Autotek SM12D4 User Manual Download Page 3

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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.

Summary of Contents for SM12D4

Page 1: ......

Page 2: ...y an authorised Autotek 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...

Page 3: ...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...

Page 4: ...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 enclosures to reach...

Page 5: ...ud 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 s...

Page 6: ...a a u u t t o o t t e e k k a a u u t t o o t t e e k k a a u ut to ot te ek k a a u u t t o o t t e e k k a a u u t t o o t t e e k k a a u u t t o o t t e e k k a a SERIES 8 Ohms u ut to ot te ek k...

Page 7: ...ARALLEL SUBS 1 Ohm u ut to ot te ek k a a u u t t o o t t e e k k a a u u t t o o t t e e k k a a u u t t o o t t e e k k a a u ut to ot te ek k a a u u t t o o t t e e k k a a u u t t o o t t e e k k...

Page 8: ...48mm Mounting Depth When designing an enclosure for this subwoofer please ensure to leave atleast 2 of clearance from the back of the motor to the back of the enclousre 12 24 311mm Outside Diameter 11...

Page 9: ...alid 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...

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