Fosi Audio M03: Affordable, Compact, and Powerful Mono Amplifier

The Fosi Audio M03 Mono Amplifier is an affordable, compact, and powerful compact unit. It is equipped with a TI TPA3255D2 amplifier chip that delivers 120W of power into 4 ohms. It has two operating modes that can be selected using a switch on the front panel. The “PBTL” mode allows you to power a passive mono speaker and an active subwoofer, and the “SUB” mode allows you to power a passive or active subwoofer.

The front panel also has a potentiometer for volume control and a second potentiometer for the subwoofer's 20-300 Hz low-pass filter. This low pass filter only works in “SUB” mode with a passive subwoofer. Simple and effective, this subwoofer amplifier will allow you to drive a large number of subwoofers available on the market. The delivery set includes a 32V DC 5A power supply.

Fosi Audio decided to integrate the TI TPA3255D2 amplifier chip into its M03 amplifier. This Texas Instrument IC is a Class D power amplifier IC featuring PurePath™ UltraHD technology for low distortion across the entire audio range and superior sound quality.

Fosi Audio M03 specifications:

• Product Type: Mono Amplifier + Subwoofer
• Amplification chip: TI TPA3255D2
• Input: 1x RCA input
• Output: 1x subwoofer output/1x speaker terminal
• Output power: 120W
• End impedance: 4-8Ω
• Input sensitivity: ≤ 0.2mV
• Frequency response: 20Hz-20KHz (±3dB)
• Bass Range: 20-200Hz
• Cutoff frequency: 20 – 300 Hz
• THD: ≤ 0.03%
• SNR: ≥ 106 dB
• Bass cutoff frequency adjustment: 20-300 Hz
• Power range: 24-36V DC (32V 5A power supply included)
• Net weight: 1kg
• Dimensions: 130 x 115 x 35 mm
• Black color

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