The SPA Series amplifiers from QSC are four, half-rack RU, convection cooled power amplifiers delivering two or four channels of up to 200 watts per channel into 4 O and 8 O. These amps can also be bridged to supply up to 400 watts into 4 O and 8 O, and up to 350 watts into 70 V or 100 V loads making them extremely flexible for Low-Z or High-Z applications. Utilizing an advanced Class-D amplifier design and Universal Power Supply, the SPA Series are efficient, allowing them to be convection cooled and are ENERGY STAR qualified with quiet auto-ramp standby functionality. The SPA Series are housed in an unobtrusive black painted 1/2 RU chassis with unique mounting hardware enabling rack, table and wall mounting capabilities.
Efficient Amplifier with Auto-Ramp
The SPA Series amplifiers utilize a highly efficient class-D design that conserves energy to reduce operational costs and requires no active cooling. They are ENERGY STAR qualified with auto-ramp circuitry that seamlessly transitions to/from Standby with no audible pops.
All amplifiers in the SPA Series feature rms and thermal limiting, as well as protection against over current, short circuit, and under/over voltage.
Protection, Control and Mounting
The SPA Series provide rms and thermal limiting as well as over-current and shortcircuit protection so you can employ them with confidence. They also come with multiple mounting options. Every SPA Series comes with a complete mounting kit allowing it to be rack mounted by itself or with a second unit in a 1RU space. Included connecting brackets provide additional strength when rack mounting two amps together, but also make for simple under-table or wall mounting (like behind a TV). The SPA Series can also be mounted in plenum spaces when used with the Plenum Kit accessory.
Up to 60 watts per channel into 4 and 8 ohms — The outputs of the SPA2-60 and SPA4-60 are designed to provide 60 watts per channel into Low-Z loads
ENERGY STAR® qualified amplifier — The SPA2-60 and SPA4-60 are EnergyStar qualified amplifiers; efficient class-D amplifiers that conserve energy and require no active cooling, so they reduce operational costs.
Bridgeable outputs for higher power — Bridging the outputs of the SPA2-60 and SPA4-60 provide up to 200 watts into low impedance, and up to 250 watts into 70V or 100V providing outstanding flexibility.
Auto-Ramp provides quiet startup and power-down — The EnergyStar Auto-Ramp circuitry ensures quiet and fast power up from Standby and seamless power-down following 28 minutes of inactivity, dramatically reducing power consumption.
Rack-mountable 1U, half rack width enclosure — The SPA2-60 and SPA4-60 can be mounted in 1/2 RU reducing rack space requirements. In addition their clever joining brackets enable easy under-table and wall-mounting.
8 Ohms Dynamic, Both Channels Driven
4 Ohms Dynamic, Both channels Driven
Bridged Mode, Watts per Channel
8 Ohms & 4 Ohms
70V & 100V
Signal to Noise (A-Weighted, 20 Hz - 20 kHz)
1.23 Vrms (+4 dBu)
Maximum Voltage Gain
Frequency Response (20 Hz - 20 kHz)
Frequency Response (20 Hz - 20 kHz)
>10 kO (balanced), >10 kO (unbalanced)
12.3V (+24 dBu)
Switchable 80 Hz when Bridged in 70V & 100V
Front Panel Indicators
Power, per channel Signal, per channel Protect/Limit
4O/8O/70V Bridge Highpass On/100V Bridged Highpass On per channel pair
UL, CE, ENERGY STAR, RoHS/WEEE compliant, FCC Class B (Conducted and Radiated emissions), UL 2043 with PL-Kit
(1) QSC SPA2-60 Power Amplifier (1) Operator's Instructions (1) Power Cable (1) Connector Kit (2) Rackmount Ears (1) Mounting Brackets