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 : �鶹��.ca: Electronics

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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

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Item dimensions L x W x H	15.5 x 18.4 x 5.1 Centimetres
Voltage	48 Volts
Manufacturer	Fosi Audio
Maximum supply voltage	48 Volts (DC)
Minimum supply voltage	230 Volts
Mounting type	Surface Mount
Brand	Fosi Audio
Number of channels	2
Output power	235 Watts
Specification met	FCC

About this item

Dual-Mode Innovation: This new generation mini amplifier offers both stereo and mono modes, adapts flexibly to your diverse needs, allowing seamless mode switching. In stereo mode, it delivers a robust output of up to 180W, while in mono mode, the power soars to a maximum of 235W. Pair two ZA3 units in mono configuration to create a powerful audio system, significantly enhancing your listening experience
Richer Connectivity: Debut amplifier with balanced input and trigger in, the ZA3 features a balanced combo audio signal input connector supporting both XLR and 1/4" TRS plugs. This design minimizes interference and reduces noise floor. The 12V trigger-in connector enables synchronization with other devices, streamlining the process of turning on/off without individual operations
Audiophile-Grade Components: The ZA3 features the TPA3255 high-end Class-D amp chip and utilizes premium Japanese NCC, ELNA, and German WIMA capacitors, and Japanese Sumida inductors for exceptional audio quality. With a SINAD rating of up to 89dB, an SNR of up to 106dB, and a low noise floor of only 150μV, it delivers exceptional clarity and low distortion
Advanced Heat Dissipation: Based on V3's groundbreaking heat dissipation design, we upgraded ZA3's cooling system by featuring a larger chassis, moving vents to the sides, and adding dust covers to achieve better ventilation for a sustained and stable high power output
Enhanced Scalable Fun: Personalize your audio experience with the op-amp rolling feature! The ZA3 stocks five swappable op-amps for left and right channel outputs, balanced input, and subwoofer output. Experiment with compatible DIP8 dual op-amps such as Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4558, LM4562, LME49720HA, etc. to fine-tune your sound to perfection

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This item: 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

$199.99

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FosPower Banana Plugs 6 Pairs / 12 pcs, Closed Screw 24K Gold Plated Banana Speaker Plug Connectors for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems

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WiiM Ultra Music Streamer & Digital Preamp | 3.5" Touchscreen, Compatible with Google Cast & Alexa, Stream Spotify, �鶹�� Music, Tidal & More | HDMI ARC, Phono Input & Headphone Output | Space Gray

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Technical Details

Brand	‎Fosi Audio
Manufacturer	‎Fosi Audio
Model	‎ZA3
Part Number	‎ZA3
Voltage	‎48 Volts
Wattage	‎235 watts
Batteries included	‎No
Batteries Required	‎No
Connector Type	‎auxiliary, xlr
Mounting type	‎Surface Mount
Does it contain liquid?	‎No
Includes rechargable battery	‎No
Manufacturer	‎Fosi Audio
Language	‎English
Item model number	‎ZA3
Product Dimensions	‎15.49 x 18.39 x 5.08 cm; 1.75 kg
ASIN	‎B0CLP4T5L7

Additional Information

Date First Available	Oct. 24 2023
Customer Reviews	678 ratings 4.6 out of 5 stars
�鶹�� Rank	#7,439 in Electronics (See Top 100 in Electronics) #24 in Audio Component Amplifiers

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	This Item 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	Recommendations Fosi Audio TB10D 2 Channel Stereo Amplifier, Class D Mini Power Integrated Amplifiers 600W for Passive Speakers/Bass Shaker, Home Audio Component Desktop Amp Receiver TPA3255 with Bass Treble Control	�� Fosi Audio V3 Mono Power Amplifier for Home Audio Speakers, Mini Monoblock Class D Amp with TPA3255, 240W for HiFi Home Theater AVR Receiver Component, RCA/XLR Balanced Inputs with 48V/5A Power Supply	�� Fosi Audio TDA7498E 2 Channel 160W x2 Stereo Audio Amplifier Mini Hi-Fi Class D Car Integrated Amp for Passive Speakers with 24V Power Supply	�� Douk Audio A5 2 Channel TPA3255 Stereo Amp, 300 Watts x2 Mini Hi-Fi Audio Power Amplifier Class D for Home Theater System, Passive Bookshelf Tower Speakers with High-Pass Filter + 32V Power Supply	�� AIYIMA A70 Balanced Stereo Amplifier with PFFB,TPA3255 2 Channel Class D Amp for Desktop Home Theater Bookshelf Speaker,with XLR & RCA Inputs & Trigger Input,with DC48V 5A Power Adapter
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Price	$199.99	$109.99	-5%��$180.49 Was: $189.99	$89.99	-22%��$116.99 Was: $149.99	$283.99
Delivery	Get it by Wednesday, Aug 6	Get it by Wednesday, Aug 6	Get it by Wednesday, Aug 6	Get it by Thursday, Aug 7	Get it by Wednesday, Aug 6	Get it by Wednesday, Aug 6
Customer ratings	4.6678	4.41,235	4.4182	4.31,288	4.647	4.5105
Sold by	Fosi Audio	Fosi Audio	Fosi Audio	Fosi Audio	Douk Audio Direct	Yima Top
number of channels	2	2	1	2	2	2
voltage	48 volts	230 volts	48 volts	24 volts of direct current	32 volts of direct current	48 volts
output power	235 watts	600 watts	240 watts	160 watts	600 watts	140 watts
specification met	FCC	CE	—	—	CE	FCC
mounting type	Surface Mount	Tabletop Mount	Freestanding	Surface Mount	Freestanding	Through-mount or surface mount
	—	—	5 amps	4.5 amps	—	5 amps

From the brand

Amplifying Your Voice, Shaping Our Innovation

Guided by our mission of "Redefining HiFi with Unmatched Value", Fosi Audio continues to fuel its passion for the Hifi industry, ramp up R&D efforts, and co-create new HiFi equipment with users. We pledge to bring more amazing Hifi gear with high value for the price, innovative design, cutting-edge technology, and premium quality, to audiophiles worldwide.
2.0 Channels Home Audio Amp
Subwoofer Amplifier & Mono Amp
Fosi Audio V3

TPA3255 Class D Home Audio Mini Speaker 2 Channel Amp 300 Watts x2

Product Description

Stereo Amplifier Home Audio

Merchant video

Amplifying Your Voice, Shaping Our Innovation

At Fosi Audio, behind every innovation, there's a story. The birth of the ZA3 amplifier is just such a story, centered around our users. After the launch of the V3 amplifier, we gathered innumerable feedback from passionate audiophiles. They expressed a desire for us to develop an even better amplifier based on V3.

Input: RCA, XLR, ¼”TRS; Output: Stereo, Mono

SNR≥106��; THD<0.006%; SINAD: 89dB

Frequency Response: 20Hz-20kHz (±0.1dB)

Rated Power Output: Stereo 155W*2 @4Ω; Mono 235W @4Ω

Flawless XLR Balanced Input Support

Delivers pure sound, initiating a high-definition auditory adventure with unmatched clarity.
PBTL Mono Mode Support

More power output to elevate your stereo HiFi system to new heights.

TI TPA3255 Amp Chip Integrated

Enabling superior sound and ultra-low distortion across the audio band with Class-D efficiency.

Advanced Heat Dissipation Design

Enhanced cooling with larger chassis, whole-body heatsink, and side ventilation with dust covers.
Swappable Op-Amps

Compatible with DIP8 dual op-amps. Roll them to get your preferred sound signature.
Logarithmic Potentiometer

Helps to achieve a fine volume tuning to match human ear's auditory characteristics.
Separated Digital & Analog Modules

Optimized circuit board layout protects core audio modules from interference for a purer sound.

12V Trigger Sync Interface

Smooth synchronization with other devices for easy one-click power management, unifying your audio system's operation.

Aluminum Alloy and One-Piece Molded Chassis

Delicate sandblasting and smooth beveled edges, exuding a premium, exquisite texture and high-end appeal.

ZA3

Comparison Chart

2.0 CH Amp	Type	2.0 CH Amp
155W x 2 / 235W x 1	MAX Power Output	300W x 2
RCA+XLR	Input	RCA
Passive SPK +Sub-out	Output	Passive SPK +Pre-out
	Treble& Bass Control
<0.006%	THD	<0.003%
≥106��	SNR	≥110��

2.0 CH Amp	Type	2.0 CH Amp
155W x 2 / 235W x 1	MAX Power Output	300W x 2
RCA+XLR	Input	RCA
Passive SPK +Sub-out	Output	Passive Speakers
	Treble& Bass Control
<0.006%	THD	≤ 0.3%
≥106��	SNR	≥ 90dB

2.0 CH Amp	Type	Bluetooth 2.0 CH Amp
155W x 2 / 235W x 1	MAX Power Output	300W x 2
RCA+XLR	Input	Bluetooth + RCA
Passive SPK +Sub-out	Output	Passive/Active SPK
	Treble& Bass Control
<0.006%	THD	≤ 0.005%
≥106��	SNR	≥108��

2.0 CH Amp	Type	Headphone Amp+Preamp
155W x 2 / 235W x 1	MAX Power Output	-
RCA+XLR	Input	Bluetooth + RCA
Passive SPK +Sub-out	Output	RCA+3.5mm+AUX
	Treble& Bass Control
<0.006%	THD	≤ 0.02%
≥106��	SNR	≥103��

V3

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P3

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Customer reviews

678 global ratings

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Customers say

Customers like the sound quality, performance, and size of the electronic component amplifier. They mention it's excellent for amplificating rear speakers and has plenty of power running their high-efficiency speakers. Some also say it's perfect for adding more power to a home theatre setup without breaking the bank.

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Sound quality Performance Power Size

19 customers mention "Sound quality"19 positive0 negative

Customers are satisfied with the sound quality of the product. They mention it's excellent for amplificating rear speakers.

"...These sound great and have plenty of power running my high efficiency speakers. Great performance and great price!" Read more

"...computer via Audioquest Dragonfly Colbalt and B&W LM1 speakers it sounds awesome. Better than expected...." Read more

"It sounds great as a budget amplifier, I've been using it for over 6 months now and it still works great...." Read more

"Very loud with clean sound.impressed" Read more

13 customers mention "Performance"13 positive0 negative

Customers are satisfied with the performance of the product. They mention it's a great unit, strong performer, and does justice to the hard work Fagen and Becker put in to the recordings. Some say it works fine and is probably best for a small setup.

"The Item was nice, but I was unable to hook it up...." Read more

"...Great performance and great price!" Read more

"...amplifier, I've been using it for over 6 months now and it still works great. I wish it had a remote to be able to turn it off and adjust volume...." Read more

"...too hard runs my Paradigm passives at low to moderate volume, so far no issues...." Read more

4 customers mention "Power"4 positive0 negative

Customers like the power of the product. They mention it's perfect for adding more power to a home theatre setup without breaking the bank.

"Excellent amp. Hooked up to my computer via Audioquest Dragonfly Colbalt and B&W LM1 speakers it sounds awesome. Better than expected...." Read more

"Perfect for adding more power to a home theatre setup without breaking the bank" Read more

"...Power is sufficient." Read more

3 customers mention "Size"3 positive0 negative

Customers like the size of the product. They mention it's small, inexpensive, and best for a small setup like an office with a surround sound receiver and bulky subwoofer.

"Replaces a 90s surround sound receiver and bulky ailing subwoofer. Only required to power some tv mini speakers. Quite the cleaner look...." Read more

"...As a class D amp is works fine and is probably best for a small setup such as an office with bookshelf speakers and it will give you a lot of bang..." Read more

"Small, inexpensive and great sounding unit...." Read more

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Top reviews from Canada

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JBEEGOOD
Son de qualité
Reviewed in Canada on May 15, 2025
Verified Purchase

parfait fonctionne a merveille,excellent pour amplifier mes haut parleurs surround arriere,pour mon onkyo rz50,grace au déclencheur 12v brancher, s'allume et s'éteint automatiquement.Que demander de plus sinon que la qualité soit au rendez-vous

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john van vliet
Improving the sound from my PC to my speakers.
Reviewed in Canada on April 30, 2025
Verified Purchase
The Item was nice, but I was unable to hook it up. I had hoped to get a better sound than with the Fosi Pro, but I wasn't able to produce a good audio result.

Read more

Helpful

IvanW
Great performers
Reviewed in Canada on October 15, 2024
Verified Purchase
Needed something compact to run my bookshelf speakers in a limited space area.

Bought a second ZA3 to match up with my other ZA3, both set in MONO modes.

These sound great and have plenty of power running my high efficiency speakers.

Great performance and great price!

Read more

IvanW

Great performers

Reviewed in Canada on October 15, 2024
Needed something compact to run my bookshelf speakers in a limited space area.

Bought a second ZA3 to match up with my other ZA3, both set in MONO modes.

These sound great and have plenty of power running my high efficiency speakers.

Great performance and great price!

Images in this review

2 people found this helpful

Helpful

Larry G Murrin
Excellent amp
Reviewed in Canada on February 14, 2025
Verified Purchase
Excellent amp. Hooked up to my computer via Audioquest Dragonfly Colbalt and B&W LM1 speakers it sounds awesome. Better than expected. Just realize that there is no remote, inputs are limited. If you can live with that, recommended.

Read more

Helpful

Marianne pelletier
Excellent soundbar alternative
Reviewed in Canada on March 10, 2025
Verified Purchase
It sounds great as a budget amplifier, I've been using it for over 6 months now and it still works great. I wish it had a remote to be able to turn it off and adjust volume. It's nothing exceptional tho, doesn't match higher end amplifiers of course but it's hard to beat at around it's price and a very good alternative for a soundbar.

Read more

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�鶹�� Customer
Strong performer
Reviewed in Canada on April 1, 2025
Verified Purchase
Very loud with clean sound.impressed

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Helpful

Smurf
Ease of setup
Reviewed in Canada on February 25, 2025
Verified Purchase
Replaces a 90s surround sound receiver and bulky ailing subwoofer. Only required to power some tv mini speakers. Quite the cleaner look.
The YT reviews helped a lot in my decision.

Read more

Helpful

RonaldSDean
Reviewers said it was good.. even better in person. *updated review*
Reviewed in Canada on December 9, 2024
Verified Purchase
Using this in my basement for retro gaming. Pushing paradigm monitor speakers and a paradigm sub.

Clean sound. Great channel separation. I wish there was some form of EQ. (That gets handled by the audio source).

Way better than I expected.

*review update*

I swapped out the op amps. Put in Burson v7 vivids. Unreal. Really made this little amazing amp shine even more.

Also bought a second. Running them in mono mode. AMAZING.

Read more

RonaldSDean

Reviewers said it was good.. even better in person. *updated review*

Reviewed in Canada on December 9, 2024
Using this in my basement for retro gaming. Pushing paradigm monitor speakers and a paradigm sub.

Clean sound. Great channel separation. I wish there was some form of EQ. (That gets handled by the audio source).

Way better than I expected.

*review update*

I swapped out the op amps. Put in Burson v7 vivids. Unreal. Really made this little amazing amp shine even more.

Also bought a second. Running them in mono mode. AMAZING.

Images in this review

4 people found this helpful

Helpful

Top reviews from other countries

Charles Pooter
Audiophile Quality
Reviewed in the United Kingdom on July 9, 2025
Verified Purchase

Seriously good. This little powerhouse isn't just clean sounding, accurate and a true audiophile performer, it is also exceptionally good value if you don't care about brand image and loads of knobs. It is demonstrably better than any other amp I have used that have including 'high end' kit from Quad, Musical Fidelity, Marantz, Cambridge Audio and Sugden to name a few. I'm using 6 ohm speakers and this beauty just sounds exquisitely poised. Depending on the source the mid range is so rich and imaging holographic. I'm now thinking I need to change my (expensive) desktop amp which sounds decidedly 'meh' by comparison, and get another ZA3. The psu and the amp itself gets barely warm in use I am very hopeful that thanks to clever design and high quality components that it will last a very long time. Congratulations to the Fosi team.

Read more
Björn Fogelberg
Fantastiskt
Reviewed in Sweden on July 13, 2025
Verified Purchase
Fantastiskt litet slutsteg som väckte liv i mina högtalare

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Antonio M.
Muy buen valor precio
Reviewed in Mexico on May 11, 2025
Verified Purchase
Calidad, y valor precio sin igual. Usando como DAC el Chord 2 suena muy bien.

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H. A.
Fun little amplifier with great versatility for expansion into hifi
Reviewed in Saudi Arabia on April 15, 2024
Verified Purchase
I used this amplifier to drive the JBL 530 which is a 6 ohm nominal load and 86 db/w sensitivity speakers and it drives them at all levels easily with no noise whatsoever, the character of this speaker/amp pairing is a bit laid back in mid range, fast and tight thumping bass, slightly rolled off in the treble,

I’ve found the best dynamics with the potentiometer somewhere between 11:00-01:00 o’clock and the windows volume betwen 60-70%(Vrms of 1.95V DAC line-level output), this gives me about 70 db average listening level with 30+ db of dynamics headroom.

I’m looking to try other op-amps in this amplifier and see how it affects it tonally, overall I’m plenty happy for such a good price and lower size profile that this amplifier provides, well done Fosi!

Read more
Muzo35
Efsane!! Fosi Za3 Stereo!!
Reviewed in Turkey on August 26, 2024
Verified Purchase
48v 5A adaptörü takıp kendi dahili dac.ı rca ile denedim evet ilgi çekiciydi fakat standart bi d -classtı. Daha sonra 3 adet muses02 opamp sipariş verdim ve elime ulaşıncaya kadar amfinin yanmasını bekledim. Nihayet geldi opampları değiştirdim ve sub opampı devre dışı bıraktım(kullanmadığım için) vee Xlr (cardas golden cross) ları bağlayınca vaaay müthiş ses!!
Birçok pahalı amfiyi sınıfta bırakır çok net!! Opamp yükseltmesi yapıp güzel bir Xlr ile kullanınız şaşırcaksınız....

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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

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About this item

Frequently bought together

Product information

Technical Details

Additional Information

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Bestselling | Highest rated | Lowest price

Compare with similar items

From the brand

2.0 Channels Home Audio Amp

Subwoofer Amplifier & Mono Amp

Fosi Audio V3

Product Description

Stereo Amplifier Home Audio

Amplifying Your Voice, Shaping Our Innovation

Flawless XLR Balanced Input Support

PBTL Mono Mode Support

TI TPA3255 Amp Chip Integrated

Advanced Heat Dissipation Design

Swappable Op-Amps

Logarithmic Potentiometer

Separated Digital & Analog Modules

12V Trigger Sync Interface

Aluminum Alloy and One-Piece Molded Chassis

Comparison Chart

2.0 CH Amp

Type

2.0 CH Amp

155W x 2 / 235W x 1

MAX Power Output

300W x 2

RCA+XLR

Input

RCA

Passive SPK +Sub-out

Output

Passive SPK +Pre-out

Treble& Bass Control

<0.006%

THD

<0.003%

≥106���

SNR

≥110���

2.0 CH Amp

Type

2.0 CH Amp

155W x 2 / 235W x 1

MAX Power Output

300W x 2

RCA+XLR

Input

RCA

Passive SPK +Sub-out

Output

Passive Speakers

Treble& Bass Control

<0.006%

THD

≤ 0.3%

≥106���

SNR

≥ 90dB

2.0 CH Amp

Type

Bluetooth 2.0 CH Amp

155W x 2 / 235W x 1

MAX Power Output

300W x 2

RCA+XLR

Input

Bluetooth + RCA

Passive SPK +Sub-out

≥106��

≥110��

≥106��

≥106��

≥108��

≥106��

≥103��

Reviewers said it was good.. even better in person. updated review

Reviewers said it was good.. even better in person. updated review

Audiophile Quality

Fantastiskt

Muy buen valor precio

Fun little amplifier with great versatility for expansion into hifi

Efsane!! Fosi Za3 Stereo!!