This QSC ISA280 2 Channel Power Amplifier includes a selectable high-pass filters 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. Selectable high-pass filters are included to protect speakers and prevent speaker transformer saturation with minimal effect on program material. Versatile loading options and a comprehensive feature set make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.
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.
| Stereo Mode Both Channels Driven | |
|---|---|
| 8 Ohms | |
| 20 Hz-20 kHz 0.1% THD | 185W |
| 4 Ohms | |
| 20 Hz-20 kHz 0.1% THD | 280W |
| 2 Ohms | |
| 1 kHz 1% THD | 430W |
| Bridged Mono Mode | |
| 8 Ohms | |
| 1 kHz 0.1% THD | 600W |
| 4 Ohms | |
| 1 kHz 1% THD | 830W |
| Signal to Noise (20 Hz-20 kHz) | 100 dB |
| Distortion (SMPTE-IM) | Less than 0.01% |
| Input Sensitivity @ 8 ohms | 1.15v(+3.4 dBu) |
| Voltage Gain @ 8 ohms | 33.4x(30.5 dB) |
| Output Circuitry | Class AB |
| Distortion (Typical) | |
| 20 Hz-20 kHz: 10 dB below rated power | Less than 0.03% THD, 4 ohms and 8 ohms |
| 1.0 kHz and below: full rated power | Less than 0.03% THD, 4 ohms and 8 ohms |
| Frequency Response | 20 Hz-20 kHz, +0/-1 dB; -3 dB points: 5 Hz and 50 kHz |
| Damping Factor (direct outputs) | Greater than 200 at 8 ohms, ISA 1350 greater than 250 |
| 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 |
| Amplifier Protection | Full short circuit, open circuit, thermal, ultrasonic, and RF protection |
| Power Requirements | 120, 230, VAC, 50-60 Hz |
| Dimensions (H x W x D) | 5.25" (133 mm) x 19" (483 mm) x 15.9" (404 mm) |
| Net Weight | 36 lbs (16.3 kg) |
| Shipping Weight | 42 lbs (19.1 kg) |
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
Usually arrives in 5-9 business days.
