User Guide

ManualsBrandsAtlantic Technology ManualsOtherSYSTEM 20 LCR

System 20 LCR and SR InWall Speakers

● ● ● ● ● ● ● ● ● ● ●

System 20 THX Installation Instructions

About These Speakers

System 20 by Atlantic Technology is a high performance home theater and music sound speaker system

designed to mount in the walls of your home. The system consists of a three-way full range front satellite,

System 20 LCR, and a switchable Dipole/Bipole surround speaker, System 20 SR. We recommend completing

the system (especially for movie reproduction) with the addition of a THX certified subwoofer like the Atlantic

Technology 372 PBM.

The following section details important features and capabilities of these speakers.

Please take a moment to read it over.

Some Surround Issues

The System 20 LCR is designed for the front three channels in a THX Ultra certified home theater system or as

a high quality music reproducer in a stereo system. Although it could be used as a surround speaker in a home

theater system, it doesn’t create the same kind of involving, believable surround field that the System 20 SR

Dipole surround speaker will. However, if you decide to use direct radiators for the primary surround or addi-

tional rear channels in 6.1 or 7.1 channel systems the System 20 LR (or the System 10 speaker) may certainly

be utilized.

The System 20 LCR Midrange/High Frequency Baffle

The midrange-tweeter assembly of the System 20 LR can be tilted approximately 5 degrees up or down by

removing the included leveling spacer located under the baffle. (Please see Figs. 1, 4 & 5). This lets you aim

these elements for better performance when the speaker must be placed

higher or lower than ideal. The mid-high baffle may also be rotated 90 de-

grees to allow horizontal placement of the speaker with no compromise in

performance. (Please note that

the System 20 LCR will not fit horizontally

between studs centered on 16 inches without structural modification to the

studs and/or wall

.) However, if the speakers are placed high or low, even

though the frequency response at the listening position will be improved by

tilting the baffle, the sound will noticeably come from above or below the

screen and may not be as “realistic” as when it comes from ear level. For

further information and detailed instructions on angling and rotating this as-

sembly please see Page 6

System 20 LCR High Frequency and Midrange Level Controls

There are two switches located on the mid-high baffle that are accessible by

removing the grille. You can change the switch settings with your fingernail or

a small pointed object, such as a ball point pen. The High Frequency switch

adjusts the output level of the tweeter and therefore the upper range of sounds

that are reproduced (these include cymbals, bells, etc.). The Midrange con-

trol operates exactly like the High Frequency Control but affects the middle

range frequencies (human voices, etc.).

We strongly recommend that you try all three settings of both switches, using both music and movies (if the

System 20 LR is part of a home theater system). Please note that recordings vary in their sonic balance so try

several different discs before deciding. Try to achieve the best balance of natural overall sound with good detail

and clarity. The switch settings are “Normal/THX” in the lower position, “-2dB” (decreases mid or high frequency

output) in the middle position, and “+2dB” (increases mid or high frequency output) in the upper position.

Take some time to determine the best overall sonic performance in your room. It’s definitely worth the effort.

Fig 1

Tilting and rotating baffle