[mfreak]

Is the recommended closure ALWAYS the optimal box to build for subs? I
have a normal size 3/4"MDF generic ported sub box. If I build a new
box to the exact dimensions that are in the manual my subs came with,
will I notice?

[Matt Ion]

mfreak wrote:
Is the recommended closure ALWAYS the optimal box to build for subs? I
have a normal size 3/4"MDF generic ported sub box. If I build a new
box to the exact dimensions that are in the manual my subs came with,
will I notice?

The answer is a definite "MAYBE".

Depends on a lot of factors, the difference in volume between your "generic" box
and a "proper" box being the main one, and how the design of that particular sub
reacts to those differences. Shape of the box could have a small but noticeable
effect. Position in the car may make any differences unnoticeable anyway.