Nakamichi NDS4835AU Digital Sound Amplifier User Manual

Nakamichi NDS4835AU Digital Sound Amplifier

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INTROUCTION 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

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.

TROUBLESHOOTING

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 method:

•  Check the ACC connection and make sure it’s secure.

2| No Sound| •  Double check if the unit is in MUT E mode.

•  Check if you have choose the correct input channel.

3| Unable to connect through USB| • Check the USB connection and make sure it’s sec u re.

• Check if the driver “HID-complian t device” has been properly installed in your PC.

WHAT’S IN THE BOX

• NDS4835AU                                                          lPC
• User Manual                                                            2 PCS (1 Chinese, 1 English)
• USB2.0 Cable(l .5m)                                                lPC
• Self-Tapping Oval Head Screws (4*20)                   4 PCS
• Phillips Flat Head Machine Screw (3*6mm)            8 PCS
• Mounting brackets                                                  4 PCS
• Velcro                                                                      2 PRS

PRODUCT TECHNICAL DATA

Product Data

Dynamic Range(RCA Input)| l00dB
S/N (RCA Input)| 90dB
THD| SO.OS%
Frequency Response| 20Hz ~ 20KHz
Input Imp edan ce| Lo w le vel:20KO; High level:5 1O
Low Level Output Impedance| 510
Signal Input Range| RCA:5.SVpp; High level:26Vpp
Signal Output Range| RCA:5.SVpp; Po wer amplifier:4CHx25W
Working Temperature| -20 ~ 70°C
Power| DC 9V ~ l 6V
REM Input| High level Input signal:FL+/FL- or ACC control cable
REM Output| +l 2V Start up volta ge output
Standby Power| S0.lW
Net Weight| Approx. 0. 85 kg
Product Dimension| l 76(L) l 4l.2(W) 39(H)mm
Technical Sheet

Input Type

| 4 channels high Le vel, 4 channels low level, support built-in Bluetooth, support U disk playback, Support external wiring controller
Output Type| 8 channels low level, 4CHx25W power
Output Gain| Gain range: mute, -59.9d B ~ 0.0dB

Output Signal EQ

| 31 band Equalizer Engine :

l. Frequency range: 20Hz ~ 20kHz, l Hz accuracuy 2. Q value (slope): 0.404 ~ 28.85

3.Gain: -12.0dB ~ + 1 2.0dB, 0.l dB accuracuy

Output Signal Crossover

| Ea ch output is equipped with multi-order high and low pass independent filters.

l . Filtering types: Link-Ril, Butter-W, Bessel

2. Filtering frequency division point: 20Hz ~ 20kHz. resolution l Hz

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-pha se or reverse-phase (0°/ 180 °)

Delay: 0.000 to 20.000ms, 0 to 692 cm, 0 to 273 inch

Preset s| Save 6 presets into the device

PEODUCT DIMENSIONS

INSTALLATION INSTRUCTIONS

INTRODUCTION
The machine interface diagram is as follows:

1. Low Level output port
   Connect up to 8 channels low level output.

2. The controller port
   Data call and total volume adjustment can be performed by the line controller.

3. PC connection port
   USB2.0 port, no need to download the driver installation, connected to the computer sound software installed automatically.

4. USB Port
   Insert the U disk, and play the songs in the U disk under the audio source of the player.

5. Low-level input port
   Connect up to 4 channels low-level input.

6. 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.

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 FL +/FL- input signal.

8. Power Indicator light

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 7 68, otherwise the software UI is incomplete, only suitable for windows operation system laptop, desktop and pads.

1. Menu editing area
   Main functions: File, options and preset 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,restore factory settings, help and about settings.

C. Click on the “Preset” pop-up window to select standard, bass, classical, jazz, popular and rock preset.

2. Function edit area
   Main functions: memory, master source, mode selection, reset, link and mixer settings.
   a. Click “Call” or “Save” to recall or save 6 sets of scene data.
   b. Click the drop-down box of “Master source” to select the input audio source. There are analog, Bluetooth and player options.

c. Click the “Mode” box to switch the processor or processor+ AMP.
d. Click “Reset” to select the output configuration to clear or restore to the default state.
e. Click “Joint debugging” to set the synchronization method of joint debugging: 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.

3. Main volume and software connection editing area
   
   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

** Main functions: output channel volume, mute, forward and reverse and delay settings.
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).

7. **Equalizer editing area

a. Reset EQ: It is used to restore the parameters of the 31-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 O dB, the frequency and value are unchanged).
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: The equalization setting of the current output channel, 31-band equalization adjustable items: frequency, Q value (response bandwidth) and gain (increase or decrease the frequency response amplitude near the frequency point).

SOFTWARE INTRODUCTION(SMARTPHONE)

Smart-phone Software Operation Instruction
(APP can be downloaded from the official website(http://www.nokamichicaroudio.com, CONTACT, Downloads))

1. Home Interface
   It can restore factory settings, power-on default sound source, share sound effects, professional sound settings, save sound effects, turn on local sound effects, check the model and version number of the unit. Mode,Audio source setting, player, 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, starting default sound source, sharing sound
   effects,professional sound settings, 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. Player:
   Click on the player 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 setting:
   Click [Advanced Tuning] to enter the delay interface, channel interface, EQ and mixing interface settings.
   F. 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.
   G. Preset scene :
   There are 1-6 presets to choose from.

2. Delay Interface
   Sound field positioning output delay adjustment.
   H. Unit switching:
   Switch between milliseconds, centimeters, and inches.
   I. 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 CH 1 -CH8 speakers.
   Delay range: millisecond range: 0.000 -20.000; cm range: 0 – 692; inch range:0-273.
   

3. Channel Interface
   Channel selection, volume, mute, forward and reverse, high and low pass frequency setting and joint tuning operation.
   J. Output channel selection:
   8 channels are available.
   K. Channel type, 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.Type selection for each output channel.
   L. Channel type:Choose from Link-Rill, Butter-W and Bessel.
   M. Slope selection:
   6dB/Oct, l 2dB/Oct, l 8dB/Oct,24dB/Oct,30d B/Oct,36dB/Oct,48dB/Oct 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.

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.
   P. EQ display:
   Edit the display area.
   Q. 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 gain, 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. 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- 20KHz
   R. 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. Mixer Interface
   4 Analog, Bluetooth-L and Bluetooth-R mixing options and Adjustment, adjustment range: 0 ~ 100.

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