The Guitammer Company BK-LFE, Руководство пользователя

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Integration into Your Sound System
Power
The ButtKicker
®
is a passive load and therefore requires
its own dedicated audio power ampli Þ er. Suggested
minimum required power is 400 watts. The use of 14
gauge speaker cable between the ampli Þ er and the
ButtKicker is recommended. For cable runs over 25 feet,
12 gauge speaker cable is recommended.
Low End Roll Off
When choosing a power amplifier other than the
ButtKicker Power Ampli Þ er (BKA1000-4), please be
aware of the low frequency response of the ampli Þ er.
Many manufacturers roll off, or cut frequencies below
20 Hz, usually because anything below 20 Hz has
been considered unusable and damaging for speaker
systems. Therefore, amplifier manufacturers often
include additional circuitry to reduce or eliminate those
damaging “unusable” signals before they are ampli Þ ed
and sent to the speaker. This roll off of low frequencies
(also called “Low Cutoff” or “Hi Pass” Þ lters) is not best
for the ButtKicker, although a shallow roll off can be
tolerated (i.e. –1.5 dB to –3 dB at 10 Hz). A full cut
at 20 Hz and below is not acceptable because it will
severely limit some of the remarkable qualities of the
ButtKicker. You should Þ nd frequency response listed
among the ampli Þ er manufacturer’s speci Þ cations.
Source Material
The ButtKicker responds to a broad range of bass
frequencies, including those far below what we hear,
or deep down into the feeling range of sound. Today’s
digital sound sources (DVD’s, MP3’s, etc.) are capable
of carrying signals down to 5 Hz, but it is the producers
who determine the content of a sound track. Therefore,
the level and range of bass contained within any given
sound track will vary. Even though a DVD may show
the launch of a rocket, the audio track will contain only
what the producers chose to include in the audio track.
The ButtKicker responds accurately to the existing low
frequency content, much as a subwoofer responds to
the signal given it.
Page 3
Integr
ation into Y
our Sound S
ystem
Floating Wood Floors
The surface below you is your physical connection to
your environment. A suspended, joist ß oor is an ideal
mounting surface for the ButtKicker
®
. Best results are
obtained by installing two 2” x 6” boards between two
ß oor joists (Figure 6). Place them near the center of
the room, or near the seating area of the audience,
avoiding any supports and bracing that would not allow
the ß oor to move. Then mount the ButtKicker to the
two 2” x 6” boards.
An alternative method is shown in Figure 7. Here, a
2” x 6” board is attached broadside across the bottom
edge of three joists.
Chairs and Couches
When properly installed to your couch or chair the
ButtKicker will provide excellent low frequency sound
reproduction without excessive midrange vibrations. If
possible, we recommend using rubber isolators on the
bottom of your furniture’s legs (or as a replacement
for the legs) to better isolate the furniture from the
ß oor.
Platforms and Risers
Many home theaters have more than one row of seats,
with the second and third rows built upon risers. These
risers, for ButtKicker applications, have two purposes:
raise and support the seats and occupants, and allow
vertical platform and seat movement.
The ButtKicker can be mounted above or below the top
surface of the riser. If above, consider people traf Þ c
and furniture placement. If under the surface, some
simple framing can be done to avoid the extra room
Page 8
Mounting Consider
ations
Figure 7 Figure 6