Design Advice - Hertz MILLE ML2500 Owner's Manual

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Design Advice

If You have decided to make a box for Your ML Sub on Your own, please remember what follows:
1
19 mm Use a thick material as stiff and dense as possible; like MDF
or high density multilayer wood.
MIN
2
Glue and seal all the box walls using good quality
vinyl glue. Use more glue to seal all internal joints.
Damping materials
4
Always use the gasket between the basket and
the mounting surface, and use a criss-cross
pattern to firmly secure the fixing screws.
5
If possible, use at least one angled wall in the enclosure design.
75° 90°
36
3
Use damping material like AZ Audiocomp
FONOMAT on the internal walls.
6
30 mm
Leave at least 30 mm between the subwoofer back plate
MIN
and the back wall of the enclosure.
7
Make sure the entire enclosure assemble is solidly and safely
mounted to the vehicle's chassis.
8
As the distance between the port and the speaker does not
introduce any perceivable change, the enclosure wall you
choose to locate the reflex port makes no difference.
9
If you place the tuning port next to a corner of the enclosure,
shorten it by 25-30% compared to the simulation. This is
because of the virtual extension of the port being close to the
side walls. Do the same if the port design is lamellar (slot type).
Whenever possible, we recommend you measure the tuning
frequency with a suitable method.
10
In the case of a Reflex (vented), Asymmetric Bandpass
or Double Reflex design, do not add the volume
Vb1 Vb2
displacement of tuning port to the total volume. Only add
+ +
Vtrp
Vtrp the volume displacement of the actual material the port
is made from; for example: the volume displaced by the
Vtrp Volume tablet reflex port wooden board in case of a lamellar (slot type) tuning port.
=
Installation
L
L-25/30%
37