Band pass speaker

A band pass speaker which can project tight clean bass with high quality sound, which is a speaker having a specially designed speaker box, including a first housing and a second housing. The first housing has a predetermined access opening on a front side and has an all around inner wall which provides an inner chamber with the predetermined access opening on the front side, at a back portion surface of the all around inner wall has a curvature, whereby the predetermined access opening is for receiving a second housing. The second housing has at least one sound generating unit mounted on a front side pointing forwardly, in which the second housing having an all around concealed inner wall providing a predetermined inner chamber, whereby at a front side edge of the front side of the second housing is for engaging into the access opening of the first housing leaving a predetermined output opening therebetween.

FIELD OF THE PRESENT INVENTION 
The present invention relates to a band pass speaker and more particularly 
to a sound projecting apparatus that provides focus and clean high quality 
sounds for homes, cars, entertainment theaters and etc. The present 
invention is a breakthrough in the new generation of tight and focused 
bass utilizing speaker system due to its ovation designed inner walls 
which guide all the sound waves generated by a sound projecting unit 
within an inner chamber and driving all the sound waves through and out a 
sound wave focusing pocket. 
BACKGROUND OF THE PRESENT INVENTION 
In today's world we know that technology is growing at a particularly fast 
rate, we can see it grow quickly as time goes by. Some of the fastest 
growing industries in the world today are the electronic industries, 
because the strength in computer science is leading our technological 
society into the future world. 
The audio entertainment industries have been feeding all the consumers with 
great electronic sound producing apparatuses this past decade, and as a 
way of human nature, quality would so long until a new or better product 
emerge into the market. There are countless verities of audio system out 
in the market today, some are good quality electronics and some are bad, 
but the main concern should be on how good the best is. The reason that 
there are so many kinds of speaker designs is because there are many 
different kind of music lovers, and for a certain type of music we need a 
certain type of speaker to bring out the quality in the sounds. 
Recently, band pass loudspeaker enclosure design in demand, especially so 
me of the sub woofer enclosures. The designer can manipulate the tuning 
frequency to trade for the desire bandwidth and its efficiency. 
Conventional band pass enclosure designs are usually constructed in shape 
of square or rectangular with four straight corners, in which the sound 
waves then pass through the duct in the shape of slot or circular. This 
conventional design has left high degree of sound waves trapped inside the 
enclosure both the front and the rear chamber, whereby trapped sound waves 
are known to reflect themselves inside the enclosure and work against each 
other including the driver itself The magnitude of these standing waves 
will increase especially when sound waves are trapped at the comers of the 
enclosure. 
SUMMARY OF THE PRESENT INVENTION 
The main object of the present invention is to provide a band pass speaker 
which can project tight clean bass with high quality sound when the 
speaker is set up with any type of conventional audio system. 
Another object of the present invention is to provide a band pass speaker 
for upgrading of all the future audio system at homes, cars, movie 
theaters and etc.. 
Accordingly, the present invention provides a band pass speaker which can 
project tight clean bass with high quality sound, in which the present 
invention is a speaker having a specially designed speaker box, comprising 
a first housing and a second housing. The first housing having a 
predetermined access opening on a front side and has an all around inner 
wall which provides an inner chamber with the predetermined access opening 
on the front side, at a back portion surface of the all around inner wall 
has a curvature, whereby the predetermined access opening is for receiving 
a second housing. The second housing having at least one sound generating 
unit mounted on a front side pointing forwardly, in which the second 
housing having an all around concealed inner wall providing a 
predetermined inner chamber, whereby at a front side edge of the front 
side of the second housing is for engaging into the access opening of the 
first housing leaving a predetermined output opening therebetween.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to FIGS. 1 to 4 of the drawings, a preferred embodiment of the 
present invention is illustrated. A band pass speaker 10 for projecting a 
tight and clean high quality bass sound, comprises a first housing 100 and 
a second housing 200. 
In accordance with this preferred embodiment, as shown in FIG. 2, at a 
front side of the first housing 100 having an access opening 111 with 
rectangular diameter, in which the access opening 111 is determined by a 
right opening edge 151A, a left opening edge 151B, a top opening edge 151C 
and a bottom opening edge 151D. At the right opening edge 151A of the 
access opening 111 having a right inner wall 161A continuing toward an 
inner back wall 171, whereby the left opening edge 151B of the access 
opening 111 having a right inner wall 161B continuing toward an inner back 
wall 171. The right inner wall 161A is connected continuously to the right 
side of the inner back wall 171 by a first curved vertical wall 181A to 
provide a smooth cornering within an inner chamber, as so as the left 
inner wall 161B is connected continuously to the left side of the inner 
back wall 171 by a second curved vertical wall 181B to provide a smooth 
cornering wall surface within the inner chamber of the first housing. At 
the center portion of the inner back wall 171 having two input outlets 
112A and 112B mounted thereon respectively for receiving any type of 
conventional output speaker wire. 
At the top opening edge 151C having a top wall 161C continuing toward and 
connecting with the top side of the right inner wall 161A, the first 
curved vertical wall 181A, the inner back wall 171, the second curved 
vertical wall 181B, and the left inner wall 161B, as so as at the bottom 
opening edge 151D having a bottom wall 161D continuing toward and 
connecting with the bottom side of the right inner wall 161A, the first 
curved vertical wall 181A, the inner back wall 171, the second curved 
vertical wall 181B, and the left inner wall 161B providing the inner 
chamber 180 of the first housing 100. At the middle portion of the top 
wall 161C and the bottom wall 161D, having a bolt size hole 119A, and 119B 
punctured therethrough respectively for nut and bolt lock 120A and 120B 
between the first housing and the second housing. 
At a center portion of the top wall 211A and the bottom wall 211B of the 
second housing 200, a screw hole 219A and 219B is punctured therethrough 
respectively for receiving the nut and bolt lock 120A and 120B. At a front 
side of the second housing having two sub woofers 210A and 210B with 
attached input wires 212A and 212B mounted on to front board by lock 
screws 5 in a vertical center manner respectively. Two wire access holes 
222A and 222B are also punctured in a vertical center manner respectively 
on the front board of the second housing 200. The rear portion of the 
second housing 200 is a half arc conceal chamber which help provide smooth 
sound wave traveling within the chamber. 
As shown in FIGS. 3 and 4 of the drawings, showing the first housing 100 
receiving the second housing 200 and the second housing 200 is lock in 
position by the nut and bolt locks 120A and 120B. Once the input wires 
212A and 212B is connected to the input outlets 112A and 112B, the audio 
inputs will be projected through the sub woofers 210A and 210B, and as the 
sound waves 30 travels forward directing into inner back wall 171, the 
sound waves 30 will be guided along the internal walls of the inner 
chamber 180 and focusing out through the side vertical pockets 330A and 
330B.