Fosi Audio
Fosi Audio ZA3 Balanced Speaker Amplifier
Best For: XLR Input
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The flagship balanced Class D desktop amplifier from Fosi Audio. Featuring the high-end TPA3255 amp chip, the ZA3 supports both RCA and professional balanced XLR inputs.
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Product Overview
The flagship balanced Class D desktop amplifier from Fosi Audio. Featuring the high-end TPA3255 amp chip, the ZA3 supports both RCA and professional balanced XLR inputs. It can be easily toggled between Stereo mode (155W x2 @ 4Ω) and Mono block mode (235W x1 @ 4Ω) for ultimate power flexibility. Features replaceable op-amps and an elegant orange volume control knob.
Key Features
- Amplifier Chip: Texas Instruments TPA3255
- Inputs: Balanced XLR / RCA Stereo
- Output Mode: Stereo / Mono switchable
- Max Power Output: 235W @ 4Ω (Mono, with 48V power)
- THD: 0.006%
Technical Specifications
| Chip | TPA3255 |
| Power Output | 235W @ 4Ω mono |
| Input | XLR / RCA |
| THD | 0.006% |
| Mode | Stereo / Mono switchable |
Pros
- Excellent sound quality for the price
- Great budget fidelity
- Robust build quality
Cons
- Requires adequate source output power
- Standard accessories
Price & Availability Disclaimer: Catalog source last checked on June 9, 2026. Confirm the exact model and specifications with the manufacturer. Retailer prices and stock levels can change. The price, availability, shipping terms, taxes, returns, and warranty terms shown by the external retailer at the time of purchase will govern the sale.