Description
Compact TPA3255 Class-D amplifier with selectable stereo or mono operation, stereo RCA and balanced XLR/TRS input options, a line-level output for an active subwoofer, and a 12 V trigger input. The two speaker-output ratings use Fosi's current online instructions: 155 W per channel into 4 ohms with a 48 V/5 A supply. The same guide rates stereo output at 95 W per channel with 32 V/5 A, and mono output at 235 W into 4 ohms with 48 V/5 A. Published limits are THD+N below 0.006%, SNR at least 106 dB, and speaker loads of 2-8 ohms. Power depends on supply and operating mode. Power-rating source: https://fosiaudio.com/pages/user-instruction-za3
Specifications
| Inputs | 1 × RCA analog line 1 × XLR/balanced analog |
|---|---|
| Outputs | 2 × 155 W @ 4 Ω 1 × Subwoofer output |
| Supply type | DC |
| Voltage range | 24 V–48 V |
| Amplifier class | Class D |
| Frequency response | 20 Hz–20 kHz |
| THD+N | 0.01 % |
| Signal-to-noise ratio | 106 dB |