Hifonics HFX12D4 Manuale utente

HFX12D4

HF SERIES

CAR AUDIO SUBWOOFERS

Congratulations on your purchase of the new Hifonics HF Series

subwoofer system. The HFX12D4 subwoofer offers superior sonic

accuracy, intense high power sound quality with exotic build

materials and outstanding good looks.

As with all high quality car audio products, we recommend

professional installation by an authorized Hifonics dealer.

Your dealers knowledge and experience can ensure a problem free

and cosmetically integrated installation.

If you choose to install the subwoofers yourself, please read the entire

manual very carefully.

DVC 4-Ohm High-Temp KSV Voice Coils

1” NBR Reinforced Rubber Surround

Large Air Cooled Magnet Assembly

Integrated One Piece Poly Cotton Spider

Injected Poly Light Rigid Cone

Spade Style Speaker Terminals

Poly Light Dust Cap

Heat Dispersing Ported Back Plate

Ultra Ridged Chrome Stamped Steel Basket

High Strength ABS Motor Cover

Operates In Sealed & Ported Enclosures

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.

Q The energy losses of relative damping (ratio of stored to dissipated

energy or ratio of reactive to resistive energy).

Fs Free air resonance of driver in Hz.

Qms Mechanical Q.

Vas Volume of air equivalent to driver 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 Height.

W Width.

D Depth

Glossary of Terms

HFX12D4

DVC 4Ohms

Parallel Coils / Parallel Subs

-1-Ohm

+4-Ohms

Series Coils / Parallel Subs

Parallel

+2-Ohms

Series

-8-Ohms

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