Closed subwoofers are rather uncommon, even if they're primarily used for medium and low bass in big open type complete frequency containers, which are extremely common in home theater and car audio field. (More)
The minimal frequency attenuation of the airtight audio box is rather slow, roughly 12dB/oct, and the attenuation slope of this open sound box is 24dB/oct. At a closed sound box, when the frequency is reduced, the displacement of the paper basin will be greater. Compared with the open sound box, the volume in the enclosed audio box may be smaller and not as efficient when the identical F3 is reached.
The horn loaded subwoofer can maximize the low frequency output. Within the business of professional acoustics, the horn loaded subwoofer is easily the most effective line selection system which may match from the loudspeaker design. But as the professional sound industry desperately needs to reinvent the last, we promote this unrivalled box layout to be considered.
The open loudspeaker is broadly utilized, and the open mouth loudspeaker with reasonable design can endure more power from the low frequency segment, because the inverted phase hole can produce more low frequency and also significantly decrease the movement of this paper container. However, if the sound box is under 40Hz, the dimensions of the box will increase rapidly.
