Nakamichi NKSD800.1 Class-D Mono Block Power Amplifier User Manual

Nakamichi NKSD800.1 Class-D Mono Block Power Amplifier

INTRODUCTION

Thank you for your purchase, and welcome to Nokomichi! In order to enjoy better service from us, please keep your original invoice well and complete. You’d better post the copy of bock to the appointed service agent of Nokomichi so that you may get more technical support.

ACCESSORY LIST

• User Manual:                                   LPC
• Amplifier:                                       LPC
• Mounting Screw (CD4 x 2mm):      4pcs
• Fuse(40A):                                       3pcs

SPECIFICATIONS

SPECIFICATIONS|
---|---
N-power Output@ 4 Ohm| 400W X 1
N-power Output@ 2 Ohm| 600W x 1
N-power Output@ 1 Ohm| 800W x 1
MAX Power| 3200W
T.H.D.| <0.1%
Frequency Response| 20HZ – 20kHZ
Signal To Noise Ratio| >90dB
Sensitivity| 0.15V – 8V
Fuse Size| 40A x3
Unit Dimensions ( L x H x W)| 322 x 222 x 54 mm
Net Weight| Approx. 2.7 kg
Box Dimensions ( L x H x W)| 365 x 260 x 88 mm
Gross Weight| Approx.3 kg

DIMENSIONS (UNIT: MM)

POWER CONNECTION LEADS

Notes on the power supply
Connect the + 12V power input lead only after all other leads have been connected. Be sure to connect the ground wire of the unit securely to a metal part of the car. A loose connection may cause a malfunction of the amplifier.

REMOTE: The unit is turned on by applying + l 2Volts to this terminal. This terminal does not draw heavy current like the two power terminals so a thinner connecting wire is acceptable. Standard 18 GAUGE is fine and the standard color is yellow. If the radio is equipped with a power antenna control wire, it can drive this terminal. If the power antenna wire is already in use, you can still splice it. With this method, the unit will turn on automatically with. Nakamichi the radio. Use the power supply lead with a fuse attached whose value is the same as the original fuse. Place the fuse in the power supply lead as close as possible to the car battery. During a full-power operation, Maximum current will run through the system. Therefore. Make sure that the leads to be connected to the + 12V and GND terminals of the unit respectively must be larger than 8-Gauge (AWG.8).

Power Connection Leads Power Connection Leads

System 2: 1 channel mode

 TROUBLESHOOTING

at the amplifier and correct as needed
fuse blown| check power wire integrity and reversed polarity, repair as needed, and replace the fuse
power wires not connected| check power wire and ground connections and repair of replacing as needed
audio input not connected or no output from source| check input connections and signal integrity, repair or replace as needed
speaker wires not connected| check speaker wires and repair or replace as needed
audio cycles on and off| speakers are blown| check system with known working speaker and repair or replace speakers as needed
thermal protection engages when amplifier heat sink temperature exceeds 90°C| make sure there is proper ventilation for the amplifier and improve ventilation as needed
loose or poor audio input| check input connections and repair or replace as needed
distorted output| amplifier level sensitivity set too high; exceeding maximum output capability of the amplifier| reset again referring to the tuning section of the manual for detailed instructions
impedance load to amplifier too low| check speaker impedance  load if below 2ohm stereo or 4ohm mono rewire speakers  to achieve a higher impedance
ishorted speaker wires| check speaker wire connections and repair or replace as needed
speaker not connected to amplifier properly| check speaker wiring and repair of replacing as needed refer to the installation section of this

manual for detailed instructions

distorted output

| ****

internal crossover not set properly for speaker

| reset crossovers referring to the multi-cross crossover configuration section of this manual

distorted output (cont’d)

| ****

speakers are blown

| check system with known working speakers and repair or replace as needed
poor bass response| speakers wired wrong polarity causing cancellation at low frequencies| check speaker polarity and repair as needed
crossover set incorrectly| reset crossovers referring to the multi-cross crossover configuration section of this manual for detailed instructions
distorted output (cont’d)| ****

impedance load to amplifier too low

| check speaker impedance  load, if below 2ohn stereo or 4ohm mono rewire speakers to achieve a higher impedance

short in power wire or incorrect power connections

| check power and ground connections and repair as needed
fuse used is smaller than recommended| replace with proper fuse size
too much current being drawn| check speaker impedance load, if below 2ohm stereo or 4ohm mono rewire speakers to achieve a higher impedance
short in power wire of incorrect| check power and ground connections and repair as needed

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