QSC ISA300Ti  เครื่องขยายเสียง 2 channels, 185 watts/ch at 8, 280 watts/ch at 4, 430 watts/ch at 2, 300 watts/ch at 70V

 

Features

• Low-impedance outputs plus isolated 25, 70, and 100 volt outputs for distributed audio systems

• Rear panel gain controls for tamper resistance; 2-dB detents allow 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/DSP-4 (with external power supply)

• Independent defeatable clip limiters for reduced distortion

• Selectable high-pass filters (50 Hz or 75 Hz) protect speakers and prevent speaker transformer saturation, with minimal effect on program material

• Front panel indicators include power, signal, and clip

• Covered barrier strip output connectors for safety agency compliance

• Automatic on-demand variable-speed fan: quiet normal operation, with maximum cooling when needed

• Rear-to-front air flow helps keep 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

SPECIFICATIONSISA280ISA450ISA750ISA1350ISA300TiISA500TiISA800Ti

 OUTPUT POWER PER CHANNEL, STEREO MODE, both channels driven

8Ω, 20 Hz–20 kHz 0.1% THD
4Ω, 20 Hz–20 kHz 0.1% THD
2Ω 1 kHz 1% THD185 W
280 W
430 W260 W
425 W
700 W450 W
650 W
1200 W800 W
1300 W
2000 W185 W
280 W
430 W260 W
425 W
700 W450 W
650 W
1200 W

 DIRECT POWER PER CHANNEL, STEREO MODE

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

 TRANSFORMER-ISOLATED OUTPUT POWER PER CHANNEL, STEREO MODE

70V or 100V, 50 Hz–16 kHz 0.5% THD
25V, 50 Hz–16 kHz 0.5% THD-
--
--
--
-300 W
200 W500 W
300 W800 W
500 W

 OUTPUT POWER, BRIDGED MONO MODE

8Ω, 1 kHz 0.1% THD
4Ω 1 kHz 1% THD600 W
830 W900 W
1400 W1500 W
2400 W2800 W
4000 W600 W
830 W900 W
1400 W1500 W
2400 W

 TRANSFORMER-ISOLATED OUTPUT POWER, BRIDGED MONO MODE

140V or 200V, 50 Hz-16 kHz 0.5% THD----600 W1000 W1600 W

Signal to Noise (20 Hz-20 kHz)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 ohms1.15 V
(+3.4 dBu)1.07 V
(+2.8 dBu)1.07 V
(+2.8 dBu)1.24 V
(+4.1 dBu)1.15 V
(+3.4 dBu)1.07 V
(+2.8 dBu)1.07 V
(+2.8 dBu)

Maximum Voltage Gain33.4×
(30.5 dB)44.7×
(33 dB)56.2×
(35 dB)64.0×
(36.1 dB)33.4×
(30.5 dB)44.7×
(33 dB)56.2×
(35 dB)

Output CircuitryClass ABClass ABClass H, 2 tierClass H, 3 tierClass ABClass ABClass H, 2 tier

THX Approved-YesYes----

Weight - Net36 lb
(16.3 kg)42 lb
(19 kg)47 lb
(21.3 kg)68 lb
(30.8 kg)44 lb
(20.0 kg)49 lb
(22.3 kg)57 lb
(26 kg)

Weight - Shipping42 lb
(19.1 kg)48 lb
(22 kg)53 lb
(24.0 kg)77 lb
(34.4 kg)50 lb
(22.7 kg)55 lb
(25 kg)63 lb
(28.6 kg)

 ALL MODELS

Distortion (Typical)
20 Hz–20 kHz: 10 dB below rated power
1.0 kHz and below: full rated powerLess 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 powerISA 280, 450, 750 and 1350: 
20 Hz–20 kHz, +0/-1 dB; -3 dB points: 5 Hz and 50 kHzISA 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 with 8Ω Load (direct outputs)Greater than 200; ISA 1350 greater than 250

Output Regulation (isolated outputs)Less than 1.5 dB

Input Impedance10 kΩ unbalanced, 20 kΩ balanced

Input Clipping10 V rms (+22 dBu)

CoolingContinuously variable speed fan, back-to-front air flow

Connectors, each channelInput: Active balanced; 3-pin Euro-style detachable terminal block and XLR (pin 2+)
Output: Covered barrier strips 
DataPort V2: HD-15 connector

ControlsFront: AC switch
Rear: Ch. 1 and Ch. 2 gain knobs, 10-position DIP switch

IndicatorsPWR-ON: Green LED; SIGNAL: Green LED (1 per channel);
CLIP: Red LED (1 per channel)

Dimensions (HWD) inches5.25 x 19 x 15.9 / 3RU

Dimensions (HWD) mm133 x 483 x 400 / 3RU

Amplifier ProtectionFull short circuit, open circuit, thermal, ultrasonic, and RF protection;
Stable into reactive or mismatched loads

Power Requirements120 or 230 VAC, 50–60 Hz

Load ProtectionOn/off muting; Triac crowbar: ISA 750, 1350, and 800Ti; AC coupling: ISA 280, 300Ti, 450, and 500Ti