SPA-Qf 60x4 A&E Specs

The power amplifier shall be a four-channel network-processing device that is designed to operate exclusively with a QSC Q-SYS ecosystem on a Gigabit Ethernet network. The amplifier shall be powered by a universal switch-mode power supply that supports operation at any AC voltage from 100 to 240 V at 50 or 60 Hz. The power supply shall have power factor correction (PFC) to make the current flow nearly sinusoidal and analogous to the voltage waveform. The amplifier shall offer power save mode to automatically reduce AC power consumption during idle time. The amplifier shall be convection cooled, with the vents at the rear, the side and the front.

The amplifier shall utilize a class D output circuit topology with four individual channels providing up to 240 watts total rated power. The amplifier shall be configurable via Q-SYS, including arranging the output channels as single units as well as in bridged, Hi-Z 100V and Hi-Z 70V combinations. When in bridged and Hi-Z mode, the loudspeaker cables shall be connected to adjacent channels + and – outputs. The amplifier’s audio signals shall originate in the Q-SYS ecosystem and shall also be configurable in Q-SYS Designer Software (QDS).

The power amplifier shall have two flex channels that can be configured as either analog mic/line audio inputs or line level outputs that stream digital audio data into/from the Q-SYS ecosystem in the form of Q-LAN data delivered via the network port. The impedance of each input shall be greater than 10 kΩ balanced or 5 kΩ unbalanced.

The power amplifier shall meet the following performance criteria: typical distortion (into 8 ohm loads) of 0.07% to 0.1%; maximum distortion (4 to 8 ohms) of no worse than 1%; a frequency response (into an 8 ohm load) from 20 Hz to 20 kHz at +0.2/-0.8 dB; Signal to Noise Ratio> -100 dB.

Channel muting and gain shall be controllable via the Q-SYS ecosystem. The amplifier shall indicate network status and monitoring, including faults.

The amplifier shall have output load monitoring on each output. The load monitor shall have the range to detect and calculate impedance of conditions including short circuits, low impedance loudspeakers, and lightly loaded 70 V and 100 V lines. The load monitor shall report the calculated load impedance on each channel via the Q-SYS network. The amplifier front panel shall feature Power LED, Fault LED and Individual Channels Signal and Limit/Protect LEDs. The front panel shall also feature one ID button to identify the product in QDS.

The amplifier rear panel shall feature a single RJ-45 jack for connecting to the Q-LAN network, enabling integration into the Q-SYS ecosystem for bi-directional passage of digital audio, control signals, and status monitoring data. The rear panel shall provide one blue 6-pin 3.5mm Euro connector for the Flex Channels and two green 4-pin 5mm Euro connectors for loudspeaker cable connection. The amplifier rear panel shall also provide one black 6-pin 3.5mm Euro connector for four GPIO pins, one 3.3V Power pin and one Ground pin that extend Q-SYS control to or from external devices.

The amplifier shall be 1.75 in (44 mm) high, 8.7 in (221 mm) wide, and 11.25 in (286 mm) deep. The amplifier shall have a net weight of 6.4 lb (2.9 kg).

The multi-channel system-processing amplifier shall be the QSC Q-SYS SPA-Qf 60x4.