ISA Series

Professional Power Amplifiers

The ISA Installed System Amplifiers are designed to meet the needs of sound system designers and contractors worldwide. Three models feature isolated 25, 70, and 100 volt outputs for distributed sound systems, while four low impedance models are rated for 2 ohm operation. The ISA 1350 drives 70 volt lines directly with 1500 watts per channel. Versatile loading options and a comprehensive set of features make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.

ISA Power Amplifiers

 

 

Watts per channel

 

Model

70V*

8Ω**

4Ω**

2

ISA280

185

280

430

 

 

 

 

 

ISA450

260

425

700

 

 

 

 

 

ISA750

450

650

1200

 

 

 

 

 

ISA1350

1500††

800

1300

2000

ISA300Ti

300

185

280

430

 

 

 

 

 

ISA500Ti

500

260

425

700

 

 

 

 

 

ISA800Ti

800

450

650

1200

*50 Hz – 16 kHz, 0.5% THD

**20 Hz – 20 kHz, 0.1% THD †1 kHz, 1% THD

†† Direct Output, 70V, less than 0.5% THD, 20 - 20 kHz

THX is a trademark of THX Ltd.

ISA280 ISA450 ISA750 ISA1350 ISA300Ti ISA500Ti ISA800Ti

Features

Four models for low impedance applications

ISA1350 drives 70 volt lines directly with 1500 watts per channel

Three “Ti” versions include low impedance and isolated 25, 70, and 100 volt outputs for distributed audio systems

ISA450 and ISA750: THX™ approved for professional cinema applications

Rear panel gain controls for tamper resistant operation with 2 dB detents for quick and repeatable settings

XLR and detachable Euro style input connectors

DataPort V2 for use with DPV2 compatible signal processing accessories (XC-3, SF-3, LF-3) and DSP-3/DSP-4 (with external power supply)

Independent defeatable clip limiters for reduced distortion

Selectable high-pass filters protect speakers and prevent speaker transformer saturation with minimal effect on program material (30 Hz or 70 Hz on non-”Ti” models, 50 Hz or 75 Hz on “Ti” models)

Class H complementary bipolar output circuitry reduces AC power draw and waste heat by 40% on ISA750 and ISA800Ti, and by 50% on ISA1350

Front panel indicators include power, signal, and clip (and protect on ISA1350)

Covered barrier strip output connectors for safety agency compliance

Automatic variable-speed fan for quiet normal operation with maximum cooling on demand

Rear-to-front air flow keeps equipment racks cool

Stereo, bridge, or parallel operating modes

Comprehensive protection circuitry including DC, infrasonic, thermal overload, and short circuit protection

3 year warranty plus optional 3 year extended service contract

“Ti” Models

Isolated 25, 70, 100 volt, and low impedance outputs available simultaneously

Simple barrier strip connection determines output mode

“Ti” models have fully isolated 25, 70, and 100 volt outputs

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QSC Audio ISA300Ti, ISA450, ISA500Ti, ISA800Ti, ISA750, ISA280 warranty ISA Series, Professional Power Amplifiers, Ti Models

ISA1350, ISA280, ISA750, ISA800Ti, ISA500Ti specifications

QSC Audio, a reputable name in the professional audio industry, offers a diverse range of power amplifiers tailored for various applications. Among their most prominent products are the ISA450, ISA500Ti, ISA750, ISA280, and ISA1350 amplifiers. Each model features cutting-edge technologies and characteristics designed to deliver exceptional sound quality and reliability.

The ISA450 is a compact, lightweight power amplifier that stands out for its efficiency and flexibility. With a power output of 450 watts per channel at 4 ohms, it provides ample power for a variety of applications, including commercial spaces and live events. The ISA450 features an advanced cooling system, ensuring optimal performance even under heavy loads. Additionally, its versatility means it can be used in both 70V and 4 ohm configurations, making it suitable for a wide range of speaker systems.

Next in line is the ISA500Ti, known for its powerful performance and innovative technologies. It boasts a power output of 500 watts per channel, making it ideal for installations requiring robust audio playback. The ISA500Ti is equipped with DSP capabilities, enabling users to customize audio settings such as EQ, crossover, and delay adjustments. Furthermore, its efficient Class D amplification helps reduce power consumption while maintaining high audio fidelity.

The ISA750 amplifier offers even more robust capabilities, delivering 750 watts per channel at 4 ohms. Designed for larger venues, the ISA750 employs QSC’s renowned PowerWave technology to ensure consistent performance and thermal efficiency. This amplifier also features advanced protection circuitry, safeguarding against overload and short circuits, which helps enhance the system's longevity.

The ISA280 is engineered for compact installations where space is at a premium. Despite its smaller footprint, it provides a solid output of 280 watts per channel at 4 ohms. This model is perfect for background music or speech reinforcement in restaurants, stores, and corporate environments. The ISA280 includes features such as signal sensing power on/off, which streamlines installation and operation by eliminating the need for manual switching.

Lastly, the ISA1350 amplifier excels in spreading power across larger areas with up to 1350 watts per channel. It is particularly suitable for large auditoriums, stadiums, or outdoor events where high sound pressure levels are necessary. Like its counterparts, the ISA1350 employs advanced circuitry to optimize performance and reliability.

Overall, QSC's ISA series amplifiers, including the ISA450, ISA500Ti, ISA750, ISA280, and ISA1350, embody a perfect blend of power, efficiency, and versatility, catering to the demanding needs of professionals in the audio industry. Each model stands out for its unique features, making them suitable for a diverse range of applications. From small retail settings to expansive concert venues, QSC's ISA series continues to set the standard in professional audio solutions.