Maxxsonics Car Speaker HFI1204 User Manual

SUBWOOFER INSTALLATION AND WIRING DIRECTIONS  
Enclosure Materials  
Typically, 5/8” or 3/4” MDF (Medium Density Fiber Board) is best  
for most applications. 3/4” MDF is recommended.  
Enclosure Build Materials  
Connecting joints need to be glued and screwed to ensure no  
air escapes and joints do not separate under high pressure.  
Mitered and rabbit joints also help to ensure the enclosure joints  
are secure.  
Bracing  
Internal bracing is also recommended to prevent flexing and to  
strengthen the enclosure.  
Note: The volume taken up by the bracing should be added to the  
total enclosure interior volume.  
There are two common bracing methods.  
1. Corner Bracing: These help prevent the connection joints  
from separating under heavy vibration and air pressure.  
Use 1’ x 1” MDF at all interior joints  
2. Diagonal Bracing: These internal braces connect the top side  
to the bottom side as well front side to back side. This prevents  
the wood from bowing or pushing outwards.  
Use 1” x 2” with 1” surface contact that is glued and screwed.  
Wiring  
Wiring Parallel, Series or Parallel/Series will affect the final  
impedance at the amp and great care must taken to ensure the  
amp is not driven below it’s intended impedance capabilities.  
2
H I F O N IC S H F S E R IE S S U B W O O F E R S  
Parameters  
W iring  
N o m Z  
Sd  
HFi12S4  
Single  
4.2  
HFi12D4  
Series  
8.88  
Co ils  
O h m  
sqM  
0.05  
0.05  
R e v c  
B L  
3.5  
7.4  
O h m  
TxM  
10.85  
104.86  
278.74  
109.41  
116.12  
27.98  
5.12  
13.92  
107.4  
285.49  
97.39  
104.1  
29.2  
Vas  
Liter  
uM/N  
G r a m s  
G r a m s  
H z  
C m s  
M m d  
M m s  
Fs  
Q m s  
Q e s  
4.64  
0.607  
0.542  
0.366  
87.7  
0.729  
0.63  
Q t s  
no  
0.354  
87.68  
11  
%
S P L @ 1 W  
Xmax  
R m s  
dB  
11  
m m  
300  
300  
W atts  
W atts  
Maxx  
600  
600  
CLOSED BOX DESIGNS (SEALED)  
Standard Tight Bass  
Cu b i c F e e t  
/
/
Li t e r s  
Box Volume  
1.25 / 35.4  
0.96  
1.25 / 35.4  
0.94  
Q t c  
F3  
H z  
Cu b i c F e e t  
H z  
46  
46  
Optimal Sound Quality-Flat Response  
Li t e r s  
Box Volume  
2.15 / 60.88  
2.15 / 60.88  
Q t c  
F3  
0.87  
40  
0.8  
41  
V E N T E D B O X D E S I G N S (R O U N D P O R T )  
Standard Tight Bass  
Cu b i c F e e t  
H z  
/
Li t e r s  
Box Volume  
1.65 / 46.72  
40  
1.75 / 49.55  
40  
Fb  
In ch e s/ M illim e t e rs  
In ch e s/ M illim e t e rs  
H z  
Port Size (inside diameter)  
3 / 76.2  
5.6 / 142.2  
39  
3 / 76.2  
5 / 127  
39  
Port Length  
F3  
Optimal Sound Quality-Flat Response  
Cu b i c F e e t  
H z  
/
Li t e r s  
Box Volume  
2.5 / 70.79  
33  
2.5 / 70.79  
34  
Fb  
In ch e s/ M illim e t e rs  
In ch e s/ M illim e t e rs  
H z  
Port Size (inside diameter)  
3 / 76.2  
5 / 127  
32  
3 / 76.2  
4.6 / 116.84  
33  
Port Length  
F3  
F E A T U RE S A R E SU B JE CT T O C H A N GE W I T H O U T N O T IC E  
NOTE: All above box volumes are internal values and already include subwoofer and port displacement.  
The F3 value represents the -3db cut off of the enclosure in Hz.  
Polyfill may be added to sealed eenncclloosuusreres s to reach the desired Q-Value.  
3
Glossary of Terms  
Q
The energy losses of relative damping (ratio of stored to dissipated  
energy or ratio of reactive to resistive energy).  
Free air resonance of driver in Hz.  
Fs  
Qms Mechanical Q.  
Vas Volume of air equivalent todriver from the rest position.  
Cms Mechanical compliance of a loud speaker piston.  
Mms Moving mass of total loud speaker piston assembly.  
Xmax The maximum linear excursion of a loud speaker.  
Sd Surface area of the cone.  
Dia The piston diameter of a loud speaker.  
Qes Electrical Q of a system.  
Re DC resistance.  
Le VC inductance.  
Pe Maximum input power.  
Qts Total Q of the system.  
Sens Sensitivity.An efficiency measurement in dB’s.  
Vc Volume of a closed or sealed enclosure  
Vb Volume of a vented enclosure.  
Fc The resonant frequency of a closed or sealed system  
Fb The resonant frequency of a vented system  
F3 The half-power (-3dB) frequency of a loud speaker enclosure  
Qtc The Q of a loud speaker at Fc in a closed box, considering both  
it’s electrical and mechanical resistance.  
QL The Q of a vented box, resulting from all box losses.  
DV Diameter of vent.  
LV Length of vent.  
H
W
D
Height.  
Width.  
Depth  
4
HFi12D4  
DVC 4Ohms  
Parallel  
Series  
-
-
+
-
+
-
+
+
-
-
-
+
+
+
2-Ohms  
+
8-Ohms  
+
-
+
-
-
Parallel Coils / Parallel Subs  
-
+
-
+
+
-
+
-
+
-
+
-
-
-
+
1-Ohm  
+
+
-
Series Coils / Parallel Subs  
-
+
-
+
+
-
+
-
+
-
+
-
-
-
+
+
-
8-Ohms  
+
5
5.61” / 142.5mm  
2.8” / 71mm  
6
Maxxsonics Limited Warranty  
As the manufacturer of Maxxsonics, MB Quart, Autotek, Crunch and Hifonics car audio products,  
Maxxsonics USA Inc. Warrants to the original consumer purchaser the amplifier to be free from  
defects in material and workmanship for one (1) Year from date of purchase.  
All other parts and accessories of the system are warrantied to be free from defects in  
material and workmanship for one (1) year from date of purchase. Maxxsonics will  
repair or replace at it’s option and free of charge during the warranty period, any system  
component that proves defective in materials and workmanship under normal installation,  
use and service provided that the product is returned to the authorized Maxxsonics dealer  
from where it was purchased. A photo copy of the original receipt must accompany the  
product being returned.  
Valid purchase receipts will contain the name and address of the authorized reseller.  
Any damage to the product as a result of misuse, abuse, accident, incorrect wiring,  
improper installation, alteration of date code or bar code labels, revolution, natural  
disaster, or any sneaky stuff because someone messed up, repair or alteration out side  
of our factory or authorized service centers and any thing else you have done that you  
should not have done is not covered.  
This warranty is limited to defective parts and specifically excludes any incidental  
or consequential damages connected therewith. This warranty is not to be construed  
as an insurance policy.  
Warranty on installation labor, removal, re-installation and freight charges are not the  
responsibility of Maxxsonics USA Inc.  
Warranty products damaged as a result of insufficient or improper packing materials  
are not covered by this limited warranty and such damaged product will be returned  
“as is” at the expense of the owner.  
7

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