Crest Audio LH3 LOUDSPEAKER 사양

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Features

• Smooth frequency response characteristics

• 500 Watt continuous rated woofer

• 140 Watt continuous rated mid-range 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

Loudspeaker

Power Handling

Continuous

Full Range

Other LH series loudspeakers

Description

The Crest Audio LH

prised of one 15" high-power woofer, one 8" heavy-duty mid-range, and a 2"

exit compression driver coupled to a 90° x 40° constant directivity horn.

As with all LH

biamp mode simply by plugging into the desired jack on the input plate. The

3 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 greatly 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 cabi-

net. The trapezoidal shape resists the formation of standing waves by caus-

ing the internal reflections to cancel rather than reinforce each other. This

ensures a minimum of mid-bass and mid-range coloration of the reproduced

sound due to standing waves within the cabinet.

The LH

3 is constructed of very high quality 3/4", 7-ply all-poplar plywood,

which is void-free, medium density and warp-resistant.The LH

ished with Crest Audio's durable black Hammer-Head™ poly-coating. Polymer

corners are also added to provide further protection to the cabinet.A black, pow-

der-coated heavy-gauge metal grill covers the lower section of the front of the

cabinet to protect the low and mid frequency drivers from unforeseen impacts.

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 the mid

and/or high frequency drive level to the LH3 exceeds predetermined thresh-

olds, the protection circuit is temporarily engaged. This subtly decreases the

signal level applied to the mid and/or high frequency drivers so that they will

not be damaged due to long term overpowering. Short duration transients will

not be attenuated by the protection circuit and thus have the potential to dam-

age the drivers.The protection circuit is realized through the use of a dynam-

ically resistive 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.

Program

500W

1,000W

1,200W

600W

2,000W

1,000W

2,400W

1,200W

800W

400W

1,000W

500W

2,000W

1,000W

3 is a newly designed, three-way speaker system com-

full-range speakers, this unit can be driven in full-range or

S E R I E S

Peak

2,000W

2,400W

4,000W

4,800W

1,600W

2,000W

4,000W

3 cabinet is fin-