K&K Sound Powermix Pure User manual

92798 Cape Arago Hwy, Coos Bay, OR 97420 | 541-888-3517 | Toll Free 1-800-867-6863 | kksound.com
POWERMIX PURE SYSTEM
PREPARATION AND PICKUP INSTALLATION
Please familiarize yourself with the installation
manuals for the FanTaStick undersaddle transducer
and the Pure bridgeplate pickup. (You can disregard
the paragraphs regarding the endpin jack.)
1. First, install the FanTaStick according to its
manual.
2. Place the PowerMix 2-Channel Preamp, the
volume control element, and the battery holder
through the sound hole inside your guitar. Place
them out of the way for now.
3. Next, install the Pure pickup according to its
manual.
ENDPIN JACK INSTALLATION
1. Unscrew the endpin jack's strap knob.
2. Take off the nut and washer.
3. Find out the thickness of your end block and set
the nut on the cap accordingly (see picture
below). Once in place, screw the cap against it
to secure the nut.
4. Insert the jack from the inside into the endpin
hole. Tip: A chopstick or something similar will
help you get a hold of the jack to pull it through
the hole.
5. Attach the outside washer and nut and tighten.
Attach the strap knob.
6. Note: Make sure that the strap knob screws in
ALL THE WAY over the outer threaded part of
the jack, so that a tiny portion of the thread is
exposed when the strap-knob is tightened.
POWERMIX PURE PREAMP
This preamp features 3-band EQ plus a gain control
for each individual channel. These controls are
called “trim pots.” They can be adjusted with a
small, long screwdriver.
The EQ trim pots are in linear position (no cut or
boost) when the white arrow points to a center
position. Please keep in mind that the midrange
trimmers, as opposed to the bass and treble
trimmers, are oriented 90 degrees clockwise
The gain trimmers set the degree of pre-
amplification on the input of the circuit. They act like
volume controls but if they are set too high,
distortion may occur. (Note: The lowest
(counterclockwise) setting does not shut the channel
off. It is the lowest available gain setting.) We
recommend you use the gain trimmers to balance
the two channels so that when you turn both
thumbwheel volume controls to full, you have each
channel at your maximum desired volume. From
there you can blend the two channels in any way
you desire.
We factory preset these trimmers, but this setting
will likely not perfect for your guitar. Feel free to
adjust the trimmers in any way you like. (Tip: Keep
written records of the settings you like.) The
preamp’s EQ and gain should be set to fit your
guitar and style. Once you found your settings, you
may never have to touch the controls again. Use the
EQ on your amp or PA to compensate for different
room acoustics.
Please unplug the endpin jack from the guitar to
switch the battery off.

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92798 Cape Arago Hwy, Coos Bay, OR 97420 | 541-888-3517 | Toll Free 1-800-867-6863 | www.kksound.com
ADJUSTING THE PREAMP
The PowerMix System comes with a long blade
precision screwdriver to adjust the trim pots on the
preamp board. It also includes a sticker that
describes the thumbwheels and the trim-pots
function which you should attach somewhere inside
your guitar case.
The photo below shows EQ settings on the preamp
board that we recommend as a starting point.
Please look closely at the white indicator arrows in
the center of the trim pots.
Undersaddle channel:
•boost bass (ca 2.30 o'clock on the little white
arrow indicator)
•cut mids all the way left
•cut treble (arrow indicator ca 9 o'clock)
•gain ca 11 o'clock
Pure Pickup channel:
•bass and treble almost flat (arrow indicator 12
o'clock)
•cut mids all the way left
•gain ca 3 o'clock
This is only a starting point. We try to set the gain
trimmers so both pickups are about equally loud
when the according thumb-wheel is full up.
At a performance we generally recommend to use
as much Pure Pickup as possible and then add
undersaddle sound as desired.
INTERNAL PREAMP INSTALLATION
The preamp is attached with a self-adhesive Velcro
fastener. For convenient access, it is best to mount
the preamp directly under the sound hole. This
allows for quick access to the EQ trimmers with a
long, small blade screwdriver.
If you do not want to stick Velcro directly to the label
of the guitar, we recommend this temporary
mounting technique: Use the supplied 6” strip of
Velcro and trim the length and the protection paper
as shown in the photo. Usually there is about 3 ¼”
(85mm) distance between the 2 braces. Please
measure your guitar and trim accordingly. Stick one
Velcro-end to one brace, pull the strip tight and stick
the other end to the next brace. Now you can
temporarily attach the preamp to this strip.
If you prefer, you can keep the preamp attached in
this way. It is actually quite sturdy. However, once
you are done with your sound adjustments you can
move the preamp to another location, deeper inside
the guitar.
INSTALLING THE BATTERY HOLDER
Please install the battery holder to the neck-block
with its self-adhesive Velcro fastener. To change
batteries we recommend you remove the entire
holder, change the battery comfortably under the
sound hole, and re-attach it to the neck-block.