Lowell LUH-15TI User Manual
Model: LUH-15TI (for intercom use)
INSTRUCTIONS: UNIHORN®LUH-15TI
The UNIHORN®(model LUH-15TI for intercom use) is designed to mount
indoors or outdoors in either recessed or surface-mount applications. It can
be mounted with or without the trim ring and press-fit grille (included). In-
tallation should conform to all Federal, state and local codes and should
s
only be made by qualified service personnel.
Note: The LUH-15TI is designed for use in a talkback intercom system
and DOES NOT include a DC blocking capacitor that would be required
for speaker line supervision in a life safety system. See model LUH-15T
for life safety use.
UNIHORN
• Aluminum re-entrant horn with 70V/25V transformer (LUH-15TI)
• Aluminum trim ring: 9.6" dia. with 7.25" center cutout.
• Press-fit aluminum grille.
Tools Needed: (not included)
• Screwdrivers and tools for electrical connections.
Optional Accessories: (order separately)
®
Carton Includes: (1 ea.)
Trim ring ships with horn. It
can be discarded for installations
that do not use the press-fit
aluminum grille.
Transformer settings on
horn can be adjusted
front or rear.
LUH-BOX:
stainless steel
backbox (10.5"
sq. x 4"D)
LUH-VRG:
cast-aluminum
vandal-resistant
grille (9.6" dia.)
LUH-TP:
trim plate
(11.5" sq.)
HRP832: spannerhead screwdriver
for use with 8-32
spanner screws.
LUH-TBAR:
tile bridge
Inside diameter of trim
ring (7.25") can be used
as a cutout template.
Press-fit
aluminum grille.
Installation Methods / Accessories: the UNIHORN®can be mounted with or without the trim ring and press-fit grille. In addition, the horn features
standard screw holes that will fit the optional LUH-VRG vandal-resistant grille or any standard 8" (screw-type) speaker grille. The LUH-VRG installs
with spanner-head screws and screwdriver. Standard grilles screw-mount to the UNIHORN
®
and fit various backboxes. See individual product spec
sheets for more information on standard 8" speaker grilles and backboxes.
Installation Method Grille Backbox / Trim Plate T-bridge
Open Installation No grille N/A N/A
Press-fit aluminum grille* N/A N/A
LUH-VRG vandal-resistant grille* N/A N/A
Drywall Press-fit aluminum grille No backbox N/A
LUH-VRG vandal-resistant grille No backbox N/A
Lay-in Tile Ceiling Press-fit aluminum grille No backbox LUH-TBAR**
LUH-VRG vandal-resistant grille No backbox LUH-TBAR**
Masonry Press-fit aluminum grille LUH-BOX (recessed) + LUH-TP trim plate N/A
LUH-VRG vandal-resistant grille LUH-BOX (recessed) + LUH-TP trim plate N/A
Surface-mount Press-fit aluminum grille LUH-BOX (surface) N/A
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.
Clamp horn with trim
ring to ceiling.
Press-fit grille to horn.
No. i-201
(rev. 02.15.11)
pg. 1 of 2
©2010 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.
Model: LUH-15TI (for intercom use)
INSTRUCTIONS: UNIHORN®LUH-15TI
HORN ASSEMBLY
without trim ring/grille
.72"
3
Transformer is
adjustable on
front and rear.
Connections:
Model LUH-15TI ships ready for
hookup with a 2-conductor cable
exiting through a rear cable clamp.
7.1" housing
7.25" cutout
8.0"
Black
White stripe
HORN ASSEMBLY
with trim ring/grille.
7.1" housing
7.25" cutout
3.3"
.77"
0
Installed depth is less with the trim ring/grille as the
trim ring overlaps and extends beyond horn face.
9.6"
Specifications:
Model No. LUH-15TI
Power Rating: 15W
Frequency Response: 740Hz - 7.4kHz +/- 6dB
Dispersion: 80˚
SPL: 105dB 1W/1M, 101dB 15W/10-ft., 106dB 15W/10-ft.*
Calculated Max SPL: 116.8dB 15W/1M
Impedance: OHMS: 5000, 2500, 1300, 666, 333, 89, 45
Power Taps: 25V@ .48, .94, 1.8, 7.5, 15W
Size: 7.1" rear dia., 8" face dia., 3.72"D, 9.6" dia. grille
* 3dB increment rating with a sweep sine-wave signal source flat weight SPL meter.
REAR CONNECTION
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 laborsaving installation.
70V@ .9, 1.8, 3.8, 7.5, 15W
Mounting Clamps: LUH-15TI ships with screwdriver-adjustable clamps.
CLAMPS (as shipped): The out-of-box position of clamps
will accept depths of 0–1.5" (approx).
Transformer Settings:
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 flat weight SPL meter.
Transformer adjustment
from front.
No. i-201
(rev. 02.15.11)
pg. 2 of 2
Transformer adjustment from
rear (under rubber plug).
** Note switch positions 6 and 7 ARE NOT USED on 70V applications. They exceed the
capacity of the driver and transformer and could damage or destroy the driver and/or amplifier.
©2010 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)
CLAMPS (reversed): The clamp position can be reversed by
installer to accept depths of 1"–2.125" (approx).
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