QSC SPA4-60 4 Channel Energy Star Commercial Amplifier 70V / 100V / 4 OhmThe SPA Series from QSC is likely to become your "go-to" amplifier line very quickly. Oozing with power, certified and qualified out the wazoo, with enough flexibility to tackle just about any job you have, these little babies rock.
The SPA4-60 provides 60 watts per channel at 4 or 8 ohms, and can be bridged to supply up to 200 watts at 4 or 8 ohms. Bridged mode will also directly drive high impedance speaker lines, with up to 250 watts at 70V or 100V. The SPA4-60 accomplishes this with a quiet, convection-cooled Class-D amplifier design and universal power supply that team up to keep energy use and operating costs to an absolute minimum without compromising performance.
The SPA4-60 is so efficient that no fan is required, and it features Auto-Ramp circuitry that enables seamless and quiet power up from standby mode, which is automatically engaged after 28 minutes of inactivity -- dramatically reducing energy consumption.
All this power and flexibility is packed into a tiny package that looks great at only 1U, and will fit in a half rack. The included mounting hardware allows quick and easy mounting in a half rack, single- or double-unit mounting in a standard rack, as well as mounting atop or below a shelf or other surface, on a wall, or the unit is also fine freestanding on any suitable surface such as a desktop.
Specifications: • Power output (stereo mode, both channels driven): 60 watts per channel at 4 or 8 ohms • Power output (bridged mode): 200 watts at 4 or 8 ohms; 250 watts at 70V or 100V • Frequency response: 20 - 20,000 Hz, ±1 dB • Signal-to-noise: >100 dB • Input sensitivity at 8 ohms: 1.23V (+4 dBu) • Gain at 8 ohms: 25 dB • Input impedance: >10k, balanced or unbalanced • Maximum input level: 12.3V (+24 dBu) • Front panel indicators: power, signal per channel, protect/limit per channel • Rear panel indicators: bi-color LED signal/protect/limit per channel • Highpass filter: switchable 80 Hz when bridged in 70V and 100V • Additional inputs: remote volume, remote standby • Agency approvals: UL, CE, Energy Star, RoHS/WEEE, FCC Class B; UL 2043 with optional PL-KIT plenum mounting kit (sold separately) • Power requirements: universal power supply - 100 ~ 240 VAC, 50 - 60 Hz • Dimensions: 1.7" x 8.7" x 9.5" (43 x 220 x 241 mm) • Weight: 3.5 lb. (1.1 kg).
Parts Express is authorized to ship QSC products only within the United States, and will only ship QSC products to addresses located within the USA.
Constant Voltage (70-Volt) Audio Systems
Audio distribution systems, especially those commonly used in department stores, warehouses, restaurants, etc., require that many loudspeakers be driven from a single audio amplifier over long runs of speaker wire. The "constant voltage" or "high impedance distribution" audio systems can be complex to understand at first, however, provides many advantages. Learn how to design your own 70-volt or 25-volt loudspeaker system.
