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 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

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

Product ID: 588475459

Details

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

⚡155W stereo output

🔊235W mono output

🎚️Balanced input support

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48674 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Item dimensions L x W x H
15.5 x 18.4 x
Manufacturer
Fosi Audio
Maximum Supply Voltage
48 Volts

Description

🎶 Elevate Your Sound Game with the Fosi Audio ZA3!

DUAL MODE FLEXIBILITY - Switch seamlessly between stereo and mono modes for tailored audio experiences.
ENHANCED CONNECTIVITY - Balanced input minimizes interference, while 12V trigger-in simplifies device synchronization.
ADVANCED HEAT MANAGEMENT - Innovative cooling design ensures sustained high power output without overheating.
PERSONALIZED SOUND TUNING - Experiment with swappable op-amps to customize your audio output to perfection.
AUDIOPHILE GRADE COMPONENTS - Experience superior sound quality with high-end Class-D amp chip and premium capacitors.

The Fosi Audio ZA3 is a versatile mini amplifier designed for audiophiles, offering both stereo and mono modes with powerful outputs of up to 155W and 235W respectively. It features high-quality components for exceptional audio clarity, advanced heat dissipation for reliable performance, and flexible connectivity options, making it an ideal choice for enhancing your home audio experience.

Specifications

ASIN	B0CLP4T5L7
Best Sellers Rank	#43,182 in Electronics ( See Top 100 in Electronics ) #53 in Hi-Fi Amplifiers
Brand Name	Fosi Audio
Customer Reviews	4.5 out of 5 stars 1,129 Reviews
Importer Contact Information	[email protected].
Item Dimensions	15.5 x 18.4 x 5.1 Centimeters
Item Weight	1.2 Kilograms
Item dimensions L x W x H	15.5 x 18.4 x 5.1 Centimeters
Manufacturer	Fosi Audio
Maximum Supply Voltage	48 Volts
Minimum Supply Voltage	48 Volts
Model Number	ZA3
Mounting Type	Surface Mount
Number of Channels	2
Output Power	545 Watts
Packer Contact Information	[email protected].
Part Number	ZA3
Specification Met	RoHS
Voltage	48 Volts

Reviews

A**R

25.08.2025

R**B

17.04.2026

V**I

21.04.2026

P**R

15.10.2025

P**U

13.02.2026

H**N

10.04.2026

R**N

19.02.2026

V**V

19.07.2025

K**F

21.01.2026

R**S

23.01.2026

M**5

26.08.2024

D**E

19.12.2025

Q**M

19.03.2024

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48674 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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