Lowell LUH-15TI Specifications
Model: LUH-15TI
LOWELL UNIHORN®LUH-15TI
Description
UNIHORN
®
model LUH-15TI for use with intercoms is engineered for
labor-saving installation in brick, concrete block, plaster, drywall and
acoustic tile— indoors or outdoors—in recessed or surface-mount applications. This 15W universal-use re-entrant horn mounts into 4"D spaces
to provide clear intelligibility with high SPL output over the extended vocal
range. The ready-to-install package includes a self-contained aluminum
housing with moisture-seal cover, contoured aluminum trim ring and
press-fit aluminum grille. Connections are secured through a rear metal
clamp and the 25/70V transformer is screwdriver-adjustable on the front
and rear. Simple 2-wire hookup and 105dB SPL (1W1M) make this ideal
for standard voice communication applications including talk-back intercom use. Cast aluminum trim ring is made to snugly fit the fine-perforated
aluminum screen grille which press-fits for a hardware-free finish. Trim
ring also serves as template. Network Grey powder epoxy finish.
Features:
• Ready-to-install 15W aluminum re-entrant horn with 70V/25V trans-
former. Includes aluminum trim ring and press-fit aluminum grille.
• Weather-resistant housing.
• Mounts with or without the trim ring and press-fit grille (included).
• Installs with clamps or screws in new or retrofit areas, with or without
4"D backbox (order separately).
• Easy 2-wire hookup to rear access cable clamp.
• 25/70V transformer is screwdriver-adjustable on front and rear.
• Will also accept a standard screw-mount grille and/or backbox for 8"
speaker (not included).
• For intercom or standard voice communication applications.
• The LUH-15Ti has met or exceeded the requirements of the UL1480
Fifth Edition “Low Temperature Test” and “High Temperature Test” and
is capable of operating within an ambient temperature range of -40˚F
(-40˚C) to 151˚F (66˚C).
A & E Specifications:
The re-entrant horn loudspeaker shall be Lowell Model LUH-15TI. It shall
be a self-contained compression driver within an aluminum weather-resistant housing that can be installed into 4"D spaces. Power rating shall be
15 watts continuous. Frequency response shall be 740Hz-7.4kHz (+/6dB). Sound pressure level shall be 105dB (1W1M) average, 116.8dB SPL
(max) 15W/1M calculation based on power rating and measured sensitivity. Dispersion shall be 80 degrees @2000Hz (-6dB). The unit shall include
a 70/25V transformer with taps selectable on front and rear of horn. The
horn will ship ready for standard two-wire connection with cable exiting
through a rear cable clamp. The housing shall be 7.1” dia. at its widest
measure with an 8" dia. flat face. The assembly shall include an aluminum
trim ring/grille that is 9.6” dia. with no visible hardware and neutral grey
finish. The assembly shall mount using (3) screwdriver activated clamps
that are adjustable for depths of 0-1.5” or 1-2.125" or can be mounted
using screws (not included). [The horn Model LUH-15TI, using supplied
trim ring/grille or optional vandal-resistant grille Model LUH-VRG, shall
clamp mount to recess/surface backbox Model LUH-BOX. For recessed
applications trim plate Model LUH-TP shall also be specified. For acoustic
tile applications tile bridge Model LUH-TBAR shall be specified.]
Trim ring ships
with horn.
Inside diameter of trim ring (7.25") can be
used as a cutout template.
Transformer settings on horn
can be adjusted front or rear.
The press-fit aluminum
grille (included) is not
needed for some applications. A vandal-resistant grille is available as
an optional accessory.
Optional Accessories: (order separately)
LUH-VRG:
vandal-resistant grille
HRP832:
spanner-head screwdriver
LUH-BOX
stainless steel backbox
LUH-TP
trim plate
LUH-TBAR
tile bridge
• LUH-VRG (vandal-resistant grille): 8.02" dia. cast-aluminum grille
with secondary stainless steel barrier screen mounts directly to the
9.6" dia. trim ring with spanner screws. Network grey.
• HRP832 (spanner-head screwdriver): for use on 8-32
spanner screws used with vandal-resistant grille.
• LUH-BOX (backbox): 10.5" sq. x 4"D stainless steel surface or recessed backbox for extreme environments.
• LUH-TP (trim plate): 11.5" sq. trim plate covers rough openings in re-
cessed installations.
• LUH-TBAR (tile bridge): distributes weight of horn assembly when
installed in acoustic tile ceilings.
Model No. Description. Size Weight
LUH-15TI 15W UNIHORN® for intercom use 7.1" rear dia., 8" face dia., 3.72"D, 9.6" dia. grille 6 lbs.
LUH-VRG Vandal-resistant Grille 8.02"
HRP-832 Spanner-head Screwdriver --LUH-BOX Stainless Steel Backbox 10.5" sq. x 4"D
LUH-TP Trim Plate 11.5" sq.
LUH-TBAR Tile Bridge
Spec No. 1125
(rev. 03.14.11)
pg. 1 of 4
©2012 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 63069. Phone–800.325.9660
Fax—636.257.6606. Lowell makes every effort to provide accurate information while reserving the right to
change specifications and/or improve manufacturing methods without notification. (lowellmfg.com)
HORN ASSEMBLY
without trim ring/grille
7.1" housing
7.25" cutout
HORN ASSEMBLY
with trim ring/grille.
7.1" housing
7.25" cutout
REAR CONNECTION
3.72"
Transformer is
adjustable on
front and rear.
8.0"
TRANSFORMER Settings:
Transformer adjustment
from front.
Transformer adjustment from
rear (under rubber plug).
3.3"
0.77"
Installed depth is less with the trim ring/grille as the
trim ring overlaps and extends beyond horn face.
Rear-access transformer
taps are protected by a
rubber plug.
Two-wire connection
secures through a
metal clamp.
Three adjustable clamps
swing out to provide
labor-saving installation.
9.6"
Screw holes accept an optional 8" vandal-resistant
grille instead of the press-fit aluminum grille supplied.
Switch Watts@ SPL@10ft. Watts@ SPL @10-ft
Position Impedance 70V 70V 25V 25V
1 5000 0.9 94dB* NOT USED --2 2500 1.8 97dB* NOT USED --3 1300 3.8 100dB* 0.48 91dB*
4 666 7.5 103dB* 0.94 94dB*
5 333 15 106dB* 1.8 97dB*
6 89 DO NOT USE** --- 7.5 102dB*
7 45 DO NOT USE** --- 15 105dB*
* 3dB increment rating with a sweep sine-wave signal source 0 flat weight SPL meter.
** Note switch positions 6 and 7 ARE NOT USED on 70V applications. They exceed capacity
of the driver and transformer and could damage or destroy the driver and/or amplifier.
Installation Methods / Accessories (order separately): the UNIHORN
speaker grille. The LUH-VRG installs with spanner-head screws and screwdriver. Standard grilles screw-mount to the UNIHORN
®
will also accept the LUH-VRG vandal-resistant grille or any standard 8"
®
and fit various back-
boxes. See individual product spec sheets for more information on 8" speaker grilles and backboxes.
Installation Method Grille Backbox / Trim Plate T-bridge
Open Installation Press-fit aluminum grille* or LUH-VRG vandal-resistant grille* or no grille N/A N/A
Drywall Press-fit aluminum grille or LUH-VRG vandal-resistant grille No backbox N/A
Lay-in Tile Ceiling Press-fit aluminum grille or LUH-VRG vandal-resistant grille No backbox LUH-TBAR**
Masonry Press-fit aluminum grille or LUH-VRG vandal-resistant grille LUH-BOX (recessed) + LUH-TP trim plate N/A
Surface-mount Press-fit aluminum grille or LUH-VRG vandal-resistant grille LUH-BOX (surface) N/A
*Tighten dog ears to hold trim ring in place. **T-bridge is recommended for acoustic tile ceilings.
Lay-in Tile Ceiling or Drywall: horn with trim
ring clamps to ceiling (tile bridge is recommended
for acoustic tile). Grille press-fits to horn assembly. No visible screws.
Spec No. 1125
(rev. 03.14.11)
pg. 2 of 4
Clamp horn with trim
ring to ceiling.
Press-fit grille to horn.
©2012 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 63069. Phone–800.325.9660
Fax—636.257.6606. Lowell makes every effort to provide accurate information while reserving the right to
change specifications and/or improve manufacturing methods without notification. (lowellmfg.com)
Masonry: 10.5" sq. x 4"D stainless steel backbox
mounts into masonry wall. LUH-TP trim plate screws to
backbox. Horn with trim ring clamps to trim plate (trim
ring covers screws). Grille press-fits to horn assembly.
Recess-mount
LUH-BOX to
masonry wall.
Screw LUH-TP trim
plate to backbox.
Clamp horn with
trim ring to plate.
Press-fit
grille to horn.
Surface-mount: 10.5" sq. x 4"D stainless steel
backbox surface-mounts to wall. Horn with trim ring
clamps to box (ring covers unused screw holes).
Grille press-fits to horn assembly.
Surface-mount
LUH-BOX
to wall.
Clamp horn with
trim ring to box.
Press-fit
grille to horn.
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