5
Master Volume
Normally set at 5-8. If you are playing quietly and input levels are within the normal range, you can
adjust the master volume for quiet amplifier operation. Higher numbers 5-10 allow maximum
headroom, but produce more pre-amp “hiss”. Higher settings should be used in loud band situations.
Master Low Bass
The low bass master control provides boost/cut at 50 Hz. These frequencies are important for
reproducing sounds such as grand piano and Organ. Low frequencies use a lot of power and can
muddy up your sound when a bass player is in the mix. Use only enough to get the sound you areafter.
XLR Line Outputs
Left and right channels are output for feed to mixing boards. The XLR line outputs will work very
well in most venues. If there is a very large difference in ground potential between the KP-500SN and
the mixing board in use, you may need to use transformer isolation or “ground float” boxes to
eliminate noise. Many older buildings can have ground problems. Check AC outlets to prevent shock
and to ensure proper KP-500SN grounding. Volume, expand and EQ affect XLR output signals.
Slave Output
Outputs left and right audio from the master volume control to a slave amplifier. The connector is
standard “midi” style for convenience in obtaining cords but does not send midi data. The cord must
use all five conductors. You can use several slave amplifiers, take just the right amount of power to a
venue, and always have stereo 3D sound! Play next to a Guitar stack? No problem!
Subwoofer Output
¼ unbalanced, 300 mv rms, 12 db oct @ 300 Hz. This output is used for bass or sub-woofer
augmentation of the KP-500SN, such as with a
Motion Sound SW-15 Subwoofer
. Set the bass
control on the KP-500SN at 5 or lower and let your external bass amplifier handle the lows. The KP-
500SN will then have full power available for mid and high frequencies. Using the subwoofer output
does not disable those frequencies from the KP-500SN.
Maintenance
Finish: Clean with mild soap and water if needed. No other maintenance is necessary.
Speakers: Remove screws from the grill cover and remove the grill. The 12” speakers are mounted
from the front with screws into steel inserts. The horns are mounted from the rear with screws and
nuts. Wires from the amplifier to the 12” speakers and ferro cooled dynamic horns are removable
spade types. If you change speakers, use 8 ohm only.
Amplifier: The entire amplifier chassis is mounted from the rear outside. Remove all screws on top
and around the back of the amplifier chassis. You must remove the speaker wires from the front
(remove 12” speakers first) before the amp chassis can be entirely removed.
