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QSC SPA4-100 – 4-Channel Power Amplifier, 100W per Channel
QSC SPA4-100 – 4-Channel Power Amplifier, 100W per Channel - Image 2
QSC SPA4-100 – 4-Channel Power Amplifier, 100W per Channel - Image 3
QSC SPA4-100 – 4-Channel Power Amplifier, 100W per Channel - Image 4
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QSC SPA4-100 – 4-Channel Power Amplifier, 100W per Channel

1/2 RU 4 Channel ENERGY STAR amplifier / Multichannel Operation 100 watts into 8 Ω & 4 Ω, Bridged pair operation 200 watts into 8Ω & 4Ω, and 350 watts into 70v and 100v / 100-240 VAC Operation .

The QSC SPA4-100 is a high-efficiency 4-channel power amplifier, delivering 100 watts per channel at 4 ohms in a compact and versatile design. Designed for background music, paging, and small-to-medium sized audio installations, it combines powerful Class-D amplification with energy-saving features to meet the demands of modern AV environments.

With its half-rack chassis and fanless operation, the SPA4-100 is ideal for conference rooms, retail stores, education facilities, and hospitality settings. It supports both low-impedance (4/8Ω) and high-impedance (70V/100V) distributed systems, making it flexible for various applications. It can also be bridged for higher output power, allowing up to 200W in bridged mode.

The auto-standby mode helps reduce power consumption, making it an energy-efficient choice. QSC’s reliable build quality and flexible mounting options (tabletop, rack, or wall-mount) ensure long-term performance and easy installation in tight spaces.

Specifications

Feature Details
Model QSC SPA4-100
Amplifier Type Class-D, 4-channel power amplifier
Power Output 4x 100W @ 4Ω or 8Ω
Bridged Output 2x 200W in bridged mode
High-Z Compatibility 70V and 100V operation supported
Input Types Balanced Euroblock connectors
Output Types Euroblock speaker outputs
Cooling System Fanless, convection cooled
Standby Mode Auto-standby with low power draw
Mounting Options Half-rack chassis, rack-mount kit optional
Dimensions Approx. 1 RU height, half-rack width
Applications Commercial AV, paging, BGM, education, retail

Features

  • 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 — Bridging the outputs of the SPA4-100 will deliver up to 175 watts per channel pair 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

What’s in the Box ?

  • 1 × QSC SPA4‑100 amplifier unit

  • 1 × IEC power cable

  • Connector pack (Euroblock accessories for input/output)

  • Rack-mount ears and mounting brackets

  • Quick Start Guide & Warranty documentation

Additional Resources

User-Manual :

Download

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