Acoustech H-100II Manuel du propriétaire - Page 9

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It's now time to test the H-100II subwoofer in your listening environment.

1. Before turning your stereo system and subwoofer on, double-check all connections.

2. Turn the volume controls on both the subwoofer and your audio receiver all the way down (fully counterclockwise)

and check that the PHASE SWITCH is set to 0° and CROSSOVER FROM RECEIVER OR SUB SWITCH is set to the

proper setting (see Page 5, #7).

3. Turn your stereo system and then subwoofer to the ON position by using the POWER AUTO-ON SWITCH. (See

details on Page 5, #2 regarding AUTO position after performing the "Initial Listening Test").

4. Confirm that the subwoofer's green POWER INDICATOR LED is glowing. If it isn't, check the power connections

between the subwoofer and the wall outlet.

5. Play a musical selection that you are familiar with. Pick a song that has regular low bass beats. Advance the audio

receiver's volume control up to a normal listening level. If you don't hear sound through your main speakers, turn off

the system and check connections. Also consult the troubleshooting tips.

6. If sound is coming out of your main speakers, slowly turn the sub amp's VOLUME CONTROL clockwise until you

hear noticeable additional bass. If you don't hear bass by the time you have advanced the subwoofer's VOLUME CON-

TROL halfway, turn off the system and check connections. Also consult the troubleshooting tips.

7. Adjust the sub amp's VOLUME CONTROL until you are satisfied with the amount of bass (care should be taken not

to overdrive the subwoofer to the point of audible distortion). You may want to try several different movies, tapes, com-

pact discs or DVDs while determining how high to adjust the volume. The amount of bass will vary from disc to disc

and between different types of music.

8. Now that you have adjusted the quantity of bass through the volume, it's time to work on the quality of the bass by

experimenting with subwoofer placement in your room and adjusting the crossover and PHASE SWITCH.

a. Subwoofer Placement (Also See Page 3 "Placement") – Subwoofer placement is extremely important because

it dramatically affects the bass quality. An optimally placed subwoofer is much more powerful and nice sounding than

a poorly placed one. While playing music, move the subwoofer around, in and out of corners, closer and farther from

the wall, etc. – as much as the power cord or other connections will allow to determine the best placement. You may

also want to try the "subwoofer crawl" technique found in the last paragraph of "Placement", Page 3.

b. Crossover – If you have hooked your subwoofer to a Dolby Digital, DTS, THX, or Bass Management receiver, you

will need to refer to your receiver's user manual for instructions on how to adjust and set your subwoofer crossover

from the receiver.

If your receiver is not digital (example: older Dolby Pro Logic or stereo-only integrated amp) and/or you are using

the HIGH LEVEL INPUT speaker connections, you will use the CROSSOVER FREQUENCY CONTROL on the back

of your subwoofer's amp to set your crossover from your subwoofer. Change the CROSSOVER FREQUENCY CON-

TROL to higher and lower settings. If the crossover frequency is set too high, you'll start to hear low midrange

(voices and instruments) through it. This will negatively affect the stereo imaging of your main speakers. If this

occurs, lower the crossover frequency setting until you hear only bass from the subwoofer. If the crossover frequency

is set too low, you simply won't get much output from the subwoofer. As a starting point, if you are using left and

right tower speakers, set the CROSSOVER FREQUENCY CONTROL to 80 Hz, with bookshelf speakers to 100 Hz, and

with small mini speakers to 120 Hz.

c. PHASE SWITCH – Have someone change the PHASE SWITCH back and forth from 0º to 180º while you sit in

the main listening position. Leave the switch in the position where bass sounds most accurate and balanced.

9. After you are satisfied with the output of your subwoofer, you can make all your volume settings through your

receiver's volume control. The only time you might want to re-adjust the subwoofer amp's VOLUME CONTROL

is when you encounter a musical selection that has abnormally low – or high – bass.

INITIAL LISTENING TEST