the 4th order is it correct?

Thawach

Member
2007-12-13 9:48 pm
hi all

i find this box, they tell 4th order i see the 2 port very bid in the front of this box. the specs use 18" driver. it make me surprise that why i can see the driver inside in the same line level. i want to know is it bandpass or bypass sub. i think it can bypass the high freq to outside. is it correct design?
 

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hi all

i find this box, they tell 4th order i see the 2 port very bid in the front of this box. the specs use 18" driver. it make me surprise that why i can see the driver inside in the same line level. i want to know is it bandpass or bypass sub. i think it can bypass the high freq to outside. is it correct design?
looking @ the pic i say its a 4th order bandpass with the driver reversed(propably to make the box less deep)
and yes you can always filter it outside the box.
images
 

Thawach

Member
2007-12-13 9:48 pm
friends a bit problem when i see this sub. it seems like bp6. but why behind the subwoofer they design like the horn but outside it has the port. i want to know the design can increase the spl output?:confused:
 

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Thawach

Member
2007-12-13 9:48 pm
surprise again! this box seems like bp4. i think why people like to build it. i simulate with HR und win isd. the respond freq seems peak a lot at the upper bass. all friends i want a lot of ur comments about this respond.thank u:)
 

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