K&K Sound GOLDEN TRINITY User manual

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GOLDEN TRINITY SYSTEM
The following Golden Trinity Systems are available:
•Golden Trinity Bass Max System
•Golden Trinity Double Big Twin System
•Golden Trinity Upgrade System
Each of the above systems include the Golden
Bullet URB Microphone, three conductor string
mounted jack, connecting cable, and the Golden
Trinity Dual Channel Preamp, which powers the mic
and provides complete EQ and volume for each
channel.
The Golden Bullet URB Microphone is a condensor
microphone chosen specifically for its performance
with the double bass. We selected this mic in
cooperation with double bass specialists because it
combines great sound with excellent feedback
resistance. It is unidirectional to help avoid rumble
and undesirable bleed from other instruments.
Amazingly light and small, it is mounted on the
bridge using a special Velcro self-adhesive fastener
and positioned using its six inch gooseneck.
The Golden Trinity Dual Channel Preamp is a
compact, 10 oz preamp (dimensions: 3 x 3 ½x 1 3/8)
that provides power to the microphone and gives
you complete control over the volume and EQ for
each channel.
PICKUP INSTALLATION
A separate instruction manual is enclosed for the
systems with integrated pickup. Refer to it for the
installation and operating instructions for that
particular transducer system.
MICROPHONE INSTALLATION
The mic is supplied with a piece of dual-lock (similar
to Velcro) for mounting on your bridge. Cut a piece
from the supplied dual-lock (the same length as the
folded piece attached to the mic gooseneck) and,
leaving the adhesive backing piece in place, attach
it to one side of the dual-lock on the mic.
Since each bridge is different, the best placement
requires some experimenting. You may wish to
place the adhesive piece on the inside or on the
bottom of the leg of the bridge. Before you remove
the protective strip, use both hands to temporarily
hold it in place and adjust the mic gooseneck.
Once you have found the best location, remove the
protective strip and press the adhesive against the
bridge. The bridge surface should be clean and
clear of any rosin for the best results. Our testing
has shown that a good location for the mic is on the
G-string side of the bass, with the mic at an angle
towards the F hole, as shown in the photograph.
Directly aiming at the sound hole is not
recommended. Of course, the gooseneck allows you
to try a wide range of positions.
Note: Tight bass cases may catch on or move the
mic. If necessary, you may wish to place another
piece of dual-lock elsewhere on your bridge to

2
temporarily relocate the mic when you pack the
bass.
JACK INSTALLATION
Put the mounting plate between any two pairs of
strings as shown in the illustration. Make sure all
cables are placed so they do not vibrate against the
bass or each other.
CONNECTING THE SYSTEM
A single wire leads from the microphone to a 3-
conductor (TRS, Stereo) string mounted jack. A 12-
inch lead with a standard ¼” phone plug comes
from the jack and should be plugged into your
pickup's output jack. The supplied 3 conductor
stereo cable carries the separate mic and pickup
signals to the preamp for mixing.
SETTING UP THE PREAMP
Remove the snap-off lid and insert a new 9-volt
battery. There is no need to undo any screws, the
lid simply snaps off. Important: Please do not
tamper with the screw on the bottom of the
preamp!
There is a diagram of the controls inside the lid. The
tiny trim pot controls can be adjusted using the
small screwdriver conveniently supplied inside the
preamp. The mic channel has internal bass and
treble trimmers and the pickup channel has bass,
mid, and treble trimmers.
Some set-up time and patient experimentation will
give you the best results. We recommend that you
either have someone else play your instrument, or
position the speaker close to your ear for precise
listening; it is virtually impossible to accurately set
controls if you are hearing the acoustic sound from
your bass.
The two gain trimmers are designed to let you
equalize the volumes of both the mic and preamp,
so the external volume controls positions give you
the same amount of volume in the same positions.
This preamp is very powerful; if you get distortion
from overloading your amplifier’s input, reduce the
gain trimmer level.
Each channel has tone controls; they have a very
wide +/-20db range. Use a light touch, because a
tiny tweak can make a dramatic change. Make small
adjustments as necessary. After you find the best
settings, we recommend you leave the settings in
place and make adjustments at your amplifier to
compensate for new stage and room conditions.
The preamp has two output jacks. The MAIN output
is a mix of both the mic and pickup channels. The
MIC output carries only the mic signal.
TECHNICAL DATA
Preamp: 3"x3.5"x1.25"
Pickup channel input impedance: 1 MegOhm
Output impedance: 10K ohms
Input: Stereo 1/4"
Outputs: 1/4"
Power: 9-volt battery
Supplied with stereo connecting cable