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

Product ID: 593516480

Details

Item dimensions L x W x H
6.1 x 7.24 x 2
Manufacturer
Fosi Audio
Maximum Supply Voltage
48
Minimum Supply Voltage
24
Voltage
48 volts

⚡235W max power output

🔗Balanced XLR & 1/4" TRS inputs

❄️Advanced heat dissipation system

₨5278

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Description

🎧 Power, Precision, and Personalization — Amplify Your Audio Game!

COOL UNDER PRESSURE - Upgraded ventilation with side vents and dust covers ensures stable high-power performance without overheating.
CUSTOMIZE YOUR SOUND - Swap op-amps to tailor your audio signature—perfect for the discerning ear seeking sonic perfection.
DUAL MODE POWERHOUSE - Switch effortlessly between 180W stereo and 235W mono modes for ultimate audio flexibility.
PRO GRADE CONNECTIVITY - Balanced combo inputs (XLR & TRS) slash noise and interference for crystal-clear sound.
AUDIOPHILE APPROVED COMPONENTS - Premium TPA3255 chip with Japanese & German capacitors delivers pristine clarity and ultra-low distortion.

The Fosi Audio ZA3 is a compact, high-performance stereo amplifier featuring dual-mode operation with up to 235W output, balanced XLR/TRS inputs for noise-free connectivity, and premium audiophile-grade components. Its advanced cooling design ensures reliable, sustained power, while swappable op-amps let you customize your sound profile. Ideal for desktop, home theater, and bookshelf speakers, the ZA3 delivers professional-grade audio clarity and flexibility at an accessible price point.

Specifications

ASIN	B0CLP4T5L7
Best Sellers Rank	#6,007 in Electronics ( See Top 100 in Electronics ) #16 in Audio Component Amplifiers
Brand Name	Fosi Audio
Customer Reviews	4.5 4.5 out of 5 stars (1,313)
Included Components	Fosi Audio ZA3 Power Amplifier x1；48V5A Power Adapter x1；User Manual x1
Item Dimensions	6.1 x 7.24 x 2 inches
Manufacturer	Fosi Audio
Maximum Output Power	235W
Maximum Supply Voltage	48 volts_of_direct_current
Minimum Supply Voltage	24 volts_of_direct_current
Model	ZA3
Mounting Type	Surface Mount
Number of Channels	2
Number of Items	1
Number of Packs	1
Output Power	235 watts
Package Type Name	Cardboard Box
Part Number	ZA3
Specification Met	FCC
Unit Count	1 Count
Voltage	48 volts
Warranty Description	24-month manufacturer

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TrustScore 4.5 | 7,300+ reviews

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₨5278

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered 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 Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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