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

🔊200W total output power

🔋Wide 12-24V DC input range

🎚️Adjustable treble & bass controls

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NZ$59

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Description

🎧 Elevate your sound game — power, control, and wireless freedom in one sleek amp!

BUILT TO LAST SAFE - Advanced protections guard against overheating, voltage issues, and reverse polarity for worry-free use.
SEAMLESS CONNECTIVITY - Bluetooth 5.0 with 49ft range plus AUX input ensures effortless wireless or wired streaming.
FLEXIBLE VOLTAGE RANGE - Operates seamlessly on 12-24V DC, perfect for diverse DIY setups and power sources.
POWERHOUSE PERFORMANCE - Delivers a robust 50W+50W stereo plus 100W subwoofer output for immersive sound.
TAILORED AUDIO EXPERIENCE - Fine-tune your sound with smooth treble, bass, and subwoofer volume knobs for theater-like clarity.

The DAMGOO 2.1 Channel Subwoofer Amplifier Board packs 200W total power with dual TPA3116 chips, supporting 12-24V DC input. It features Bluetooth 5.0 and AUX inputs for versatile connectivity, plus adjustable treble, bass, and subwoofer controls for a customized audio experience. Designed for DIY wireless speaker projects, it includes multiple safety protections and delivers crisp, distortion-free sound with professional-grade efficiency.

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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NZ$59

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered 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 New Zealand.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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