Description
Product Overview
The Fosi Audio M04 mono subwoofer amplifier is engineered for audiophiles who demand precise, powerful bass from a compact unit. Housed in a sturdy 5.2 × 3.5 × 1.4 inch aluminum enclosure, the amp weighs just 15.9 oz, making it easy to mount freestanding or integrate into tight spaces. Powered by a 12 V DC supply (19 V max), it delivers up to 100 W into 4 Ω loads, driven by a Texas Instruments TPA3116 Class D chip paired with a NE5532 op‑amp for ultra‑low distortion (THD ≤ 0.04%). A built‑in low‑pass filter and sub‑frequency control let you fine‑tune the bass response, while a selector switch toggles between dedicated subwoofer mode and full‑range mono output for versatile use.
Usage
Designed for both home theater and automotive environments, the M04 excels in rooms where space is at a premium and clean, deep bass is essential. Install it behind a bookshelf speaker, in a media console, or under a car seat to power a passive subwoofer and experience immersive low‑frequency effects during movies, gaming, or music playback. Its 12 V DC operation means it can run from standard wall adapters or vehicle power sources, making it a flexible solution for any audio enthusiast.
Why Choose Us
Fosi Audio combines high‑grade components with meticulous engineering to ensure reliability and performance. The M04’s Class D architecture provides high efficiency, reducing heat and power consumption compared to traditional amplifiers. Each unit undergoes rigorous testing to meet the specified THD and frequency range (20 Hz – 120 Hz), guaranteeing consistent sound quality. Backed by a solid warranty and positive customer reviews (4.5 stars from over 500 users), the M04 stands out as a trustworthy choice for demanding audio setups.
Key Features
- 100 W mono output with ultra‑low distortion for crystal‑clear bass.
- Built‑in low‑pass filter and sub‑frequency control for precise tuning.
- Compact aluminum chassis, lightweight and freestanding design.
- 12 V DC power supply (19 V max) compatible with wall adapters and car systems.
- Selector switch for subwoofer‑only or full‑range mono operation.
FAQ
What type of subwoofer can I connect to the M04?
The M04 is designed for passive subwoofers with an impedance of 4 Ω or higher. It works well with most home theater and car subwoofers that do not have a built‑in amplifier.
Can I use the M04 in a car audio system?
Yes. The amp runs on 12 V DC and includes a 19 V maximum supply rating, making it suitable for direct connection to a vehicle’s power source using the supplied power adapter.
How do I switch between subwoofer mode and full‑range mono?
Use the selector switch on the rear panel. In the “Sub” position, the low‑pass filter is engaged for bass‑only output. In the “Full‑Range” position, the filter is bypassed, allowing the amp to drive a standard mono speaker.
Is the M04 compatible with a home theater receiver?
Absolutely. Connect the M04 to the receiver’s pre‑out or line‑level output, then link the passive subwoofer to the M04’s speaker terminals for enhanced low‑frequency performance.
What warranty does Fosi Audio provide?
Fosi Audio offers a one‑year limited warranty covering manufacturing defects, along with responsive customer support for any installation or performance questions.
Reviews
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