Mayones Cali Series User manual

USER
MANUAL

- 2 - Mayones Cali Bass – User Manual
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Dear Bass Player!
Mayones Cali is a very functional instrument. Apart from its incredible acoustic properties
and playability, it also offers professional tone - both when used with a typical bass amp, as well
as in practice situations, thanks to its internal headphone amp (Cali HS model). Cali mini bass
is a professional instrument that can be placed on par with a regular bass. It may also be
a highlight at live shows, used for a distinctive solo, or featured in arrangements written
specifically for its unique short scale voicing.
Cali comes with electronics in two versions: Standard and HS.
The Standard Cali bass features an embedded active three-band-EQ preamp that provides
the player with a broad range of tone adjustments in the bass, mids, and treble bands.
Mini-switch in this model allows the user to bypass the preamp completely, thus making the
instrument completely passive.
Cali HS tone control is all passive, however, its major advantage comes in the form of
a dual-channel headphone amp.
If you are looking for something more sophisticated, then we have prepared the Cali VFret
model that has a varied scale for each of the strings (17.1" - 18.3" multiscale), a tilted pick-up
and bridge comprising out of individual modules for each of the strings. Cali VFret is being
offered solely in the active version with a three-band EQ.
Note:
The present instruction manual constitutes an addendum to the basic version of the
Mayones Electric Bass Manual. The manual you are holding complements the basic manual
within the scope of the specific design and usability features of the Cali bass. The aforesaid
instruction manual can be downloaded from the www.mayones.com website.
IMPORTANT SAFETY NOTICE
LISTENING TO THE SOUND AT LOUD VOLUMES MAY LEAD TO
A PERMANENT HEARING DAMAGE.
THE VOLUME SHOULD ALWAYS BE SET TO THE LOWEST USABLE LEVEL.
Exposure to loud sounds over a long period may lead to hearing damage and permanent hearing
impairment. According to the general recommendations, we'd like to ask you to follow the values listed
below, when it comes to maximum time one may spend in locations with a specific sound level. Following
those recommendations is not expected to result in hearing damage.
• 90 dB SPL - Up to 8 hours 95 dB SPL - Up to 4 hours
• 105 dB SPL - Up to 1 hour • 110 dB SPL - Up to 30 minutes • 115 dB SPL - Up to 15 minutes
•120 dB SPL — avoid levels so high, risk of loss of hearing occurs
IMPORTANT!
Be especially careful when using earphones or headphones plugged into the instrument, as sounds
of very high volume may appear and these could lead to permanent hearing damage.
• • 100 dB SPL - Up to 2 hours

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Elements of the Cali HS bass
10
11
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17
18
19
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21
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1
2
3
4
5
6
7
8
9
12
13
15
16
23
1. Headstock
2. Tuners
3. Truss rod adjustment screw and
truss rod adjustment screw
cover for setting the neck relief
4. Neck nut
5. Strings
6. Frets
7. Fingerboard
8. Front strap pin
9. Fret markers
10. Pickup
11. Pickup height adjustment
screws
12. Bridge saddle
13. Bridge
14. Tailpiece
15. Rear strap pin
16. Electronics compartment cover
17. Passive volume knob
18. Passive tone knob
19. Mini switch, setting the mode
20. 1/8" Headphones output jack
21. 1/4" Instrument output jack
22. Status and headphone amp
charging LEDs
23. Micro-USB charging port
Mayones Cali Bass – User Manual

General Information on Using the Instrument
Most of the set-up procedures applicable to the Cali bass are the same or very similar to
conventional bass guitars. The above stems from the use of full-size components, identical to the
ones used in other Mayones basses. This provides you with the very same Mayones signature
sound that comes together with top quality, perfect playability, a broad range of set-up
adjustments, reliability, and longevity of both the instruments, as well as of its components.
Strings
Cali 4 is tuned one octave higher than a typical 4-strings bass guitar (G , D, A, E ).
high low
By default, Cali comes with the following string gauges: 0.30-0.44-0.63-0.84 inch. They are cut
to the length that corresponds with the 17.1" (436 mm) scale. In practical terms, the length of
the strings should not be greater than 10 centimeters, from the tuner pegs, to which they
would be attached, with a prior attachment of the strings to the tailpiece.
Depending on the individual preferences and strings availability on the local market, one
may experiment and use strings of different gauges (±0,03" when compared to the stock
strings set), use of different tunings may also be a possible option. One should note that usage
of much thicker strings could create a necessity to introduce relevant setup adjustments.
This may also require a luthier to customize the instrument, for instance, to adjust the neck nut
slots width.
Neck relief: Truss rod adjustment
To maintain an optimal level of playability and for the bass to remain stable throughout
its scale, a truss rod has been used in the Cali bass that is applied to set the neck relief. The truss
rod adjustment nut is located beyond the neck nut and it is protected by a decorative
cover. The adjustment process is identical to a typical bass guitar.
Recommended neck relief, measured above the 8th fret after the string is fretted at the first
and last fret, should be set at the level of 0.3 mm for each of the strings.
Action
When the recommended neck relief has been set, it is recommended that distance between
the strings and the top of the 12th fret is, respectively, around 1.3 mm for the G string and
ca. 1.5 mm for E.
Note:
A detailed description of all of the individual set up and usage procedures can be found in our
instruction manual for bass guitars that can be downloaded at the www.mayones.com website.
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Mayones Cali Bass – User Manual

Using the Headphone Amp
Your Cali HS bass features an internal, high-quality headphone amp, allowing you to have
unrestricted practice with a full tone, anytime, anywhere, without disturbing anybody around
you. The headphones output also gives the user an extra capability to plug the bass
directly into a vast selection of audio devices (via the AUX input) and to record or play along
a backing track. Usage of modern, energy-saving components and a highly-efficient Li-Ion
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 many different scenarios.
Switching on the headphone amp
The headphone amp is switched on with the use of a three-way toggle
mini-switch in the front of the instrument, alongside the headphone output.
This integrated switch also makes it possible for the user to select the active or
passive mode for the 1/4" output jack. Switching on the headphone output is
signaled by illuminating the first blue LED on the left, labeled PREAMP ON.
Details on the switch settings and LED indications can be found in further
sections.
Volume and Tone Adjustment
Cali HS features two control knobs. The first one is used to adjust the pickup output signal
level (volume knob) that is sent to the 1/4" instrument output jack and 1/8" headphone
output. The second knob is a typical passive TONE control.
Plugging In Stereo Headphones
The headphone amp can only work with stereo headphones with impedance ranging from
32 to 64 ohms, fitted with a 1/8" (3.5 mm) TRS jack plug. In the case of stereo headphones with
a different plug, a proper adapter should be used. Headphones and adapter should be
purchased separately. Do not use mono (TS jack) headphones or headphones with the
embedded microphone with 1/8" (3.5 mm) jack with this instrument. OMTP, CTIA, or similar
TRRS jack plugs are also not usable with this bass.
Please note that Cali bass is not a stereophonic instrument. For that reason, both channels
of the headphones (left and right) transmit the very same, monophonic pickup signal that is only
split between the two channels of the headphone amp.
Note:
For safety and comfort reasons, the headphones (or other audio devices) should be plugged into the
instrument only after the headphone amp is switched on, with the volume knob set to minimum
(extreme left position).
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DISCHARGED
PREAMP ON
FULLY CHARGED
CHARGING
Mayones Cali Bass – User Manual

Switch Positions
When the switch is in its lower position, only the 1/4" output jack is active, transmitting the
passive pickup signal (passive mode). The instrument may be plugged into a typical bass amp
with the use of a conventional instrument cable. The operation of the volume and tone
knobs is identical as in the case of a typical bass guitar with passive electronics. When the
switch is in the lower position, the 1/8" output jack is not active.
In the middle position, the passive signal is sent to the 1/4" output jack (passive mode),
however, the headphone amp is turned on as well, and the signal is sent to the 1/8"
headphones output. In this position, we can use the headphones as well, or we may send the
signal from the 1/8" jack output to a sound recorder for instance.
Important:
When the switch position changes (from the lower position to the middle one), the power is supplied
to the headphone amp. The headphone output may then emit a loud signal that can damage your
hearing or the hardware plugged in. For that reason, the headphones (or other devices) should be
plugged only after the headphone amp is switched on, with the volume knob set to the lowest
setting.
When the switch is in the upper position, the signal is sent to the active preamp, with the EQ
also being active - and then, after the signal passes through the EQ, it is sent to the output. 1/4"
Jack (active mode). In this position, low- and high-end are a bit more pronounced which makes
the tone more dynamic, selective with a little more punch.
When the switch is set in this position, the 1/8" jack is also active.
Mini-switch Position
Instrument 1/4
output jack
"
Headphone 1/8"
output jack
Lower
ON, passive mode
OFF
Middle
ON, passive mode
ON
Upper
ON, active mode
ON
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Mayones Cali Bass – User Manual

Battery charging
The headphone amp is powered by a Li-Ion battery of high
efficiency and capacity, allowing the user to play the
instrument for many hours without any problems, and without
worrying about discharging the battery. Four LEDs indicate the
battery charge levels and they also provide information on
the status of the headphone amp. They are placed on the cover
of the electronics, on the backside of the instrument.
When the battery is discharged, the red LED, the second
one from the left, labeled as DISCHARGED, is flashing.
Should you get the discharged battery indication, you should
charge it as soon as possible.
To charge the internal battery, use the supplied charger that
provides optimized charging parameters. The micro USB
charging port has been placed next to the LED controls on the
electronics cover, on the backside of the instrument. Due to its
small dimensions and the delicate nature of the micro-USB
port and the charger plug, one should be very cautious when
plugging the charger in and during the charging process.
In no circumstances use excessive force when plugging the charger in, or when removing
its plug. Should any issues occur there, inspect the status of the plug and the charging input
carefully. The imput should be clear from any objects and dirt. Do not use the charger if the
plug, or any other part of the charger, has been damaged. In no case should you use force to
remove the cable. You should not remove the plug at an angle as well.
After the charger is plugged into the micro-USB charging
port and the mains socket, the charging process begins. This is
shown by a continuous light that is emitted by the first red LED
on the right (CHARGING). Should you be charging the battery
after it has been depleted completely, the charging time would
last around 6 hours.
When the battery is fully charged, red charging LED
switches off and the other green LED (labeled FULLY
CHARGED) begins to flash. Even though the applied charging
module features overcharging protection, it is recommended
to unplug the charger when the battery is fully charged for
safety reasons. You may also just unplug the charger at any
moment of the charging process. You may also leave it plugged
in. However, this entails a risk of damaging the charger socket
and the plug if we forget that the instrument is plugged in.
DISCHARGED
PREAMP ON
FULLY CHARGED
CHARGING
DISCHARGED
PREAMP ON
FULLY CHARGED
CHARGING
DISCHARGED
PREAMP ON
FULLY CHARGED
CHARGING
DISCHARGED
PREAMP ON
FULLY CHARGED
CHARGING
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Mayones Cali Bass – User Manual

The instrument comes together with a universal EURO plug charger that may be powered
by voltages ranging from 110 to 240V @ 50 - 60 Hz. Should you use the charger in areas where
no socket compatible with the Euro plug is available, a proper adapter should be applied (one
should purchase an adapter as such separately).
When the battery is being charged, one can use the headphone amp. However, in circum-
stances as such the charging would take longer. It is recommended that the battery is charged
with the headphone amp turned off.
When, after the charger is plugged in, the red charging LED does not light up, nor does the
green LED become active, this may mean that your charger, charging cable, or charging port
has been damaged, or that the cable is plugged in improperly, or that the battery is unplugged.
In the worst-case scenario, the above symptoms may mean that the headphone amp has been
damaged. In a situation as such, try unplugging and plugging in the charging cable.
Alternatively, you could also use another compatible charger, or take out and reinsert the
battery. The battery voltage should not be lower than 2.5V. If the value is lower, then this may
mean that the battery has been damaged.
Note:
It is not recommended to plug Cali into the PC USB port, as most of these ports do not provide
current that has proper charging parameters for the battery applied.
Tip:
The internal battery may also be charged with the use of an external power-bank providing
5V/1A charging power. To provide a full charge, at least 5000 mAh power bank is required.
The power bank could be used as an alternative charging unit in places where no mains access
is available. It is also possible to use another charger that has output parameters equivalent to the
charger that comes with the instrument (5V, 1A) and has been fitted with a micro USB plug.
In exceptional circumstances, one may remove the battery from its compartment and charge
it in an external dedicated 18650 3.7V Li-Ion battery charger.
Important!
The micro-USB port is used solely for charging the battery. It is not used as an audio output.
Headphone Amp – How long can I use it on a single charge?
When the battery is fully charged, with 32 Ohm stereo headphones being plugged in, you can
use the headphone amp for around 26 hours, with comfortable playing volume.
Note:
Do not leave the mini-switch in the middle or top position - when the switch is in these positions,
power is supplied to the headphone amp. This may lead to a rapid discharge of the battery.
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Mayones Cali Bass – User Manual

Battery Operation - Remarks
18650 Li-Ion batteries are becoming increasingly more popular on the market. The option
of quickly removing the battery also allows the user to quickly replace it, thus allowing him/her
to use the headphone amp in a manner that is continuous and seamless. Having a spare 18650
battery at hand, along with an external charger, may make it much easier to use the headphone
amp, should you have limited or no access to the mains.
If we are not going to use the headphone amp for a longer period (a month or longer), it is
recommended to charge the battery and then remove it from the instrument. The battery
should be stored in a dry and safe place, away from heat sources, with the battery terminals
being protected from accidental short-circuit.
Note:
The headphone amp may only be powered by the 3.7V 18650 Li-Ion battery. Using any other cell
may damage the headphone amp, or even lead to an explosion of the battery which may
consequently cause fire and/or injury.
Other Applications of the Headphone Amp
When you are not using the headphones, apart from using the standard 1/4" TS jack
instrument output, the headphone output may be used to transmit the signal to an additional
receiver - a sound recorder, effects, monitors, or extra stereo amp. Make sure that the coupled
device can safely receive the headphone output signal. Should a need emerge, the output level
can be adjusted with the bass’s volume knob.
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Mayones Cali Bass – User Manual

Important Usage Information
on the Li-Ion Battery
The product uses a Li-Ion battery cell. Improper use may lead to electrolyte leaks, rupture,
or other issues. When using the battery, closely follow the recommendations below.
źThe cells may explode or release toxic substances into the environment. There is a risk of
fire or burns. Do not open, crush, modify, dismantle, burn or heat the batteries above
60°C (140°F).
źNever charge the conventional non-rechargeable batteries. The batteries can explode or
the electrolyte may leak out causing fires, damage, or injury.
źWhen installing the battery, take close notice of the polarity (plus/minus [+/-]) and install it
accordingly in its compartment. Reversed position of the battery may lead to an explosion
or leak of the electrolyte, causing fire, damage or stains around the battery.
źWhen storing or disposing of the batteries, secure the battery terminals with electrical tape
or similar means of protection, to make short-circuit impossible (involving other cells or
metal objects).
źWhen disposing of cells that have been worn out, follow the recommendations on them,
general recommendations, and the general law regulations in force.
źDo not use any other cells than the one specified in the present manual. In any other case,
there is a risk of fire or electrolyte leakage. This may lead to a fire, damage, injury, or emergence
of stains around the battery.
źDo not store the batteries together with small metal objects. These objects may cause
a short-circuit, thus creating electrolyte leak, explosion, or other issues.
źDo not heat up or dismantle the battery cells. One should not throw the cells into the fire or
water. This could potentially lead to leakages, explosion, cause fire or cause injuries
or damage, or stains around the batteries.
źIf electrolyte leak occurs, carefully remove the battery cell from the compartment, before
inserting a new one. If the electrolyte enters your eyes, it may cause sight loss. In cases as
such, you should immediately rinse your eyes with a major quantity of clean water, without
rubbing the eyes, and then you must contact a doctor immediately. If the electrolyte gets
in contact with skin or clothes it may cause skin damage or burns. Should this happen, wash
the irritated area of the skin with a large quantity of clean water, then consult your doctor.
źWhen inserting or replacing the battery, unplug the instrument from any other device.
źIf you plan not to use the instrument over a longer period, please remove the battery cell.
In extreme cases it may explode, the electrolyte may leak out, fire or damage may occur,
or stains may be formed by the leak.
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Mayones Cali Bass – User Manual

Specification of the Headphone Amp
Control (passive): 1 × Volume knob
1 × Tone knob
Frequency response: 20 Hz – 20 kHz
Power: 2 × 50 mW @ 32 Ohm
THD+N: >120 dB
Output jack: 1/8" (3.5 mm) TRS
Recommended headphones impedance: 32 ÷ 64 Ohms
Amp operating period: Ca. 26 hours @ 32 Ohm
Mode switch: 3-position mini-switch (power switch)
LED operation/charge
status indicators: (4) on the electronics cover on the back-side of the
instrument
1 – Blue – Headphone amp on
2 – Red, blinking – battery discharged
3 – Green, blinking – battery fully charged
4 – Red – charging
Amp power supply: 18650 Li-Ion battery, 3.7 V, 3400 mAh
Battery charging socket: micro USB
Charging voltage: 5 V
Charging current: 1 A (minimum)
Charging time: around 6 hours (5 V, 1 A)
Battery protection: overcharging and deep discharging
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Battery Disposal
The battery in the instrument is recyclable. Please treat is as hazardous waste and
return it to the seller or the battery recycling point. To protect the environment you
should only dispose of batteries that are discharged and completely depleted.
Mayones Cali Bass – User Manual

Find more information on guitar operation and maintenance and solving basic problems on our website
www.mayones.com.
Mayones Guitars and Basses care constantly about the quality of their instruments and release their
newer and upgraded versions, as well as search for the best possible building materials.
All parts of the instruments are RoHS compliant.
The company reserves the right to make changes without prior notice.
Mayones and the Mayones logo are registered trademarks of Gitary Mayones s.c.
Gitary Mayones s.c.
ul. Narwicka 10
80-557 Gdansk, Poland
Tel. [phone] [email protected] www.mayones.com
© Gitary Mayones 2020