Fosi Audio M01-BT Bluetooth Subwoofer Amplifier 300W

The Fosi Audio M01-BT is a compact Class D 300W amplifier that adds Bluetooth 5.0 to drive passive subwoofers or deliver full-frequency mono output for home theater and bass shakers.

This small but powerful amp combines modern wireless convenience with flexible wired connections so you can build a tidy, high-impact low-frequency system. It accepts Bluetooth and RCA sources, offers a switchable PBTL/full-frequency or dedicated SUB mode, and includes bass gain control to tune low-end response. The M01-BT is intended for passive subwoofers, passive speakers in mono, or for integrating with an active subwoofer via RCA—note it is not suitable for active (self-powered) speakers as the main speaker output.

How does the M01-BT add Bluetooth to a subwoofer setup?

Bluetooth 5.0 on the M01-BT lets you stream audio from phones, tablets, or computers without extra adapters. Pairing is straightforward, and once connected the amp accepts wireless signal while still providing RCA inputs for traditional wired sources.

• Bluetooth 5.0 for stable wireless streaming
• Rear antenna improves reception in typical home rooms
• Switchable to accept RCA source when you prefer wired connection
• Simple pairing process and visible connection status

What power and performance can I expect from this mini Class D amp?

The M01-BT uses the STMicroelectronics TDA7498E chip in a compact Class D design to deliver up to 300 watts peak power suitable for driving subwoofers and mono speaker setups. Class D efficiency keeps the unit small and cool while producing strong low-frequency output for home theater or tactile bass applications like bass shakers.

• High-efficiency Class D topology reduces heat and size
• TDA7498E-based amplification for robust bass punch
• Up to 300W peak output to handle demanding low frequencies
• Includes 24V/4.5A adapter for consistent power delivery

How do the SUB and PBTL modes change how I hook up speakers?

The rear switch lets you choose SUB (dedicated subwoofer) or PBTL (parallel bridged mono full-frequency) operation. SUB mode optimizes the amp for driving a single passive subwoofer, while PBTL mode turns it into a mono full-range amplifier for a single passive speaker or bass shaker.

• SUB mode: RCA or speaker terminals for a passive subwoofer
• PBTL mode: bridged mono output for full-frequency single-speaker use
• Banana plug or bare-wire speaker terminals for secure connections
• RCA output option to feed a powered subwoofer if needed

What controls and connections are available for tuning and integration?

The M01-BT provides a front-panel bass gain knob for easy low-end adjustment plus RCA input and speaker binding posts for flexible wiring. The included Bluetooth antenna, AC cord, and power adapter make it ready to install in most living rooms, studios, or gaming setups.

• Front-mounted bass gain control for quick tone shaping
• RCA input for line-level sources and powered sub integration
• Banana and bare-wire outputs for passive subwoofers
• Compact chassis that fits on a shelf or inside AV racks

Who is this for? The Fosi Audio M01-BT suits users who want a compact, efficient amplifier to add serious bass to a small home theater, gaming rig, or DIY audio project without a bulky receiver. It's ideal for owners of passive subwoofers or those who need a single-channel, high-power mono amp for a bass shaker or dedicated low-frequency speaker. If you have only active speakers (self-powered), consider a different solution—the M01-BT is designed to drive passive loads or feed powered subs via RCA.