Nakamichi NG 112 User manual

★ Design and specifications are subject to change without notice.
NG 112
RICH BASS - SUBWOOFER UNIT
Dimensions (Unit: mm)
Nominal Size:
RMS Power Handling
Impedance
Frequency Response(+/-3dB in car):
Mounting Cutout Diameter:
Mounting Depth:
TMt
Q-Tune : (HP& Q Setting)
Vent Diameter:
Vent Length:
Tuning Frequency:
TMt
Q-Tune : (HP& Q Setting)
SPECIFICATIONS/Enclosure Recommendations Thiele-Small Parameters
12''
250w
4Ω + 4Ω
40-1000 Hz
11.2'' (284mm)
5'' (126mm)
33Hz@0.7
4'' (10cm)
13'' (33cm)
34Hz
34Hz@0.7
Thank you for purchasing the
subwoofer speaker. For the secure
installation and perfect operation
of your speaker, please read and
understand all instructions before
you use the apparatus.
FS:(Hz)
Re: (Ohms)
Qms:
Qes:
Qts:
Was:(Liters)
Mms:(Grams)
Cms:(M/Newton)
Xmax:(Mm)
Xmech:(Mm)
2
Sd:(CM )
Bl:(Tesla-M)
SPL EH:(dB@1w/1m)
SPL Sen:(dB@2.83v)
26
1.75
10.4
0.57
0.54
112
137
275
10.5
22
520
827
87.4
94.0
Recommended Sealed
Enclosure Volume*:
3
1.0 ft
(28.3L)
Recommended Ported
Enclosure Volume*:
3
2.0 ft
(56.6L)
26
3.50
10.4
0.57
0.54
112
137
275
10.5
22
520
16.53
87.4
91.0
Pa ra ll el S er ie s
*
TM
tQ-Tune is a feature found on Nakamichi NGTA Amplifiers
Enclosure volumes include basket and port displacement

Speaker cable
(not supplied)
Amplifier Amplifier
The subwoofer is heavy. Attach it firmly to a solid thick baffle-board.
Do not continuously use the speaker system beyond the peak power handling capacity.
Keep credit cards, watches, recorded tapes etc. with magnetic coding away from the speaker
system to prevent damage caused by the magnets in the speakers.
Clean the apparatus with soft, damp cloth. Never use substances such as alcohol, chemicals or
household cleaners on the apparatus.
Important
You can mount the subwoofer on the rear tray.
★ Set the wiring firmly on the floor of the
vehicle, taking the utmost care not to break wires
while installing.
Option 1: Mount on rear tray
Turn off the car ignition key.
★ If the power is on, the click noise generated by the connection may damage the subwoofer.
Cut out the mounting template from the packing box and paste it onto the location selected for
mounting the subwoofer.
Mark the cut-off hole and the 8 bolt holes.
Cut out the marked area and drill the bolt holes.
Installation
Connect the subwoofer to the amplifier.
★ The impedance of the units are related with
how to connect. Make sure that the output
impedance of the amplifier’s speaker terminal
is relevant with connection. (Refer to “How to
complete the wiring”.)
★ Consult the diagram. Be sure to connect
corresponding terminals, i.e. “+” to “+” and “-”
to “-”. Connection with reversed polarity will
degrade the quality of reproduction.
5.
1.
2.
3.
4.
Check and identify the contents of your package:
1. Subwoofer (1); 2. Installation manual (1); 3. Screw Ø5×30(8); 4. Mounting template(1).
What’s in the box
Mount the subwoofer into the rear tray with the supplied screws. 6.
Option 2: Install in a sealed enclosure
SureSet Fuse Configurations
TM
◆ 2-ohm operation ◆ 8-ohm operation
TM
Note: The SureSet feature utilizes standard mini automotive ATC fuses to select between series or parallel voice-coil
operation (DVC only). The fuses also provide voice-coil protection under transient conditions such as accidental
momentary overdrive. The fuses will not protect against voice-coil failure resulting from long term high power abuse.
Single NG 112 Enclosure Design Example - Sealed
TM
In-Car Response w/Q-Tune
Enclosure Response
H=Height W=Width D=Depth Gross Volume t
TM
Q-Tune :(HP & Q)
10.5''/ 267mm 13.0''/ 331mm 13.0''/ 331mm 3 1.0 Ft / 28.3L 28Hz@0.707
Enclosure dimensions are internal and include basket displacement
This enclosure size is an example and these dimensions can be modified provided that the exact internal volume is
retained
3/4-inch thick M.D.F. is recommended as a minimum
TM
tQ-Tune is a feature found on Nakamichi NGTA Amplifiers
TM
In-Car Response w/Q-Tune
Enclosure Response
Single NG 112 Enclosure Design Example - Ported
Enclosure dimensions are internal and include basket displacement
This enclosure size is an example and these dimensions can be modified provided that the exact internal volume is
retained and that there is adequate space behind the vent (diameter of port from the back and side walls)
3/4-inch thick M.D.F. is recommended as a minimum
* Recommended distance from sides and back walls of enclosure
TM
tQ-Tune is a feature found on Nakamichi NGTA Amplifiers
H=Height W=Width D=Depth P=Port Clearance* Gross Volume
15.5''/ 398mm 16.5''/ 420mm 14.0''/ 356mm 3 2.0 Ft / 56.6L
Port Diameter Port Length t
TM
Q-Tune :(HP & Q)
4.0''/ 100mm 13 0''. / 330mm 34Hz@0.707
4.0''/ 100mm