--- product_id: 588475459 title: "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" brand: "fosi audio" price: "€ 322.18" currency: EUR in_stock: true reviews_count: 8 category: "Fosi Audio" url: https://www.desertcart.be/products/588475459-za3-balanced-stereo-amplifier-home-audio-component-mini-2-channel store_origin: BE region: Belgium --- # 155W stereo output 235W mono output Balanced input support 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 **Brand:** fosi audio **Price:** € 322.18 **Availability:** βœ… In Stock ## Summary > 🎢 Elevate Your Sound Game with the Fosi Audio ZA3! ## Quick Answers - **What is this?** 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 by fosi audio - **How much does it cost?** € 322.18 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/588475459-za3-balanced-stereo-amplifier-home-audio-component-mini-2-channel) ## Best For - fosi audio enthusiasts ## Why This Product - Trusted fosi audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Dual-Mode Flexibility:** Switch seamlessly between stereo and mono modes for tailored audio experiences. - β€’ **Enhanced Connectivity:** Balanced input minimizes interference, while 12V trigger-in simplifies device synchronization. - β€’ **Advanced Heat Management:** Innovative cooling design ensures sustained high power output without overheating. - β€’ **Personalized Sound Tuning:** Experiment with swappable op-amps to customize your audio output to perfection. - β€’ **Audiophile-Grade Components:** Experience superior sound quality with high-end Class-D amp chip and premium capacitors. ## Overview 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. ## Description Product Description Fosi Audio ZA3 The next generation balanced dual-mode Class-D power amplifier. Fosi Audio's first amplifier supporting both stereo and mono modes. 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 SNRβ‰₯106dB; THD<0.006%; SINAD: 89dB Frequency Response: 20Hz-20kHz (Β±0.1dB) Rated Power Output: Stereo 155W*2 @4Ξ©; Mono 235W @4Ξ© 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. 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. Frequently Asked Questions 1. Why is there no sound after all the devices areconnected?The amplifier is not powered on, please check whetherthe mode indicator is on:The volume of the amplifier is too small, please turnthe volume knob clockwise and adjust it to the rightlevel;The audio cable is connected ineorreot'Yp eaee ctionreconnectit according to the steps inmanual:The audio source is not playing or muted, please checkthe audio source equipment. 2. After a successful connection, the sound is abnormal?Polarity reversed. Please check if the speaker wires arecorrectly connected with the red as positive and blackas negative;Boer epeake. wFce REAVRCRReconnect or replace thecables,reestaplish theconnections or try using different RCA/XLR cables.Amplifier overload. Reduce the volume if the amplifierIs experiencing overload. 3. Unable to play properly after connecting the turntable?The turntable lacks a built-in preamp: Pleasecheck ifyour turntable has a built-in preamp. The ZA3does nothave a built-in turntable preamp, so you needto connectan external turntable preamp between your turntable and the ZA3, For example,Fosi Audio Boxx1,X2, X4,Incorrect turntable output mode: Turntables with builtIn preamps typically offerboth turntable output andline output options. Please select the line output. Review: changed my opinion about class D amps! - where to begin! My previous setup was Marantz PM6007 with WiiM Ultra & Elipson Planet L Speakers. I was ok with the setup but I knew, was missing something on the higher frequencies & details. just heard about this product on youtube channel "VirtualHiFi" - found many good videos with sound test comparing with 10k - 15k USD costing amps. I took the decision & bought this today with 48V power supply & right now its been playing for 3 hours replacing the marantz PM6007 only with rest of the same setup. I have no words to say - Man! it's blown away the marantz right out of the box and my elipson planet L speakers have come to life. it's a night & day difference. I kept the volume at 75% position & controlling the volume from wiim ultra and it's running cooler now than at 100% position. i am seriously thinking about the reason why it is sounding great than the marantz. Hmm.. may be one reason - the frequency range with 0.1+-DB? I don't know but it's sounding fuller, detailed, airy high-frequencies & analogue kind of texture. ZA3 changed my mind to join in the class D era as I have ordered another now to try as Monoblocks. I am totally happy & the value for money is top of the roof! I really appreciate the FOSI TEAM behind this to design such a great product! Best of luck for your next musical invention!!! Got the second one & set them as monoblocks - sound stage is wider now & details are more cleaner especially the vocals & mid range. I started enjoying my setup now with peace of mind! Review: Best option for medium size room - Excellent Sound Quality and compact size with good thermal management. Blindly can go for it. Im using it in 5.2 home theater system. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CLP4T5L7 | | Best Sellers Rank | #27,404 in Electronics ( See Top 100 in Electronics ) #24 in Hi-Fi Amplifiers | | Brand Name | Fosi Audio | | Customer Reviews | 4.5 out of 5 stars 1,095 Reviews | | Importer Contact Information | support@fosiaudio.com. | | 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 | support@fosiaudio.com. | | Specification Met | RoHS | | Voltage | 48 Volts | ## Product Details - **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 - **Voltage:** 48 Volts ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/51XgZUlMEQL.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/71jrN7xxR1L.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/713BlqtwMhL.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/714J9YgFoiL.jpg) ![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 - Image 5](https://m.media-amazon.com/images/I/71SJfec1-vL.jpg) ## Questions & Answers **Q: Is it possible to use the trigger out from the Fosi Audio ZD3 to two pieces of ZA3 amplifiers?** A: 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?** A: - 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?** A: 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.** A: Long press the volume button for 2 seconds to power it on. **Q: The power on LED light on my ZA3 is dead.** A: 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ changed my opinion about class D amps! *by A***R on 25 August 2025* where to begin! My previous setup was Marantz PM6007 with WiiM Ultra & Elipson Planet L Speakers. I was ok with the setup but I knew, was missing something on the higher frequencies & details. just heard about this product on youtube channel "VirtualHiFi" - found many good videos with sound test comparing with 10k - 15k USD costing amps. I took the decision & bought this today with 48V power supply & right now its been playing for 3 hours replacing the marantz PM6007 only with rest of the same setup. I have no words to say - Man! it's blown away the marantz right out of the box and my elipson planet L speakers have come to life. it's a night & day difference. I kept the volume at 75% position & controlling the volume from wiim ultra and it's running cooler now than at 100% position. i am seriously thinking about the reason why it is sounding great than the marantz. Hmm.. may be one reason - the frequency range with 0.1+-DB? I don't know but it's sounding fuller, detailed, airy high-frequencies & analogue kind of texture. ZA3 changed my mind to join in the class D era as I have ordered another now to try as Monoblocks. I am totally happy & the value for money is top of the roof! I really appreciate the FOSI TEAM behind this to design such a great product! Best of luck for your next musical invention!!! Got the second one & set them as monoblocks - sound stage is wider now & details are more cleaner especially the vocals & mid range. I started enjoying my setup now with peace of mind! ### ⭐⭐⭐⭐⭐ Best option for medium size room *by P***U on 13 February 2026* Excellent Sound Quality and compact size with good thermal management. Blindly can go for it. Im using it in 5.2 home theater system. ### ⭐⭐⭐⭐⭐ Value for money preamplifier *by R***N on 19 February 2026* Good preamplifier ## 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/588475459-za3-balanced-stereo-amplifier-home-audio-component-mini-2-channel](https://www.desertcart.be/products/588475459-za3-balanced-stereo-amplifier-home-audio-component-mini-2-channel) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-04-23*