16
Acoustical Specifications and Wiring
LT 3202
®
-III Loudspeaker Product Description
The Bose
®
Panaray
®
LT 3202
®
-III loudspeaker is a mid/high-frequency loudspeaker designed
for long throw distances. The LT 3202-III loudspeaker has the narrowest coverage character-
istics of all the LT cabinets.
When arrayed correctly, LT 3202-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 3202-III loudspeaker uses four V2 mid-frequency drivers and a 1.4" com-
pression driver mounted on a 30˚H x 20˚V constant directivity waveguide.
The LT 3202-III loudspeaker can be operated in passive, bi-amplified, or bi-amplified dual
mid-range modes.
• In passive mode, the internal 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
separate pins on the Neutrik NL8 connectors.
• Bi-amplified dual mid-range mode allows independent control of two pairs of V2 mid-fre-
quency drivers as well as control of the high-frequency driver. The mid-frequency and high-
frequency drivers are accessed through separate pins on the Neutrik NL8 connectors.
Active equalization of the LT 3202-III loudspeaker can be provided by using the Panaray
LT 3202-III EQ card or the Panaray speaker and combination of speakers. A paramet
r
ic
equalizer can replicate the active equalization curve on the following page, along with a high-
pass filter and low pass filter as shown.
LT 3202-III Acoustical Specifications
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.
LT 3202-III speaker with grille
3L
LT 3202-III speaker without grille
3
LT 3202-III speaker rear
Passive
Mid
High
Mid 1
Mid 2
High
Power Handling
1
280W
280W
75W
140W
140W
75W
Impedance
16
Ω
16
Ω
8
Ω
8
Ω
8
Ω
8
Ω
Sensitivity
2
(at 1W @ 1m)
110 dB SPL
107 dB SPL
111 dB SPL
104 dB SPL
104 dB SPL
111 dB SPL
Maximum SPL
3
(pink noise @1m @ rated power)
135 dB SPL
132 dB SPL
130 dB SPL
129 dB SPL
129 dB SPL
130 dB SPL
High Frequency:
Frequency Range
4
(
±
3 dB)
Beamwidth
(-6dB point, average 800 - 5 kHz)
Recommended Crossover
Internal Crossover
@ 1.6 kHz
Bi-amped Dual Mid-range
200 Hz - 16 kHz
Bi-Amped
HPF: 160 Hz, Butterworth, 4th order
Mid Frequency:
LPF: 1600 Hz, Butterworth, 4th order LPF: Butterworth, 4th order
HPF: Butterworth, 4th order
Horizontal: 36
°
, Vertical: 22
°
