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Power
Handling
The power output rating for any amplifier
that is connected to the Bigfoot should not exceed the cabinet's
500 Watt power handling capacity.
Speaker
Cable
Only SPEAKER CABLE of 18 gauge or heavier
(The heavier the cable, the lower the gauge) should be used
to connect your amplifier to the Bigfoot. Do not use shielded
instrument cable to connect your amplifier to your speaker enclosure,
as this can result in intermittent power loss, cause your amp
to oscillate and damage itself and/or your speakers, and render
the cable useless for any purpose.
Full
Range Input and Output Jacks
The Bigfoot features three, full range
input/output jacks (two standard 1/4" and one banana) wired
in parallel. If you are running two speaker enclosures in parallel,
connect the speaker cable from your amplifier to the 1/4"
jack labeled “IN”, and a second speaker cable from
the 1/4" jack labeled “OUT” to the input of the
second speaker enclosure.
Please
Note: Only one amplifier at a time can be connected to the Bigfoot.
DO NOT plug two amplifiers into one speaker enclosure, as it
will not work and can damage your system.
Tweeter
Attenuator Control
The large dial found on the input panel
of the cabinet is the Tweeter Attenuator Control. This control
is used to adjust the level of high frequency signal present
at the horn/tweeter. A normal setting for this control is straight
up or “twelve o’clock”. Turning the dial fully
counter-clockwise removes the tweeter from the circuit. As you
turn the dial clockwise from this position, the high frequency
content is increased.
Please
Note: Any amplifier clipping that occurs will be accentuated
by the tweeter. If you hear a distorted signal through your
tweeter and fear that it has been damaged, turn down the master
volume of your amplifier to see if the distortion remains present.
Another common “false alarm” that can be misinterpreted
as a horn defect can occur when a string on your instrument
is struck with enough force to hit the pickup. This can cause
a loud clacking sound, once again, emphasized by the high frequency
circuit.
Internal
Crossover
The internal (passive) crossover of the
Bigfoot divides the incoming signal into two frequency bands.
The crossover point is 5 kHz (frequencies above 5 kHz are sent
to the tweeter, frequencies below 5 kHz are sent to the 12"
speakers.)
Tweeter
Protection Circuit
The Bigfoot's tweeter protection circuit
features an 18 watt, 24 volt light bulb that is in series with
the tweeter. Under normal conditions the bulb is cool. As you
begin to overload or put more power into the tweeter, the bulb
begins to light and increases in resistance, limiting the voltage
going to the horn. At high power levels, you may notice intermittant
light coming from behind one of your speakers. This means that
the protection circuit is doing its job and quite possibly you
should turn down the attenuator knob. A sudden burst of feedback
or a heavily clipped waveform can cause the bulb to open - just
like a fuse.
If
no sound is coming from the tweeter, check the position of the
Tweeter Attenuator Control. If it is set above the fully counter-clockwise
position, check the bulb on the interior of the input panel.
This can be done by removing the four outermost wood screws
securing the input panel to the enclosure. Do not remove any
other screws on the input panel. After the four wood screws
have been removed, gently lift out the input panel assembly.
The bulb will be in plain sight and should be checked by visually
inspecting the filament. The bulb should be clear (ie: no dark
residue on its interior) and the filament should extend without
a break between its two ends. If the filament is broken, it
will be necessary to replace the bulb. Replacement bulbs are
manufactured by companies such as Sylvania, Phillips, and Wagner
and are available at nearly all auto parts stores and gas stations
(where they are generally sold as auto "dome lights").
The part number for the replacement bulb is 211-2. If you have
difficulty finding the correct bulb, please contact the SWR
Service Department at (818) 253-4797.
Speaker
Protection Grill
The custom-manufactured steel grill was
installed to protect the Bigfoot's speakers from puncture or
other physical damage. Prior to shipping, the grill mounting
screws are tightened to a point where they firmly hold the grill
in place and are free from rattle. Should the screws loosen,
some rattling may occur. If this happens, simply tighten the
screws until they become snug. Do not over tighten the screws
as this could bring the grill too close to the speakers and
cause interference with the speaker cones.
Cleaning
and Maintenance
A stiff brush (such as those available
in the cleaning section of most super markets) can be used to
keep the cabinet's carpeting free of lint, pet hair and dust.
Should you encounter a problem with the carpet collecting odor
(from smokey clubs, etc...) a common carpet cleaner can be used,
but it is recommended that you test whichever brand you choose
on a small, inconspicuous area on the underside of the enclosure,
prior to spraying down the entire covering in order to prevent
any discoloration or other problem. All screws on the baffle
and input panel should be checked periodically for tightness,
so as not to become loose (causing rattles or air leaks) or
lost.
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