Does it come with a power cord ?

No, you can use a 19v laptop charger but to get this thing fed what it needs buy a 24v 250watt power supply.

What is the low pass cut off for the subwoofer?

The frequency of the bass channel is 20hz-200hz

Would I be able to hook up a regular speaker to the "subwoofer" channel, if I wanted to individually control the volume of that one speaker?

The answer that specifies your frequency limitations is correct. If you connect a full range speaker, it will not sound good. But you can if you don't care about sound quality, in which case you should just go back under your rock and stay there.

I would want to use this for aux input only. can i set it to default to aux input? or do i have to switch from bluetooth to aux each time i power on?

It comes default in aux , there is no such switch for it , to answer your question in simple words, when you get it just connect the aux to it and don't werry about nothing else.

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ZK-TB21

Product ID: 213403491

Details

Item dimensions L x W x H
4.72 x 3.94 x
Manufacturer
DAMGOO
Maximum Supply Voltage
24 Volts (DC)
Minimum Supply Voltage
12 Volts (DC)
Voltage
24 Volts

⚡Wide 12-24V DC input voltage

📶Bluetooth 5.1 + external antenna for superior range

🔊200W max output power

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$U2024

Duties & taxes included

In stock

Sold byAmazon UruguayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Elevate your audio game with power and precision—don’t just listen, experience!

BUILT TO LAST - Equipped with advanced safety protections including overheat, reverse polarity, and voltage safeguards for reliable, worry-free operation.
SEAMLESS CONNECTIVITY - Bluetooth 5.1 paired with an external IPX antenna ensures stable, extended wireless range—ditch the wires without compromise.
POWERHOUSE PERFORMANCE - Delivers a robust 200W output for immersive sound clarity and volume.
VERSATILE COMPATIBILITY - Supports both Bluetooth and 3.5mm AUX inputs, effortlessly connecting to smartphones, TVs, and laptops.
CUSTOMIZABLE USER FRIENDLY - Personalize your Bluetooth device name and enjoy hassle-free setup with freestanding mounting and wide voltage support.

The ZK-TB21 is a 2.1 channel Bluetooth amplifier board delivering up to 200W output with Bluetooth 5.1 and AUX connectivity. Featuring a TPA3116D2 HiFi chip for low distortion, it supports a wide 12-24V DC input and includes an external IPX antenna for enhanced wireless range. Safety protections ensure durability, while customizable Bluetooth naming and broad device compatibility make it a versatile choice for audiophiles seeking powerful, reliable sound amplification.

Specifications

ASIN	B0FN8CXZSY
Best Sellers Rank	#22,606 in Electronics ( See Top 100 in Electronics ) #153 in Audio Component Amplifiers
Brand	DAMGOO
Brand Name	DAMGOO
Customer Reviews	1.0 out of 5 stars 1 Review
Item Dimensions	47.24 x 39.37 x 8.66 inches
Item dimensions L x W x H	47.24 x 39.37 x 8.66 inches
Manufacturer	DAMGOO
Maximum Output Power	200 watts
Maximum Supply Voltage	24 Volts (DC)
Minimum Supply Voltage	12 Volts (DC)
Model	DAJUNGUO ZK-TB21
Mounting Type	Freestanding
Number of Channels	2
Output Power	200 Watts
Part Number	ZK-TB21
Specification Met	Amazon's Standards
Supply Current	5 Amps
UPC	194852391963
Unit Count	1.0 Count

Reviews

C**A

Poor quality, pay more for a better product

Amp stopped working the day it arrived

24.03.2026

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$U2024

Duties & taxes included

In stock

Sold byAmazon UruguayDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Uruguay.

Secure transaction

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