Fosi Audio ZA3 Balanced Stereo Amplifier - 48v DC

Fosi Audio ZA3 Hi-fi Stereo Balanced Amplifier With Subwoofer Output

Overview

The Fosi Audio ZA3 (48 V) is a compact, fully balanced Class D amplifier designed to bring high-fidelity sound to any desktop or home setup. It embodies Fosi Audio’s philosophy of delivering audiophile-level performance in a minimalist, approachable form. Built around precision engineering and thoughtful design, the ZA3 combines clean power, natural tonality, and everyday versatility in one elegant unit.

At the heart of the Fosi ZA3 stereo amp is the Texas Instruments TPA3255 chipset — a benchmark in high-efficiency Class D amplification. Using the supplied 48 V / 5 A power supply, the ZA3 amplifier delivers 155 watts × 2 into 4 ohms in stereo mode or 235 watts × 1 in mono mode. Despite its compact footprint, the ZA3 offers commanding control and resolution, delivering tight, extended bass, open midrange detail, and smooth, fatigue-free highs. Its sound signature feels balanced and lively, suited to both critical listening and casual enjoyment.

Connectivity is comprehensive yet simple. The Fosi ZA3 features balanced XLR / TRS and RCA inputs, making it compatible with DACs, preamps, and streamers alike. A dedicated active subwoofer output allows effortless 2.1-channel integration. Whether driving a pair of bookshelf speakers or serving as a monoblock in a larger system, the ZA3 from Fosi adapts seamlessly to the needs of the listener.

Internally, Fosi Audio uses audiophile-grade components such as Nichicon, WIMA, and ELNA capacitors, chosen for precision and tonal balance. The amplifier’s THD + N rating below 0.006 percent and dynamic range over 106 dB reveal a clean, transparent presentation. An upgradable DIP-8 op-amp socket lets enthusiasts fine-tune the character of the amplifier to their taste, offering rare flexibility in this category.

The all-aluminium chassis of the ZA3 amp is both lightweight and robust, designed for thermal stability and silent operation. At only 1.78 kilograms, the Fosi ZA3 feels solid yet compact, with a brushed metal finish that complements any modern audio space. Every detail — from its smooth volume control to its sturdy connectors — reflects Fosi’s dedication to functional elegance.

For Groove Central listeners, the Fosi Audio ZA3 (48 V) is more than an entry-level amplifier. It’s a statement in efficiency, musicality, and craftsmanship. Whether used on a desktop, in a minimalist hi-fi system, or as part of a dual-mono setup, it delivers engaging sound that feels natural and precise — proof that great audio doesn’t need to be complicated.

Key Features

• The Texas Instruments TPA3255 chip delivers high-efficiency, low-distortion amplification with excellent dynamics.

• With 155 watts per channel @ 4 ohms (stereo) or 235 watts @ 4 ohms (mono) with the 48 V power supply.

• Balanced XLR / TRS and RCA inputs ensure flexible connectivity with a wide range of source components.

• Active subwoofer output supports 2.1-channel integration without external crossovers.

• THD + N below 0.006 percent and dynamic range above 106 dB for clear, natural sound.

• Premium Nichicon, WIMA, and ELNA capacitors deliver stable, musical performance.

• Upgradable DIP-8 op-amp socket allows custom tuning of tonal character.

• Solid aluminium chassis ensures effective heat dissipation and long-term reliability.

• Compact (155 × 184 × 51 mm) and lightweight (1.78 kg) for desktop or rack placement.

• Includes a 48 V / 5 A power adapter for full rated performance.

Technical Stuff 

For More Information

Visit the manufacturer's website.

Returns Policy

groovecentral.com.au handles returns and processes refunds in accordance with the Australian Consumer Protection legislation.

Should you wish to return your order, please notify us within 14 days of purchase with a valid reason for return. If we are unable to resolve your complaint or further assist you, we will process a refund upon timely receipt of the goods purchased. Unopened goods will be refunded in full. Refunds will be processed promptly and payment made by the same method that you made payment. All refunds are made at the discretion of groovecentral.com.au.

Shipping

Physical goods may be delivered by Australia Post and/or other reputable courier companies. Deliveries are processed promptly upon receipt of full payment. Delivery may take between 2 and 14 days, depending on the delivery option. Damaged or lost orders should be resolved with Australia Post or the courier company directly and we are not responsible for goods that are damaged in transit or not received. Replacement of damaged or lost items is made at the discretion of groovecentral.com.au.

Digital goods are delivered immediately. Please be aware there are inherent risks associated with downloading any software and digital goods. Should you have any technical problems downloading any of our goods, please contact us so we may try to assist you.