Fosi Audio ZA3

Brand: Fosi Audio

₹20,400.00

The Fosi Audio ZA3 is a compact balanced Class D amplifier built around the Texas Instruments TPA3255 chipset. Supporting both stereo and mono operation, it delivers up to 155W × 2 at 4Ω in stereo or 235W × 1 at 4Ω in mono with a 48V/5A power supply, alongside XLR/TRS balanced inputs, RCA, subwoofer output and 12V trigger control.

ZA3

Fosi Audio ZA3

The Fosi Audio ZA3 combines flexible stereo and mono amplification with balanced connectivity for desktop and home Hi-Fi systems. Its TI TPA3255 Class D platform delivers 155W × 2 at 4Ω in stereo or 235W × 1 at 4Ω in mono when powered by a 48V/5A supply. Balanced XLR and 1/4-inch TRS inputs help reduce interference, while RCA input, active subwoofer output and 12V trigger connectivity simplify system integration. Premium NCC, ELNA and WIMA capacitors, Sumida inductors, enhanced thermal management and five swappable op-amps provide additional performance and customisation flexibility for enthusiast audio setups.

ZA3

Details & Specifications

Amplifier Design & Hardware

Brand	Fosi Audio
Model	ZA3
Product Type	Balanced Stereo / Mono Power Amplifier
Amplifier Class	Class D
Chipset	Texas Instruments TPA3255
Operating Modes	Stereo / Mono
Supported Speaker Impedance	2Ω–8Ω

Output Power

48V / 5A Stereo Output	155W × 2 @ 4Ω
48V / 5A Mono Output	235W × 1 @ 4Ω
32V / 5A Stereo Output	95W × 2 @ 4Ω
32V / 5A Mono Output	110W × 1 @ 4Ω
Speaker Impedance Range	2Ω–8Ω

Audio Performance

Frequency Range	20Hz–20kHz (±0.1dB)
SINAD	89dB
THD	<0.006%
Signal-to-Noise Ratio	≥106dB
Dynamic Range	≥106dB
Noise Floor	150µV

Inputs & Outputs

Unbalanced Input	RCA
Balanced Input	XLR / 1/4-Inch TRS Combo
Speaker Output	Banana Plug / Bare Wire Compatible
Active Subwoofer Output	Supported
12V Trigger Input	Supported

Components, Cooling & Customisation

Capacitors	NCC / ELNA / WIMA
Inductors	Sumida
Swappable Op-Amps	5
Compatible Op-Amp Format	DIP8 Dual Op-Amps
Compatible Examples	SS3602 / MUSES02 / OPA2604 / OPA2134PA / OP249 / AD827 / RM4558 / LM4562 / LME49720HA
Cooling Design	Larger Chassis with Side Ventilation and Dust Covers

Dimensions & Power

Dimensions	15.49 × 18.39 × 5.08 cm
Weight	1.78 kg
DC Input Range	24–48V
Power Supply Options	32V / 5A or 48V / 5A
Form Factor	Compact Desktop Power Amplifier

Downloads

About Fosi Audio

Fosi Audio develops audio products focused on making high-quality listening systems accessible, practical and easy to integrate into modern Hi-Fi setups. Its product range combines compact engineering, straightforward functionality and contemporary design for music enthusiasts building both desktop and home audio systems. With products spanning amplification, digital audio and analogue playback, Fosi Audio places emphasis on flexible system building and user-friendly performance. Its range is designed to support listeners seeking compact, versatile and capable components for modern stereo and personal audio systems.

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