Product Overview
The QSC ISA300Ti is a power amplifier that features 25 V, 70 V, 100 V and low-impedance outputs and is designed for installation-based distributed audio systems. The unit drives 70 V lines directly with 300 W per channel. Versatile loading options and a comprehensive set of features make it a rugged, cost-effective power solution for any permanently installed sound system.
Features
- 300 W stereo for 70 V/100 V systems, 185 W @ 8 Ω
- 3U chassis with rear-mounted gain controls
- Independent, defeatable clip limiters reduce distortion
- Selectable high-pass filters protect against transformer saturation and driver overexcursion
- Includes extensive DC, infrasonic, thermal overload, and short circuit protection
Specifications
- Power Ratings:
- Stereo Mode (both channels driven):
- 8 Ω, 20 Hz - 20 kHz, 0.1% THD: 185 Watts
- 4 Ω, 20 Hz - 20 kHz, 0.1% THD: 280 Watts
- 2 Ω, 1 kHz, 1% THD: 430 Watts
- XF Output Power, Stereo Mode:
- 70 V or 100 V, 50 Hz - 16 kHz, 0.5% THD: 300 Watts
- 25 V, 50 Hz - 16 kHz, 0.5% THD: 200 Watts
- Bridge Mono Mode:
- 8 Ω, 1 kHz, 0.1% THD: 600 Watts
- 4 Ω, 1 kHz, 1% THD: 830 Watts
- XF Output Power, Bridge Mono Mode 140 V or 200 V, 50 Hz - 16 kHz, 0.5% THD: 600 Watts
- Signal-to-Noise Ratio: 100 dB
- Distortion (SMPTE-IM): < 0.01%
- Input Sensitivity at 8 Ω: 1.15 V (+3.4 dBU)
- Gain at 8 Ohms: 33.4x (30.5 dB)
- Output Circuitry: AB
- Distortion (typical):
- 20 Hz - 20 kHz, 10 dB below rated power: < 0.03% THD, 4 Ω and 8 Ω
- 1.0 kHz and below, full rated power: < 0.03% THD, 4 Ω and 8 Ω
- Frequency Response (10 dB below rated output power): -3 dB at 50 Hz, -0.5 dB at 20 kHz; XF Outputs: 50 Hz - 16 kHz, +0/-3 dB
- Output Regulation (isolated outputs): < 1.5 dB
- Input Impedance: 10 kΩ unbalanced, 20 kΩ balanced
- Input Clipping: 10 Vrms (+22 dBu)
- Cooling: Continuously variable speed fan,back-to-front air flow
- Connectors:
- 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:
- Power On: Green LED
- Signal: Green LED (1 per channel)
- Clip: Red LED (1 per channel)
- Load Protection: On/Off muting
- Dimensions (H x W x D): 5.25" (3U) x 19" x 15.9" (13.3 x 48.3 x 40cm)
- Weight: 44 lbs. (20.0 kg)
- Power Requirements: 100, 120, 230 VAC, 50 - 60 Hz