QSC Audio Products, LLC. ISA Series 830W Installation Amplifier ISA 280

Designed as a cost-effective solution specifically for sound contractors, the ISA Series features versatile loading options and a comprehensive feature make it a rugged power solution for any permanently installed sound system.
Housed in a rugged 3-U chassis, all ISA models feature rear panel gain controls for tamper resistant operation with 2 dB detents for quick and repeatable settings. Inputs include both XLR and detachable Euro-style connectors. Outputs feature covered barrier strip connectors for safety agency compliance, and for added versatility, a DataPort V2 (Version 2) terminated with an HD-15 connector is provided for use with DPV2-compatible signal processing accessories such as the XC-3 Crossover, SF-3 Subwoofer Filter, LF-3 Low Frequency Filter and the DSP-3 with external power supply.
Selectable high-pass filters are included to protect speakers and prevent speaker transformer saturation with minimal effect on program material. The ISA Series provide additional protection circuitry including DC, infrasonic, thermal overload, RF and short circuit protection.
Damping Factor (direct outputs): Greater than 200 at 8 ohms, ISA 1350 greater than 250
Output Regulation (isolated outputs): Less than 1.5 dB
Input Impedance: 10 k ohms unbalanced, 20 k ohms balanced
Input Clipping: 10 Vrms (+22 dBu)
Cooling: Continuously variable speed fan, back-to-front air flow
Connectors, each channel
Input: Active balanced; 3-pin Euro-style detachable terminal block and XLR (pin 2+)
Output: Covered barrier strips
DataPort V2: HD-15 connector
Controls
Front: AC switch
Rear: Ch. 1 and Ch. 2 gain knobs, 10-position DIP switch
Indicators
PWR-ON: Green LED; SIGNAL: Green LED (1 per channel);
CLIP: Red LED (1 per channel)
Dimensions
19" (48.3 cm) rack mounting, 5.25"(13.3cm) tall (3 rack spaces),
15.9" (40 cm) deep (from front mounting rails)
Amplifier Protection: Full short circuit, open circuit, thermal, ultrasonic, and RF protection;
Stable into reactive or mismatched loads
Power Requirements: 120, 230, VAC, 50-60 Hz
Load Protection: On/off muting