K&K Sound Bass Master Pro User manual

92798 Cape Arago Hwy, Coos Bay, OR 97420 | 541-888-3517 | Toll Free 1-800-867-6863 | kksound.com
BASS MASTER PRO SYSTEM
This state of the art double bass system combines a
four-head piezo transducer with a wing mount
system and a dual-channel preamp.
The four-head transducer component harmonizes
very well with jazz bass because its transmission
band includes very high and very low frequencies.
The high frequency transmission ensures a clean
amplification of the finger attack of the picked bass.
The low frequency amplification refers to the
desired “bassy” sound picture.
The wing mount transducer consists of two piezo
elements in layered sandwich design. It provides
rich harmony reproduction for both arco and
pizzicato playing. Its sound characteristics display a
more pronounced mid range and thus perfectly
complete the ideal double bass sound spectrum.
The third component of the system is the dual
channel preamplifier. Each transducer component
can be adjusted individually. The convenient belt
clip unit allows fast access to the external volume
controls. The unit also provides internal sound
adjustment with trim pots: Bass and treble controls
+/-20 dB as well as gain for both channels
separately. This allows customized adjustment for
each instrument.
INSTALLING THE PICKUPS
The Quad-Head Bridge Pickup
Attach the pickup discs with the double-sided
adhesive tape provided, following the supplied
instructions. Attach the pickup heads in the spaces
underneath the strings, facing the fingerboard (see
photo).
Make sure that the cables between the pickup and
the jack do not touch the instrument or they could
cause vibration disturbance. If you have to remove
a pickup disc, do not pull it off by the wire or bend
the transducers. This will void the warranty! Use a
sharp knife with a thin blade and rub off the old
adhesive with your thumb.
The Wing pickup
You can attach the wing transducer on either side of
the bridge. We recommend trying the low string (E
string) side first. If the slot is too narrow, DO NOT
FORCE THE PICKUP INTO THE SLOT! YOU WILL
BREAK THE PIEZO CERAMIC ELEMENT AND VOID
THE WARRANTY! For the right fit, you may have to
remove some material from the lower part of the
bridge. You’ll achieve best results with a snug fit. If
the slot is too big, please insert some cardboard or
veneer to build it up.

2
JACK INSTALLATION
Clamp the jack with its mounting plate between the
A and D string behind the bridge (see illustration,
right).
PREAMP ADJUSTMENT AND FINAL SETUP
Install a 9-volt battery in your preamp in the
designated space. Remove the snap-off lid. There is
no need to undo any screws to remove the lid, it
simply snaps off. Important: Please do not tamper
with the screw on the bottom of the preamp!
There is a diagram on the inside of the lid with the
internal tone and gain controls. In the box you will
find a little screwdriver for the adjustment of the
trimpots. Connect the supplied stereo cable from the
pickup into the preamp input. Plug the preamp into
your amplification system at a linear setting.
Now adjust the gain with the trimpot of each
individual channel until both pickups are equally
loud. Adjust the bass and treble trimpots to your
preference. Close the box and you are ready to go.
Unplug the output cable at the mixer after usage to
shut off battery!
Channel 1: Wing Transducer
Channel 2: Quad/Bridge Transducer
TECHNICAL DATA
Four-Head Transducer: 3/4" Head Diameter
Wing: 22 mm Diameter / Thickness 5 mm
Preamp Dimensions: 3" x 3.5" x 1"
Input Impedance: 1 MegOhm
Output Impedance: 10 KOhm
Input: Stereo ¼”
Output: ¼”
Power: 9-volt battery
Supplied with Stereo Connection Cable
All K&K products are designed, assembled and
packaged in USA using mainly US and European
components. Thanks again for choosing K&K.