Crest Audio LH7M LOUDSPEAKER Specifications

Features
• Smooth frequency response characteristics
• 500 watt continuous rated woofer
• 150 watt continuous rated compression driver
• 60 degree x 40 degree Constant Directivity horn with 2" throat
• High power crossover components
• Neutrik Speakon ® connectors with automatic switching bi-amp input
• Dual-angle cabinet design
• Recessed steel handles with comfortable round hand-grip
• Stand adapter for side-fill use
• 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 7M 1,000W
Other LH series loudspeakers
LH TM 1
LH TM 2
LH TM 3
LH TM 4
LH TM 5M
LH TM 6M
Description
The Crest Audio LH™7M is a newly designed two-way stage monitor
comprised of two 12" high-power woofers, one 2" exit compression
driver coupled to a 60° x 40° constant directivity horn.
As with all LH™ full-range speakers, this unit can be driven in full-
range or bi-amp mode simply by plugging into the desired jack on the
input plate. The LH™7M cabinet has a dual-angle back for use in long
and short throw applications. This shape also greatly reduces the
build-up of internal standing waves. Standing waves are internal ampli-
tude peaks that occur due to reflections within the cabinet at frequen-
cies related to the internal dimensions of the cabinet. This ensures a
minimum of mid-bass and mid-range coloration of the reproduced
sound due standing waves within the cabinet. Additionally, a stand
mount adapter is included for easy side-fill applications.
The LH™7M is constructed of very high quality 3/4" 7-ply all-Poplar ply-
wood, which is void-free, medium density, and warp-resistant.The LH™7M
cabinet is finished with Crest Audio's durable black Hammer-Head poly-
coating. Polymer corners are also added to provide further protection to the
cabinet. A black powder-coated heavy-gauge metal grill covers the entire
front of the monitor to protect the drivers from unforeseen impacts.
Crest Audio's protection circuit for mid and high frequency driver pro-
tection is included as a standard feature. The input signal is routed
through the protection circuit in both full-range and bi-amp modes of
operation. When high frequency drive level to the LH™7M exceeds
predetermined thresholds, the protection circuit is temporarily
engaged. This subtly decreases the signal level applies to high fre-
quency driver so that it will not be damaged due to long term over-
powering. Short duration transients will not be attenuated by the pro-
tection circuit and thus have the potential to damage the driver. The
protection circuit is realized through the use of a dynamically resistive
component in conjunction with a switched padding circuit.
An additional feature of the crossover is the use of a new switching
Neutrik Speakon
essary to manually switch, or move jumpers to reconfigure the
crossover circuitry when bi-amping any of the LH series loudspeak-
ers. This connector is wired 1+, 1- for the woofer, with 1+ being posi-
tive, and 2+, 2- for the high frequency driver, with 2+ being positive.
As with the full range inputs, simply insert your Speakon bi-amp plug
into the bi-amp input connector, and twist clockwise 1/8 turn. This sim-
ple action switches out the crossover, and simultaneously connects
the woofer and driver directly to the bi-amp speaker cable.
7M
TM
Program
2,000W
1,200W
600W
2,000W
1,000W
1,000W
500W
2,400W
1,200W
800W
400W
1,000W
500W
® connector for the bi-amp input. It is no longer nec-
S E R I E S
Peak
4,000W
2,400W
4,000W
2,000W
4,800W
1,600W
2,000W