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.

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.

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.

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.

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.

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Fosi Audio ZA3 Compact TPA3255 Balanced Stereo Amplifier, Home Audio, Mini 2-Channel Monaural Amplifier, Home Theater, Compatible with XLR/TRS/RCA Inputs, Trigger Terminal, For Subwoofer/Passive

Product ID: 725110695

Details

Item dimensions L x W x H
15.5 x 18.4 x
Manufacturer
China
Maximum Supply Voltage
48 Volts
Minimum Supply Voltage
48 Volts
Voltage
48 Volts

🔊180W stereo / 235W mono power

🔌XLR/TRS/RCA balanced inputs

❄️Advanced side-vent heat dissipation

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Description

🎶 Elevate your sound game — compact power, pro clarity, zero compromise!

CUSTOMIZABLE SOUND TUNING - Swap op-amps to personalize your audio signature and optimize subwoofer performance effortlessly.
NEXT LEVEL COOLING DESIGN - Side vents and dust cover ensure stable high output without overheating during marathon listening sessions.
AUDIOPHILE GRADE COMPONENTS - Premium Japanese and German capacitors plus TPA3255 chip deliver crystal-clear, low-distortion audio.
DUAL MODE POWER FLEXIBILITY - Switch seamlessly between 180W stereo and 235W mono for tailored sound impact.
PRO GRADE BALANCED CONNECTIVITY - Minimize noise with XLR/TRS combo inputs and 12V trigger for smart system integration.

The Fosi Audio ZA3 is a compact, high-performance stereo amplifier featuring dual stereo/mono modes with up to 235W output, balanced XLR/TRS/RCA inputs for ultra-low noise, and a cutting-edge heat dissipation system. Built with premium international components and customizable op-amps, it’s designed for audiophiles and home theater enthusiasts seeking powerful, clean sound in a sleek, space-saving chassis.

Specifications

ASIN	B0CLP4T5L7
Amazon Bestseller	#18,496 in Electronics ( See Top 100 in Electronics ) #21 in Audio Component Power Amplifiers
Brand Name	Fosi Audio
Country Of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (1,180)
Included Components	Instructions, Power Adapter
Item Dimensions	15.5 x 18.4 x 5.1 cm
Manufacturer	China
Material Type	Aluminum Alloy
Maximum Supply Voltage	48 Volts
Minimum Supply Voltage	48 Volts
Model	ZA3
Number of Channels	2
Part Number	ZA3
Voltage	48 Volts
Warranty Description	2 years

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COP 1506472

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Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Colombia.

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