ISA300Ti

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

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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

SPECIFICATIONS	ISA280	ISA450	ISA750	ISA1350	ISA300Ti	ISA500Ti	ISA800Ti
	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% THD	185 W 280 W 430 W	260 W 425 W 700 W	450 W 650 W 1200 W	800 W 1300 W 2000 W	185 W 280 W 430 W	260 W 425 W 700 W	450 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 W	500 W 300 W	800 W 500 W
	OUTPUT POWER, BRIDGED MONO MODE
8Ω, 1 kHz 0.1% THD 4Ω 1 kHz 1% THD	600 W 830 W	900 W 1400 W	1500 W 2400 W	2800 W 4000 W	600 W 830 W	900 W 1400 W	1500 W 2400 W
	TRANSFORMER-ISOLATED OUTPUT POWER, BRIDGED MONO MODE
140V or 200V, 50 Hz-16 kHz 0.5% THD	–	–	–	–	600 W	1000 W	1600 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 ohms	1.15 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 Gain	33.4× (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 Circuitry	Class AB	Class AB	Class H, 2 tier	Class H, 3 tier	Class AB	Class AB	Class H, 2 tier
THX Approved	–	Yes	Yes	–	–	–	–
Weight – Net	36 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 – Shipping	42 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 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 with 8Ω Load (direct outputs)	Greater than 200; ISA 1350 greater than 250
Output Regulation (isolated outputs)	Less than 1.5 dB
Input Impedance	10 kΩ unbalanced, 20 kΩ balanced
Input Clipping	10 V rms (+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 (HWD) inches	5.25 x 19 x 15.9 / 3RU
Dimensions (HWD) mm	133 x 483 x 400 / 3RU
Amplifier Protection	Full short circuit, open circuit, thermal, ultrasonic, and RF protection; Stable into reactive or mismatched loads
Power Requirements	120 or 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