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Sponsored Ad – Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply

Sponsored Ad – Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply

Q: Is it possible to use the trigger out from the Fosi Audio ZD3 to two pieces of ZA3 amplifiers?

Yes, use a dual 3.5mm male splitter cable to trigger the ZA3 to switch on synchronously.

Q: How to set up a system using two ZA3 units in mono mode?

- Connect the RCA (XLR) cables to the right-channel RCA (XLR) input ports of the two ZA3 units, and link the speaker wires to the right-channel binding posts.

Q: ZA3 recommendations for replacing op-amps in mono mode?

If you're using RCA mode, please replace only the right op-amp. For XLR mode, swap the right and XLR channel op-amps.

Q: No front light on ZA3 though there is light on the ac adapter.

Long press the volume button for 2 seconds to power it on.

Q: The power on LED light on my ZA3 is dead.

Check if the LED is misaligned with the front panel hole, especially if the op-amp was recently changed. Misalignment could cause the LED not to be visible through the case.

Product ID: 593516485

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Details

Item dimensions L x W x H
15.5 x 18.4 x
Voltage
48 Volts
Manufacturer
Fosi Audio
Maximum supply voltage
48 Volts (DC)
Minimum supply voltage
24 Volts (DC)

🔊155W stereo / 235W mono power

🔗Balanced XLR & 1/4" TRS input

❄️Upgraded advanced heat dissipation

Frequently Bought Together

Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio Component Mini 2 Channel Mono Amp TPA3255 for Subwoofer Desktop Home Theater Bookshelf Tower Floorstanding Passive Speakers with 48V Power Supply

VANDESAIL XLR Cables, 3ft 2 Pack Microphone Cable, XLR Male to Female Balanced Microphone Cord 3 pin, 3 Foot Short mic Cord Oxygen-Free Copper (OFC) Nylon Braided

Description

🎧 Elevate your sound game — power, precision, and personalization in one sleek amp!

CUSTOMIZABLE SOUND TUNING - Roll your own sonic signature with five swappable op-amps—fine-tune your audio like a true audiophile.
NEXT LEVEL COOLING SYSTEM - Stay cool under pressure with a larger chassis, side vents, and dust covers for stable high-power performance.
DUAL MODE POWER FLEXIBILITY - Switch effortlessly between 155W stereo and 235W mono modes to match your audio setup and maximize impact.
AUDIOPHILE APPROVED COMPONENTS - Experience crystal-clear sound with TPA3255 chip and premium Japanese & German capacitors and inductors.
PRO GRADE BALANCED CONNECTIVITY - Minimize noise with XLR and 1/4" TRS balanced inputs plus 12V trigger for seamless device sync.

The Fosi Audio ZA3 is a compact yet powerful stereo amplifier featuring dual-mode output (155W stereo, 235W mono), balanced XLR/TRS inputs for noise-free audio, and advanced heat dissipation for stable performance. Built with premium audiophile-grade components and customizable op-amps, it delivers exceptional clarity and flexibility for home theater, bookshelf, or floorstanding passive speaker setups.

Specifications

Number of Channels	2
Package Type	Cardboard Box
Output Power	235 Watts
Mounting Type	Surface Mount
Voltage	230 Volts
Specification Met	FCC
Item Dimensions	6.1 x 7.24 x 2 inches

Have a Question? See What Others Asked

Is it possible to use the trigger out from the Fosi Audio ZD3 to two pieces of ZA3 amplifiers?

How to set up a system using two ZA3 units in mono mode?

ZA3 recommendations for replacing op-amps in mono mode?

No front light on ZA3 though there is light on the ac adapter.

The power on LED light on my ZA3 is dead.

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