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Products and
accessories
Bose
Panaray
®
LT
MB24-III
modular bass
loudspeaker
BOSE® PROFESSIONAL SYSTEMS DIVISION – COMPLETE COMMERCIAL SOLUTIONS
Customer
Focus
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design
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you buy
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and accessories
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PRODUCT OVERVIEW
The Panaray
®
LT MB24-III modular bass
loudspeaker is a compact, low-frequency
loudspeaker designed exclusively for use
with the Panaray LT mid/high-frequency
loudspeaker family.
The LT MB24-III integrates two 12” woofers
in a proprietary acoustic enclosure. This
enables the LT MB24-III to deliver high SPL
and wide bandwidth without audible port
noise. The size of the LT MB24-III has also
been optimized so that it can be used in
multiple bass array configurations.
PRODUCT INFORMATION
Each Panaray LT MB24-III bass loudspeaker
uses two 12” low-frequency drivers built
into a proprietary acoustic enclosure.
The LT MB24-III can be operated in parallel
or discrete modes.
In parallel mode, a single amplified signal is
connected to the loudspeaker.
In discrete mode, each loudspeaker can be
independently driven by a separate amplifier.
Individual drivers are accessed through
separate pins on the Neutrik NL4 connectors.
The 13-ply, marine-grade, Baltic birch
enclosure has sixteen hang points, four
each on the top, bottom and sides. Each
hang point will accept SAE 3/8 - 16 rigging
hardware.
KEY FEATURES
• Proprietary acoustic enclosure provides
clean, loud bass with high driver reliability
• Enclosure size has been optimized to be
used in multiple bass array configurations
• High SPL without audible port noise
• 13-ply, marine-grade, Baltic birch
enclosure
• 16 stainless steel hang points
• Contoured, powder-coated, stainless steel
grille
• Selectable parallel and discrete modes
• Designed for indoor and most outdoor
applications*
• Optional bass array rigging accessories
available from ATM Fly-Ware
®
APPLICATIONS
The LT MB24-III loudspeaker is well-suited
for professional installations such as:
• Stadiums
• Arenas
• Houses of worship
• Auditoriums
• Performing arts facilities
• Dance clubs
• Outdoor* events facilities
* LT loudspeakers can be installed outdoors under cover.
Bose® Panaray® LT MB24-III modular bass loudspeaker
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DETAILED PRODUCT SPECIFICATIONS –
ACOUSTIC
ADDITIONAL PRODUCT INFORMATION
The Panaray
®
LT MB24-III loudspeaker
requires equalisation through the use of
Bose® active equalisation or by using a highpass filter and a low-pass filter. Equalisation
is required for both parallel and discrete
configurations.
Active equalisation for the LT MB24-III
loudspeaker can be provided by using the
Panaray LT MB24-III EQ card or the Panaray
system digital controller. A parametric
equaliser using a high-pass and low-pass
filter can replicate the active equalisation
curve below.
ACTIVE EQUALISATION CURVE
Recommended controller
The Panaray System Digital Controller has a
universal power supply for worldwide use.
Variants of the product refer to the AC cord
included with the product.
Available EQ Cards
Panaray LT MB24
Modular Bass EQ card-II-S PC 35474
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ON-AXIS RESPONSE –
IMPEDANCE VS. FREQUENCY
Passive
Bi-amp
Bi-amp
DRIVER COMPLEMENT
Two 12” low-frequency drivers built into a
proprietary acoustic enclosure.
CONSTRUCTION FEATURES
13-ply, marine-grade, Baltic birch enclosure
with 16 stainless steel hang points and a
powder-coated, stainless steel grille.
HANG POINTS
Sixteen steel threaded inserts – 4 top, 4
bottom, and 4 on each side – allow for easy
rigging. The threaded inserts are SAE 3/8 16 thread, with at least 18 usable threads.
RIGGING
Rigging hardware for the Panaray
®
LT MB24
can be purchased from ATM Fly-Ware
®
. For
more information contact ATM Fly-Ware at
www.ATMflyware.com.
DIMENSIONS
648 mm x 508 mm x 714 mm
(25.5”D x 20”W x 28.1”H)
WEIGHT
59 kg (129 lb)
SHIPPING WEIGHT
67 kg (147 lb)
FINISH
Each loudspeaker is manufactured with
a textured black polyurethane finish and
contoured, powder- coated, stainless steel
grille. Both cabinet and grille can be painted
to match the surroundings.
CONNECTORS
Two Neutrik NL4 connectors wired in
parallel.
NL4 WIRING DIAGRAM
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ENGINEERS’ AND ARCHITECTS’
SPECIFICATIONS
The low-frequency loudspeaker shall be a
multiple driver, low-frequency system with
matched active equalisation as follows:
The transducer complement shall consist of
two low-frequency drivers of 12” diameter,
mounted symmetrically.
The bass enclosure shall be composed of
13-ply marine-grade Baltic birch with 16
stainless steel hang points and a paintable
contoured stainless
steel grille. Its outer dimensions shall be 648
mm x 508 mm x 714 mm (25.5”D x 20”W x
28.1”H ). Its weight shall be 59 kg (129 lb).
The loudspeaker shall comply with ANSI/EIA
636 for electrical and mechanical safety and
for the EU EMC directives 89/336/EEC and
92/31/EEC.
All versions of this product shall bear the CE
mark, unless restricted to North American or
Japanese markets.
The loudspeaker shall be the Bose
®
Panaray®
LT MB24-III loudspeaker.
TECHNICAL LITERATURE
PANARAY LT Reference Guide
Available at pro.bose.com
SAFETY AND REGULATORY
COMPLIANCE
The LT MB24-III loudspeaker complies with
ANSI/EIA-636 Recommended Loudspeaker
Safety Practices and with EU EMC Directives
89/336/EEC for CE marking.
SAFETY FEATURES
EIA-636: Recommended Loudspeaker Safety
Practices.
This document is a set of guidelines
related to the safe design and testing of
loudspeakers and their components set
by the Electronics Industry Association.
Although one cannot list a product to the
standard, Bose has performed the tests
outlined for the LT MB24-III and it complies
with the standard as set forth in EIA-636.
WARRANTY
The Bose Panaray LT MB24-III mid/highfrequency loudspeaker is covered by a 5year, transferable limited warranty.
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 equalisation
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 equalisation
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 measured 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 1W, as
referenced to the nominal impedance, and
the level measured at 1m. Resulting graph is
smoothed by 0.05 octave-band.
All information subject to change without notice.
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BOSE
Customer
Focus
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