Fosi Audio ZA3
- 2 reviews
- Fosi Audio
Description
1. Professional-Grade Balanced Power
The Fosi Audio ZA3 is a breakthrough in compact high-fidelity amplification. Engineered for enthusiasts who demand precision and versatility, it features a fully balanced architecture and the high-end Texas Instruments TPA3255 chip. Whether used as a standalone stereo amp or paired as dual-mono blocks, the ZA3 delivers a level of sonic transparency usually reserved for high-end rack gear.
2. Key Features & Innovations
Innovative Stereo/Mono Switchable Design
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Dual-Mode Versatility: The ZA3 is a "chameleon" in your setup. Use it in Stereo Mode for a classic 2.0 desktop system, or flip the switch to Mono Mode to harness massive power for a single speaker. This allows you to scale your system by adding a second ZA3 later for a true dual-mono configuration.
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Subwoofer Out: Includes a dedicated active subwoofer output with a built-in crossover, making it easy to create a powerful 2.1 or 0.1 home theater foundation.
Audiophile Components & Connectivity
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XLR Balanced Input: To ensure a noise-free signal, the ZA3 features XLR balanced inputs that reject electromagnetic interference, ideal for long cable runs and professional DAC connections.
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Premium Internal Hardware: Built with high-quality Japanese NCC and ELNA capacitors and German WIMA inductors, ensuring a stable power supply and a refined, airy high-end.
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Replaceable Op-Amps: Features DIP8 sockets for Op-Amp rolling. Enthusiasts can swap the stock TI NE5532 for Muses02 or OPA2134 to fine-tune the sound texture.
Advanced Thermal Management
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Reinforced Cooling: The entire CNC aluminum chassis acts as a giant heatsink, complemented by an innovative side-ventilation design to ensure stable performance even during high-output sessions.
3. Technical Specifications
| Component | Specification |
| Amp Chip | Texas Instruments TPA3255 |
| Power Output | Stereo: 155W x2 @4Ω / Mono: 235W @4Ω |
| Input Mode | XLR Balanced, RCA Unbalanced |
| Output Mode | Speaker Out, Subwoofer Out |
| Frequency Response | 20Hz - 20kHz (±0.1dB) |
| SNR / THD | ≥ 106dB / ≤ 0.006% |
| Op-Amp | TI NE5532 (Replaceable) |
4. Why the ZA3 is the New Industry Standard
The Fosi Audio ZA3 represents the evolution of Class D amplification. It bridges the gap between affordable desktop audio and high-end Hi-Fi. By supporting balanced inputs and providing a Mono-block option, it gives you a professional path to upgrade your audio system without replacing your entire setup.
Specifications
- Weight: 200gr
- Usage: Indoor & outdoor
Pros and cons
- Sustainably produced
- Ideal for everyday use
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FosiAudioZA3
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
- SNR≥106dB; THD<0.006%; SINAD: 89dB; Frequency Response: 20Hz-20kHz (±0.1dB)
- Rated Power Output: Stereo 180W*2 @4Ω; Mono 235W @4Ω
TI TPA3255:Amp chip
Integrated
Enabling superior sound and ultra-low distortion across the audio band
with Class-D efficiency.
Swappable Op-Amps
Compatible with DlP8 dual op-amps. Roll them to get your preferred sound
signature.
12V Trigger Sync Interface
Aluminum Alloy and One-Piece Molded Chassis
Aluminum Alloy and One-Piece Molded Chassis
Productdetails
Description
- Dual-Mode Innovation: This new generation mini amplifier offers both stereo and mono modes, and adapts flexibly to your diverse needs, allowing seamless mode switching. In stereo mode, it delivers a robust output of up to 155W, 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, OPA2134PA, OP249, AD827, RM4558, LM4562, LME49720HA, etc. to fine-tune your sound to perfection.
- What you Get: ZA3 Power Amplifier x1, Power Adapter x1 (The plug of the power adapter will match the country of your delivery address), User Manual x1, our worry-free 24-month warranty, and friendly customer service.
Specifications
- Chip Set: Texas Instruments TPA3255
- Output Power:
With 48V/5A PSU Stereo; 155Wx2 @4Ω; Mono: 235Wx1 @4Ω
With 32V/5A PSU Stereo; 95Wx2 @4Ω; Mono: 110Wx1 @4Ω - Terminating Impedance: 2-8Ω
- Input Mode: RCA, XLR, 1/4" TRS
- Output Mode: Speaker Output (supports banana plug or bare wire connection), Active Subwoofer Output
- Frequency Range: 20Hz - 20KHz(±0.1dB)
- SINAD: 89dB
- THD: ＜0.006%
- SNR: ≥106dB
- Dynamic Range: ≥106dB
- Device Dimension: 15.49 x 18.39 x 5.08 cm; 1.78 Kilograms
- DC Input Range: 24-48V
- Power Supply: 32V/5A, 48V/5A
What‘s in the box？
- ZA3 Power Amplifier x 1
- 32V/5A or 48V/5A Power Adapter x 1
- User’s Manual x 1
FAQs
Stereo Mode
Replacing the op amps for both left and right channels in stereo mode, regardless of RCA or XLR inputs, will notably enhance sound quality.
Mono Mode: Only replacing the op amps for the right channel.
XLR Input
Using XLR input mode allows for further sound quality enhancement by replacing the op amps for the XLR channel.
Subwoofer Channel
If a subwoofer is connected, there's the option to replace the op amps responsible for the subwoofer channel.
Note: Carefully align the notch/the number '1' on the chip's cover with the 'O1' mark on the PCB.
Here is a tutorial video for your reference: https://youtu.be/VvYYwxAfBi4