The Yamaha STAGEPAS 400BT is a portable PA system with a powered mixer and two passive speakers, designed for performances, presentations, and mobile DJ setups. Its eight-channel mixer provides four mono mic/line inputs and four additional inputs arranged as two stereo pairs, so you can connect microphones and instruments alongside stereo playback. Bluetooth audio streaming also makes it easy to play audio wirelessly through the system.

Onboard tools help shape sound for a live setup: four SPX digital reverb programs add ambience, while two-band channel EQ and Yamaha’s 1-Knob Master EQ offer tone control. A feedback suppressor helps manage unwanted feedback, and channel 4 has a Hi-Z switch for compatible instrument connections. The mixer also includes monitor outputs and a mono subwoofer output, giving you options for monitoring and system expansion.

• System configuration: Powered mixer with two passive speakers
• Dynamic power rating: 400 W total (200 W + 200 W)
• Speaker drivers: Per speaker: 8-inch woofer and 1-inch voice-coil compression driver
• Frequency range: 55 Hz–20 kHz (-10 dB)
• Maximum SPL: 125 dB SPL per speaker, peak IEC noise at 1 m
• Net weight: 18.3 kg (40.3 lb) for the system