Fosi Audio ZA3 Balanced 2.1-Channel Power Amplifier with 48V 5A Power Supply

BH #FOZA3 • MFR #ZA3-48V5A
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Fosi Audio ZA3 Balanced 2.1-Channel Power Amplifier with 48V 5A Power Supply
Key Features
  • 2.1-Channel Configuration
  • Class-D Amp with T.I. TPA3255 Chipset
  • 155W per Channel RMS at 4 Ohms in Stereo
  • 235W RMS at 4 Ohms Output in Mono
Enjoy pure and simple sound with the Fosi Audio ZA3 Balanced 2.1-Channel Power Amplifier with 48V 5A Power Supply. The compact ZA3 features switchable stereo/mono output modes with a 4-ohm output at 155W per channel RMS in stereo and 235W RMS in mono. Connect to a wide variety of devices with balanced XLR-TRS 1/4" combo jacks or the stereo RCA input. Connect passive speakers with binding-post outputs, and an active subwoofer via RCA output.
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Fosi Audio ZA3 Overview

Enjoy pure and simple sound with the Fosi Audio ZA3 Balanced 2.1-Channel Power Amplifier with 48V 5A Power Supply. The compact ZA3 features switchable stereo/mono output modes with a 4-ohm output at 155W per channel RMS in stereo and 235W RMS in mono. Connect to a wide variety of devices with balanced XLR-TRS 1/4" combo jacks or the stereo RCA input. Connect passive speakers with binding-post outputs, and an active subwoofer via RCA output.

Premium Components
The ZA3 features a TPA3255 high-end class-D amp chip and utilizes premium Japanese NCC, Elna, and German WIMA capacitors, as well as Japanese Sumida inductors for exceptional audio quality. With a SINAD (Signal-to-Noise and Distortion) rating of up to 89 dB, an SNR (Signal-to-Noise Ratio) of up to 106 dB, and a low noise floor of only 150 μV, it delivers exceptional clarity and low distortion.
Advanced Heat Dissipation
Based on Fosi Audio V3's groundbreaking heat dissipation design, it upgrades ZA3's cooling system by featuring a larger chassis, moving vents to the sides, and adding dust covers to achieve better ventilation for a sustained and stable high-power output.
Enhanced Scalable Fun
Personalize your audio experience with the op-amp rolling feature. The ZA3 stocks five swappable op-amps for left and right channel outputs, balanced input, and subwoofer output. Experiment with compatible DIP8 dual op-amps (sold separately) such as Sparkos SS3602, MUSES02, OPA2134PA, OP249, AD827, RM4558, LM4562, LME49720HA, etc. to fine-tune your sound to perfection.
Additional Details
  • Balanced combo inputs support XLR and 1/4" TRS plugs
  • 12V trigger input
  • Aluminum alloy and one-piece molded chassis

Fosi Audio ZA3 Specs

Key Specs
Channels
2.1
Power Output per Channel
2-Channel Driven:
155 W at 4 Ohms (RMS)
1-Channel Driven:
235 W at 4 Ohms (RMS)
Rear A/V Outputs
1x RCA Subwoofer Line-Out
Speaker I/O
2x Binding Post Pairs
Wi-Fi
No
Bluetooth
No
Amplifier
Amplifier Type
Power Amplifier
Channels
2.1
Amplifier Class
Class-D
Power Output per Channel
2-Channel Driven:
155 W at 4 Ohms (RMS)

1-Channel Driven:
235 W at 4 Ohms (RMS)
Frequency Response
20 Hz to 20 kHz
THD
< 0.006%
Speaker Impedance
2 to 8 Ohms
Tone Control
No
Audio Processing
Auro 3D Support
No
Supported Sample Rates
No
Connectivity
Rear A/V Inputs
1x Stereo XLR Balanced Line
1x Stereo RCA Line
Rear A/V Outputs
1x RCA Subwoofer Line-Out
Front I/O
No
Other Rear I/O
1x 1/8" / 3.5 mm (12 V Trigger) Input
Speaker I/O
2x Binding Post Pairs
Media Card Slot
No
A/B Speaker Selection
No
Bi-Amp Capability
No
Input Sensitivity
0.77 V
Dynamic Range
Line: 106 dB
Signal to Noise Ratio
≥ 106 dB
Total Harmonic Distortion (THD)
< 0.006%
Wireless Connectivity
Wi-Fi
No
Bluetooth
No
Control
External Control Support
No
Mobile App Compatible
No
Power
Input Power
24 to 48 VDC at 5 A
Physical
Dimensions (W x H x D)
6.1 x 7.2 x 2.0" / 15.5 x 18.4 x 5.1 cm
Weight
3.92 lb / 1.78 kg
Packaging Info
Package Weight
3.785 lb
Box Dimensions (LxWxH)
14.6 x 9 x 3.1"

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