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QSC ISA 500Ti 70V Dual Channel Amplifier

Brand:| Model: ISA 500TI
The ISA 500Ti by QSC is rated at 260 watts RMS per channel into 8 ohms, 425 into 4 ohms (20 Hz-20 kHz, 0.1% THD). 2 ohm load rating is 700 watts RMS per channel (1 kHz, 1% THD). Bridged mono output produces 900 watts RMS into 8 ohms, 1,400 into 4 ohms (1 kHz, 1% THD).
  • 25-, 70-, 100 volt, and low impedance outputs available simultaneously
  • Simple barrier strip connection determines output mode
  • Rear panel gain controls for tamper resistance
  • XLR and detachable Euro style input connectors
  • DataPort V2 for use with DPV2-compatible signal processing accessories
  • Independent defeatable clip limiters for reduced distortion
  • Selectable 30 Hz or 70 Hz high-pass filters protect
Part # 
Weight: 55 lbs.  
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Part # 245-697
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Product Details

QSC ISA 500Ti 70V Dual Channel Amplifier

Designed as a cost-effective solution specifically for sound contractors, the "Ti" versions with isolated 25, 70 and 100 volt outputs for distributed audio systems. Versatile loading options and a comprehensive feature set make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.

Unique among distributed sound power amplifiers, the "Ti" versions will drive 8 or 4 ohm loads and a distributed system on the same channel simultaneously. This enables a contractor to reduce the number of required amplifier channels by allowing a limited number of distributed speakers to be attached to the same amp as is powering the main sound system.

Housed in a rugged 3-U chassis, this model features 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.

Specifications: • Power output (stereo mode, both channels driven): 260 watts x 2 (8 ohms); 420 watts x 2 (4 ohms); 700 watts x 2 (2 ohms) • Power output (XF output power, stereo mode): 500 watts x 2 (70V), 300 watts x 2 (25V) • Power output (bridge mono mode): 900 watts x 1 (8 ohms); 1,400 watts x 1 (4 ohms) • Frequency response: Direct output -3 dB @ 50 Hz. 0.5 dB @ 20 kHz; XF output 50 Hz - 16 kHz, +1/-3 dB • Signal to noise (20 Hz - 20 kHz, 8 ohms): 100 dB • Distortion: <0.01% • Input sensitivity @ 8 ohms: 1.07V (+2.8 dBu) • Voltage gain @ 8 ohms: 44.7x (33 dB) • Output circuitry: Class AB • Dimensions: 19" rack mounting x 5.25" (3RU) H x 15.9" D (48.3 x 13.3 x 40 cm) • Weight: 49 lbs. (22.3 kg).

Product Specifications
  • Power Output (RMS @ 70V)> 400W
  • Weight Range50 to 59 lbs.
QSC ISA 500Ti 70V Dual Channel Amplifier
  • BrandQSC Audio
  • ModelISA 500TI
  • Part Number245-697
  • UPC684284045003
  • Product CategoryCommercial Contractor Power Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (2 Reviews)
  • Weight55 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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QSC ISA 300Ti 70V Dual Channel Amplifier
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QSC ISA 800Ti 70V Dual Channel Amplifier
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in the Commercial Contractor Power Amplifiers product category.


QSC ISA 500Ti 70V Dual Channel Amplifier
QSC ISA 500Ti 70V Dual Channel Amplifier is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from Best amp out there for commercial useWe have a 26 acre dirt and mud race track to cover with sound. I will not mention other amplifier manufacturers used... but they wouldn't last a single race. This QSC ROCKS! It plays music all day long and never shuts down due to heat.
Date published: 2011-02-17
Rated 5 out of 5 by from Loud, Clear, HeavyI have always put Carver at the top of the Amp stack. This QSC amp has shown to be a worthy competitor. It's capable driving alot of speakers with a respectable amount of power, and it does it cleanly. It just checks in on the scales 20 lbs heavier than my carvers.
Date published: 2011-04-08

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QSC ISA 500Ti 70V Dual Channel Amplifier

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