About QSC SPA4-60 60-Watt Four-Channel Commercial Power Amplifier
The SPA Series amplifiers from QSC are four half rack 1U, convection cooled power amplifiers delivering two or four channels of up to 200 watts per channel into 4Ω and 8Ω. These amplifiers can also be bridged to supply up to 400 watts into 4Ω and 8Ω, and up to 350 watts into 70V or 100V 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 amazingly efficient allowing them to be convection cooled and are ENERGY STAR qualified with quiet auto-ramp standby functionality. The SPA Series amplifiers are housed in an unobtrusive black painted 1/2 RU chassis with unique mounting hardware enabling rack, table and wall mounting capabilities.
The SPA2-60 two channel amplifier and QSC SPA4-60 60-watt four-channel commercial power amplifier both deliver 60 watts rms per channel into 4 or 8 ohms; the channels can also be bridged providing up to 200 watts rms into 4 or 8 ohms per channel pair. The bridged channels can be switched into 70V or 100V direct drive mode providing up to 250 watts rms into a 70V or 100V output. An 80Hz highpass filter is engaged when in 70V or 100V mode ensuring that distributed loudspeaker transformers are not overdriven and saturated by too much low frequency content.