4-Ch Power Amp, 4x60W @ 4/8 ohms, 2x250W @ 70V, EnergyStar
Item #0040-0836 Model #SPA460
List price


QSC SPA4-60 4x60W, 2x250W EnergyStar Power Amplifier

The SPA4-60 amplifier from QSC is a half rack 1U, convection cooled power amplifiers delivering four channels of 60 watts per channel into 4Ω and 8Ω. This amp can also be bridged to supply two channels at 200 watts into 4Ω and 8Ω or two channels at up to 250 watts into 70V or 100V loads making it extremely flexible for Low-Z or High-Z applications.  Utilizing an advanced Class-D amplifier design and Universal Power Supply the SPA Series is amazingly efficient allowing them to be convection cooled and are ENERGY STAR® qualified with quiet auto-ramp standby functionality.  The SPA4-60 is housed in an unobtrusive black painted 1/2 RU chassis with unique mounting hardware enabling rack, table and wall mounting capabilities.


  • Up to 60 watts per channel into 4 and 8 ohms — The outputs of the SPA2-60 is designed to provide 60 watts per channel into Low-Z loads
  • ENERGY STAR® qualified amplifier — The SPA4-60 is an EnergyStar qualified amplifier; 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 SPA4-60 provides 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.



Stereo Mode, watts per channel  
8Ω dynamic, both channels driven 60 watts
4Ω dynamic, both channels driven 60 watts 
Bridged Mode, watts per channel  
8Ω & 4Ω dynamic 200 watts
70V & 100V 250 watts
Signal to Noise (A weighted, 20 Hz–20 kHz) >100 dB
Input Sensitivity 1.23 Vrms (+4 dBu)
Maximum Voltage Gain 25.0 dB
Output Circuitry Class D
Frequency Response (20 Hz - 20 kHz) +0.1 dB, -0.1 dB
Input Impedance >10 kΩ (balanced), >10 kΩ (unbalanced)
Maximum Input Level +12.3V (+24 dBu)
Highpass Filter Switchable 80 Hz when Bridged in 70V & 100V
Front Panel Indicators Power, per channel Signal, per channel Protect/Limit
Controls 4Ω/8Ω/70V Bridge Highpass On/100V Bridged Highpass On per channel pair
Dimensions (HWD) inches 1.7 x 8.7 x 9.5 / 1RU
Dimensions (HWD) mm 43 x 220 x 241 / 1RU
Weight (Net) 3.5 lb / 1.6 kg
Weight (Shipping) 5.5 lb / 3.0 kg
Agency Approvals UL, CE, ENERGY STAR, RoHS/WEEE compliant, FCC Class B (Conducted and Radiated emissions), UL 2043 with PL-Kit
Carton and Contents Power cable, quick start guide, connector kit, rack mount ears, mounting brackets