Lexicon CP-1 User Manual download pdf (Page 18)

Lexicon

Page 14

Speaker

Set-Up and

Configuration

Notes on

Amplifiers

How much power do you need? That depends on a number of variables —

How efficient are your speakers? How big is the room? How loud do you

play the system? Generally, the demands on the side and rear channels are

higher for film sound than for music. The center channel is actually the most

important channel on most film soundtracks. Your center amp/speaker

combination should be able to achieve the same sound pressure levels as the

main left and right speakers. Increasing the Bass Blend parameter in the Pro

Logic and Stereo Logic modes will help relieve the center channel of the

heavy low frequency demands, but is not a suitable substitute for a decent

amp/speaker combination. The surrounds will not generally require quite

as much power, but there can be substantial energy requirements during

crescendos. Consider at least 45-60 watts minimum for your rear channel

amplifier.

Notes on Speaker

Placement

The CP-1’s Configuration routine allows a wide range of choices in speaker

and room set-ups to maintain optimal performance as your system ex-

pands. If you are starting with a conventional two-channel system, in what

order should you add additional channels? The answer depends on

whether you are primarily interested in audio or video.

Best

The film enthusiast with only two stereo speakers should place them

relatively close on either side of the screen and use Panorama for both music

and films. Beyond this, the very first priority should be a center channel

above or below the screen for dialog (Configuration 2). An alternative is

Configuration 3, in which two front speakers and one rear are used with

either the Panorama or Pro Logic programs.

A dramatic improvement will be noticed when increasing from two or three

speakers to four. These should be arranged as in Configuration 6, but with

the front left and right speakers spread quite wide, perhaps all the way

around to the sides — making a diamond pattern with the listener in the

center. How widely you space the front channels will depend on how

deeply immersed in the sound track you want to be; the full diamond

configuration can considerably heighten the sense of emotional involve-

ment in many movies. This arrangement has the advantage of using

amplifiers and speakers in pairs.

Good

Better

For Film

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Lexicon CP-1 User Manual Page 18

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