Nakamichi NDS4615AU Digital Sound Amplifier User Manual
- June 6, 2024
- Nakamichi
Table of Contents
NDS4615AU Digital Sound Amplifier
User Manual
INTRODUCTION AND TROUBLESHOOTING
Thank you for your purchase and welcome to the world of Nakamichi! Please keep
your original proof of purchase or invoice in a safe place in case of any
warranty claims. Do
also, mail or register your warranty with the official Nakamichi service
centers and/or agents to ensure that you are provided with the relevant
technical support if required.
NOTICE
- To prevent short circuits, please keep the device away from water or damp places.
- If water or any other liquid enters the device, cut off the power immediately, and inform the nearest Nakamichi Service Center or Agent to inspect the product.
- Users are not recommended to disassemble the device as there are no user-serviceable parts inside, please contact the nearest Nakamichi Service Center if necessary.
TROUBLESHOOTING
Ensure all cables and parts are securely connected before turning on the power. Shown below is the basic troubleshooting procedure that you should follow.
Troubleshooting method:
| No. | Malfunction | Reason and Solution |
|---|---|---|
| 1 | No Power | •Check the power connection and make sure it’s secure. |
•Check the ACC connection and make sure it’s secure.
2| No Sound| •Double check if the unit is in MUTE mode.
•Check if you have chosen the correct input channel.
3| Unable to connect through USB| •Check the USB connection and make sure it’s
secure.
•Check if the driver “HID-compliant device” has been properly installed on
your PC.
WHAT’S IN THE BOX
| NDS4615AU | LPC |
|---|---|
| User Manual | 2PCS ( 1 Chinese, 1 English) |
| USB2.0 Cable( 1.5m) | LPC |
| Self-Tapping Oval Head Screws(420) | 2PCS |
| Phillips Flat Head Machine Screw(36mm) | 4PCS |
| Mounting brackets | 2PCS |
| Velcro | 2PRS |
PRODUCT TECHNICAL DATA
Product data
Dynamic Range(RCA Input)| 2>100dB
S/N (RCA Input)| 2>90dB
THD| <0.05%
Frequency Response| 20Hz – 20KHz
Input Impedance| High level:470
Low Level Output Impedance| 510
Maximum Output Power| 4CH50W
Signal Output Range| RCA:5Vpp; High level:28Vpp
Working Temperature| -20-70C
Power| DC 9V-16V
REM Input| High level Input signal:FL+/FL- or ACC control cable
REM Output| +12V start up voltage output(0.lA)
Standby Power| <0.1W
Net Weight| Approx. 0.66kg
Product Dimension| 173(L) 115.5(W) 34(H)mm
Technical Sheet
Input Type| 4 channels high level, support built-in Bluetooth, support U DISK
playback Support manual adjustment function, Support external wiring
controller
---|---
Output Type| 2 channels low level, 4CH x 50W power
Output Gain| Gain range: mute, -59.9dB – 0.0dB
Output Signal EQ| Equalizer engine:
1.Frequency range: 20Hz – 20KHz, 1Hz accuracuy
2.Q value (slope): 0.404 – 28.852
3.Gain: -12.0dB -+ 12.0dB, 0.1dB accuracuy
Output Signal Crossover| Each output is equipped with multi-order high and low
pass independent filters.
1. Filtering types: Link-Ril, Butter-W, Besse!
2. Filtering frequency division point: 20Hz – 20KHz. Resolution 1Hz
3.Filter slope (slope) setting: 6dB / Oct to 12dB / Oct and OFF
Output Phase and Time Alignment| Each output channel can be adjusted for phase
and delay, parameter range:
Phase: in-phase or reverse-phase (0° / 180°)
Delay: 0.000 to 5.396ms, 0 to 187 cm, 0 to 74 inch
Presets| Save 6 presets into the device
PRODUCT DIMENSIONS
INSTALLATION INSTRUCTIONS
The machine interface diagram is as follows:
-
USB Port
Insert the U disk, and play the songs in the U disk under the audio source of the player. -
The controller port
Data call and total volume adjustment can be performed by the line controller. -
PC connection port
USB2.0 port, no need to download the driver installation, connected to the computer sound software installed automatically. -
AUX Low-level input port
Install a bass amplifier or subwoofer to use the RCA output of SUB-R and SUB-L to enhance the bass intensity of the audio system. -
High-level input and output port
RR+
OUT| RR-
OUT| RL+
OUT| RL-
OUT| FR-
IN| FL-
IN| RL-
IN| RR-
IN| GND| +12V
---|---|---|---|---|---|---|---|---|---
FL+
OUT| FL-
OUT| FR+
OUT| FR-
OUT| FR+
IN| FL+
IN| RL+
IN| RR+
IN| REM
OUT| ACC
a.”+” is positive or positive; “-” is negative or inverted (ground).
b. Before connecting the power supply, you must confirm that the power supply
meets the designed power requirements and connect in strict accordance with
the equipment instructions. Otherwise, the equipment may be damaged and may
cause accidents such as fire, electric shock, etc.
-
Machine start mode switch
When the switch is turned to the “ACC” terminal, the machine is started by ACC, and when it is turned to the “HOST’ terminal, the machine is started by the high-level FL+/FL- input signal. -
Power indicator light
-
Super bass effect adjustment knob Adjustable gain and low pass filter.
-
Rear sound field sound effect adjustment knob Adjustable gain, treble, midrange, bass.
-
Front sound field sound effect adjustment knob Adjustable gain, treble, midrange, bass.
SOFTWARE INTRODUCTION
PC Software Operation Introduction
(PC can be downloaded from the official website
(http://www.nakamichicaraudio.com, CONTACT, Downloads)) Computer
Configuration Requirements: Screen resolution higher than 1280 768, otherwise
the software UI is incomplete, only suitable for windows operation system
laptop. desktop and pads.
Menu
editing area
Main functions: File and options operation.
a. Click the “File” pop-up window. and select to load the scene on your
computer, save it as a scene on your computer, load the whole machine scene or
save the whole machine scene.
b. Click on “Option” to select Chinese and English switching, firmware Update,
boot default source restore factory settings, help and about settings.
Function editing area
Main functions: scene, input source, hardware manual tuning, and joint tuning
settings
a. Click “Call or “Save” to recall or save 6 sets of scene data
b. Click the drop-down box of “Input source” to select the input audio source.
Their ore analog, Bluetooth, and player options
c. Click the “Manual adjustment” fader to switch to the hardware manual
adjustment setting.
d. Click “Link” to set the synchronization method of joint debugging: copy
from left to right or copy from right to left.
Main volume and software connection editing area
Main functions:
master volume and computer software connection settings.
a. Main volume adjustment range: off, -59dB 6d8. Click the speaker button to
mute the main volume.
b. Click the “Not Connected” button to connect the host with a PC.
Output channel editing area
Main function: selection of output channel.
Channel delay, volume, phase editing area
Main functions: output channel volume, mute, forward and reverse and delay
settings.
a. Volume adjustment: Push the fader left and right to adjust the sound level,
you can also enter a value or scroll the mouse wheel in the volume input box
to adjust the sound level. Click the ham button to switch to mute
b. Positive phase adjustment: Click [0″] or [180°] to switch between the
positive phase and reverse phase.
c. Delay: set the delay value by scrolling the mouse wheel in the delay input
box, or enter the value to set the delay value.
d. Delay Unit button: Click the drop-down list to select milliseconds,
centimeters, and inches.
Channel divider editing area
Main Function Setup: Channel High & Low Pass Filter Setup
Adjustable: Filler Type. Frequency point and Q Value (Gradient or Slope).
Equalizer editing area
a. Reset EQ. II is used to restore the parameters of the 9-band equalizer to
the original pass-through mode (the frequency of the equalizer, the Q value,
and the gain are restored to the initial value].
b. Restore EQ: Switch between the currently designed equalizer state
parameters and the pass-through mode (the gain of all equalization points is
restored to 0 dB, the frequency and value are unchanged).
Channel EQ editing area
Main function: The equalization setting of the current output channel, equalization adjustable items: frequency, Q value {response bandwidth) and gain (increase or decrease the frequency response amplitude near the frequency point).
Smart-phone Software Operation Instruction
[APP can be downloaded from the official website
[http://www.nakamichicaraudio.com, CONTACT, Downloads))
Home Interface
It can restore factory settings. hardware manual switch, the power-on default
sound source. share sound effects, save the sound effects, turn on local sound
effects, and check the model and version number of the unit. Frequency mode,
Audio source setting, playlist, advanced tuning interface entry, and volume
setting: storage and recall of 6 sets of preset scenes.
A. Connection Status:
Red means not connected, green means connected.
B. Menu:
You can perform operations such as restoring factory settings, and hardware
manual switching. starting default sound source. sharing sound effects,
saving sound effects, opening local sound effects, and viewing the model and
version number of the machine
C. Audio source selection:
There are analog, Bluetooth, and player options.
D. Playlist:
Click on the playlist to enter the player interface, you can slide left and
right to adjust the total volume, the volume range:
0-66. can play songs in the U disk.
E. Advanced tun:
Click [Advanced Tuning] to enter the delay interlace. channel interlace and EQ
interlace settings.
F. Volume adjustment:
Press and hold the volume scale clockwise or counterclockwise to adjust the
volume.
The main volume range is0 66, The subwoofer range:0 – is 60, and The medium,
high, and low volume range is -12d8 – + 12dB.Tap the speaker button to mute
the master volume.
G. Preset scene
There are l6 presets to choose from.
Deloy Interface
Sound field positioning output delay adjustment.
H. Unit switching:
Switch between milliseconds, centimeters. and inches.
I. Delay setting:
Click the setting window of the corresponding channel. Slide the dots left and
right to set the delay value. Delay settings can be made for CHI-CH6 speakers.
Delay range: millisecond range: 0.000 ~5.396 cm range: 0 – 187; inch range:0
-74.
Channel Interface
Channel selection. volume. mute. forward and reverse, high and low pass
frequency setting, and joint tuning operation.
J. Output channel selection: 6 channels are available
K. Channel volume. phase: The volume can be adjusted by sliding left and
right, the volume range: 0 -60, click the speaker button to mute. Forward and
reverse switching
L. Channel type: Choose from Link-Rill. Butter-W and Bessel.
M. Slope selection: 6dB/Oct. 12d8/0ct and OFF can be selected.
N. Frequency Range.20Hz–20KHz.
O. Channel joint debugging settings: Click the joint debugging button, and the
joint debugging window will pop up to select the joint debugging method.
EQ Interface
Corresponding to the adjustment of the output channel EQ curve (gain, Q value,
and frequency]; reset equalization, pass-through equalization, or parametric
equalization operation settings.
P. EQ display: Edit the display area.
Q. Output EQ gain, Q value, and frequency settings: Output EQ go in setting:
left and right sliding screen can select EQ, you con drog the slider up and
down. Select the first-line value, and drag the slider bar left and right in
the pop-up dialog box to adjust the adjustment range: -1208-+12d8.
Q value: Click the second line value, and drag the slider bar left and right
in the pop-up dialog box to adjust, the adjustment range is 0.404-28.852
Frequency setting: Click the third line value, and drag the slider bar left
and right in the pop-up dialog box to adjust it. The adjustment range is 20Hz-
2OKHz.
Q . Reset equalization, restore equalization, pass-through equalization
settings: Click [Reset EQ] to restore the parameters of the equalizer to the
original pass-through mode (the equalizer frequency, Q value, and gain are
restored to their initial values).
When there is channel adjustment, display [straight-through equalization],
click [straight-through equalization], click [OK] all values (frequency, Q
value, and gain) will return to the initial value. At this time, the
[straight-through equalization] button will become [recovery equalization].
Press the button and click [Resume Equilibrium], all values (frequency, Q
value, and gain) will be restored to the value before the pass-through.
http://www.nakamichicaraudio.com
SCAN OUR QR CODE OR VISIT
WWW.NAKAMICHICARAUDIO.COM
FOR COMPLETE AUDIO SETTINGS INSTRUCTIONS
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Made in China
Documents / Resources
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Nakamichi NDS4615AU Digital Sound
Amplifier
[pdf] User Manual
NDS4615AU, Digital Sound Amplifier
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