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Using the Subwoofer Low Pass Control

When used with the complete Atlantic Audio System 4400,

the subwoofer's low-pass control should be set at around 80Hz

(unless you are using a processor with its own built-in cross-

over). The low-frequency response of the System 4400 satel-

lites has been optimized to work with approximately an 80Hz

crossover point. Higher crossover frequencies pass more bass

but can sound boomy and may be more easily localized to the

subwoofer.

A higher crossover frequency setting than 80Hz may be suitable,

however, when using very small satellites that have no real low

frequency performance. Settings lower than 80Hz should be em-

ployed if you are using larger main speakers with extended bass

response. The subwoofer should only produce the very lowest

bass that is below range of the main speakers.

Consult the manufacturer's specified low frequency response for

your main speakers to determine an approximate low pass set-

ting on your subwoofer.

The Phase Invert Control

A switch that reverses the phase of the subwoofer is provided on

the amplifier panel. Listen to a monaural musical source with

strong, consistent bass content while someone else flips this

switch. The switch only affects the narrow range of bass output

that is shared between the "upper end" of the subwoofer's output

and the "lower end" of the main speaker's output. Leave the

switch in the position that has stronger output. Then fine tune

the subwoofer's low pass and volume adjustment.

It is possible you will not hear a difference between the two

settings of this switch. If you do not hear a difference, it

indicates your main speakers and subwoofer are not precisely

"in-phase" or "out-of-phase" at the narrow range of bass cov-

ered by both speakers.

If so, just use the low pass and volume adjustments to set the

subwoofer balance.

A Word About Bass, Center Channel Modes and System Set Up

Many surround processors and receivers feature a "Wide" and

"Normal" mode for the center channel speaker. Atlantic Tech-

nology recommends that the center channel be operated in the

"Normal" mode when using a powered subwoofer. The center

channel speaker will sound more dynamic and the intelligibility

of the system will generally be improved when in the "Normal"

mode.

SBT-1000 & SBT-500 Powered Subwoofers

With discrete digital "5.1, 6.1, or 7.1" channel systems (Dolby

Digital, DTS, etc.), many controllers provide a Bass Management

option, which lets you set the front and rear speakers in a lim-

ited bandwidth (Small) or full range (Large) mode. When using

a subwoofer with Atlantic Technology speakers we recommend

setting such a controller to the Small position for all the speakers

in the system.

Care of Your Subwoofer

Atlantic Technology subwoofers are constructed from thick Me-

dium Density Fiberboard. MDF is a non-resonant material ideal

for speaker system enclosures. To clean the cabinet you may use

a soft cloth either dry or slightly dampened with clean water.

Be careful not to wet the cabinet or allow any water to enter the

cabinet seams. Avoid placing your speakers in direct sunlight or

near a source of heat that may, over time, damage the finish.

IMPORTANT: Save The Carton Assembly!

Save all packing materials until you are certain the

system has suffered no damage in shipment. If you find

such damage, either visible or internal, contact your

dealer immediately for the proper return procedure.

If at all possible, save the carton assembly. There is no

substitute should you need to move or ship your sub-

woofer for any reason.