Mayones Musashi User manual

MUSASHI - ACTIVE BASS PREAMP WITH A 3-BAND EQ
NITŌRYŪ 2.0 - STEREO HEADPHONE AMPLIFIER + AUX INPUT
Quick Start Guide
Tone
Treble Middle
Balance
Volume
0% 100%
B-50%
N-50%
B-100%
N-0%
Bass
B-0%
N-100%
–+
0
–+
0
+
–
Passive EQ
B - Bridge
N - Neck
PUSH-PULL
Active/Passive
Your new Mayones bass now features Musashi acve onboard preamp with a three-band EQ developed at Mayones,
based upon years of R&D and consulng efforts, involving leading musicians all around the world. The preamp provides the user
with a broad adjustment range in the low, mid, and high frequencies, while the operaon profile is opmized for bass pickups.
The whole system of electronics features many unique soluons boosng the levels of instrument funconality.
The presence of an embedded Nitoryu 2.0 stereo headphone amp with stereo AUX input is one of the key features as
such. It allows the user to plug in a signal coming from an external device, such as a smartphone.
Knob funcons
Volume – Pickups volume adjustment for preamp and headphone amp (push-pull funcon for acve/passive mode)
Middle – ±13 dB cut and boost at 730 Hz (default seng)
Treble – ±20 dB cut and boost at 18 kHz
Bass – ±14 dB cut and boost at 22 Hz
Switching the Preamp Power On
The power switch is integrated with the 1/4-inch output jack. The preamp is turned on
once the user plugs in the 1/4 inch jack to the input socket, and this is also signaled by
a blue LED being turned on, on the backplate, designated ON.instrument 1/4"
output socket
The headphone amp can only work with stereo headphones fied 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.
AUX In - Line Input
It includes PHONES output, and an extra stereo line input (AUX IN). That elevates the
levels of instrument usability and allows one to play the bass with its true tone virtually
anywhere, without disrupng anyone's peace of mind. One should note that the output
signal of the Musashi Nitōryū preamp is sent to the headphone amp input. For the acve
seng, the EQ will have an impact on the tone one hears in the headphones.
This 1/8-inch stereo jack is used to plug in a line-level stereo input, from an external source - a smartphone, tablet,
CD player, metronome, and so on.
Plate with two 1/8 inch inputs — Stereo Headphone Amp
Balance – Signal blender, between the two pickups
Tone – True passive tone control
(works in acve and passive mode)

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.
All content including specifications, data, and illustrations in this manual are subject to change without
prior notice.
No part of this document may be reproduced or transmitted in any form by any means, electronic,
mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher.
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 2023
Built-in Baery, Charging Indicators and Baery Meter
The baery charge level can be checked with the use of a meter on the
backplate. The meter includes four LEDs and a CHECK buon that allows for
momentarily checking the baery charge levels. Aer pressing that buon,
depending on the charge level, one, two, three, or all four LEDs would light up.
Baery Charging
To charge the internal baery, use the supplied charger. The USB type C
charging port has been placed next to the LED controls on the electronics cover, on
the backside of the instrument. Aer the charger is plugged into the USB type C
charging port and the mains socket, the charging process begins and the the first yellow LED (CHARGING) lights up. When
the baery is fully charged, the yellow charging LED switches off other green LED (labeled FULL) lights up.
Alternave Power Source - 9V Baery (only preamp)
The Musashi preamp may also be powered by a typical 9V alkaline baery (6LR61 or 6F22). One should emphasize the
fact that solely the preamp can be powered with the use of a 9V baery. In such a case, there is no opon of using the
headphone amp. The 9V baery compartment is located in the back, next to the electronics cover. When a 9V baery is
used, the power source should be switched manually. For that purpose, a mini slide switch is used - placed on the
electronics cover, designated SOURCE. The switch has two posions, an upper one (ACCU), and a lower one (9V).
How to Switch the Headphone Amp On?
The headphone amp is turned on aer headphones are plugged into the 1/8" (Phones) stereo out. The "on" status for
the headphone amp is signaled by a blue LED on the backplate - designated "ON".
Note: The headphone amp works regardless of whether the instrumental cable is connected to the output 1/4" jack.
• The 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 baeries above 60°C (140°F).
• Never charge the convenonal non-rechargeable baeries. The baeries can
explode or the electrolyte may leak out causing fires, damage, or injury.
• When installing the baery, take close noce of the polarity (plus/minus [+/-])
and install it accordingly in its compartment. Reversed posion of the baery
may lead to an explosion or leak of the electrolyte, causing fire, damage or
stains around the baery.
• When storing or disposing of the baeries, secure the baery terminals with
electrical tape or similar means of protecon, to make short-circuit impossible
(involving other cells or metal objects).
• When disposing of cells that have been worn out, follow the recommendaons
on them, general recommendaons, and the general law regulaons in force.
• Do 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 baery.
• Do not store the baeries together with small metal objects. These objects may
cause a short-circuit, thus creang electrolyte leak, explosion, or other issues.
• Do not heat up or dismantle the baery cells. One should not throw the cells
into the fire or water. This could potenally lead to leakages, explosion, cause
fire or cause injuries or damage, or stains around the baeries.
• If electrolyte leak occurs, carefully remove the baery cell from the compart-
ment, before inserng 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 quanty 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 quanty of clean water, then consult your doctor.
• When inserng or replacing the baery, unplug the instrument from any
other device.
• If you plan not to use the instrument over a longer period, please remove the
baery 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.
Important Usage Informaon on the Li-Poly / Li-Ion Baery
The product uses a lithium polymer cell. This type of baery is safer than its Li-Ion counterparts since the risk of electrolyte spilling has been eliminated.
Exposure to loud sounds over a long period may lead to hearing damage and permanent hearing impairment. According to the general recommendaons,
we'd like to ask you to follow the values listed below, when it comes to maximum me one may spend in locaons with a specific sound level.
Following those recommendaons is not expected to result in hearing damage.
• 90 dB SPL - Up to 8 hours • 95 dB SPL - Up to 4 hours • 100 dB SPL - Up to 2 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
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.
The full version of the user manual
can be downloaded at:
mayones.com/musashi