Nakamichi NBF17.0A 6.5 Inch Full Aluminum Active Subwoofer User Manual
- June 2, 2024
- Nakamichi
Table of Contents
Nakamichi NBF17.0A 6.5 Inch Full Aluminum Active Subwoofer
PANEL CONTROLS AND FEATURES
A. POWER STATUS LED
This bi-color LED glows green when power is on and no problems are present.
If one of the protection circuits comes on, it will change to red.
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.4 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 sub woofer 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. REMOTE LEVEL CONTROL PORT
Attach the included remote level control to control the volume level of the
sub wooer independently.
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. LOW LEVEL RCA INPUTS
Low level inputs are the recommended way to introduce the audio signal to the
subwoofer if RCA outputs are present on your head unit or other signal source
(such as a sound processor).
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
WIRING
LOW LEVEL INPUT WIRING
Low-level (RCA) input wiring is preferred for best audio performance. Most
trunk and under-seat installations will require a 6-12 feet RCA cable. Always
use a high quality cable.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
HIGH LEVEL INPUT WIRING
The high level input(s) should only be used when your receiver 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 problems.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
**POWER CONNECTIONS
**
Connect the ground terminal to the closest point on the chassis of the
vehicle. 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 car battery, and run 8
gauge (or heavier) cable from this fuse to the amplifier location. Then
connect the fuse holder to the “BATT+”(+ 12V) connection on the subwoofer rear
panel.
LOW LEVEL INPUT POWER CONNECTION
HIGH LEVEL INPUT POWER CONNECTION
REMOTE LEVEL CONTROL CONNECTION
Install the remote control securely under the dash or in a similar location where using it will not distract the driver.
ACCESSORY LIST
| 1. User Manual | 1 pc |
|---|---|
| 2. Mounting Screw Bag (04x25mm x 4pcs, 03xl 4mm x 2pcs, 04x6mm x 8pcs) | 1 pc |
| 3. 3.0mm L Type Wrench | 1 pc |
| 4. Input Cable | 1 pc |
| 5. Remote Control | 1 pc |
| 6. Remote Cable | 1 pc |
| 7. Mounting Bracket | 4pcs |
SPECIFICATIONS
| N-power | 1OOW |
|---|---|
| Max power | 650W |
| THD | <0.5% |
| Signal-to-noise ratio | >90dB |
| Frequency response | 20Hz – l 80Hz |
| Input sensitivity . high level | 1.OV |
| Input sensitivity , low level | 300mV |
| Low pass filter | 50Hz – l 80Hz |
| Bass Boost | 0 – l 2dB |
| Subsonic Filer | 20Hz (Fixed) |
| Fuse rating | 20 A |
| Subwoofer | 6.5″, 4 0 |
| Dimensions (L x W x HJ mm | 245 x 180 x 72mm |
TROUBLESHOOTING
If you experience operation or performance problems with this product, compare your installation with the electrical wiring diagram on the previous pages. If problems persist, read the following troubleshooting tips which may help eliminate the problems.
| SYMPTOM | POSSIBLE REMEDY |
|---|---|
| Products will not power up | Check to make sure you have a good ground |
connection. Check that the Remote Input (Turn-on) has at least SV DC. Check
that there is battery power on the(+) terminal.
Check that there is at least 12V.
Check all fuse, replace if necessary.
Make sure that the Protection LED is not illuminated. If it is lit shut off
the amplifier briefly, and then repower it.
Protection LED comes on when amplifier is powered up| Turn down the volume
control on the head unit to prevent overdriving. Check that there is good air
cirulation around the amp.
No output| Check that all fuses are OK.
Check that unit is properly grounded,
Check that the Remote Input (Turn-on) has at least SV 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 inputs to the power sub’s control
panel. If the hiss disappears, then plug in the component driving the
amplifier and unplug its input s. If the hiss disappears at this point, go on
until the faulty/noisy component is found .
It is best to set the amplifier’s input level control as low as possible .
The best subjective signal-to-noise ratio is achieved in this manner . Try to
set the head unit as high as possible (without distortion).
Squealing noise is present.|
Check for improperly grounded RCA interconnects.
Distorted sound .
| Check that the Input Level Control is set to match the signal level of the head unit.
Engine noise (static type)
| This is usually caused by poor quality RCA cables, which can pick up
radiated noise. Use only the best quality cables, and route them away from
power cables.
Engine noise (alternator whine)| Check that the RCA grounds are not shorted to
the vehicle c chassis. Check that the head unit is properly grounded .
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