This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.
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Fosi Audio ZA3 Balanced Stereo Amplifier 235W with 48V Power SupplyStereo & MonoThe 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 InnovationAt Fosi Audio, every innovation has a story, and the creation of the ZA3 amplifier is one rooted in our users' voices. After releasing the V3 amplifier, we received extensive feedback from dedicated audiophiles. Many urged us to develop an even more advanced amplifier building on the foundation of the V3.
TI TPA3255 Amp Chip IntegratedDelivers exceptional sound quality and ultra-low distortion throughout the audio range while maintaining Class-D efficiency.
Advanced Heat Dissipation DesignImproved thermal performance through a larger chassis, full-body heatsink, and side ventilation protected by dust covers.
Swappable Op-AmpsCompatible with DIP8 dual op-amps, allowing you to swap and tailor the sound signature to your personal preference.
Separated Digital & Analog ModulesAn optimized circuit board layout shields critical audio components from interference, resulting in cleaner, more accurate sound.
12V Trigger Sync InterfaceSeamless integration with other devices allows for convenient one-click power control, streamlining your audio system's operation. (Use a 3.5mm stereo trigger cable for the ZA3's trigger input—please note it takes a few seconds for the trigger to activate the ZA3.)
Aluminum Alloy and One-Piece Molded ChassisFeatures fine sandblasting and gently beveled edges, offering a refined texture and a sophisticated, high-end aesthetic.
Logarithmic PotentiometerEnables precise volume adjustment tailored to the auditory sensitivity of the human ear.
Dual-Mode Innovation The ZA3 mini amplifier supports both stereo and mono modes, offering flexibility for a wide range of audio setups with effortless switching. It delivers up to 180W in stereo and up to 235W in mono; pair two ZA3 units in mono for a powerful, immersive listening experience.
Richer Connectivity As Fosi Audio’s first amplifier with balanced input and trigger-in, the ZA3 features a combo connector supporting XLR and 1/4" TRS plugs, minimizing interference and lowering the noise floor. The 12V trigger-in allows synchronized power control with other devices for streamlined operation.
Audiophile-Grade Components Equipped with the TPA3255 Class-D amp chip, the ZA3 incorporates high-quality components including Japanese NCC, ELNA, German WIMA capacitors, and Japanese Sumida inductors. It delivers detailed sound with up to 89dB SINAD, 106dB SNR, and an ultra-low 150μV noise floor.
Advanced Heat Dissipation Building on the V3’s heat management design, the ZA3 features an enlarged chassis, side ventilation with dust covers, and improved airflow to support stable high-power performance over extended sessions.
Enhanced Scalable Fun The ZA3 offers op-amp rolling with five swappable DIP8 slots for customizing the sound signature across left/right channels, balanced input, and subwoofer output. Compatible with op-amps like Sparkos SS3602, MUSES02, OPA2604, OP249, AD827, and others, it lets you fine-tune your system to your exact preferences.
Specifications
Chip Set: Texas Instruments TPA3255Output Power: With 48V/5A PSU Stereo; 155Wx2 @4Ω; Mono: 235Wx1 @4Ω With 32V/5A PSU Stereo; 95Wx2 @4Ω; Mono: 110Wx1 @4ΩTerminating Impedance: 2-8ΩInput Mode: RCA, XLR, 1/4" TRSOutput Mode: Speaker Output (supports banana plug or bare wire connection), Active Subwoofer OutputFrequency Range: 20Hz - 20KHz(±0.1dB)
SINAD: 89dBTHD: ＜0.006%SNR: ≥106dBDynamic Range: ≥106dBDevice Dimension: 15.49 x 18.39 x 5.08 cm; 1.78 KilogramsDC Input Range: 24-48VPower Supply: 32V/5A, 48V/5A
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.