MPA-Q 8x125

The network power amplifier shall be an eight-channel network-processing power amplifier designed to operate as part of a Q-SYS ecosystem on a Gigabit Ethernet network. The amplifier shall be powered by a universal switch-mode power supply supporting operation from 100–240 VAC at 50/60 Hz and shall include power factor correction (PFC). The amplifier shall offer multi-stage sleep modes to automatically reduce AC power consumption during idle time. The amplifier shall be cooled by forced air, with the intake at the front and exhaust at the rear. The fan speed shall be thermally controlled.

The amplifier shall support Power over Ethernet (PoE) on one network port to power the internal processor and network communications in the absence of AC mains power. When powered via PoE, the amplifier shall remain fully configurable and manageable via Q-SYS software and front-panel controls, with audio input and output disabled until mains power is restored. When mains power is restored, audio input and output shall be restored within seconds.

The amplifier shall utilize a Class D output topology with eight independent output channels. Each channel shall deliver its advertised peak power into low-impedance or high-impedance loads, with support for Lo-Z (2–16 ohms) and Hi-Z (70V/100V) operation selectable in software. Adjacent channel pairs shall be configurable for bridged operation, providing double the single-channel power, except into 2-ohm loads. Peak power is 125 watts per channel.

The amplifier shall support dynamic peak power sharing between channels, allowing unused power capacity on lightly loaded channels to be temporarily reallocated to channels with higher transient demand.

The amplifier shall accept eight balanced line-level analog audio inputs, with a maximum input level of +24 dBu. Analog inputs shall be configurable for Q-SYS mode, Standalone mode (automatic failover to analog inputs upon network audio loss), or Analog mode (standalone analog operation without network connectivity).

The amplifier shall include onboard DSP processing, including digital gain, delay, loudspeaker voicing, protection limiting, tone generation, and impedance monitoring. The amplifier shall provide voltage, current, and impedance monitoring on each output channel, reporting measured values and fault conditions to the Q-SYS system.

The rear panel shall include dual RJ-45 network ports for redundant Q-LAN networking, balanced analog audio inputs via Euro connectors, loudspeaker outputs via Euro connectors, GPIO/Relay connections via Euro connector, and an IEC mains power inlet.

The front panel shall include power, ID, mute, and fault indicators, per-channel signal and clip/limit indicators, bridged-mode indicators, and a character display with rotary encoder for configuration and monitoring.

The amplifier shall occupy 2RU rack space, shall be 19 inches wide, and shall be suitable for permanent installed sound reinforcement applications.

The network power amplifier shall be the QSC Q-SYS MPA-Q 8x125.