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

🎚️Adjustable low-pass filter

QAR 297

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Description

🎵 Elevate your bass game with power and precision — don’t let your subwoofer miss out!

COMPACT COOL - Sleek mini design with efficient Class D amplification keeps it cool and discreet.
PLUG PLAY UPGRADE - Breathe new life into old passive subs without the hassle of buying new powered units.
POWERFUL 100 W OUTPUT - Drive your passive subwoofer with clean, punchy bass that fills your space.
PRECISION BASS CONTROL - Fine-tune your low frequencies effortlessly with the dedicated low-pass filter knob.
VERSATILE MONO CHANNEL - Switch between subwoofer and full-frequency modes to match your audio setup perfectly.

The Fosi Audio M04 is a compact, high-performance mono subwoofer amplifier delivering 100 watts of clean power via a Texas Instruments TPA3116 chip and NE5532 op-amp. Featuring a user-friendly low-pass filter and sub frequency control, it enhances bass response for passive subwoofers with minimal heat output thanks to efficient Class D technology. Ideal for upgrading or repurposing existing passive subs, it offers professional-grade sound quality in a sleek, space-saving design.

Specifications

ASIN	B07942M4MC
Best Sellers Rank	#13,691 in Electronics ( See Top 100 in Electronics ) #57 in Audio Component Amplifiers
Brand Name	Fosi Audio
Customer Reviews	4.4 4.4 out of 5 stars (579)
Included Components	Fosi Audio M04
Item Dimensions	5.2 x 3.5 x 1.4 inches
Item Highlight	Digital Class D Integrated Power Amp for Passive Speakers Subwoofer with 19V/3.42A Power Supply
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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QAR 297

Duties & taxes included

In stock

Sold byAmazon QATARDelivered 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 QATAR.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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