QSC SPA4-100 Four Channel Commercial Amplifier

The SPA4-100 is a four-channel, half-rack commercial amplifier delivering up to 100 watts per channel into 4 or 8 ohms, or up to 175 watts per bridged channel pair into 70V or 100V. A Class-D output stage and Universal Power Supply keep it fully convection cooled with no fan noise, and ENERGY STAR auto-ramp circuitry drops it into standby after 25 minutes of silence with a seamless, pop-free wake when signal returns.

The 1U half-rack chassis mounts alone or paired with a second SPA amp in a single rack space, and included connecting brackets also make simple under-table or wall mounting straightforward. RMS and thermal limiting plus over-current and short-circuit protection are built in, and a Plenum Kit accessory extends it to plenum-rated installs.

Channels	4, up to 100 W per channel into 4 ohm or 8 ohm
Bridged Output	Up to 200 W into 4/8 ohm, 175 W per pair into 70V or 100V
Frequency Response	20 Hz - 20,000 Hz +/- 0.1 dB (4/8 ohm)
Output Circuitry	Class D
Signal to Noise	>100 dB (20 Hz - 20 kHz)
Cooling	Convection, fanless
Chassis	1RU, half-rack width
Net Weight	4.0 lb (1.4 kg)