Fosi Audio ZA3-48V Stereo/Mono Amplifier

Elevate your sound system with the Fosi Audio ZA3-48V, a high-performance stereo/mono amplifier designed for audiophiles seeking clarity, flexibility, and raw power. Powered by the Texas Instruments TPA3255 Class-D amplifier chip, this compact unit delivers exceptional audio fidelity whether used in stereo or mono configurations.

Key Features:

• Stereo & Mono Modes: Switch easily between stereo mode (155W x 2 @ 4Ω) and mono mode (235W x 1 @ 4Ω) depending on your setup needs.
• Balanced & Unbalanced Inputs: Accepts RCA (unbalanced) and XLR/¼” TRS (balanced) inputs for clean signal transmission and broad compatibility.
• Subwoofer Output with Low-Pass Filter: Dedicated 200Hz low-pass filter for seamless active subwoofer integration.
• Op-Amp Rolling Capability: Customize your sound signature by swapping the five DIP8 dual op-amps.
• Enhanced Cooling Design: Larger chassis and vented side panels with dust protection ensure stable performance during long sessions.

Specifications:

• Amplifier Chip: Texas Instruments TPA3255
• Output Power with 48V/5A Supply:
  • Stereo Mode: 155W x 2 @ 4Ω
  • Mono Mode: 235W x 1 @ 4Ω
• Supported Impedance: 2Ω – 8Ω
• Inputs: RCA, XLR, ¼” TRS
• Outputs: Speaker terminals (banana plugs or bare wire), Active Subwoofer Out
• Frequency Response: 20Hz – 20kHz (±0.1dB)
• SNR: ≥106dB
• THD: <0.006%
• Dynamic Range: ≥106dB

Dimensions & Weight:

• Size: 6.1 x 7.2 x 2 inches
• Weight: Approximately 3.9 lb

Included in the Box:

• Fosi Audio ZA3 Amplifier
• 48V/5A Power Supply
• User Manual