QSC ISA450 2-Channel Power Amplifier

The QSC ISA450 is a two-channel power amplifier engineered for permanently installed sound systems in houses of worship, retail spaces, schools, and commercial venues. Part of QSC's ISA (Installed Sound Amplifier) series, it delivers dependable, clean amplification with the build quality that has made QSC a fixture in professional installations for decades.

The ISA450 produces 260 watts per channel into 8 ohms (425 watts into 4 ohms) in stereo, and can be bridged to mono for higher-power applications. Direct constant-voltage (70V) distributed system output is supported in bridged mode, making the amplifier equally at home driving conventional low-impedance loudspeakers or distributed paging and background-music systems. Balanced Euroblock and XLR inputs, detented gain controls, and a selectable high-pass filter simplify integration, while QSC's proven output protection guards against shorts, thermal overload, and RF interference.

A front-panel-to-rear airflow design with a variable-speed fan keeps the two-rack-space chassis cool in equipment racks, and the ISA450's reliability record makes it a trusted replacement or expansion amplifier for existing QSC-based installations.

Features

• 2-channel installed-sound power amplifier, bridgeable to mono
• 260W per channel @ 8 ohms; 425W per channel @ 4 ohms; 900W bridged @ 8 ohms
• 70V distributed-system capability in bridge mode
• Balanced XLR and Euroblock inputs with detented gain controls
• Comprehensive protection: short circuit, thermal, RF, DC fault
• 2RU chassis with variable-speed fan cooling

Technical Specifications

• Model: ISA450
• Channels: 2 (bridgeable)
• Power: 260W/ch @ 8 ohms, 425W/ch @ 4 ohms
• Inputs: XLR and Euroblock, balanced
• Rack size: 2RU
• UPC: 684284003911