Nakamichi NBX30A 12" Active Subwoofer Box User Manual
Model: NBX30A
Brand: Nakamichi
Introduction
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, it is recommended to review this manual to familiarize yourself with all the installation requirements and procedures. For any issues or questions regarding the operation of this product, please contact your nearest authorized Nakamichi dealer for assistance, or contact Nakamichi through their website or social media channels.
Installation of Your Product
In today's modern vehicles, improper installation can easily cause damage to existing systems. Please follow and scrutinize all wiring diagrams to ensure that you have connected everything in its proper place. If you are uncomfortable or unfamiliar with understanding the wiring and installation diagrams or testing instructions, please 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. |
1. 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 1pc
- User manual x 1pc
- Mounting Screw x 8pcs
- Sheet Iron x 2pcs
- Hexagonal Wrench x 1pc
- High Level Input Line x 1pc
Specifications
- Subwoofer: 12" (305mm)
- N-power: 150 Watts
- MAX Power: 900 Watts
- Sensitivity (dB/W/m): 90±3dB
- Unit Dimensions: 554×208/310×414mm
- Frequency Response: 40Hz-3.5kHz
- Impedance: 4Ω
- Voice Coil: ASV Ф49.55mm
- Magnet Mass: 140×60×20mm
- Power Requirements: 12V DC Car Battery (Negative Ground)
- Power Supply Voltage Range: 14.4V (10.5V~16V)
Installation Diagram and Connections
The rear panel of the NBX30A subwoofer box features several connection points and controls:
- 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 the 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: Indicates when the unit is powered on.
- 6. LEVEL: Adjusts the input gain of the unit to accept different levels 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. Controls frequency of the amplifier between 40Hz and 150Hz.
- 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 car radio with the RCA cable.
- 11. REMOTE CONTROL: Attach the included remote level control to control the volume level of the subwoofer independently.
- 12. 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. This connection involves running an RCA cable from the car radio's RCA outputs (labeled R and L) to the NBX30A's INPUT(R) and INPUT(L) terminals, along with a remote cable from the car radio's remote output to the NBX30A's REM terminal. The NBX30A's +12V terminal connects to the car battery's positive terminal via a power cable with an inline fuse near the battery. The NBX30A's GND terminal connects to a metal point on the car's chassis.
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. This connection involves running speaker wires from the receiver's speaker outputs (labeled R+, R-, L+, L-) to the NBX30A's HIGH LEVEL INPUTS. The NBX30A's +12V terminal connects to the car battery's positive terminal via a power cable with an inline fuse near the battery. The NBX30A's GND terminal connects to a metal point on the car's chassis. The remote cable connects from the car radio's remote output to the NBX30A's REM terminal.
NOTE: Do not connect BOTH the high level and low level inputs from your receiver to your amplifier at the same time!
Mount The Subwoofer Box
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 heat dissipation, do not surround the unit; ensure the surrounding air convection is smooth, which is much better for reducing 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 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 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.
Connect With Us Online
Connect with Nakamichi online to explore their complete range, instructions, software downloads, and warranty registration.
Website: www.nakamichicaraudio.com
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Nakamichi Corp, Japan. Made in China | 中國製造.
