The ISP Technologies LT1 speakers are a 3-way active speaker system with high output and low distortion. The LT1 speakers are designed to be flown from the ceiling in a permanent installation. They can be used by themselves or with subwoofers. The 3-way design with an 8’’ midrange which is phase-aligned with the high frequency driver allows for wider, cleaner, more detailed midrange coverage than 2-way designs. It also results in better low-frequency response since the woofer can be optimized for LF performance, and off-loading the midrange duties results in lower power compression. The standard high frequency driver is a 2’’ voice coil, titanium diaphragm unit with excellent frequency response. The ‘XF’ option specifies an upgraded HF driver with polyester diaphragm, higher sensitivity, and exceptionally smooth and extended frequency response. This driver is possibly the most ‘hi-fi’ sounding high frequency compression driver available! The high frequency horn features a dispersion of 90° horizontal by 70°vertical. This is much more than the 40° vertical dispersion typical of most boxes, since when a speaker is flown the required vertical dispersion increases. The LT1 will provide high frequency coverage from the first row to the last in nearly every situation. When ordered in pairs, they are furnished in mirror-image sets. Standard with the system is a separate 3-channel, 700-Watt rms amplifier/electronic crossover that is specifically designed for use with the speaker. This amplifier features ISP’s patent pending DCAT high-current amplification technology. A cooling fan automatically switches on when needed. Features: · 300+300+100 Wrms 3-channel amplifier with electronic crossover included. No digital processor needed. · Three-way full range active system, 12’’ woofer, 8’’ midrange, 1’’ throat high frequency compression driver. · 90 H x 70 V dispersion covers from the first row to the last. · Designed for flying with small vertical dimension and slanted top to maximize sight lines · Specifications: Configuration: 3-way LF Driver: 12’’, 500W rms, vented MF Driver: 8’’, 225W rms HF Driver (Standard) 2’’ v.c. compression, 80 W rms, titanium diaphragm, on Constant directivity horn (XF option) 1.75’’ v.c. compression, 60 W rms, polyester diaphragm, on CD horn Coverage: 90° horizontal x 70° vertical Construction: baltic birch plywood, powder coated steel grille Finish: Textured black paint (white or unfinished available) Connector XLR or ¼’’ for audio input 3-pin IEC for AC power Dimensions: 28.0” W x 16.0” H x 14.9” D Suspension (2) 3/8” - 16 Threaded mounting points on top (1) 3/8” - 16 Threaded point on back for pullback only Weight: 80 Lbs Amplifier 300+300+100 W rms, 3 channels, high current DCAT, fan cooled Built-in electronic crossover (4th order) Power Required: 5 Amps x 120 VAC Axial Sensitivity (Standard) LF: 94 dB/1W/1M, MF: 96 dB/1W/1M, HF: 104 dB/1W/1M (XF) LF: 94 dB/1W/1M, MF: 96 dB/1W/1M, HF: 107 dB/1W/1M Frequency Response (Standard) +/-3db 70Hz to 14KHz @ 1W (XFS) +/-3db 70Hz to 18KHz @ 1W Frequency Range (Standard) 54 Hz to 16 KHz (-10 dB) (XFS) 54 Hz to 19 KHz (-10 dB) Axial Sensitivity (Standard) LF: 94 dB/1W/1M, MF: 96 dB/1W/1M, HF: 104 dB/1W/1M (XF) LF: 94 dB/1W/1M, MF: 96 dB/1W/1M, HF: 107 dB/1W/1M Calculated Output LF: 119 dB SPL (long term) MF: 120 dB SPL (long term), 122 dB SPL (peak) HF (standard): 123 dB SPL (long term), 124 dB SPL (peak) HF (XF option): 125 dB SPL (long term), 127 dB SPL (peak) ARCHITECTURAL SPECIFICATIONS The ISP Technologies three-way full range loudspeaker system shall incorporate a 12-in LF transducer powered by 500W rms, a 8-in MF transducer powered by 225W rms and a 2’’ v.c. compression, 80 W rms, titanium diaphragm, on Constant directivity horn . The MF driver shall beloaded into a midrange horn constructed of 3mm birch plywood reinforced with high density polyurethane foam. The MF horn shall incorporate a phase/displacement plug. The HF driver shall be mounted coaxially within the woofer cavity and shall be loaded on a constant directivity horn with a nominal coverage pattern of 90(h) x 70(v). A device to absorb refracted HF energy shall be installed behind the HF section. An internal passive filter network shall provide fourth order acoustical crossover between the mid and high frequency sections in biamped mode and system equalization. System frequency response shall vary no more than 3 dB from 65 Hz to 17 kHz measured on axis. In biamped mode, the mid/high section shall produce a Sound Pressure Level (SPL) of 107 dB SPL on axis at 1 meter with a power input of 1 Watt, and shall be capable of producing a peak output of 139 SPL on axis at 1 meter. It shall handle 400 Watts of amplifier power (AES Standard) and shall have a nominal impedance of 8 Ohms. The LF section shall produce a Sound Pressure Level (SPL) of 100 dB SPL on axis at 1 meter with a power input of 1 Watt, and shall be capable of producing a peak output of 136 SPL on axis at 1 meter. It shall handle 1000 Watts of amplifier power (AES Standard) and shall have a nominal impedance of 8 Ohms. In triamped mode, the low frequency and high frequency sections shall meet all biamped mode performance criteria. In addition, the midrange frequency section in triamped mode shall produce a Sound Pressure Level (SPL) of 107 dB SPL on axis at 1 meter with a power input of 1 Watt, and shall be capable of producing a peak output of 139 SPL on axis at 1 meter. It shall handle 400 Watts of amplifier power (AES Standard) and shall have a nominal impedance of 8 Ohms. The loudspeaker enclosure shall be trapezoidal in shape. It shall be constructed of 15mm thickness void-free cross-grainlaminated Baltic birch plywood and shall employ extensive internal bracing. It shall be finished in black catalyzed polyurethane. Input connectors shall be one each male and female AP4 plus one each male and female AP6. The system shall include a switch allowing it to be operated in biamp or triamp powering mode. A total of six 3-position flytracks with integral 3/8"-16 threaded mounting point (3 each top and bottom) shall be provided. The front of the loudspeaker shall be covered with a black powder coated perforated steel grill backed with open cell foam to protect against dust.
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