Introduction
The Nakamichi NDSK4265AU is a Digital Sound Processor (DSP) designed for car audio systems, offering advanced audio tuning capabilities. This user manual provides comprehensive information on its features, installation, operation, and software control.
Notice
To prevent the risk of short circuits, keep the device away from water, liquid, and wet areas.
If water or any other liquid enters the device, cut off power immediately and contact the nearest service center for inspection.
There are no user-serviceable parts inside the device; contact the nearest service center for any repairs or servicing.
The surface temperature can exceed 80°C under prolonged loads; install the device in a safe location.
Troubleshooting
Ensure all cables are securely connected before turning on the power.
Common troubleshooting procedures:
- If a fault occurs, follow the instructions below for commonly encountered problems.
- If issues persist after following suggestions, reset the unit to factory settings.
- If issues persist after factory reset, contact the nearest service center.
| No. | Malfunction | Reason and Solution |
|---|---|---|
| 1 | No Power | A. Check the power connection B. Check the ACC connection |
| 2 | No Sound | A. Is it in mute mode B. Have you selected the correct input channel |
| 3 | Unable to connect USB | A. Check the USB connection B. Check if the driver "HID-compliant device" has been installed in your PC |
Accessory List
- Amplifier - 1pc
- User Manual - 2pcs
- USB2.0 Cable (1.5m) - 1pc
- Installation Bracket - 2pcs
- Self-Tapping Oval Head Screws (4x20mm) - 2pcs
- Cross Head Mechanical Screws (3x8mm) - 4pcs
- Velcro - 2sets
Product Technology Data
| Product Data | |
|---|---|
| Dynamic Range (RCA Input) | ≥100dB |
| S/N (RCA Input) | ≥90dB |
| Frequency Response | 20Hz~20KHz |
| Input Impedance | High Level Input: 51Ω |
| Low level Output Impedance | ≤100Ω |
| Signal Input | RCA INPUT: 8Vpp; High Level: 26Vpp |
| Output Range | RCA Output: 7Vpp; N-power Output: 4x30W; Max power: 4x60W |
| Working Temperature | -20~70°C |
| Power | DC9V-16V |
| REM Input | High Level Input Signal: FR+/FR- or ACC control cable |
| REM Output | +12V Startup Voltage Output |
| Standby Power | ≤0.1W |
| Gross Weight | Approx. 0.7kg |
| Box Dimension (LxHxW) | 174.5x120x40mm |
All specifications subject to change without notice.
Technical Sheet
| Details | |
|---|---|
| Input Signal Type | 4 Channels high level, 2 Channels low level, supports internal Bluetooth and USB music playback. |
| Output Type | 6 Channels low level, 4 Channels high level |
| Output Gain | Gain range: Mute, -59dB~6dB |
| Output Signal EQ | 31-band EQ for every channel. 1. Frequency Range: 20Hz~20KHz, 1Hz Accuracy 2. Q value (Slope): 0.404~28.852 3. Gain: -12.0dB~+12.0dB, 0.1dB Accuracy |
| Output Signal Crossover | Equipped with high and low pass filters. 1. Professional filter type: Butter-w, Bessel, Link-Ril 2. Filter Crossover Point: 20Hz~20kHz, Resolution 1Hz 3. Filter Slope Setup: 6dB/Oct~48dB/Oct |
| Output Phase and Time Alignment | Adjust phase and time alignment for every output channel: In Phase or Out Phase (0°-180°); Time Alignment: 0.000 to 20.000 milliseconds, 0 to 692 cm, 0 to 273 inches. |
| Presets | Save 6 presets into the device. |
Dimensions and Installation
Dimensions (Unit: MM)
The device has the following dimensions: Width: 174.5 mm, Height: 120 mm, Depth: 40 mm.
Installation Instruction:
The rear panel features various connection ports including PC, REM, USB, AUX-L, AUX-R, CH1-CH6 OUTPUT, HIGH/ACC INPUT, and speaker terminals. An optional wiring controller, AC3, can be connected for enhanced control.
[Description of rear panel layout: Ports are clearly labeled for PC, REM, USB, AUX-L, AUX-R, CH1-CH6 OUTPUT, HIGH/ACC INPUT, and speaker terminals (FL+, FL-, FR+, FR-, RL+, RL-, RR+, RR-, GND, +12V, REM, ACC). The front panel has a USB port and indicator lights.]
Panel Controls and Features
The front panel of the Nakamichi NDSK4265AU features several key controls and ports:
- A. PC PORT: Connects to the computer tuning software. Driver installation is automatic when connected to the computer sound software.
- B. REMOTE LEVEL CONTROL PORT: Connect the included remote level control to independently adjust subwoofer volume.
- C. USB PORT: Insert a USB drive to play music from the connected audio source.
- D. AUX LOW LEVEL OUTPUT PORT: Low-level RCA input for left and right signals.
- E. AUX LOW LEVEL OUTPUT PORT: Low-level RCA output for up to 6 channels.
- F. POWER INDICATOR LIGHT: Indicates the power status of the device.
- G. MACHINE START MODE SWITCH: Select between "ACC" terminal for ACC start or "HOST" terminal for high-level input signal start.
- H. HIGH LEVEL INPUT AND OUTPUT PORT: Terminals for high-level speaker connections (e.g., FL+, FL-, FR+, FR-, RL+, RL-, RR+, RR-, GND, +12V, REM, ACC).
Important Notes:
* '+' indicates the positive electrode; '-' indicates the negative electrode.
* Use the special wire for the original car or define external wiring material by yourself.
* Before connecting power, ensure the power supply meets the device's requirements and connect according to instructions to avoid damage or accidents.
PC Software Introduction
The PC software for tuning can be downloaded from the official Nakamichi website (http://www.nakamichicaraudio.com, Downloads).
Computer Configuration Requirements: Screen resolution higher than 1280 x 768 is recommended for full UI functionality. The software is compatible with Windows operating system laptops, desktops, and tablets.
Main Menu Edit Section: The software provides features for Memory, Option, Mixer, and Audio settings.
- Memory: Load or save machine preset scenarios, or load/save scene files to/from your computer.
- Options: Select language (Chinese/English), configure noise gate, view "About" information, and restore factory settings.
[Description of PC Software Interface: The software displays an EQ PASS interface with controls for channel selection (CH1-CH6), high-pass and low-pass filters, gain, frequency, and Q value adjustments. It also includes a 31-band graphic equalizer (GEQ) with sliders for gain adjustment across various frequencies. Buttons for Reset EQ, Restore EQ, and volume controls for each channel are visible.]
Mixer Interface: Allows mixing of different input sources (Analog1-4, Bluetooth, USB) with individual channel volume and routing controls.
Channel Equalizer Editing Area: Provides detailed control over the 31-band equalizer for each channel, including frequency, Q value, and gain adjustments. High-pass and low-pass filters can also be configured.
Output Channel Adjustment Area: Allows adjustment of phase (0°/180°), volume, mute status, and delay for each output channel. Output configuration can be reset, and left/right channels can be linked.
Main Volume Adjust Zone: Controls the main volume with a range from -59dB to +6dB, and includes a mute function.
Smartphone Software Introduction
The Nakamichi smartphone app can be downloaded from the official website (http://www.nakamichicaraudio.com, Downloads).
Main Interface (Home): Allows sharing sound effects, saving/opening audio effects, viewing model/version information, and exiting the software. It supports storing and recalling 6 sets of preset scenes.
- A. Connection Status: Indicated by color (Black: not connected, Red: connected).
- B. Scene Preset: 1-6 presets available for output delay adjustment.
- C. Audio Source Selection: Options include Bluetooth, Analog, and USB.
- D. Volume Adjustment: Main volume (0-66) and subwoofer volume (0-60) can be adjusted. Medium, high, and low volume ranges are -12dB to +12dB. A speaker button mutes the master volume.
- E. Menu: Access output channel adjustment, equalizer, mixing mode, system settings, and music playback.
Channel Interface: Configure channel selection, volume, mute, phase (forward/reverse), high/low pass filters, and joint tuning.
Mixer Interface: Manage Bluetooth/USB and analog inputs, with mixing options and adjustment range from 0-100.
EQ Interface: Adjust output channel EQ curves (gain, Q, frequency). Options include reset, parametric, and graphic equalization modes. High-pass and low-pass filters can be set with various types and slopes.
System Interface: Restore factory settings, configure noise gate (0-22), set modes (PR1-PR6), and enable local sound effects.
Music Interface: Play music from USB, Bluetooth, or Level-H sources. Controls include play/pause, next/previous track, loop modes, and random play. Song and folder names are displayed.
[Description of Smartphone App Screens: The app displays distinct screens for Home, Output, and Mixer. The Home screen features large rotary knobs for volume and selection. The Output screen shows channel-specific controls like volume, mute, phase, and delay. The Mixer screen allows routing and balancing of different audio sources.]
Connect With Us
Explore Nakamichi's complete range, instructions, and software downloads, and register your warranty online.
Website: www.nakamichicaraudio.com
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Nakamichi Corp, Japan. Made in China | 中國製造
Nakamichi Mobile Audio Systems – Nakamichi Car Audio
