Maxxsonics HFI1204, HFI1254 User Manual

HFi SERIES

CAR AUDIO SUBWOOFERS

Congratulations on your purchase of the new Hifonics HFi Series
subwoofer system.
The HFi subwoofer series offer superior sonic accuracy, intense high
power sound quality with exotic build materials and outstanding
good looks.

Available in DVC & SVC 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
Nickel Plated Push & Insert 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

As with all high quality car audio products, we recommend
professional installation by an authorised 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.

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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.

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