QSC SPA-Qf 60x4 – Four-Channel Q-SYS Network Amplifier with Flex I/O

Product Overview

The QSC SPA-Qf 60x4 is a four-channel Q-SYS network amplifier in a 1U half-rack chassis, delivering 60W per channel (120W bridged at 8Ω, 70V, or 100V) across four independently configurable output channels. It extends the SPA-Qf 60x2 to four zones while maintaining the same compact form factor, Flex I/O flexibility, and convection-cooled silent operation. Two software-definable Flex channels — each configurable as mic/line input (with 48V phantom power) or line output — add local signal I/O without a separate QIO expander. Four bi-directional GPIO pins support local control panel LED indicators, sensors, and mute triggers. The SPA-Qf 60x4 is the appropriate choice when four distributed speaker zones need to be driven from a single amplifier in a noise-sensitive space where fan noise is not acceptable.

Native Q-SYS integration means the SPA-Qf 60x4 appears as a managed device in Q-SYS Designer Software, with complete signal routing, gain, muting, metering, Flex channel configuration, and GPIO management from the Q-SYS Core processor. The universal PSU with PFC supports 100–240 VAC for global installation. Included rack and wall mount hardware supports rack, wall, furniture, or under-display installation configurations.

Key Features

• 4 amplifier channels at 60W/ch (8Ω and 4Ω); 120W bridged — Four independently driven zones from a single half-rack chassis; right-sized for small to medium room distributed audio without excessive power.
• Low-Z, 70V, and 100V bridged output support — 120W at 70V rms and 100V rms in bridged configuration for compatibility with distributed speaker lines.
• 2 software-definable Flex channels — Each independently configurable as mic/line input (48V phantom) or line output via Q-SYS Designer; no physical jumpers or DIP switches.
• 4 bi-directional GPIO pins + 3.3V power pin — Powers and reads LED panels, occupancy sensors, and mute switches at the amplifier location.
• 1U half-rack with multiple mounting options — Rack, wall, furniture, and under-display installation via included mounting kit.
• Convection cooling (fanless) — Silent operation for boardrooms, huddle rooms, and noise-sensitive commercial environments.
• Native Q-SYS integration — Full management from Q-SYS Core via Q-SYS Designer; no separate amplifier management interface.
• Universal PSU with PFC; 100–240 VAC — Global compliance, power factor correction.

Typical Applications

• Huddle room (multi-speaker)
• Small to medium conference room
• Commercial meeting space
• Breakout room
• Distributed zone fill (4-zone edge amplifier)
• Government space (small to medium)
• Training room (background music and paging)

Technical Specifications

Frequently Asked Questions

What is the difference between the SPA-Qf 60x2 and 60x4?
Both are half-rack, 1U, fanless Q-SYS network amplifiers at 60W/ch with identical Flex I/O, GPIO, and integration features. The 60x2 provides two output channels; the 60x4 provides four. Select the 60x4 when four independently driven speaker zones are needed from a single chassis. Both can coexist in the same Q-SYS design and are managed from the same Core processor.

Can the SPA-Qf 60x4 drive 70V ceiling speakers in bridged mode?
Yes. In bridged mode, the SPA-Qf 60x4 delivers 120W at 70V rms and 100V rms per bridged channel pair, making it compatible with standard 70V distributed speaker lines. Individual channels in single-ended mode operate at Lo-Z (2–16Ω) only; 70V/100V requires the bridged configuration.

Does the SPA-Qf 60x4 work with phantom power microphones on the Flex channels?
Yes. When either or both Flex channels are configured as mic/line inputs, 48V phantom power is available for condenser microphones. This allows a room microphone to be connected directly to the SPA-Qf 60x4 at the speaker location and routed into the Q-SYS network without a separate wall plate or QIO expander at that location.

What warranty applies?
QSC provides a 3-year limited warranty. Creation Networks provides pre-sales design support and post-sale technical assistance. Contact us at creationnetworks.net.