Bose LT Series III, Bose Panaray Loudspeakers manual LT 9402-IIILoudspeaker Product Description

Acoustical Specifications and Wiring

LT 9402™-III Loudspeaker Product Description

The Bose® Panaray® LT 9402™-III loudspeaker is a mid/high-frequency device designed for medium throw distances. The LT 9402-III loudspeaker offers an 95˚ horizontal by 39˚ vertical dispersion pattern that allows you to cover a large seating area and direct energy away from reflective surfaces such as ceilings.

When arrayed correctly, LT 9402-III loudspeakers behave sonically as a large single source of sound energy. This Coherent Wavefront provides full fidelity and even-coverage at critical mid- and high-frequencies throughout the coverage area of the array.

Each PANARAY LT 9402-III loudspeaker uses two V2 mid-frequency drivers and a 1.4" com- pression driver mounted on a 90˚H x 40˚V constant directivity waveguide.

The LT 9402-III loudspeaker can be operated in passive or bi-amplified modes.

•In passive mode, the internal passive crossover network is utilized and a single amplified signal is connected to the loudspeaker.

•In bi-amplified mode, the mid-frequency and high-frequency drivers are accessed through

LT9402-III speaker with grille separate pins on the Neutrik NL4 connectors.

Active equalization for the LT 9402 III loudspeaker an be provided by using the Panaray

LT 9402-III EQ card or the Panaray System controller with presets for each Panaray speaker and combination of speakers. A parametric equalizer can replicate the active equalization curve on the following page, along with a high-pass filter and low pass filter as shown.

LT 9402-III Acoustical Specifications

		Passive	Bi-Amped
			Mid	High
	Power Handling1	140W	140W	75W
	Impedance	8 Ω	8 Ω	8 Ω
	Sensitivity2 (at 1W @ 1m)	106 dB SPL	106 dB SPL	106 dB SPL
	Maximum SPL3	128 dB SPL	128 dB SPL	125 dB SPL
	(pink noise @1m @ rated power)
LT9402-III speaker without grille			Mid Frequency
	Recommended Crossover		HPF: 160 Hz, Butterworth, 4th order
		Internal Crossover @ 1.6 kHz	LPF: 1600 Hz, Butterworth, 4th order
			High Frequency
			HPF: 1600 Hz, Butterworth, 4th order
			LPF: 20 kHz, Butterworth, 4th order
	Frequency Range4 (± 3 dB)		180 Hz - 16 kHz
	Beamwidth		Horizontal: 95°, Vertical: 39°
	(-6dB point, average 800 - 5 kHz)

LT9402-III speaker rear

How our loudspeakers are measured

1. Power Handling

Full bandwidth pink noise, meeting the IEC Standard #268-5, is applied to the loudspeaker and amplified to a level at the loudspeaker terminals corresponding to the power handling of the loudspeaker. The loudspeaker must show no visible damage or measurable loss of performance after 100 hours of continuous testing.

2. Sensitivity

Full bandwidth pink noise is applied to the loudspeaker with its active equalization curve and amplified to a level at the loudspeaker terminals corresponding to 1 watt as referenced to the nominal impedance. The average sound pressure level (dB-SPL) is measured at 1 meter from the speaker in an anechoic environment.

3. Maximum SPL

Full bandwidth pink noise is applied to the loudspeaker with its active equalization curve and amplified to a level at the loudspeaker terminals corresponding to the long-term rated power handling of the speaker. The average sound pressure level (dB-SPL) is mea- sured at 1 meter from the speaker in an anechoic environment.

4. Frequency Range

Sine waves are injected into the loudspeaker and the level is adjusted to 1 watt, as referenced to the nominal impedance, and the level measured at 1meter. Resulting graph is smoothed by 0.05 octave-band.

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