Description
⚡ Fosi Audio V3-48V – Compact mono amplifier
TPA3255 – PFFB – RCA / XLR / TRS – 240W @ 4Ω
📌 Product description
The Fosi Audio V3-48V is a compact monoblock amplifier designed to drive a single passive speaker with excellent control and ample power headroom. It is based on the Texas Instruments TPA3255 chip and incorporates PFFB technology to improve frequency response and reduce load-related distortion.
With a 48V power supply, it can deliver up to 240W at 4Ω, while remaining compatible with speakers ranging from 2Ω to 8Ω. It accepts RCA, XLR, and 1/4″ TRS inputs, features a gain selection mode and automatic signal detection, and also allows for the replacement of op-amps to adjust the sound quality. It uses the TPA3255 and incorporates PFFB technology to improve frequency response and reduce load-related distortion.
Key features
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Compact mono amplifier.
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Texas Instruments TPA3255 chip.
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Built-in PFFB technology.
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Power output up to 240W at 4Ω.
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RCA, XLR and 1/4″ TRS inputs.
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Gain selection.
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Auto power / signal sensing.
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Op-amp swapping is possible.
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Chassis-optimized cooling.
🔧 Technical Specifications
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Type: Class-D mono amplifier.
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Chipset: Texas Instruments TPA3255.
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Technologie : PFFB.
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Inputs: RCA, XLR, 1/4″ TRS.
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Output: Mono speaker output.
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Power: up to 240W @ 4Ω.
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Supported impedance: 2Ω to 8Ω.
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SNR: up to 123 dB.
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THD: up to 0.006% or less, depending on the measurement.
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Frequency response: 20 Hz–20 kHz (±0.1 dB).
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Power supply: 48V / 5A.
🎧 Applications
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Amplification of a single passive speaker.
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Multi-channel home theater system.
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Compact and powerful hi-fi system.
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Integration with an AVR as a power amplifier.
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Customizable audio configuration with op-amps.
💪 Benefits
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Big power in a compact design.
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Versatile inputs for multiple sources.
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More stable sound thanks to PFFB technology.
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Compatible with a wide range of speakers.
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Sound customization is available.
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Cooling designed for extended use.
📦 Box contents
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1 × Fosi Audio V3-48V.
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1 × 48V/5A power supply.
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1 × User manual.







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