SMSL PA400 Gallium Nitride 500Wx2 Power Amplifier PGA2311 Chip Audio Amp
SMSL PA400 Gallium Nitride 500Wx2 Power Amplifier PGA2311 Chip Audio Amp
# SMSL PA400 | GaN 500Wx2 Class D Stereo Power Amplifier with PGA2311
The SMSL PA400 is a high-performance GaN Class D power amplifier designed for audiophile home speaker systems. Featuring Infineon Gallium Nitride power transistors, TI PGA2311 precision volume control chip, ultra-high switching frequency up to 1MHz, it delivers massive clean power and ultra-low distortion. Supporting stereo and mono bridged modes, paired with balanced XLR and RCA inputs, it easily drives large passive speakers and serves as the ideal power stage for your Hi-Fi system.
✅ **Infineon GaN Gallium Nitride Power Transistors**
Adopts advanced Infineon GaN FETs with 1MHz high switching frequency. It produces smoother full-range sound, reduces digital harshness and preserves delicate musical texture. GaN technology achieves high efficiency while maintaining low heat generation for stable long-hour playback.
✅ **TI PGA2311 Precision Analog Volume Chip**
Equipped with Texas Instruments PGA2311 digitally controlled analog volume ladder chip. It provides highly accurate volume adjustment and ultra-low distortion, keeping the audio signal pure without signal degradation during volume tuning.
✅ **Massive Clean Power, Stereo & Mono Bridged Mode**
Stereo mode: 250W×2 @4Ω, 200W×2 @8Ω. Mono bridged mode outputs up to 500W. You can use two PA400 units for multi-channel high-power setup, effortlessly driving hard-to-drive large passive speakers.
✅ **Excellent Audio Performance Metrics**
THD+N as low as 0.0004% (@1kHz,8Ω), SNR reaches 115dB, channel separation 75dB. It delivers ultra-quiet background, clean transients and rich dynamic range for music reproduction.
✅ **Rich Inputs & Complete Protection Circuit**
Gold-plated XLR balanced and RCA single-ended inputs, high-current gold-plated speaker binding posts. Built-in full protection circuits including over-temperature, over-current safeguards. CNC aluminum alloy chassis reduces resonance and blocks electromagnetic interference.
