Speaker system and enclosure structure of speaker system

An enclosure structure of a speaker system, wherein

• an internal space of a hollow framework member extending in a front-back direction of a vehicle is used as a back cavity of the speaker system, the framework member having an internal cavity,
• at least one partition member is attached within the internal cavity of the framework member, the at least one partition member forming a first longitudinal end of the internal space within the framework member, the internal space extending between the first longitudinal end and a second longitudinal end and having a volume smaller than a volume of the internal cavity, and
• a speaker unit is attached to the framework member so that a space behind the speaker unit communicates with the internal space of the framework member so that the internal space is used as the back cavity, wherein
• the space behind the speaker unit is communicated with a central portion of the internal space of the framework member relative to the front-back direction of the vehicle so that spatial path lengths from the central portion of the internal space at which the speaker unit is communicated with the internal space to both the first and second longitudinal ends of the internal space relative to the front-back direction of the vehicle are substantially the same.

A speaker system comprising:

• a hollow framework member having an internal cavity;
• at least one partition member attached within the internal cavity of the framework member, the at least one partition member forming a first longitudinal end of an internal space within the framework member, the internal space extending between the first longitudinal end and a second longitudinal end and having a volume smaller than a volume of the internal cavity;
• and
• a speaker unit attached to the framework member so that a space behind the speaker unit communicates with the internal space of the framework member so that the internal space is usable as a back cavity of the speaker system, wherein
• the space behind the speaker unit is communicated with a central portion of the internal space of the framework member so that spatial path lengths from the central portion of the internal space at which the speaker unit is communicated with the internal space to both the first and second longitudinal ends of the internal space are substantially the same.