The QSC SPA4-100 is a compact, ENERGY STAR®-qualified 4-channel amplifier designed for versatile audio applications in commercial environments. Delivering 100 watts RMS per channel into 4Ω or 8Ω loads, it offers bridgeable outputs that can provide up to 200 watts per channel pair into low-impedance systems and up to 175 watts into 70V or 100V high-impedance systems. The amplifier features an efficient Class-D design with convection cooling, ensuring quiet operation and reduced energy consumption. Its Auto-Ramp circuitry allows for silent power-up and power-down transitions, conserving energy by entering standby mode after periods of inactivity. Housed in a 1U, half-rack width enclosure, the SPA4-100 includes mounting brackets for flexible installation options, such as under-table or wall mounting. With a frequency response of 20 Hz to 20 kHz, a signal-to-noise ratio greater than 100 dB, and comprehensive protection features—including RMS and thermal limiting, as well as safeguards against overcurrent, short circuit, and voltage irregularities—the SPA4-100 is engineered for reliable performance in various professional audio setups.
• Up to 200 watts per channel into 4 and 8 ohms — the outputs of the SPA4-100 model are designed to provide up to 100 watts per channel into Low-Z loads.
• ENERGY STAR® qualified amplifier - The ENERGY STAR qualified SPA amplifiers employ an efficient class-D design to conserve energy and reduce operational cost.
• Bridgeable outputs for higher power — Bridgeable outputs for higher power - Bridging the outputs of the SPA4-100 will deliver up to 350 watts into 70V or 100V when bridged.
• Auto-Ramp provides quiet startup and power-down — The ENERGY STAR auto-ramp circuitry ensures quiet and fast power up from standby and seamless power-down following 25 minutes of inactivity, dramatically reducing power consumption.
• Rack-mountable 1U, half rack width enclosure — The SPA amplifers can be mounted in 1 RU, 1/2 rack space, and their clever joining brackets enable easy under-table and wall-mounting
• Stereo Mode Watts Per Channel:
• 8 Ohms Dynamic, Both Channels Driven: 100 W
• 4 Ohms Dynamic, Both channels Driven: 100 W
• Bridged Mode, Watts per Channel:
• 8 Ohms & 4 Ohms: 200 W
• 70V & 100V: 350 W
• Signal to Noise (A-weighted, 20 Hz-20 kHz): >100 dB
• Input Sensitivity: 1.23 Vrms (+4 dBu)
• Maximum Voltage Gain: 25 dB
• Output Circuitry: Class D
• Input Impedance: >10 kO (balanced), >10 kO (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: 4 Ohms/8 Ohms/70V Bridge Highpass On/100V Bridged Highpass On per channel pair
• Dimensions (H x W x D): 1.7" x 8.7" x 9.5"
• Weight: 4.0 lb
• Agency Approvals: UL, CE, ENERGY STAR, RoHS/WEEE compliant, FCC Class B (Conducted and Radiated emissions), UL 2043 witd PL-Kit
(1) QSC SPA4-100 Power Amplifier
(1) Power Cable
(1) Quick Start Guide
(1) Connector Kit
(1) Rack Mount Ears
(1) Mounting Brackets
