12
SP-8000 Subwoofer Preamplifier
13
Instruction Manual
Operation & Troubleshooting
is less sensitive at the frequency extremes (deep bass and very high
sounds). In order to compensate when you must play the system at lower
volume levels, EQ4 has been designed to raise the overall bass output of
the sub slightly. The result will be a fuller and richer sounding bass at low
volumes. EQ4 is designed for both music and movies. It can also be used
to help compensate for lack of bass at the listening position.
REF
- This resets the EQ to flat response and the also resets the volume
trim to 0dB.
LEVEL TRIM and MUTE
- The
and
buttons let you
change the total output level of
your subwoofer to compensate for
soundtrack variations and your per-
sonal preferences. Each push of the
button results in a 1dB change above or below the preset reference set
with the BASS LEVEL control. The LEVEL TRIM readout on the ampli-
fier indicates the level of adjustment in dB.
Pressing the MUTE button turns off the volume of the Subwoofer. Press-
ing it again returns the volume to its previous setting.
Direct Access Connector
Located on the rear panel, this port and the corresponding male plug
(shipped installed in the port) is for use with a hard wired remote control
system using electronic or mechanical switching. Each contact function
is labeled. To access the control functions use a normally open connec-
tion. Momentary closure will activate each function. The LEVEL TRIM
function will respond in 1dB steps to a single contact closure while con-
stant closure will result in continuous steps to the maximum of ± 10dB.
The REF EQ and REF volume reset functions each have their own set
of contacts.
Care of Your SP-8000
The preamplifier can be wiped with a clean, dry cloth. If necessary, you
can clean the front panel with a soft cloth moistened with mild window
cleaner or dampened
slightly
with water.
IMPORTANT: SAVE YOUR BOXES!
If you can do so, save the car-
ton, packing pieces and plastic bags that came with your SP-8000.
They will be useful in case you move or have to ship your system
for any reason. In any case, save all packing materials until you are
certain that the system has suffered no damage in shipment. If you
find such damage, either visible or internal, contact your dealer
immediately for the proper return procedure.
Troubleshooting Guide
Once your Preamp is set up, you should have many years of maintenance
free enjoyment from your system. However, if you should encounter a
problem, refer to the following guide to help find the solution. If the prob-
lem persists, please contact your local authorized Atlantic Technology
dealer.
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Problem
Possible Cause
Possible Solution
No bass output
AC power cord unplugged or
Plug into a working outlet.
plugged into a non-working outlet.
Input cables not securely
Check all connections, then try another
connected or defective.
input cable.
Audible buzz or hum
Input cable not securely connected
Check all connections, then try another
or defective.
input cable.
Ground loop through antenna or
Test by disconnecting antenna and/or cable
cable TV system input.
system input leads. If hum goes away, install
isolation balun(s) at that point.