QSC ISA300Ti
Installation Power Amplifier with 25V, 70V, 100V and Low Impedance Outputs

OUR PART #  ISA300TI


The QSC ISA300Ti is a power amplifier that features 25V, 70V, 100V and low impedance outputs and is designed for installation-based distributed audio systems. The ISA300Ti drives 70 volt lines directly with 300 Watts per channel.

Versatile loading options and a comprehensive set of features make the ISA300Ti a rugged, cost-effective power solution for any permanently installed sound system.

QSC ISA300Ti Features:

  • Includes low impedance and isolated 25, 70 and 100 volt outputs for distributed audio systems
  • 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 (50 Hz or 75 Hz)
  • Front panel indicators include power, signal and clip
  • 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
  • Fully isolated 25, 70, 100 volt and low impedance outputs available simultaneously
  • Simple barrier strip connection determines output mode

QSC ISA300Ti Specifications:

  • Power Ratings:
    • Stereo Mode (both channels driven):
      • 8 Ohms, 20 Hz - 20 kHz, 0.1% THD: 185 Watts
      • 4 Ohms, 20 Hz - 20 kHz, 0.1% THD: 280 Watts
      • 2 Ohms, 1 kHz, 1% THD: 430 Watts
    • XF Output Power, Stereo Mode:
      • 70V or 100V, 50 Hz - 16 kHz, 0.5% THD: 300 Watts
      • 25V, 50 Hz - 16 kHz, 0.5% THD: 200 Watts
    • Bridge Mono Mode:
      • 8 Ohms, 1 kHz, 0.1% THD: 600 Watts
      • 4 Ohms, 1 kHz, 1% THD: 830 Watts
    • XF Output Power, Bridge Mono Mode 140V or 200V, 50 Hz - 16 kHz, 0.5% THD: 600 Watts
  • Signal-to-Noise Ratio: 100 dB
  • Distortion (SMPTE-IM): < 0.01%
  • Input Sensitivity at 8 Ohms: 1.15V (+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 Ohms and 8 Ohms
    • 1.0 kHz and below, full rated power: < 0.03% THD, 4 Ohms and 8 Ohms
  • 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): < 1.5dB
  • Input Impedance: 10 kOhms unbalanced, 20 kOhms 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-15connector
  • Controls:
    • Front: AC Switch
    • Rear: Ch 1 & 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 (HxWxD): 5.25" (3RU) x 19" x 15.9" (13.3cm x 48.3cm x 40cm)
  • Weight: 44 lbs (20.0 kg)
  • Power Requirements: 100, 120, 230 VAC, 50 - 60 Hz
Crossover Module/CX1102
QSC XC-3 Crossover Module/CX1102
The XC-3 is an active two-way crossover for use with bi-amplified loudspeakers. The unit mounts to the rear panel of a two-channel DCA, CX, or ISA amplifiers to save cost and rack space. The amplifier's DataPort provides the accessory's ...

Usually ships in 7-14 business days.
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Remote Rack Mounting Bracket for DSP-3 & DSP-4
QSC DPX4 Remote Rack Mounting Bracket for DSP-3 & DSP-4
The DPX-4 allows remote rack mounting of QSC DataPort-compatible accessory modules such as the DSP-3 and DSP-4 digital signal processors. The bracket allows accessory modules to be used in a standalone configuration with QSC four-channel, ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Power Supply for DSP3
QSC DPX1 Power Supply for DSP3
This external power supply is used for the DSP-3 Digital Signal Processor under special circumstances.When a DSP-3 is mounted out-board with a DPX-4 Rack Mount Bracket, or directly on an amplifier where external voltage is necessary, this ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

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QSC ISA300Ti
Installation Power Amplifier with 25V, 70V, 100V and Low Impedance Outputs

OUR PART #  ISA300TI

Product Information:

The QSC ISA300Ti is a power amplifier that features 25V, 70V, 100V and low impedance outputs and is designed for installation-based distributed audio systems. The ISA300Ti drives 70 volt lines directly with 300 Watts per channel.

Versatile loading options and a comprehensive set of features make the ISA300Ti a rugged, cost-effective power solution for any permanently installed sound system.

QSC ISA300Ti Features:

  • Includes low impedance and isolated 25, 70 and 100 volt outputs for distributed audio systems
  • 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 (50 Hz or 75 Hz)
  • Front panel indicators include power, signal and clip
  • 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
  • Fully isolated 25, 70, 100 volt and low impedance outputs available simultaneously
  • Simple barrier strip connection determines output mode

QSC ISA300Ti Specifications:

  • Power Ratings:
    • Stereo Mode (both channels driven):
      • 8 Ohms, 20 Hz - 20 kHz, 0.1% THD: 185 Watts
      • 4 Ohms, 20 Hz - 20 kHz, 0.1% THD: 280 Watts
      • 2 Ohms, 1 kHz, 1% THD: 430 Watts
    • XF Output Power, Stereo Mode:
      • 70V or 100V, 50 Hz - 16 kHz, 0.5% THD: 300 Watts
      • 25V, 50 Hz - 16 kHz, 0.5% THD: 200 Watts
    • Bridge Mono Mode:
      • 8 Ohms, 1 kHz, 0.1% THD: 600 Watts
      • 4 Ohms, 1 kHz, 1% THD: 830 Watts
    • XF Output Power, Bridge Mono Mode 140V or 200V, 50 Hz - 16 kHz, 0.5% THD: 600 Watts
  • Signal-to-Noise Ratio: 100 dB
  • Distortion (SMPTE-IM): < 0.01%
  • Input Sensitivity at 8 Ohms: 1.15V (+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 Ohms and 8 Ohms
    • 1.0 kHz and below, full rated power: < 0.03% THD, 4 Ohms and 8 Ohms
  • 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): < 1.5dB
  • Input Impedance: 10 kOhms unbalanced, 20 kOhms 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-15connector
  • Controls:
    • Front: AC Switch
    • Rear: Ch 1 & 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 (HxWxD): 5.25" (3RU) x 19" x 15.9" (13.3cm x 48.3cm x 40cm)
  • Weight: 44 lbs (20.0 kg)
  • Power Requirements: 100, 120, 230 VAC, 50 - 60 Hz
Crossover Module/CX1102
QSC XC-3 Crossover Module/CX1102
The XC-3 is an active two-way crossover for use with bi-amplified loudspeakers. The unit mounts to the rear panel of a two-channel DCA, CX, or ISA amplifiers to save cost and rack space. The amplifier's DataPort provides the accessory's ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Remote Rack Mounting Bracket for DSP-3 & DSP-4
QSC DPX4 Remote Rack Mounting Bracket for DSP-3 & DSP-4
The DPX-4 allows remote rack mounting of QSC DataPort-compatible accessory modules such as the DSP-3 and DSP-4 digital signal processors. The bracket allows accessory modules to be used in a standalone configuration with QSC four-channel, ...

Usually ships in 7-14 business days.
Need it sooner? Call us!
Power Supply for DSP3
QSC DPX1 Power Supply for DSP3
This external power supply is used for the DSP-3 Digital Signal Processor under special circumstances.When a DSP-3 is mounted out-board with a DPX-4 Rack Mount Bracket, or directly on an amplifier where external voltage is necessary, this ...

Usually ships in 7-14 business days.
Need it sooner? Call us!

Click to download

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