Nakamichi NBX30A Active Subwoofer Box User Manual
- June 13, 2024
- Nakamichi
Table of Contents
Nakamichi NBX30A Active Subwoofer Box
YOUR SUBWOOFER
Dear Customer,
Congratulations on purchasing our Nakamichi mobile system product for your
sound system. This product has been designed and manufactured to Nakamichi’s
exacting standards to ensure many years of audio enjoyment. For the best
performance, we recommend that you have your Nakamichi product installed by an
authorized Nakamichi dealer. If you would like to install this product on your
own, we recommend that you to go through this manual to familiarize yourself
with all the installation requirements and procedures. If you encounter any
issues or if you have any questions on the operation of this product, please
contact your nearest authorized Nakamichi dealer for assistance, or you may
also contact us through our website or social media channels.
Installation of your Product
In today’s modern vehicles, it is very easy to cause damage to existing
systems through improper installation. Please follow and scrutinize all wiring
diagrams to ensure that you have connected everything in its proper place. If
you find yourself uncomfortable of unfamiliar with understanding the wiring
and installation diagrams or testing instructions, do contact your nearest
Nakamichi dealer to perform the installation for you.
Safety Warnings and Considerations
- Clean only with a dry cloth or other similar materials.
- Install your product in a dry, well-ventilated location that does not interfere with your vehicle’s safety equipment.
- Do not block any ventilation openings when installing this product.
- Do not mount the product in the engine compartment of your vehicle or in any areas of extreme heat such as mufflers, silencers, exhaust pipes or other heat-producing apparatus.
- Securely mount the product so that it does not come loose in the event of a collision or as a result of repeated vibrations that might occur during normal operation.
- Installation of the apparatus must be done with great care to prevent damage to your vehicle’s fuel lines, power, and other electrical wiring, hydraulic brake lines, and other systems. If possible, always visit your nearest Nakamichi dealer to perform the installation.
- Do not run any wiring outside or underneath the vehicle. Keep all wires inside the vehicle.
- Take the necessary precautions when making connections to the vehicle’s battery to avoid any potential shock.
- Protect all system wires from sharp edges by carefully routing them, always use rubber grommets to protect wiring and cables whenever you are installing them through metal openings.
- Secure all wiring using cable ties or wire clamps to protect them from moving parts and sharp edges.
- This apparatus shall not be exposed to dripping or splashing, and no object filled with liquids shall be placed on the apparatus.
- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as the power input terminals are damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
- Fuses shall be replaced only with the correct type and fuse value, and only when the apparatus is powered off.
- Exposure to high sound pressure levels may lead to permanent hearing loss. Take every precaution to protect your hearing.
- This product is designed specifically for use with 12-volt, negative-ground electrical systems only. Using this product in systems with positive ground and/or voltages other than 12V may result in damage to the product and your system.
COMMON FAULTS & SOLUTIONS
| Issues | Causes | Solutions |
|---|
Can’t switch on the unit.
| 1. No +12V on the remote.
2. No+ 12V on the supply.
3. Ground not properly connected.
4. Fuse broken.
| l .Supply the terminal in+ 12V. 2.Connect the supply in +12V. 3.Check
connections to ground. 4.Change fuse.
The unit is on but no signal.| 1. No signal.
2. No remote.
| 1. Check signal cable.
2. Check power on the remote.
Distorted output.| 1. Source level too high.
2. Gain of the amplifier too high.
| 1. Turn down the source level.
2. Turn down the gain of the amplifier.
Blown fuses.| 1. Output levels too high.| 1. Turn the level or gain down.
ACCESSORY LIST
Check and identify the contents of your package:
- Subwoofer Box x 1 pc
- User manual x 1 pc
- Mounting Screw x 8pcs
- Sheet Iron x 2pcs
- Hexagonal Wrench x 1 pc
- High Levellnput Line x 1 pc
SPECIFICATIONS
- Subwoofer: 12″ (305mm)
- N-power: 150Watts
- MAX Power: 900Watts
- Sensitivity(dB/W /m): 90±3dB
- Unit Dimensions: 554×208/3 l Qx414mm
- Power Requirements: 12V DC Car Battery (Negative Ground)
- Power Supply Voltage Range: 14.4V (10.5V-16V)
- Frequency Response: 40Hz-3.5kHz Impedance: 40
- Voice Coil: ASV CD49.55mm
- Magnet Mass: 140x6Qx20mm
INSTALLATION
- 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.
- +12V connect the 12V power supply of car battery with the power cable.
- (Note: power connections).
- REMOTE connect the electrical aerial output or the remote output of your radio with the remote cable.
- FUSE protects the unit from damage made by a dangerous volume of current.
- POWER INDICATOR LIGHT
- LEVEL adjusts the input gain of the unit to accept different levels of signal inputs.
- CROSSOVER there are 2 optional modes for the crossover: FU LL L. P. F
- FILTER This is adjusting L.P.F frequencies. Contrails frequency of the amplifierbetween 40Hz and l 50Hz.
- INPUT(R) connects to the RCA output of the car radio with the RCA cable.
- INPUT(L) connects to the RCA output of the car radio with the RCA cable.
- REMOTE CONTROL Attach the included remote level contral to control the volume level of the subwoofer independently.
- HIGH LEVEL INPUTS If your head unit does not have RCA outputs you can use the speaker outputs for the audio source for the subwoofer.
LOW-LEVEL INPUT WIRING
Low-level (RCA) input wiring is preferred for best audio performance. Most
trunk and under-seat installations will require a 6-12 feet RCA cable. Always
use a high quality cable.
NOTE: Do not connect BOTH the high-level and low-level inputs from your receiver to your amplifier at the same time!
HIGH-LEVEL INPUT WIRING
The high-level input(s) should only be used when your receiver lacks RCA
outputs. If the RCA outputs are not present, connect the speaker outputs from
the receiver to the high-level input connector of the amplifier. Be sure to
observe polarity to avoid audio phase problems.
NOTE: Do not connect BOTH the high-level and low-level inputs from your receiver to your amplifier at the same time!
- Place the fuse in the power supply lead as close as possible to the car battery
Mount The Subwoofer Box Inside The Trunk.
- Decide the best location possible that suits your automobile and the 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, and ensure the surrounding air convection is smooth, it’s much better to reduce the working temperature.
- Remark: It’s hard to avoid having a jolt or scram for an automobile while running, be laying firmly enough, and suggest you use a bandage to fix the subwoofer box. (This bandage is not included, please buy by yourself.) Please make sure the bass tube
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 that 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 1 00dB may cause permanent hearing loss. High-powered automotive sound systems can generate sound pressure levels in excess of 130 dB. When playing your system at high levels, please use heat protection and prevent long-term exposure.
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