Will this work with powered subwoofer? Passive suboofer?

A Passive subwoofer would be my recommendation, the passive subwoofer depends on an external amplifier and this would be the external amp. If you use an Active subwoofer; it contains a built-in amplifier and the result would be overpowering the subwoofer and you will get adverse effects

Does the amp have a fuse?

Your question does Not specify your concern for a fuse on the Power input or on the Speaker Output section ? Answer: No fuse at all, the circuit with a 12 VDC 2 amp or above 18~24 VDC Power supply adapter does not get warm at all; it has a very good Audio quality response as well as the Output Power volume for its size. It is an excellent amplifier. with 12VDC supply - 15Watt Output Power up to 24VDC supply - 50Watt Output Speakers Power and the Subwoofer power Output ranges from 20W ~ 100W output Power depending on the Power supply input.

how high does the subwoofer lowpass go? Can i push it up to around 500hz, or does it stop at, say, 150hz?

It can't 500hz, only be used in the range of 20-200hz.

Are the main L&R speakers full-range or high-passed? If they are high passed what is the cutoff frequency?

Both channels are full range, with separate bass/treble controls. I don't know what frequency the controls are biased at.

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MakerHawk copper Bluetooth Amplifier Board Hifi Stereo 2.1 Tpa3116D2 2X50W+100W 12V-24V Audio Power Amplifier Module Bass And Treble Control For Store Home Theater Speakers

Product ID: 384175897

Details

Item dimensions L x W x H
11.8 x 10 x
Manufacturer
MakerHawk
Maximum Supply Voltage
24 Volts
Minimum Supply Voltage
12 Volts (DC)
Voltage
24 Volts

📶Bluetooth 5.0 for extended range

🔊2x50W + 100W power output

🛡️Multi-layer protection system

€ 58.56

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Elevate your sound game — because your space deserves pro-level vibes!

DURABLE COPPER BUILD - High-quality copper connectors and terminals guarantee heat resistance and long-lasting performance, perfect for professional setups.
IMMERSIVE HI FI SOUND - Experience crystal-clear stereo with 2.1 channel 200W power output that fills any room with rich, balanced audio.
ROBUST PROTECTION TECH - Advanced short-circuit, thermal, and voltage safeguards keep your amplifier safe and reliable for years of premium use.
PRECISION AUDIO CONTROL - Customizable bass, treble, and volume knobs let you tailor your soundscape to match your mood or environment effortlessly.
SEAMLESS WIRELESS CONNECTIVITY - Bluetooth 5.0 ensures stable, long-distance streaming so you never miss a beat during your work or unwind sessions.

The MakerHawk Copper Bluetooth Amplifier Board is a high-performance 2.1 channel Class D amplifier delivering 2x50W + 100W output with Bluetooth 5.0 connectivity. Featuring advanced protection mechanisms and customizable bass and treble controls, it’s designed for home theaters, stores, and speaker systems requiring clear, powerful audio with durable copper connectors for reliable, heat-resistant operation.

Specifications

ASIN	B08H1N7SSC
Best Sellers Rank	#10,152 in Electronics ( See Top 100 in Electronics ) #3 in Speaker Parts & Components
Brand Name	MakerHawk
Customer Reviews	4.1 4.1 out of 5 stars (891)
Included Components	1 electronic component amplifier
Item Dimensions	11.8 x 10 x 2.2 Centimeters
Item Weight	195 Grams
Manufacturer	MakerHawk
Material Type	Copper
Maximum Output Power	100W
Maximum Supply Voltage	24 Volts
Minimum Supply Voltage	12 Volts (DC)
Model Number	ZK-TB21
Mounting Type	Surface Mount
Number of Channels	2
Number of Items	1
Number of Packs	1
Output Power	150 Watts
Package Type Name	box
Part Number	10I34BGJ184YZ
Specification Met	Meets certain specifications
Supply Current	5 Amps
UPC	738582506800
Unit Count	1.0 Count
Voltage	24 Volts

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