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A. POWER STATUS LED

This LED glows green when power is on and no 
problems are present.

B. PHASE SHIFT

Use this switch to help compensate for time 
alignment problems in the system. Such 
problems usually result from having the 
subwoofer at a different distance from the 
listener than the other speakers in the system.

C. AUTO POWER ON

The AUTO POWER ON(ON/OFF) is for high level 
(speaker-level) connections. When the switch 
is in the "ON" position, the subwoofer will AUTO 
POWER ON when there is signal input.If the 
amplifier detected no signal input, the 
amplifier will auto turn off, If you prefer to use 
the remote turn on/off connection, the switch 
is in the OFF position.

Note: Please connect the remote terminal to 
the remote output of head unit as Fig.2 when 
you hear the unit turn ON/OFF POP noise from 
the subwoofer.

D. LOW PASS FILTER

This control permits you define the frequency 
range you want the subwoofer amplifier to 
receive. The subwoofer will reproduce all 
sound below the frequency you set.

Note: The low pass filter frequency can be 
higher or lower  than the standard. There have 
+/-20% tolerance.

E. BASS BOOST

The BASS BOOST feature will increase the 
sound level in the bass frequencies.

F. INPUT GAIN CONTROL

After you have installed your system, turn this
control to minimum.
Turn the head unit on (and the subwoofer will 
turn on via the remote connection). Turn the 
head unit volume to about 2/3 full level.
Slowly turn up the subwoofer input gain 
control until you hear a small amount of 
distortion. Then reduce the level until the 
distortion is completely gone. Level the 
control at this setting.

G. LOW LEVEL RCA INPUTS

Low level inputs are the recommended way 
to introduce the audio signal to the subwoof-
er if RCA outputs are present on your head 
unit or other signal source (such as a sound 
processor).

H. HIGH LEVEL (SPEAKER LEVEL) INPUTS

If your head unit does not have RCA outputs 
you can use the speaker outputs for the audio 
source for the subwoofer. Use the supplied 
cable and wire harness and connect the 
outputs properly as shown in the connection 
diagram in this manual.

I. REMOTE LEVEL CONTROL PORT

Attach the included remote level control to 
control the volume level of the subwooer 
independently.

J. FUSE

Do not use a fuse with a different value and 
never replace the fuse with a wire or coin.

K. POWER INPUT TERMINAL

L. PROTECT STAIUS LED

This LED glows red when protection circuits is 
comes on.

PANEL CONTROLS AND FEATURES

3EN

Summary of Contents for NBF618S

Page 1: ...6x8 ACTIVE ALUMINUM SUBWOOFER User Manual NBF618S nakamichi caraudio nakamichicaraudio com nakamichi global...

Page 2: ...nfamiliar with understanding the wiring and installation diagrams or testing instructions do contact your nearest Nakamichi dealer to perform the installation for you Safety Warnings and Consideration...

Page 3: ...ble ties or wire clamps to protect them from moving parts and sharp edges This apparatus shall not be exposed to dripping or splashing and no object filled with liquids shall be placed on the apparatu...

Page 4: ...S BOOST feature will increase the sound level in the bass frequencies F INPUT GAIN CONTROL After you have installed your system turn this control to minimum Turn the head unit on and the subwoofer wil...

Page 5: ...Use 8 gauge or heavier wire to connect the ground cable Connect the remote terminal to the remote output of head unit using 16 gauge or heavier wire Connect an empty fuse holder within 16 40 cm of the...

Page 6: ...r lacks RCA outputs If the RCA outputs are not present connect the speaker outputs from the receiver to the high level input connector of the amplifier Be sure to observe polarity to avoid audio phase...

Page 7: ...at least 5V DC Check that the RCA audio cables are plugged into the proper inputs Low output Reset the Level Control Check the Crossover Control settings High hiss in the sound Disconnect all RCA inp...

Page 8: ...China WWW NAKAMICHICARAUDIO COM INSTRUCTIONS SOFTWARE DOWNLOADS AND WARRANTY REGISTRATION nakamichi global nakamichi caraudio CONNECT WITH US ONLINE TO EXPLORE NAKAMICHI S COMPLETE RANGE Nakamichi Cor...

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