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Your Cali bass features an internal, high-quality, dual-channel headphone amp, allowing you
to have unrestricted practice with a full, complete, and accurate tone, anytime, anywhere,
without disturbing anybody around. The usage of modern, energy-saving components
and a highly-efficient lithium-polymer battery, along with a user-friendly charging system
altogether extend the period over which the amp may be used, thus making the instrument
available in several different scenarios.
Switching on the headphone amp
The headphone amp is switched on with the use of a two-way toggle mini-
switch in the front of the instrument. The active status of the headphone amp
is signaled by the first blue LED on the left, turning on, labeled PREAMP ON.
Details on the switch settings and LED indications placed on the electronics
cover on the back of the instrument can be found in further sections of the
present manual.
Volume and Tone Adjustment
The Cali bass features 4 potentiometer knobs. The first one is used to adjust the output
signal level (Volume knob). It is then sent out to the 1/4" instrument, and the 1/8" headphone
output jacks. The headphone out has no separate volume knob, and one volume control knob is
used for both outputs. The second knob is used as a mid-control for the active EQ. Knobs three
and four are stacked on a single potentiometer, allowing for adjusting the treble and bass on
the active EQ.
Plugging In Stereo Headphones
The headphone amp can only work with stereo headphones fitted with a 1/8" (3.5 mm)
TRS jack plug. Headphones with impedance ranging from 16 to 64 Ohms are acceptable. In the
case of stereo headphones with a different plug, a proper adapter shall be used. Headphones
and adapters shall be purchased separately. One shall not use mono (TS jack) headphones or
headphones with an embedded microphone with a 1/8" (3.5 mm) jack with this instrument.
OMTP, CTIA, or similar TRRS jack plugs are also not usable with this bass.
One shall note that the Cali mini bass is not a stereophonic instrument. For that reason, both
channels of the headphones (left and right) transmit the very same, monophonic pick-up signal
that is only split between the two channels of the headphone amp.
Note:
For safety and comfort reasons, the headphones shall be plugged into the instrument only after
the headphone amp is switched on, with the volume knob set to a minimum (extreme left position).
Mayones Cali Bass – User Manual
Using the Headphone Amp
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