Nakamichi NBT12A Instruction Manual

Installation: Mount the bass tube inside the trunk.
Decide the best location possible that suits your automobile and space available. The best and
most secure location for optimum sound quality is behind the rear seats, in the trunk floor.
To avoid difficult to heat dissipation, do not surround the unit, ensure the surrounding air
convection is smooth, it's much better for reduce the working temperature.
*Remark: It’s hard to avoid having a jolt or scram for automobile while running, be laying firmly
enough, suggest you use a bandage to fix the bass tube. (This bandage is not included, please buy
by yourself.) Please make sure the bass tube is tightly fixed.
Adjusting the sound level
Turn the level controls of the amplifier to their minimum positions. Choose music with high
dynamic content that you like, that you are familiar with and will be most often used in the system.
Turn the unit up to its highest undistorted output level. If you lack test equipment, this point
occurs between 3/4 to full volume depending on the quality of your source unit. Listen for any
audible distortion. If any distortion is audible, reduce the volume of the source unit until you have
an undistorted output. Leave the volume control at this position during your system tuning.
Continuous exposure to sound pressure levels over 100dB may cause permanent hearing loss.
High powered automotive sound systems can generate sound pressure levels in excess of 130dB.
When playing your system at high levels, please use heat protection and prevent long term
exposure.
Repair guide
Issues Causes Solutions
Supply the terminal in +12V.
Connect the supply in +12V.
No +12V on the remote.
Can't switch on No +12V on the supply.
the unit. Ground not properly connected. Check connections to ground.
Fuse broken. Change fuse.
The unitis on No signal. Check signal cable.
but no signal. Noremote. Check power on the remote.
Source level too high. Turn down the source level.
Distorted output, Gain of the amplifier too high. Turn down the gain of the amplifier.
Blown fuses. Output levels too high. Turn the level or gain down.
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www.nakamichicaraudio.com
NBT8A/10A/12A
BASS-REFLEX SUBWOOFER TUBE
Thank you for purchasing the Bass
Tube. For the secure installation and
perfect operation of your speaker,
please read and understand all
instructions before you use the
apparatus.
Thank you for purchasing the subwoofer tube. For the secure installation and perfect operation
of the product, please read and understand all instructions before you use the apparatus.
Precautions
The location must also be dry and well-ventilated.
The supply voltage requirement is 12V DC with the negative connection grounded. Please make
sure that the characteristics of your vehicle correspond with this requirement before connecting
the equipment.
For safe driving, we recommend that you operate your sound equipment at a listening level that
does not drown out traffic noise.
Warning]!
The performance of the NBT8A, NBTIOA and NBT12A allows high sound pressure levels to be
generated. We recommend that you adjust the level of your equipment correspondingly, keep
your car audio volume moderate so that you can still hear sounds outside your car.
For safety reasons, it is essential that you securely fix the bass tube enclosure in the boot (make
sure you do not drill through the petrol tank if you fix it with screws).
What's in the box
1. Bass tube (x1)
2. Installation connection manual (x1)
3. Mounting screw (x8)
4. Hexagonal wrench (x1)
* Accessories are subject to change without notice.
Technical specifications
Model
Woofer
Nominal power
Impedance
Frequency response
Sensitivity (SPL/1W/1m)
Subwoofer Magnet:
Power requirements
Power supply voltage
Bass tube dimensions
Gift Box dimensions
NBT8A
8"(210mm)
90W
4ohms
45-2.2kHz
90+ 2dB
120x60x20mm
5. Cable ties (x2)
6. Clips (x4)
NBTIOA
10" (256mm)
110W
4ohms
40-2.1kHz
90+ 2dB
120x60x20mm
NBT12A
12"(305mm)
130W
4 ohms
35-4.5kHz
91+2dB
140x60x20mm
12V DC car battery (negative ground)
14.4V (10.5V~16V)
18.9x9.4x10.0"
(480x240x255mm)
550x290x325 mm
% Design and specifications are subject to change without notice.
14.4V (10.5V~16V)
18.9x11.4x12.0"
(480x290x305mm)
550x340x360mm
© 1av HIGH POWER BASS AMPLIFIER
и
14.4V (10.5V~16V)
18.9x13.2x13.8"
(480x335x350 mm)
550x405x405mm
1. POWER(GND) must be connected to the chassis of your vehicle with a perfect electrical
connection (remove some paint to reveal bare metal if necessary) and with the ground cable.
2.+12V connect the +12V power supply of car battery with the power cable. (Note: power
connections)
3. REMOTE connect the electrical aerial output or the remote output of your radio with the remote
cable.
4. FUSE protects the unit from damage made by dangerous volume of current.
5. POWER INDICATOR LIGHT
6. LEVEL adjusts the input gain of the unit to accept different level of signal inputs.
7. CROSSOVER there are 2 optional modes for the crossover: FULL, L.P.F.
8.FILTER This is adjusting L.P.F frequencies. Controlls frequency of the amplifier between 40Hz and
250Hz.
9. INPUT(R) connect to the RCA output of the car radio with the RCA cable.
10. INPUT(L) connect to the RCA output of the carradio with the RCA cable.
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Installation connections
Panini E IO)
RCA cable
(Signal input)
Remote cable
Г à
GND +12V REM FUSE FULL L.PF
<,
=
H
dea | |° М М.
de —
IN
>
{95 TIR Л
& 12V HIGH POWER BASS AMPLIFIER
Ground cable \
Power cable +r a
Battery
Power Connections
*
=) e Fuse
©
=> LA
GND +12V| REM
to a metal point
of the car
a] To an accessory terminal
12V car battery
* Place the fuse in the power supply lead as close as possible to the car battery.