QSC ISA 280, Technical & Service Manual

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6 QSC Audio Products, LLC
TD-000163-00 Rev. B
l a c i p y T 1 l l u F 2 x a M 3
e l d I A 5 . 0
8
Ω Ω
Ω
Ω Ω
A 3 A 1 . 4 A 4 . 7
4
Ω Ω Ω Ω Ω
A 5 . 4 A 6 . 6 A 5 . 1 1
2
Ω Ω
Ω
Ω Ω
A 5 . 6 * A 5 . 9 * A 7 1
l a c i p y T 1 l l u F 2 x a M 3
e l d I A 5 . 0
8
Ω Ω
Ω
Ω Ω
A 7 . 3 A 4 . 5 A 0 1
4
Ω Ω Ω Ω Ω
A 6 A 6 . 9 A 6 1
2
Ω Ω
Ω
Ω Ω
A 3 . 9 * A 7 . 4 1 * A 5 2
l a c i p y T 1 l l u F 2 x a M 3
e l d I A 6 . 0
8
Ω Ω
Ω
Ω Ω
A 4 A 7 . 9 A 4 . 6 1
4
Ω Ω Ω Ω Ω
A 3 . 6 A 6 . 5 1 A 7 2
2
Ω Ω
Ω
Ω Ω
A 2 . 9 * A 3 2 * A 1 4
Typical 1 Full 2 Max 3
Idle 1.2 A
8
Ω
6.4 A 12.5 A 25.5 A
4
Ω
10 A 20 A 42 A
2
Ω
14.5 A 31 A* 66 A*
ISA Series Performance Specifications (continued)
ISA 280 & ISA 300Ti ISA 450 & ISA 500Ti ISA 750 & ISA 800Ti ISA 1350
INPUT IMPEDANCE 10 k
Ω
unbalanced
20 k
Ω
balanced
CONTROLS Front: AC switch, Ch. 1 and Ch. 2 gain
Rear: 10-position DIP switch
INDICATORS POWER: Green LED CLIP: Red LED, 1 per channel
SIGNAL: Yellow LED, 1 per channel
CONNECTORS Input: Active balanced; XLR (pin 2 +) and detachable Euro-style terminal blocks
Output: Screw terminals with safety shroud
DataPort V2: HD-15 female
COOLING Continuously variable speed fan, back-to-front air flow
AMPLIFIER PROTECTION Full short circuit, open circuit, thermal, ultrasonic, and RF protection
Stable into reactive or mismatched loads
LOAD PROTECTION Turn-on/turn-off muting, AC coupling, triac crowbar (on each channel)
OUTPUT CIRCUIT TYPE AB AB H (2-tier) H (3-tier)
AB: Class AB+B complementary linear output
H: Class AB+B complementary linear output with Class H 2- or 3-tier high efficiency circuit
DIMENSIONS 19.0" (48.3 cm) wide, 5.25" (13.3 cm) tall (3 rack spaces)
15.9" (40 cm) deep (rack mounting to rear support ears)
WEIGHT Shipping: ISA 280: 42 lb (19.1 kg) ISA 450: 46 lb (20.9 kg) ISA 750: 50.5 lb (23 kg) 68 lb (30.8 kg)
ISA 300Ti: 50 lb (22.7 kg) ISA 500Ti: 55 lb (25 kg) ISA 800Ti: 63 lb (28.6 kg)
Net: ISA 280: 35 lb (15.9 kg) ISA 450: 40 lb (18.2 kg) ISA 750: 44.5 lb (20.2 kg) 77 lb (34.4 kg)
ISA 300Ti: 44 lb (20 kg) ISA 500Ti: 49 lb (22.3 kg) ISA 800Ti: 57 lb (26 kg)
POWER REQUIREMENTS Available for 120 or 220–240 VAC, 50/60 Hz
POWER CONSUMPTION
@ 120 VAC
(both channels driven)
Multiply currents by 0.5 for 230V units
US patents pending
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE