SPECIFICATIONSISA280ISA450ISA750ISA1350ISA300TiISA500TiISA800Ti

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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

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DIRECT POWER, STEREO MODE

70V 20 Hz-20 kHz +0/-0.3 dB 0.5% THD
–
–
–
1500W
–
–
–

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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

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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

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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
–

–
–
–
–

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)

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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