Nakamichi NBX20A User Manual
8" ACTIVE SUBWOOFER BOX
Dear Customer,
Congratulations on purchasing your 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, Nakamichi recommends that you have your Nakamichi product installed by an authorized Nakamichi dealer.
If you wish to install this product yourself, this manual provides all the necessary installation requirements and procedures. If you encounter any issues or have questions regarding the operation of this product, please contact your nearest authorized Nakamichi dealer for assistance, or reach out via Nakamichi's website or social media channels.
Installation of your Product
In today's vehicles, improper installation can easily damage existing systems. Please follow and scrutinize all wiring diagrams to ensure correct connections. If you are uncomfortable with wiring and installation diagrams or testing instructions, contact your nearest Nakamichi dealer for installation.
Safety Warnings and Considerations
- Clean only with a dry cloth or 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 or in areas of extreme heat such as near mufflers, silencers, or exhaust pipes.
- Securely mount the product to prevent it from coming loose due to collisions or vibrations.
- Install the apparatus with care to prevent damage to your vehicle's fuel lines, power and electrical wiring, hydraulic brake lines, and other systems. If possible, have a Nakamichi dealer perform the installation.
- Do not run any wiring outside or underneath the vehicle; keep all wires inside.
- Take precautions when connecting to the vehicle's battery to avoid potential shock.
- Protect all system wires from sharp edges by carefully routing them, using rubber grommets for openings in metal.
- 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 liquid-filled objects should be placed on it.
- Refer all servicing to qualified service personnel. Servicing is required if the apparatus is damaged, liquid has been spilled, objects have fallen into it, it has been exposed to rain or moisture, it does not operate normally, or it has been dropped.
- Fuses shall be replaced only with the correct type and value, and only when the apparatus is powered off.
- Exposure to high sound pressure levels may lead to permanent hearing loss. Take precautions to protect your hearing.
- This product is designed for 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. | 1. Supply the terminal with +12V. |
| 2. No +12V on the supply. | 2. Connect the supply with +12V. | |
| 3. Ground not properly connected. | 3. Check connections to ground. | |
| 4. Fuse broken. | 4. Change fuse. | |
| The unit is on but no signal. | 1. No signal. | 1. Check signal cable. |
| 2. No remote. | 2. Check power on the remote. | |
| Distorted output. | 1. Source level too high. | 1. Turn down the source level. |
| 2. Gain of the amplifier too high. | 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 1pc
- User manual x 1pc
- Mounting Screw x 8pcs
- Sheet Iron x 2pcs
- Hexagonal Wrench x 1pc
SPECIFICATIONS
- Subwoofer: 8" (203mm)
- N-power: 100Watts
- MAX Power: 600Watts
- Sensitivity(dB/W/m): 88±3dB
- Unit Dimensions: 452×165/237×303mm
- Frequency Response: 35Hz-3.5kHz
- Impedance: 4Ω
- Voice Coil: ASV Ø38.55mm
- Magnet Mass: 126×60×20mm
- Power Requirements: 12V DC Car Battery (Negative Ground)
- Power Supply Voltage Range: 14.4V (10.5V~16V)
INSTALLATION
Diagram Description: The diagram shows the rear panel of the Nakamichi 12V High Power Bass Amplifier with numbered connection points and controls.
- POWER(GND): Must be connected to the vehicle's chassis with a perfect electrical connection (remove paint to reveal bare metal if necessary) and with the ground cable.
- +12V: Connect the +12V power supply from the 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 caused by dangerous current volume.
- POWER INDICATOR LIGHT
- LEVEL: Adjusts the input gain of the unit to accept different levels of signal inputs.
- CROSSOVER: Offers two optional modes for the crossover: FULL, L.P.F.
- FILTER: Adjusts L.P.F frequencies, controlling the amplifier's frequency between 40Hz and 250Hz.
- INPUT(R): Connect to the RCA output of the car radio with the RCA cable.
- INPUT(L): Connect to the RCA output of the car radio with the RCA cable.
Diagram Description: This diagram illustrates the wiring connections for the Nakamichi amplifier. It shows the remote cable connecting to the head unit and the amplifier, the RCA cable for signal input, and the ground and power cables connecting to the car battery and chassis. The power connections detail how to connect to the battery, an accessory terminal, or an ignition switch for power.
* 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 that suits your automobile and space. The best and most secure location for optimum sound quality is behind the rear seats, in the trunk floor.
- To aid heat dissipation, do not surround the unit; ensure smooth air convection to reduce working temperature.
- Remark: It can be difficult to avoid jolts or scram for automobiles while running. Laying the box firmly is suggested, possibly using a bandage to fix it (bandage not included, purchase separately). Ensure the bass tube is clear.
Adjusting The Sound Level
- Turn the level controls of the amplifier to their minimum positions. Choose music with high dynamic content that you like and are familiar with, as this will be most often used in the system.
- Turn the unit up to its highest undistorted output level. If test equipment is unavailable, this point is typically between 3/4 to full volume, depending on the source unit's quality. Listen for audible distortion. If distortion is present, reduce the source unit's volume until undistorted output is achieved. Maintain this volume setting during system tuning.
- Continuous exposure to sound pressure levels over 100dB can cause permanent hearing loss. High-powered automotive sound systems can generate sound pressure levels exceeding 130dB. When playing your system at high levels, use hearing protection and avoid long-term exposure.
Further Information
SCAN OUR QR CODE OR VISIT WWW.NAKAMICHICARAUDIO.COM FOR COMPLETE AUDIO SETTINGS INSTRUCTIONS.
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Made in China | 中國製造
