Manual Paradigm UltraCube 12 (page 9 of 20) (French)

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fiNe TuNiNg

Once you have the rest of your speakers positioned in the room and have

set speaker distances and calibrated speaker levels with your Processor

or A/V Receiver, it’s time for a little ﬁne tuning of the subwoofer(s).

Subwoofer Controls

When setting the subwoofer controls use music and video soundtracks

that you know well. They should contain selections with extended bass

that is continuous and repetitive. When you are adjusting your subwoofer,

remember: Bass should not be overbearing—the subwoofer should not

draw attention to itself—but sound shouldn’t be “thin” or difﬁcult to hear.

Certain subwoofer placement may result in bass frequency cancellations—

this occurs when your front speakers and subwoofer are “out-of-phase”, in

other words, they work against each other through the crossover region.

This will result in bass being reduced. If bass sounds weak or dislocated

adjust the phase according to the instructions that apply to your subwoofer

in the setup procedures that follow.

For Subwoofers that have a Sub/Sat Phase Switch

1. Turn the Subwoofer Level control completely counter-clockwise to

its minimum;

2. Turn the Subwoofer Cut-Off Frequency control to 150 Hz;

3. Turn the Sub./Sat. Phase Alignment control to 0° (completely

counter-clockwise) ;

4. While you listen to a selection in your primary listening area, have an

assistant turn up the Subwoofer Level control until the subwoofer

can be clearly heard;

5. Have your assistant slowly rotate the Sub./Sat. Phase Alignment

control until you hear the most bass. Your subwoofer and front speakers

are now “in phase.” Do not change phase alignment again unless you

move your subwoofer or front speakers;

6. Turn the Subwoofer Level control completely counter-clockwise to

its minimum;

7. Turn the Subwoofer Cut-Off Frequency control completely counter-

clockwise to 50 Hz;

8. Slowly rotate the Subwoofer Level control until you match the

subwoofer output level with the level of your front speakers. Bass

should be clearly audible, but not intrusive;

9. Slowly rotate the Subwoofer Cut-Off Frequency control until you

hear the best subwoofer/main speaker blend. If the sound is too

“thin,” you have not set the frequency high enough; if the sound

becomes “boomy” you have set the frequency too high. Adjust until

you ﬁnd the most natural balance.

SETTING SUBWOOFER CONTROLS

For Subwoofers that have a Sub./Sat. Phase Alignment Control

Set tone or equalizer controls on your receiver or preampliﬁer to ﬂat (or 0°) and switch any loudness controls off.

Set tone or equalizer controls on your receiver or preampliﬁer to ﬂat (or 0°)

and switch any loudness controls off. If your subwoofer is positioned in

the front of the room, the optimal position for the Phase Switch is typically

at the 0° position; if your subwoofer is positioned in the rear of the room,

the switch should be set to the 180° position.

1. Turn the Subwoofer Level control completely counter-clockwise to

its minimum;

2. Turn the Subwoofer Cut-Off Frequency control completely counter-

clockwise to 50 Hz;

3. Slowly rotate the Subwoofer Level control until you match the

subwoofer output level with the level of your front speakers. Bass

should be clearly audible, but not intrusive;

4. Slowly rotate the Subwoofer Cut-Off Frequency control until you

hear the best subwoofer/front speaker blend. If the sound is too

“thin,”

you have not set the frequency high enough; if the sound becomes

“boomy” you have set the frequency too high. Adjust until you ﬁnd the

most natural balance.

NOTE: If bass sounds weak or dislocated, you may have a phase alignment

problem. Simply ﬂip the Phase switch to the opposite position and listen

to see which switch position gives you the most bass energy in the room.

To further enhance performance, you can also experiment with the

subwoofer’s location in the room to ﬁnd an area that yields the best

overall bass balance and ﬁdelity.

When the subwoofer is used with high-sensitivity speakers more volume

gain may be required. If your subwoofer has two (L/R) low-level input jacks

you can obtain 6 dB more gain by using a “Y” cable and plugging into both

input jacks (not shown).

USING YOUR SUBWOOFER WITH HIGH-SENSITIVITY SPEAKERS

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Paradigm UltraCube 12 Manual

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