Crest Audio LH1 LOUDSPEAKER Specifications

Features
• Smooth frequency response characteristics
• 600 Watt continuous rated woofer
• 150 Watt continuous rated compression driver
• 90 degree x 40 degree constant directivity horn with 2" throat
• High power crossover components
• Neutrik Speakon ® input connectors, with automatic biamp switching
• 15 degree trapezoidal cabinet design
• Recessed steel handles with comfortable round handgrip
• Heavy gauge metal grill with black, powder-coat finish
• High-impact resistant polypropylene cabinet corners
• Rugged stand adapter
• Exterior grade 3/4" 7-ply all poplar APA-1 plywood
• Scuff and weather resistant, black Hammer-Head™ finish
LH
Loudspeaker
Power Handling Continuous
Full Range
LH TM 1
Other LH series loudspeakers
LH TM 2
LH TM 3
LH TM 4
LH TM 5M
LH TM 6M
LH TM 7M
Description
The Crest Audio LH
high power woofer, one 2" exit compression driver coupled to a 90° x 40° con-
stant directivity horn.
As with all LH
biamp mode simply by plugging into the desired jack on the input plate. The
LH TM 1 has a trapezoidal shaped cabinet, rather than the more traditional rec-
tangular shape.This allows cabinet arrays to be constructed more easily.This
shape also reduces the build-up of internal standing waves. Standing waves
are internal amplitude peaks that occur due to reflections within the cabinet
at frequencies related to the internal square dimensions of the cabinet. The
trapezoidal shape resists the formation of standing waves by causing the
internal reflections to cancel rather than reinforce each other. This ensures a
minimum of mid-bass and mid-range coloration.
Crest Audio's protection circuit for mid and high frequency driver protection is
included as a standard feature.The input signal is routed through the protec-
tion circuit in both full-range and bi-amp modes of operation. When high fre-
quency drive level to the LH
tection circuit is temporarily engaged. This subtly decreases the signal level
applied to the high frequency driver so that it will not be damaged due to long-
term overpowering. Large amplitude, short duration transients will not be
attenuated by the protection circuit and thus have the potential to damage the
driver.The protection circuit is realized through the use of a dynamically resis-
tive component in conjunction with a switched padding circuit.
An additional feature in the crossover circuitry is a mid-range contour switch.
This switch allows a choice between flat (HIGH position) and mildly attenuat-
ed (NORMAL position) mid-range frequencies. The position of this switch is
purely dependent on venue and personal sonic taste. As a suggestion, the
NORMAL position is more suitable for live (highly reflective, long reverb time)
venues. Whereas, the HIGH position is more suitable in venues where the
reverb time is relatively short.This switch is located on the rear panel input plate
and is actuated with a suitable tool such as a flat screwdriver tip, or door key.
1
TM
Program
600W 1,200W
2,000W
1,000W
1,000W
500W
2,400W
1,200W
800W
400W
1,000W
500W
2,000W
1,000W
TM 1 is a two-way speaker system comprised of one 15"
TM full-range speakers, this unit can be driven in full-range or
TM 1 exceeds predetermined thresholds, the pro-
S E R I E S
Peak
2,400W
4,000W
2,000W
4,800W
1,600W
2,000W
4,000W