QSC ISA
Features:
- Three
models for low-impedance applications
- 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 (with external power supply)
- Independent
defeatable clip limiters for reduced distortion
- Selectable
high-pass filters that protect speakers and prevent speaker
transformer saturation with minimal effect on program material (30 Hz
or 70 Hz on non-T models, 50 Hz or 75 Hz on T models)
- Class
H complementary bipolar output circuitry reduces AC power draw and
waste heat by 40% (ISA 750 and 800T)
- 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
- 3-year
warranty plus optional 3-year extended service contract
|
ISA
SPECIFICATIONS
|
ISA280 |
ISA450 |
ISA750 |
STEREO
MODE
Both Channels Driven |
Continuous
Average Output Power Per Channel |
| 8
ohms 20 Hz-20 kHz 0.1% THD |
185W |
260W |
450W |
| 4
ohms 20 Hz-20 kHz 0.1% THD |
280W |
425W |
650W |
| 2
ohms 1 kHz 1% THD |
430W |
700W |
1200W |
| XF
OUTPUT POWER, STEREO MODE |
| 70V
or 100V 50 Hz-16 kHz 0.5% THD |
- |
- |
- |
| 25V
50 Hz-16 kHz 0.5% THD |
- |
- |
- |
| BRIDGE
MONO MODE |
Continuous
Average Output Power |
| 8
ohms 1 kHz 0.1% THD |
600W |
900W |
1500W |
| 4
ohms 1 kHz 1% THD |
830W |
1400W |
2400W |
| XF
OUTPUT POWER, BRIDGE MONO MODE |
| 140V
or 200V 50 Hz-16 kHz 0.5% THD |
- |
- |
- |
| 50V
50 Hz-16 kHz 0.5% THD |
- |
- |
- |
| Signal
to Noise (20 Hz-20 kHz) |
100
dB |
100
dB |
100
dB |
| Distortion
(SMPTE-IM) |
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) |
| Voltage
Gain @ 8 ohms |
33.4x
(30.5 dB) |
44.7x
(33 dB) |
56.2x
(35 dB) |
| Output
Circuitry |
Class
AB |
Class
AB |
Class
H |
| Weight
- Net |
36
lbs (16.3 kg) |
36
lbs (16.3 kg) |
47
lbs (21.3 kg) |
| Weight
- Shipping |
42
lbs (19.1 kg) |
42
lbs (19.1 kg) |
53
lbs (24.0 kg) |
|
| ALL
MODELS |
| Distortion
(Typical) |
|
|
20 Hz-20 kHz: 10 dB below rated power |
Less
than 0.03% THD, 4 ohms and 8 ohms |
|
1.0 kHz and below: full rated power |
Less
than 0.03% THD, 4 ohms and 8 ohms |
Frequency
Response
10 dB below rated output power |
ISA
280, 450, and 750: 20 Hz20 kHz, +0/-1 dB; -3 dB points: 5 Hz and
50 kHz |
| Damping
Factor |
Greater
than 200 at 8 ohms |
| Input
Impedance |
10
k ohms unbalanced, 20 k ohms balanced |
| Input
Clipping |
10
Vrms (+22 dB) |
| 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 |
PWR-ON:
Green LED SIGNAL: Green LED (1 per channel) |
| |
CLIP:
Red LED (1 per channel) |
| Amplifier
Protection |
Full
short circuit, open circuit, thermal, ultrasonic, and RF protection; |
| |
Stable
into reactive or mismatched loads |
| Load
Protection |
On/off
muting; Triac crowbar: ISA 750 and 800T; AC coupling: ISA 280, 300T,
450 and 500T |
| Dimensions |
19
(48.3 cm) rack mounting, 5.25(13.3cm) tall (3 rack spaces), |
| |
15.9
(40 cm) deep (from front mounting rails) |
| Power
Requirements |
100,
120, 230, VAC, 50-60 Hz |
|
|
All
specifications subject to change.
|
|
|
