer Inputs. It features a 3.5MM AUX port to connect your cellphone, laptop or TV (AUX cable not included). Equipped with Bluetooth 5.0, it supports fast connection within 10M/32FT unobstructed range. USB and Subwoofer Inputs are available on demand. Great for home stereo audio DIY projects. Note: When using AUX mode, please disconnect the modules Bluetooth connection first;
  • Perfect Protection Mechanism: This Bluetooth amplifier board comes with multilayer safety protection, including overvoltage, undervoltage, overheating, DC detection and shortcircuit protection. It will automatically activate protection to avoid board damage under overload conditions;
  • TDA7498E Chip: This 2.1 channel bluetooth amplifier board adopts two original imported TDA7498E chips. This 2.1 bluetooth amplifier delivers max 160W for left channel, 160W for right channel and 220W subwoofer amplifier output. Ideal for your diy amplifier kit build.
  • Compatible Speakers: The Bluetooth amplifier board fits 30200W, 48 passive speakers only. NOT compatible with active speakers or builtin Bluetooth speakers. It works with DC 1536V power supply; higher input voltage brings higher output power.

Description

Equipped with two TDA7498E chips,the 2.1 channel Bluetooth amplifier board has peak power up to Left and right channels≤160W,Subwoofer≤220W. This Power Amplifier Board has several inputs: Bluetooth 5.0, USB Flash Drives,3.5mm AUX and Subwoofer Input . If you use the AUX mode, please make sure the Bluetooth connection is disconnected. Overvoltage，Undervoltage，Overheat，DC detetion，Short circuit protection Power Amplifier Board * 1 Protective Shell * 1 Set Screwdriver * 1 Knob * 5 Unobstructed，within 32 FT/10 M

Specs 14

Manufacturer AEXCVG
Maximum Supply Voltage 36 V DC
Minimum Supply Voltage 15 V DC
Mounting Type Surface Mount
Brand AEXCVG
Number of Channels 3
Maximum Output Power 540 watts
Specification Met FCC

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 31

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Compact amp and sounds great!
My SA100 Dayton Audio subwoofer amp starter making terrible random popping and humming noise even when the soundvar feeding a sub signal to it was turned off so this little amp to the rescue. Lol. This thing is sick. Very compact and seems to be a quality built part. The plastic knobs feel and look cheap but I'm sure they'll be fine. Sounds great. Makes me subs sing and I can power a couple of bookshelf speakers with it. I also like the Bluetooth option. Only wished it had a remote control not sure if there is something I can add to it. Excellent value. I'm powering mine with a 36V power supply. Let's see how long it lasts. Hopefully longer than the SA100 did. ... show more
Reviewed in the United States on April 5, 2026 by Google123
Great amp
This amplifier exceeded my expectations for my DIY speaker build. It delivers clean, powerful sound with plenty of headroom, and the audio stays crisp even when I turn the volume up. Installation was simple, everything worked right out of the box, and it has been rock solid ever since. If you're building a custom speaker and want great performance without spending a fortune, this amp is an excellent choice. I would definitely use it again on my next build. ... show more
Reviewed in the United States on August 1, 2026 by Kara
Really good amp for the price
It's been outside for a few months now. No issues. Works great but you really need a beefy power supply for it to work really good. I literally have a old theater 2.1 set up powering 2 tower speakers and a 12 inch sub. And all speakers are to the specifications of the amp so it's running them like a champ. And loud. Sounds clean no ground noise bluetooth is good n stable. The amp has never shut down or over heated on me. Again you need a big power supply for it I used a old 24V but if you have a higher voltage one even better just don't go over the max rated voltage the amp is rated for. You will fry it. Highly recommend it but if you don't have a extra power supply it will probably cost more than the amp for a 24V or higher PSU. You can use a weaker PSU but it could make your speakers sound bad or over heat your power supply causing it to shut down it depends how much power your speakers can pull. Small speakers it's fine, for bigger ones and subs you will need higher voltage PSU. ... show more
Reviewed in the United States on April 5, 2026 by A.K.
Nice set up
Replaced with same model I bought about three years ago. I think I burned it up with my subwoofer set too high or something. New one looks good and sounds great. I love this set up where it’s out of sight in my vehicle. Make sure you get a good quality speaker that can handle low to average input.
Reviewed in the United States on February 25, 2026 by Theodore A. Greenman
Cool
It is really awesome, It sound good and clear, it makes my subs move way more than my old amplifier, but there is one issue, every time when a video or a music audio goes silent for a sec, there is a little delay every time, I doubled checked to see if it was just the music I was listening but no it was the amp. But overall it is a great little stereo system, pretty affordable, other than the delay it works really well, I would buy another one. ... show more
Reviewed in the United States on January 26, 2026 by Cool
Quality product impressive sound
I've bought a couple of these and they are pretty impressive for the price, unfortunately the last one I bought had some issues but returning felt fairly simple other than the drive across town and waiting to have my money returned so I can make another purchase in my pursuit of customized portable sound systems. ... show more
Reviewed in the United States on June 2, 2026 by Randolph
Great sound
With the right power supply this far exceeded my expectations. Awesome wee amplifier!
Reviewed in the United States on July 28, 2026 by Lyndon Jackson
Good audio output
Great for your money I built a party box out of it works amazing haven't had any problems with it it does rattle a little bit but nothing bad
Reviewed in the United States on July 19, 2026 by Logan
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