Will this power up passive subwoofers ?

Yes, absolutely. That's the reason I bought it and it works just fine without spending a whole lot of money.

How hot does this amp run? The unit I currently use is very hot to the touch even after a short while.

This thing seems cool no issues

What is the input voltage range?

Not sure what your question is about. If you mean input power, it's spec'd. at 12-24 vdc. It comes with a power brick rated at 19 vdc, 4.47 amps. Input sensitivity is =< 280 mv...

I have a Harman Kardon reciver with a single rca sub connection. What cables do i need to hook my sub to this amp and the amp to my reciever

You need 1/8 audio plug to RCA adapter ..

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M04

Q: I have a Harman Kardon reciver with a single rca sub connection. What cables do i need to hook my sub to this amp and the amp to my reciever

You need 1/8 audio plug to RCA adapter ..

Product ID: 58115674

Details

Item dimensions L x W x H
5.2 x 3.5 x
Manufacturer
Fosi Audio
Maximum Supply Voltage
19
Minimum Supply Voltage
19
Voltage
12

⚡100W output power

🧊Cool-running Class D tech

🎚️Bass/full-frequency mode switch

S$113

Duties & taxes included

In stock

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Description

🎵 Unleash the bass beast in your home theater!

POWERFUL 100 W OUTPUT - Drive your subwoofer with clean, punchy bass that fills the room.
DUAL MODE BASS CONTROL - Switch effortlessly between subwoofer and full-frequency modes for tailored sound.
COMPACT ROBUST DESIGN - Fits seamlessly into any setup without overheating or bulk.
PLUG PLAY CONVENIENCE - Complete package with power supply and manual for quick, hassle-free setup.
CRYSTAL CLEAR LOW FREQUENCIES - Experience deep, distortion-free bass thanks to premium TI and NE5532 chips.

The Fosi Audio M04 is a compact, high-performance mono subwoofer amplifier delivering 100 watts of clean power via advanced Class D technology. Featuring a versatile bass/full-frequency mode switch and premium TI TPA3116 and NE5532 components, it enhances low-frequency sound with precision and clarity. Designed for passive subwoofers, it offers a robust yet space-saving build with an included power supply and user manual, making it an ideal upgrade for any home audio system.

Specifications

ASIN	B07942M4MC
Best Sellers Rank	#16,595 in Electronics ( See Top 100 in Electronics ) #72 in Audio Component Amplifiers
Brand Name	Fosi Audio
Customer Reviews	4.4 4.4 out of 5 stars (548)
Included Components	Fosi Audio M04
Item Dimensions	5.2 x 3.5 x 1.4 inches
Item Weight	450 g
Manufacturer	Fosi Audio
Maximum Output Power	100 watts
Maximum Supply Voltage	19 volts_of_direct_current
Minimum Supply Voltage	19 volts_of_direct_current
Model	M04
Mounting Type	Freestanding
Number of Channels	1
Number of Items	1
Output Power	100 watts
Part Number	M04
Specification Met	[Inf] Thd <= 0.04% and Frequency Range 20hz - 120hz
Unit Count	1 Count
Voltage	12 volts_of_direct_current
Warranty Description	18-month manufacturer

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