--- product_id: 725110695 title: "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" brand: "fosi audio" price: "1441.79 DT" currency: TND in_stock: true reviews_count: 13 url: https://www.desertcart.tn/products/725110695-fosi-audio-za3-compact-tpa3255-balanced-stereo-amplifier-home-audio store_origin: TN region: Tunisia --- # 235W peak mono power XLR/TRS/RCA balanced inputs Advanced V3 cooling design 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 **Brand:** fosi audio **Price:** 1441.79 DT **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your home audio game with power, precision, and style! ## Quick Answers - **What is this?** 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 by fosi audio - **How much does it cost?** 1441.79 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/725110695-fosi-audio-za3-compact-tpa3255-balanced-stereo-amplifier-home-audio) ## 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 - • **Premium Componentry:** Equipped with TPA3255 chip and high-end Japanese & German capacitors for pristine audio fidelity. - • **Customizable Sound Tuning:** Swap out 5 different op-amps to fine-tune your audio signature and stand out sonically. - • **Dual-Mode Power Flexibility:** Seamlessly switch between 180W stereo and 235W mono modes for tailored audio power. - • **Next-Level Thermal Management:** Upgraded chassis with side vents and dust cover ensures stable, long-lasting high output. - • **Pro-Grade Balanced Connectivity:** XLR and 1/4" TRS combo inputs minimize noise and interference for crystal-clear sound. ## Overview The Fosi Audio ZA3 is a compact, high-performance stereo and mono power amplifier featuring up to 235W output in mono mode. It supports balanced XLR/TRS/RCA inputs for low-noise connectivity and incorporates premium components like the TPA3255 chip and Japanese/German capacitors. Its innovative V3 cooling design ensures stable operation, while the op-amp rolling feature allows personalized sound customization. Ideal for home theater and audiophile setups, it comes with a 48V/5A power supply and Japanese manual, delivering professional-grade sound in a sleek, durable aluminum chassis. ## Description Next generation balanced dual mode Class-D power amplifier supports both stereo and mono modes for Fosi Audio's first one At Fosi Audio, there is a story behind every innovation The birth of the ZA3 amplifier is that true user center After the launch of the V3 amplifier, Fosi Audio gathered countless feedback from passionate audiophile audio We wanted to develop an even better amplifier based on V3 Input: RCA, XLR, ¼"TRS; Output: Stereo, Mono SNR≥106dB; THD<0.006%; CINADO: 89dB Frequency response: 20Hz-20kHz (±0.1dB) Rated Power: Stereo 180W*2 @4Ω; Mono 235W @4Ω Start your high-definition auditory adventures with unmatched clarity that delivers great sound! Take your stereo HiFi system to new heights with more power Large chassis, full body heatsink and side ventilation with dust cover for enhanced cooling Compatible with DIP8 dual amp amplifiers to get your favorite sound features It helps to achieve fine volume adjustment according to the human ear hearing characteristics Optimized circuit board layout protects your core audio module from interference for a clearer sound Smooth synchronization with other devices allows for easy one-click power management and integrated audio system operation Delicate sandblast and smooth beveled edge exudes premium exquisite texture and high-end charm ZA3 ZH3 ZP3 ZD3 V3 BT20A PRO TB10D We hope you enjoy our products as much as we enjoy making them. Fosi Audio designs and builds innovative audio products with every music needs in mind. Excellent sound, simple and elegant design, high quality components and truly useful features are what Fosi Audio's pursuit. This amplifier has a balance input that can be switched between mono and stereo modes. Integrated high quality components and innovative heat dissipation design ensure high and stable performance. Nostalgic Amplifier with VU Meter ## Features - 【Dual Mode Innovation】This new generation mini amplifier provides both stereo mode and mono mode flexibly adapts to various needs and allows seamless mode switching. It provides a robust output up to 180W in stereo mode, but it rises up to 235W in mono mode. Pairing two ZA3 units in a mono configuration creates a powerful audio system that greatly enhances the listening experience - 【More Connectivity】The ZA3 audio amplifier with balanced input and trigger input, supports both XLR and 1/4" TRS plug. This design minimizes interference and reduces noise floors. 12V trigger input connector allows syncing Work with other devices to efficiently turn on/off without individual operation - 【High Quality Components】The ZA3 is equipped with TPA3255 high-end class-D amplifier chip, utilizing premium Japanese NCC, ELNA, German-made WIMA capacitors, and Japanese smid inductors to deliver exceptional audio quality. Provides exceptional clarity and low distortion with up to 106dB SNR and low noise floor of only 150μV - 【Innovative Heat Dissipation Design】Based on the V3's revolutionary heat dissipation design, the ZA3 cooling system has been upgraded by increasing the chassis, moving the air vent to the side, adding dust cover to improve ventilation, and achieving continuous and stable high output - Scalable Fun: Customize your audio experience with the operational amp rolling function. The ZA3 features five interchangeable operational amplifiers for left and right channel output, balanced input, and subwoofer output. Try compatible DIP8 dual operational amplifiers such as Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4558, LM4562, LME49720HA and fine-tune your sound to perfection - Note: 1) This product's power switch is on the total volume knob. Press the total volume knob for 2 seconds to turn on. 2) When connecting, make sure the plug of the cable matches the interface and the plug is inserted into place. Check and replace the cable that might be damaged. 3) Before using this product, please make sure the power of the speaker is matched with this product. 4) When you use it, you can turn off the Bluetooth function of other Bluetooth devices to reduce the signal interference. 5) Make sure the audio source is output successfully or the speaker is working normally - Why does small sparks come out when wiring? This is a normal phenomenon. Here's why: 1. Current change: When the power amplifier is working, a certain current will pass through the output end. Circuit changes from open circuit to closed when speaker touches the output port of the power amplifier. Current rises rapidly from zero to stable value. This sudden current change creates an instant high voltage and spark occurs ②Capacitor discharge: Normally there are energy storage components inside the power amplifier, such as filter capacitor, and these capacitors may accumulate a certain amount of charge after the power amplifier is turned off. Once the speaker is connected, the capacitor discharges through the speaker, creating an instant current pulse formed creating a spark - Is it possible to adjust treble and bass in RCA/XLR output mode? Not supported. Headphone Output Mode (PO) only supports treble and bass adjustment. If the user wants to add bass when using the speaker, it is usually meant to connect a dedicated subwoofer. In addition, the RCA/XLR output is not equipped with this function as the addition of treble and bass adjustments may cause slight noise - 【※】For better heat dissipation, it is recommended to use Fosi Audio cooling fan with amplifier ## Technical Specifications | Specification | Value | |---------------|-------| | Amazon Bestseller | #26,329 in Electronics (See Top 100 in Electronics) #29 in Audio Component Power Amplifiers | | Asin | B0CLP4T5L7 | | Brand Name | Fosi Audio | | Country Of Origin | China | | Customer Reviews | 4.5 4.5 out of 5 stars (1,324) 4.5 out of 5 stars | | 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 | | Number Of Items | 1 | | Part Number | ZA3 | | Voltage | 48 Volts | | Warranty Description | 2 years | ## Product Details - **メーカー:** China - **商品寸法 (長さx幅x高さ):** 15.5 x 18.4 x 5.1 cm - **最大供給電圧:** 48 ボルト - **最小電源電圧:** 48 ボルト - **電圧:** 48 ボルト ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/51XgZUlMEQL.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/71L9wSwJTiL.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/71GhZVLLF5L.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/71ikPKBB6eL.jpg) ![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 - Image 5](https://m.media-amazon.com/images/I/71Tryabr-oL.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 ### ⭐⭐⭐⭐⭐ コスパ良し、耐久性も今のところＯＫ *by on Reviewed in Japan April 29, 2026* NS-10M使用でニアフィールド用に購入．100W駆動なら充分、ちょっと低音強調気味（特性測ってません）ですが、2万円なら充分な性能です．なにより中国製にしてはS/N良好で、volume50%でもノイズフロアがほぼ聞こえません．専用のACアダプタが効いているようです．当方は一応音響メーカー勤務、サウンドデザインの経験ありです． ### ⭐⭐⭐⭐⭐ Extremely good sound quality *by on Reviewed in Japan August 12, 2026* Replaced with QUAD 606 amplifier used with JBL T595. sound quality is extremely well for this configuration. I'm very much satisfied with Fosi Audio ZA3. ### ⭐⭐⭐⭐ 優れたバランスアンプ *by on Reviewed in Japan July 17, 2026* このアンプはバランス入力のクオリティが高いと思います。是非バランス入力を活用しましょう。音数が多く、クリアで音場も一回り広く、押し出しも強くなります。 ## 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/725110695-fosi-audio-za3-compact-tpa3255-balanced-stereo-amplifier-home-audio](https://www.desertcart.tn/products/725110695-fosi-audio-za3-compact-tpa3255-balanced-stereo-amplifier-home-audio) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-10-05*