Nakamichi NDST500A User manual

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DIGITAL SOUND AMPLIFIER
NDST500A
User Manual

CONTENTS
N OTICE............................................................................................................................2 EN
TROUBLESHOOTING........................................................................................................2 EN
WHAT'S IN THE BOX.........................................................................................................2 EN
PRODUCT TECHNICAL DATA ........................................................................................3 EN
PEODUCT DIMENSIONS..................................................................................................4 EN
INSTALLATION
INSTRUCTIONS.........................................................................................4 EN
THE SPEAKER WIRING IN NORMAL MODE ...................................................................5 EN
THE SPEAKER WIRING IN BRIDGE MODE .....................................................................5 EN
INTRODUCTION ..............................................................................................................6 EN
SOFTWARE INTRODUCTION ..........................................................................................8 EN
1 EN

2 EN
INTROUCTION AND TROUBLESHOOTING
WHAT'S IN THE BOX
NDST500A 1pc
User Manual 2pcs（1 Chinese, 1 English）
USB2.0 Cable(1.5m) 1pc
Speaker Cable (150mm) 1pc
High Level Input/Output Wire 1pc
Allen Wrench(2.5*50.5mm) 1pc
Allen Wrench(1.5*18.8mm) 1pc
Self-Tapping Oval Head Screws（PA4*40mm）4pcs
Velcro 2Prs
1. To prevent short circuit, please keep the device away from water or damp places.
2. 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.
3. 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.
NOTICE
When it is still not
repairable after
inspection:
Please return the unit to
factory settings.
Please consult the
nearest service center or
authorized agent for
further aptions.
Still unable to repair:
Ensure all cables and prts are securely connected before turning on the power.Shown
below is the basic troubleshooting procedure that you should follow.
TROUBLESHOOTING
When a failure occurs:
Before sending the unit
for repair, please refer to
the table for common
troubleshooting solutions.
Check the power connection and make sure it’s sucure.
Check the ACC connection and make sure it’s secure.
Double check if the unit is in MUTE mode.
Check if you have choose the correct input channel.
Check the USB connection and make sure it’s secure.
Check if the driver “HID-compliant device” has been
properly installed in your PC.
through

3 EN
PRODUCT TECHNICAL DATA
Product Data
Dynamic Range(RCA Input) ≥100dB
S/N (RCA Input) ≥98dB
THD ≤
≤
0.05%
Frequency Response 20Hz~ 20KHz
Input Impedance High Level :240Ω
Low Level Output Impedance 51Ω
Signal Input Range RCA:7.5Vpp; High Level：26Vpp
Signal Output Range RCA:8Vpp; Amplifier Maximum Power :
4CHx50W+4CHx80W+2CHx160W，Bridging 1x300W
Working Temperature -20~ 70℃
Power DC 9V~16V
REM Input High Level Input Signal: H1+/H1- or ACC control cable
REM Output +12V Start up Voltage Output
Standby Power 0.1W
Gross Weight Approx. 2.08kg
Product Dimension 255(L) *175(W) *47(H)mm
Technical Sheet
Input Type 6 Channels High Level, 2 Channels Low Level, External digital Bluetooth,
Optical Coaxial
Output Type 12 Channels Low Level, 4CHx50W+4CHx80W+2CHx160W Power,Bridging
1x300W
Output Gain Gain Range: Mute,-59.9dB ~ 0.0dB
Output Signal EQ
31 Band Equalizer Engine :
1. Frequency range: 20Hz ~ 20KHz, 1Hz Accuracuy
2. Q value (slope): 0.404 ~28.85
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, Bessel
2. Filtering frequency division point: 20Hz ~20KHz. Resolution 1Hz
3. Filter slope (slope) setting: 6dB / Oct to 48dB / 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 20.000ms, 0 to 692 cm， 0 to 273 inch
Presets 6 Presets into the device

255mm
175mm
47mm
255mm
47mm
4 EN
PEODUCT DIMENSIONS
INSTALLATION INSTRUCTIONS

5 EN
THE SPEAKER WIRING IN NORMAL MODE
THE SPEAKER WIRING IN BRIDGE MODE
2×160W
1×300W
4×50W
4×80W
4×50W
4×80W

6 EN
INTRODUCTION
The machine interface diagram is as follows：
1. USB2.0 Port, Connect to the computer tuning software
No need to download the driver installation, connected to the computer sound software
installed automatically.
2. Low level input port
Connect up to 2 channels low level input.
3. Low Level output port
Connect up to 12 channels low level output.
4. Optical and Coaxial port
When the optical or Coaxial input cable of in-car CD or DVD player is connected,the sound
source of the DSP is switched to digital input,and optical or coaxial digital signals can be played.
5. The controller port
Data call and total volume adjustment can be performed by the line controller.
6. External Digital Bluetooth Input
Connect the external Bluetooth, the LED indicator will flash, the indicator will stop flash and will
be always on once you have connected your Mobile phone to the device, then you can play
music in your phone, and the device will change the high level input to Bluetooth Input.
7. 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 H1+/H1- input signal.
8. Protection indicator light
9. Power indicator light
10. Power port
12 3 4 5 6
7
8
9 10 11 12 13 14

7 EN
INTRODUCTION
11. The fuse
Two 25A fuses.
12. Power output port
1, 2 power amplifier output, can be bridged.
13. Power output port
3～10 way power output.
14. High level input and output port
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.
+
OUT1
-
OUT1
-
OUT2
+
OUT2
NC NC -
OUT3
-
OUT4
-
OUT5
-
OUT6
-
OUT7
-
OUT8
-
OUT9
-
OUT10
ACC REM
OUT
+
OUT3
+
OUT4
+
OUT5
+
OUT6
+
OUT7
+
OUT8
+
OUT9
+
OUT10
-
H1 - H2 - H3 - H5 - H6 NC NC NC NC
+
H1 + H2 + H3 + H5
-
H4
+
H4 + H6 NC NC NC NC

8 EN
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 x 768, otherwise the
software UI is incomplete, only suitable for windows operation system laptop, desktop and pads.
1. Menu editing area
Main functions: File, options operation.
a. Click the "File" pop-up window, and select to load the scene on you computer, save it as a scene
on you computer, load the whole machine scene or save the whole machine scene.
b. Click on "Option" to select Chinese and English switching, advanced , firmware Update,boot
default audio source,restore factory settings, help and about settings.

9 EN
SOFTWARE INTRODUCTION
2. Function edit area
Main functions: scene, master source,mixer source, channel type, link, mixer and mode settings.
a. Scene: 6 sets of scene data can be recalled or stored.
b. Master source: Click the input audio source drop-down list to select the input audio source. There
are S/PDIF, Phone, AUX and Hi.Level.
c. Mix source:Click the Input mix drop down list drop-down box to select the mixed audio
source.There are S/PDIF, Phone, AUX, Hi.Level and OFF.
d. Reset: Click Reset to clear the channel type or restore the default channel type.
e. Link:Click the Link to set the Link synchronization mode: copy from left to right or copy from right
to left.
f. Click "Mixer" to enter the mixing interface, the interface is as shown below.
g. Click "Stereo" to switch between stereo or bridge.

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SOFTWARE INTRODUCTION
3. Main volume and software connection editing area
Main functions: master volume and computer software connection settings.
a. Main volume adjustment range: off, -59dB ~ 6dB. Click the speaker button to mute the main
volume.
b. Click the " Not Connected" button to connect the host with a PC.
4. Function editing area
Main function: configure the type of output channel.
5. Channel delay, volume, phase editing area
a. Push the fader left or right to adjust the sound size, or enter a value or roll the mouse wheel in the
volume input box to adjust the sound size. Click the speaker button to switch mute.
b. Positive phase adjustment: Click [0°] or [180°] to switch between 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.
6. Channel divider editing area
Main Function Setup: Channel High & Low Pass Filter Setup.
Adjustable: Filter Type, Frequency point and Q Value (Gradient or Slope).

11 EN
SOFTWARE INTRODUCTION
7. Equalizer editing area
a. Reset EQ:It is used to restore the parameters of the all 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).
c. Click PEQ Mode to switch GEQ Mode.The Q value and frequency cannot be adjusted in the
PEQ Mode interface.
8. Channel EQ editing area
Main function configuration: Equilibrium design of current output channel, 31-band equalization
adjustable: frequency, Q value (response bandwidth) and gain (increasing or decreasing the
frequency response amplitude near the frequency point).

12 EN
SOFTWARE INTRODUCTION(SMARTPHONE)
Smart-phone Software Operation Instruction
(APP can be downloaded from the official website(http://www.nakamichicaraudio.com, CONTACT, Downloads))
Home Delay
1. Home interface
It can restore factory settings, share sound
effects, save sound effects, turn on local
sound effects, check the model and version
number of the unit, and exit the software
operation; volume, sound source, mode
settings; storage and recall of 6 sets of preset
scenes.
A.Connection Status:
Red means not connected, green means
connected.
B. Menu:
You can restore factory settings, share
sound effects, save sound effects, turn on
local sound effects, view the model and
version number of the machine, and exit the
software operation.
C.Master source:
Master source: S/PDIF,Phone,AXU and
Hi.Level to choose from.
Mixer source: S/PDIF,Phone,AXU,Hi.Level and
OFF to choose from.
D.Volume adjustment:
Press and hold the volume scale clockwise
or counterclockwise to adjust the volume.
The main volume range is 0 ~ 66, The
subwoofer range: 0 ~ 60, The medium, high
and low volume range -12dB ~ +12dB.Tap
the speaker button to mute the master
volume.
E. Scene preset:
There are 1~6 presets to choose from.
F. Advanced settings:
Click [Advanced Settings] to enter the
settings of the delay interface, channel
interface, EQ interface and mixing.
2. Delay interface
Sound field positioning output delay
adjustment.
G.Unit switching:
Switch between milliseconds, centimeters,
and inches.
H.Delay setting:
Click setting window of the corresponding
channel. Slide the dots left and right to set
the delay value. Delay settings can be
made for CH1~ CH12 speakers.
Delay range: millisecond range: 0.000 ~
20.000; cm range: 0 ~ 692; inch range:0~ 273.

Frequency setting: Click the third line
value, and drag the slider bar left and
right in the pop-up dialog box to adjust it.
13 EN
SOFTWARE INTRODUCTION(SMARTPHONE)
Output EQ
3. Channel interface
Channel high-low-pass crossover setting
with high-low-pass independent filtering.
Adjustable: Filter type, frequency and Q
value (slope or slope).
I. Output channel selection:
Twelve channels are available.
J. Output channel volume setting:
You can adjust the volume by sliding left
and right. The volume range is 0~60. Click
the speaker button to mute.Configurable
output channel type, forward and reverse
switching.
K. Channel divider selection:
Channel type:Choose from Link-Rill,
Butter-W and Bessel.
Frequency Range:20Hz~20KHz.
Slope selection:
6dB/Oct,12dB/Oct,18dB/Oct,24dB/Oct,
30dB/Oct,36dB/Oct,42dB/Oct,48dB/Oct
and OFF can be selected.
L. Joint tuning and channel type settings:
Click the joint tuning button to bring up the
Mixer
joint tuning window and select the joint
tuning method. Click Reset to reset the
output channel type and make the output
type customizable.
4. 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.
M. EQ display:
Edit the display area.
N. Output EQ gain, Q value and frequency
settings:
Output EQ gain setting: A total of 31 EQ, left
and right sliding screen can select EQ, you
can drag 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: -12dB~+12dB.
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.

SOFTWARE INTRODUCTION(SMARTPHONE)
The adjustment range is 20Hz~20KHz.
O. Reset equalization, restore equalization,
pass-through equalization settings:
Click [Reset EQ] to restore the
parameters of the 31-band 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.
5. Mixing interface
6 high level, 2 AUX, digital left and digital
right, Bluetooth left and blue right mixing
selection and adjustment can be
performed. The adjusting range is 0 ~100.
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