Soundstream usa-10 User Guide

There are several different enclosure designs for different applications.
The USA subwoofers work very well in 

 the following enclosure

designs. It is up to you to select the specific enclosure that will work the

best for your particular application.

 baffle is the simplest type of subwoofer installation. In this type of

installation, the woofer(s) is mounted to a baffle which is then mounted to
either the rear deck or back seat of the vehicle. The best results are
achieved when the trunk area is virtually airtight and isolated from the

l 

Excellent low frequency extension

l 

Excellent transient response

l 

Uses almost no trunk space

passenger compartment.

l 

Lower power handling

l 

Low to medium efficiency

Sealed Enclosure
Sealed enclosures are relatively simple to build and

install, as all that is required is an airtight box. The

l 

Very good low frequency

extension

l 

Very good transient

response

l 

Medium efficiency

 

larger the sealed

enclosure,

the

l 

High power handling

more the performance resembles that of an infinite baffle installation.

l 

Good low frequency

. Low power handling

extension down to the tuning

below the tuning

frequency

frequency 

l 

High power handling down

l 

Almost no output

 

to the tuning frequency

below the tuning

l 

Higher output than sealed

enclosures

frequency

4

Vented enclosures use a sealed enclosure with a
vent or port in the box which is tuned to resonate at

a specific frequency.
Sealed 

Sealed 

 enclosures enclose both sides of

High power handling

l

within the operating

frequencies

Very high output within

l

the range of the

operating frequencies 

Low power handling
beyond the tuning

frequency

Poor to moderate

transient response

Poor low frequency

extension

 is ported to a specific frequency.

the woofer(s). An
airtight enclosure is

built around the

front and back of the
woofer and one

When constructing any type of enclosure, you must be aware that the

outside dimensions DO NOT represent the true (Net) volume inside.
Such things as woofers, ports, thickness of enclosure material, dividing

wall septums, and any internal bracing will reduce the total amount of the

actual air space available. The following worksheet has been designed

to provide you with the necessary steps to accurately calculate the

absolute (Net) internal volume of any given enclosure.

1.

Measure the outside diameter of the port and divide by 2 for the
radius.

2. Square

the

by 3.14 

 to

port area.

3. Multiply the area

port inside the

port volume.

0

adius and multiply
arrive at outside

 the length of the

enclosure for the