as usual whenever i need help im here
im trying to make active subwoofer im using 8" woofers in which i dont know any specs a bout it was a lot at good price and i bought them .
first i made Rod elliot 24 dB/Octave crossover "project 09"
Linkwitz-Riley Electronic Crossover
and used both TDA 7294 amp and STK 4191V amp
the problem is i cant get a clear good bass i don't know how to describe the sound but whenever the volume is down the bass is so clear and good but turning volume high i began to hear distortion and after changing the cabinet and port i got no distortion but bass not clear even f i replaced the woofer with another kenwood one it doesn't matter
i referred to some old jbl and jamo schematics and found they are adding a high pass filter "Subsonic filter" i did so with no much difference .
i've tried other crossover circuits with no noticeable difference
the only weird thing for me is when i tried that crossover on a 12" driver in sealed enclosure i got magnificent bass shaking really shaking my room with a great quality.
am i missing anything....i need help i have been for 2 months on that building different enclosures with different tuning and different crossovers and amps i got tired and almost frustrated😕😕 !!!
im trying to make active subwoofer im using 8" woofers in which i dont know any specs a bout it was a lot at good price and i bought them .
first i made Rod elliot 24 dB/Octave crossover "project 09"
Linkwitz-Riley Electronic Crossover
and used both TDA 7294 amp and STK 4191V amp
the problem is i cant get a clear good bass i don't know how to describe the sound but whenever the volume is down the bass is so clear and good but turning volume high i began to hear distortion and after changing the cabinet and port i got no distortion but bass not clear even f i replaced the woofer with another kenwood one it doesn't matter
i referred to some old jbl and jamo schematics and found they are adding a high pass filter "Subsonic filter" i did so with no much difference .
i've tried other crossover circuits with no noticeable difference
the only weird thing for me is when i tried that crossover on a 12" driver in sealed enclosure i got magnificent bass shaking really shaking my room with a great quality.
am i missing anything....i need help i have been for 2 months on that building different enclosures with different tuning and different crossovers and amps i got tired and almost frustrated😕😕 !!!
"... i dont know any specs a bout it was a lot at good price and i bought them ...
am i missing anything....i need help i have been for 2 months on that building different enclosures with different tuning and different crossovers and amps i got tired and almost frustrated !!! "
I have old speakers that when I measured them and put the numbers into winISD it says they need a very large enclosure and that makes them very impractical. (43.4ft3 / 1230L)
You can find the parameters yourself if you get ARTA, an external sound card, a 100 ohm resistor and an accurate weigh scale.
There are also ways to measure the parameters with a signal generator and an oscilloscope ( and a 100 ohm resistor and an accurate weigh scale.)
If you can't find the parameters online somewhere then even the size of your enclosure will be hit and miss...nor giving you what you want.
Or build a variable size enclosure where you slide one side in and out to change the volume...do the same with port tuning and you will have something to use that is not a one shot try.
Just my $0.02
am i missing anything....i need help i have been for 2 months on that building different enclosures with different tuning and different crossovers and amps i got tired and almost frustrated !!! "
I have old speakers that when I measured them and put the numbers into winISD it says they need a very large enclosure and that makes them very impractical. (43.4ft3 / 1230L)
You can find the parameters yourself if you get ARTA, an external sound card, a 100 ohm resistor and an accurate weigh scale.
There are also ways to measure the parameters with a signal generator and an oscilloscope ( and a 100 ohm resistor and an accurate weigh scale.)
If you can't find the parameters online somewhere then even the size of your enclosure will be hit and miss...nor giving you what you want.
Or build a variable size enclosure where you slide one side in and out to change the volume...do the same with port tuning and you will have something to use that is not a one shot try.
Just my $0.02
"DUG" your reply make me feel that its so easy to measure the driver parameters and build the appropriate box .... am i right and just dont have the know hw or i'm just imagining ?
if so ...if u have a link to a video or article
thanx a lot
if so ...if u have a link to a video or article
thanx a lot
SB acoustics have a Tech Note on it here: http://sbacoustics.com/18/wp-content/uploads/2018/05/Measuring-ThielleSmall-parameter.pdf
Is it more dismaying to see (A) someone post totally vague stuff like that or (B) to see people use their time replying?
Any opinions about how the forum could ensure useful descriptions? Perhaps a new forum for the posting and replying to vague stuff? Or forum rules?
B.
may be you shouldn't waste your precious time in this vague thread .. just leave or dont open 🙂