QSC SPA4-60 4-Channel Compact Power Amplifier, 60W at 4 Ohms, 70V

The SPA Series amplifiers from QSC are two half rack 1U, convection cooled power amplifiers delivering two or four channels of 60W per channel into 4 Ω and 8 Ω. The two channels can be bridged to supply 200W into 4 Ω and 8 Ω - and up to 250W into direct drive 70 V or 100 V mode - making them flexible for Low-Z or High-Z applications. There is also a selectable 80 Hz highpass filter for bridged operation, ensuring that 70 V or 100 V loudspeaker transformers are not overdriven and saturated by too much low frequency content. Utilizing an advanced Class-D amplifier design and Universal Power Supply, the SPA Series are remarkably efficient and are ENERGY STAR® qualified with quiet auto-ramp standby functionality.

The SPA4-60 is housed in an unobtrusive black painted 1/2 U chassis with clever joining brackets that enable easy under-table and wall-mounting. It's ideal for stereo or mono applications of voice or music audio content, and offers a powerful yet affordable amplifier that meets the needs of boardrooms, conference rooms and other corporate spaces where multiple speakers are in use.

Includes

• Power cable
• Quick start guide
• Connector kit
• Rack-mount ears
• Mounting brackets

Features

• Up to 60W per channel into 4 Ω and 8 Ω
• ENERGY STAR qualified, efficient Class-D amplifier that conserves energy and requires no active cooling, so it reduces operational costs
• Bridging the outputs provides up to 200W into low impedance, and up to 250W into 70 V or 100 V providing outstanding flexibility
• The ENERGY STAR 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

Specifications

• Stereo Mode, Watts Per Channel
  • 8 Ω dynamic, both channels driven: 60W
  • 4 Ω dynamic, both channels driven: 60W
• Bridged Mode, Watts Per Channel
  • 8 Ω and 4 Ω dynamic: 200W
  • 70 V and 100 V: 250W
• 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: +12.3 V (+24 dBu)
• Highpass Filter: Switchable 80 Hz when bridged in 70 V and 100 V
• Front Panel Indicators: Power, per channel Signal, per channel Protect / Limit
• Controls: 4 Ω / 8 Ω / 70 V Bridge Highpass, On / 100 V Bridged Highpass, On per channel pair
• Dimensions (H x W x D): 1.7" x 8.7" x 9.5" (43 x 220 x 241 mm)
• Weight (Net): 3.5 lbs. (1.6 kg)
• Shipping Weight: 6 lbs. (2.3 kg)
• Agency Approvals: UL, CE, ENERGY STAR, RoHS/WEEE compliant, FCC Class B (Conducted and Radiated emissions), UL 2043 with PL-Kit