Manual Klipsch SWS (page 9 of 12) (English)

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S W S

P ro M e d i a

Subwoofer System

FIGURE 3

FIGURE 4

Room boundaries work a similar sort of magic,

but uniformly over a fairly wide frequency range.

Move dual subwoofers from the middle of a room

to up against a wall, and they will play 12-dB

louder than a single sub (Fig. 1). Slide the two

subs inot a corner fo another 6-dB, yields +18dB

(Fig. 2). What does that mean? A 1-dB (decibel)

volume change is about the smallest we can rec-

ognize as a level change. To hear a really obvious

difference, you need about a 3-dB change. And

to get a subjective doubling you need about a 10-

dB level boost. So the gain achieved by moving a

subwoofer into a corner is a pretty big deal.

Which brings us to the glory of multiple sub-

woofers. Put a second subwoofer right next to your

first one, operating at the same level, and you get

about a 6-dB increase in total acoustic output.

T h a t ’s equivalent to increasing the amplifier power

by four times! Double the number of subwoofers

again, and you get another 6-dB increase (Fig. 3).

T h a t ’s equivalent to another quadrupling of amplifi-

er power, or sixteen times the original. And so on.

I t ’s the ultimate scalable system.

Combining all these tricks can yield quite formida-

ble bass from very compact subwoofers, right

down to the very lowest audible frequencies. Over

time, you can build the sonic equivalent of a much

larger subwoofer just by daisy-chaining additional

SWS subs into your system (Fig. 4). Not quite a

free lunch, but certainly a very economical one.

Warning

Do not vertically stack more than three

SWS units!

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Klipsch SWS Manual

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