ZK-502T Bluetooth Amplifier Board with Treble and Bass Control, TPA3116D2 50W x 2, DC:9-24V, Bluetooth 5.0 AMP Board for Home Passive Speakers
Condition: New
Buy Now, Pay Later
As low as
$4
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Monday, Oct 5
Features
- TPA3116D2 HIFI Chip Solution: Stereo Dual-channel Output to Ensure Continuous Serial High-power Operation, THD 0.1%. Wide Voltage Input DC: 9-24V;
- Treble & Bass Control: If You Are Tired of The Inherent High& Low Bass, Why Not Try The High & Low Control Knob! This Will Make You Feel Like Being In A Movie Theater.;
- BT and AUX Function: BT5.0 version, Transmission Distance Is Farther. The Transmission Distance Can Reach 49 Feet In An Open Environment. If your Play Device Does Not Have BT, You Can Also Input Audio Signals Through The 3.5MM Headphone Plug.;
- Safety Protection: This Amp Board Has Overheat Protection, Circuit Protection, Over-voltage and Under-voltage Protection;
- 7 * 24 Hours After-sales Service: Paying Attention To Customer Experience And Satisfying Customers Is Our Service Tenet. If You Have Any Questions About The Product, or The Product Has Quality Problems, Please Contact Us At Any Time, We Will Give You A 100% Satisfactory Answer.
Description
We are a team of DIY enthusiasts. We are as passionate and hands-on as you are. We also enjoy the fun that DIY brings to us and share the sense of accomplishment that DIY brings to us. We are committed to providing customers with simple design, humanized operation, and cost-effective products and services, so we hope that your shopping experience is also full of fun. Allowing you to have more sound choices. A small amp can also create a small movie theater for you. If you give it enough energy, with 5 inches -6.5inch speakers, it can give you a value for money experience. Launched by TI, with very high index parameters. The highest modulation frequency can reach 1.2MHZ, and the high-power output distortion is less than 0.1% Make wiring more convenient without damaging the wires. 5.5mm * 2.1mm DC interface, suitable for most notebook power adapters. Warm Reminder: The power switch on the board is a standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug it for a long time, you can unplug the DC plug on the machine. Properly increasing the voltage or reducing the speaker impedance can effectively increase the output power. Packing Include: 7 * 24 Hours After-sales Service:
Item dimensions L x W x H: 4.33 x 2.76 x 0.83 inches
Voltage: 24 volts
Manufacturer: DAMGOO
Maximum Supply Voltage: 24 volts_of_direct_current
Minimum Supply Voltage: 9 volts_of_direct_current
Voltage: 24 volts
Maximum Supply Voltage: 24 volts_of_direct_current
Minimum Supply Voltage: 9 volts_of_direct_current
Mounting Type: Surface Mount
Number of Channels: 2
Item Dimensions: 4.33 x 2.76 x 0.83 inches
Specification Met: Industry Standards
Manufacturer: DAMGOO
Model: ZK-TB21
Brand Name: DAMGOO
Global Trade Identification Number: 48
Item Weight: 111 g
Part Number: ZK-502T
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 5
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Top Amazon Reviews
I have the DAMGOO ZK-502T and the ZK-1002 digital amps. They are both great running on a 16V laptop supply. Both provide plenty of volume. I have bought class-D for the TV and for the garage, and I got great results. I needed replacements due to a house fire. ** After a few weeks, mine failed. The BT "ready" signal continued to beep, interrupting music play on the wired input. BT has priority, and if it fails to connect, well, you are stuck with repeating beeps. Amazon Chat support quickly arranged for a warranty replacement with return of failed item. Replaced item works fine. ** The directions for these talk about what size of speakers they will support, and that small speakers require less power. This isn't right. The truth is that larger speakers are generally more efficient. In fact, if you have very large, efficient speakers, you can probably drive them straight out of your computer's sound card. I've done it. Your speakers will make all the difference; get good ones. If you go to a thrift store, only get a name brand like Sony, Aiwa, Yamaha, KLH, Pioneer. Never a lesser brand like Sharp or RCA. I have good quality 8 Ohm Yamaha speakers. Now I'll focus on the differences between these two that I think are most important. ZK-502T pro: bass and trebble controls! I like the flexibility. con: lame stick-on heat sink, probably should lay it flat. Better yet, mount with real thermal tape. ZK-1002 pro: larger screw-mounted heat sink, suitable for mounting in any position. Good, because mine is outside and exposed to the summer heat. pro: neat looking inductor coils, but I can't hear the difference. ZK-502T Current test with 2x 18650 cells (8 Volts) at 50% physical volume Average values: 50mA idle/quiet BT 100mA 50% vol BT 200mA 75% vol BT (with 1 Amp peaks) 600mA 80% vol BT (with 2 Amp peaks) 2500mA peak at 100% vol BT Recommended for long battery life: 2x 18650 cells with 2500mAh capacity, 12 to 24 hours runtime depending on volume. Better than some products off the shelf. Common A/C power supply recommendations: Minimum: 9V 1Amp Also suitable: 12V 3Amp, 16V 4Amp For 6dB greater distortion free volume: 19V 4.5 Amp The biggest difference between power supplies is that the audio is 6dB louder at most at 16V plus. The power regulator stays cool at 9V and begins to heat up at 16V. The main chip stays cool at 9V, and at 16V heat begins to build up as it is slowly dissipated through the board and components. I used a thermal camera to check this, and max temp I ever saw was a moderate 100 degrees F. Loud volume with a weak 9V supply can cause it to fail and restart. So only use a weak 9V supply if you plan on listening at moderate levels. With my 16V supply, there is sufficient current available for very loud music with no interruptions. Higher voltage is required for more volume, but results in more heat. At 16V, temps reach 115 degrees F. Semiconductors can take much more heat, and the main TPA311 chip has thermal protection. So these measurements are only for your information. The supplied stick-on heat sink didn't heat up much -- it is for show. Heat is also dissipated from the main chip through the board, however. I scraped off the black adhesive and used thermal tape instead -- with better results. I recommend you do this if you use a 24V supply. The reason I tested current usage was to confirm what I suspected -- that these amps are very efficient and require little power. I also wanted to know my battery life. I recommend 2 18650 cells. More than that will offer more volume, but will shorten battery life, as more power will be wasted in the power regulator. My AUX audio source is a Sony walkman mp3 player. Your source and/or a higher voltage power supply could get you more output power. But I believe it would never be close to 25 Watts, and this is something we should all be aware of. Bluetooth devices with Aux capability usually have better performance on BT. This amp is no exception. Idle power use is lower and audio is clearer at low levels. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - More testing with a 12V battery and a new setup. See photo of my weekend project: Li-Ion battery, solar power, handy carry handle. With the battery disconnected, and in direct sun, the panels power this at medium volume. With the battery connected it extends battery life. Estimated life of 20 hours. (No time limit while in direct sun.) Approximate current used: BT 22mA (OFF) idle 50 mA low volume 75 mA medium volume 200mA loud volume 600 mA Current peaks at 2A before distortion sets in. Any supply with at least 2 Amps and a minimum of 9V should be good for a quiet location, 16V if a bit more volume is desired for a loud location. (edited) Good luck and have fun! -Chris
...
show more
Reviewed in the United States on February 21, 2021 by Christophe
The best mini amplifier on the market for the price. Made a box out of walnut with some mdf for the guts. Matted it to some 3.5 kicker drivers with tweeters and it sounds amazing. Used a 18v makita battery with a Amazon adapter and works wonders. 6ah battery should last hours. Bluetooth connects very quickly.
...
show more
Reviewed in the United States on June 29, 2024 by Handcrafted by Amiri
Overall this has been a great addition. I had some 6x9 speakers in boxes sitting and this amp let me hook them up to my computer very easily. The sound has been great with one minor issue. There is a noise gate that will shut the sound off when no sound is being played. However, if there are quiet sections the noise gate activates and cuts the sound off. Normally it comes back quick and correct but sometimes it doesn't. So there are times the speakers shut off and you lose audio. Or it will come back after half the dialog has been spoken.
...
show more
Reviewed in the United States on March 25, 2025 by David M
I really only have one complaint. It arrived fine when I went to unscrew the speaker screws to insert the speaker wire using the screwdriver that they sent me the screws were on there so hard it's stripped out the screwdriver luckily I had a backup. The other complaint that I have really is that the power wire is so thin. But other than that I love this little amp. I used it on a 12 volt battery they recommended higher. For test run I did what they told me not to do and hooked up a 6-in speaker or a subwoofer just to see how good it would handle the bass. It handled it fine. Being able to turn down the base is actually a real good option to have. The same with the treble. I will say with two 3-in speakers I could actually hear it when I was 20 feet away. The little amp is so compact it made it great for the installation on what I wanted to do as you can see in the pictures it's actually installed on a scooter underneath the battery area which kind of doesn't seem like it's so smart but there's a clearance it doesn't get hot. And today I might finish the installation but I just wanted to say that for 20 bucks honestly there's no complaints I love this little amp and you should really think about buying it.
...
show more
Reviewed in the United States on September 12, 2020 by Troy
The amp is small and light, in my use it didn't get too hot, it has two impedance ratings its compatible with 4Ohms and 8Ohms, one channel I was running a woofer rated at 150-watt power at 4 Ohms even though this amp only pushes 50 watts at that impedance the sound quality wasn't too badly affected. I used the second channel to run two small 4Ohm speakers in series and they sound great, overall I think I've used this amp to its limits, up to this point a few weeks in everything seems great. If you are looking for something small and lightweight with a very quick Bluetooth connectivity this is a good buy for the price, Cons; The turn knobs are cheap and don't line up well even if you spend time trying to, but these amps are usually hidden away, the assembly is only shown in a picture, but still, it was really easy to figure out.
...
show more
Reviewed in the United States on April 8, 2021 by Asif
Nice basic amplifier with Bluetooth for the Money. I used it to power a pair if Pioneer speakers for my entertainment system in my camper. Has good sound quality with base and treble control but don't expect it to rival a full size amplifier. It is compact, has low power consumption and was easy to setup. and I can also stream audio from my phone or tablet to it using the Bluetooth connection which is a nice extra. Worked great for my application.
...
show more
Reviewed in the United States on October 2, 2020 by R
It works as described, but it's not that well designed. The knobs are too close to each other so it's easy to accidentally move the wrong knob, and the volume knob is small but extremely sensitive, so it's hard to get the correct volume you want. The amp takes over 10 seconds to actually turn on the aux input when you turn it on, which feels annoying when I'm used to amplifiers turning on immediately. It's also not actually that small when you consider the power supply. The power supply is separate, and so you end up with a lot of wires. Other amps may be a little bigger, but they have the power supply built-in, which I find much more convenient. If I were buying an amp like this again, I'd spend a little more for one of the Pyle models. They have built-in power supplies, better panel designs, and more features like the ability to play files off a USB stick.
...
show more
Reviewed in the United States on November 17, 2022 by Paul Slocum
It worked out of the box. Sounds good. The Bluetooth has trouble pairing with my iMac sometimes, but it could be my old iMac's fault.
Reviewed in the United States on July 29, 2025 by mm4660