Atlantic Technology 8200 System Скачать руководство пользователя страница 16

Страница: 16 / 20

8200/6200 Pedestal Subwoofer System

Remote Control Functions

Satellite Level Setting Using an SPL Meter

When setting up a complete home theater we strongly recommend that
you use a Sound Pressure Level meter to calibrate the individual channel
levels. At the time of this writing Radio Shack® has one that is affordably
priced (approximately $40) and works well. However, for the best result
in setting up the levels and the parametric EQ you would be much better
served by using a true audio test instrument with a Real Time Acoustic
Analyzer (RTA) such as the Sencore® SP 295.
To calibrate channel levels using an SPL meter, turn on your system, put
the Processor/Receiver in the Test Mode and set its main volume con-
trol to a moderate volume level. If the volume control has a 0dB setting
with minus dB below and plus dB above 0, set the control to 0dB. Sit in
the prime listening position, set the SPL meter to the 70dB scale, Slow
Response, and C Weighting. Holding the meter in front of you with the
microphone pointed up at the ceiling, cycle the test tone from speaker to
speaker, setting every speaker (including the subwoofer) to 75dB using
the individual channel level adjustments in the Processor/Receiver. In
some cases, you may have to use the Processor/Receiver’s main volume
control to get the fi rst speaker you set (typically the left front) to 75 dB,
but from then on use the receiver’s internal level adjustments to set each
channel. These may only be accessible through the Processor/Receiver’s
remote control.
As tempting as it may be to set the subwoofer and/or surround speakers
higher than 75dB, don’t. Set them to 75dB and see if you can acclimate
to the sound as the fi lm maker created it. Try watching several different
movies and keep in mind that the goal is to have a system that sounds
like you’re actually in the movie. Just like in a well set up movie theater, in
most cases, you shouldn’t be consciously aware of the surround speaker’s
output at all, much less have so much bass that your furniture moves
across the room.
When using the latest discrete digital electronics we recommend setting
the subwoofer amplifi er’s BASS LEVEL control to its THX/REF posi-
tion and using the Processor/Receiver’s built-in subwoofer level control.
Should you have diffi culty achieving the correct subwoofer volume this
way or should your Processor/Receiver not have a subwoofer level adjust-
ment built in, you can use the subwoofer amplifi er’s main BASS LEVEL
control to make this adjustment.

Level Setting Without an SPL Meter

If you cannot use an SPL meter to calibrate the system try to set all the
speaker volumes to the same level using the Test Tones. Of course, this
will be much more diffi cult without the meter, especially for the sub-
woofer.

Setting the Subwoofer Level Without an SPL

Meter or Test Tones

Start your listening with the subwoofer LOW PASS control set at the cor-
rect crossover point (or in the THX/EXT position if you’re using a THX
Certifi ed processor or unit with a built-in crossover). Set the PHASE
control to 0

, and the front panel BASS LEVEL control to the THX/REF

position as shown to the left.

Play some music that
you know has good
bass content, and
turn the Processor/
Receiver’s level con-
trol up until you just

start to hear the subwoofer working. Now, from your normal listening
position, determine whether the subwoofer is playing loudly enough and
fi lling in the bass frequencies of the music evenly. If adjustment is neces-
sary, change the processor’s setting or use the front panel BASS LEVEL
control if your processor lacks a subwoofer level adjustment.

How Much is Enough?

Sometimes people prefer more bass impact for movies than sounds
natural when reproducing music. The PedWoofer amplifi er offers 4 EQ
settings plus the LEVEL TRIM to help maximize your enjoyment of dif-
ferent source material. Remember however, the most common error
people make when setting up their system is to play the subwoofer (and
surrounds) too loudly. Although the Home Theater Police will not arrest
you for this act, should you desire the most accurate overall reproduction,
a well-balanced sound from deepest bass to highest treble is the best way
to get it. Have fun. Experiment. Enjoy.

Remote Control Functions

There are 4 custom EQ settings that have been programmed into the Ped-
Woofer amplifi er (see graphs on back cover). These have been chosen to
enhance your enjoyment of both movies and music. These EQ settings
are fairly subtle in their effect, as we wanted to make them truly useful
with a wide selection of software. They can be accessed by pressing one
of the four EQ buttons on your Remote Control.

EQ1

- This EQ was primar-

ily designed to enhance music. It
reduces midbass frequencies by a
small, but noticeable amount. You
will fi nd that on many music sources
this will make the bass sound tighter
and more defined. It should make
individual bass notes easier to hear

as well. EQ1 can also be used to remove some overall bass boominess
when playing particularly bass heavy material.

EQ2

- This EQ was programmed to enhance the impact and punch of

special effects. It increases the bass output centered at 60Hz. Depending
upon the source material, EQ2 could also be used to add some warmth
to a bass shy music recording.

EQ3

- Another choice primarily intended to enhance movie and video

soundtracks. This one uses a more subtle increase of bass output cen-
tered at 80HZ with the addition of a very low frequency (subsonic) fi lter.
This gives you the option of punching up the mid-bass while at the same
time reducing the possibility of overdriving the woofers with extreme
low frequencies.

��