SPECIFICATIONS ISA280 ISA450 ISA750 ISA1350 ISA300Ti ISA500Ti ISA800Ti
  STEREO MODE, Both Channels Driven
8 ohms 20 Hz-20 kHz 0.1% THD 185W 260W 450W 800W 185W 260W 450W
4 ohms 20 Hz-20 kHz 0.1% THD 280W 425W 650W 1300W 280W 425W 650W
2 ohms 1 kHz 1% THD 430W 700W 1200W 2000W 430W 700W 1200W
  DIRECT POWER, STEREO MODE
70V 20 Hz-20 kHz +0/-0.3 dB 0.5% THD - - - 1500W - - -
  XF OUTPUT POWER, STEREO MODE
70V or 100V 50 Hz-16 kHz 0.5% THD - - - - 300W 500W 800W
25V 50 Hz-16 kHz 0.5% THD - - - - 200W 300W 500W
  BRIDGED MONO MODE
8 ohms 1 kHz 0.1% THD 600W 900W 1500W 2800W 600W 900W 1500W
4 ohms 1 kHz 1% THD 830W 1400W 2400W 4000W 830W 1400W 2400W
  XF OUTPUT POWER, BRIDGED MONO MODE
140V or 200V 50 Hz-16 kHz 0.5% THD - - - - 600W 1000W 1600W
Signal to Noise (20 Hz-20 kHz) 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB 100 dB
Distortion (SMPTE-IM) Less than 0.01% Less than 0.01% Less than 0.02% Less than 0.01% Less than 0.01% Less than 0.01% Less than 0.02%
Input Sensitivity @ 8 ohms 1.15v
(+3.4 dBu)		 1.07v
(+2.8 dBu)		 1.07v
(+2.8 dBu)		 1.24v
(+4.1 dBu)		 1.15v
(+3.4 dBu)		 1.07v
(+2.8 dBu)		 1.07v
(+2.8 dBu)
Voltage Gain @ 8 ohms

 		 33.4x
(30.5 dB)		 44.7x
(33 dB)		 56.2x
(35 dB)		 64.0x
(36.1 dB)		 33.4x
(30.5 dB)		 44.7x
(33 dB)		 56.2x
(35 dB)
Output Circuitry Class AB Class AB Class H Class H, 3 Tier Class AB Class AB Class H
THX Approved - THX Approved THX Approved - - - -
Weight - Net

 		 36 lbs
(16.3 kg)		 42 lbs
(19 kg)		 47 lbs
(21.3 kg)		 68 lbs
(30.8 kg)		 44 lbs
(20.0 kg)		 49 lbs
(22.3 kg)		 57 lbs
(26 kg)
Weight - Shipping

 		 42 lbs
(19.1 kg)		 48 lbs
(22 kg)		 53 lbs
(24.0 kg)		 77 lbs
(34.4 kg)		 50 lbs
(22.7 kg)		 55 lbs
(25 kg)		 63 lbs
(28.6 kg)
  ALL MODELS
Distortion (Typical)
  20 Hz-20 kHz: 10 dB below rated power
  1.0 kHz and below: full rated power		 Less than 0.03% THD, 4 ohms and 8 ohms

Less than 0.03% THD, 4 ohms and 8 ohms
Frequency Response
10 dB below rated output power

 		 ISA 280, 450, 750 and 1350:
20 Hz-20 kHz, +0/-1 dB; -3 dB points: 5 Hz and 50 kHz
 		 ISA 300Ti, 500Ti and 800Ti:
Direct outputs: -3 dB @ 50 Hz, -0.5 dB @ 20 kHz; XF outputs: 50 Hz-16 kHz, +1/-3 dB
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; Triac crowbar: ISA 750, 1350 and 800Ti; AC coupling: ISA 280, 300Ti, 450 and 500Ti

All Specification Subject to Change Without Notice.