QSC Audio ISA280 Fascicule

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

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**

2Ω

†

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

Professional Power Amplifiers

ISA280 | ISA450 | ISA750 | ISA1350 | ISA300Ti | ISA500Ti | ISA800Ti