My box is tuned to 30hz. I've been tryin to find a LP Filter at 30hz and cant find one. All I can find is the Harrison Labs 50hz LP FMOD. They have 20hz subsonic filter a 30hz HP filter but no LP. Does anyone know where i can find a 30hz LP filter or close to that? Thanks
Replies (6)
Buickman94 on 09/7/2003 15:32:42
I think you may be a little comfused as to what you need. What you need is the 30hz HP filter, not a LP. heres a link
http://www.partsexpress.com/pe/showdetl.cfm?&User_ID=15004826&St=5767&St2=-76130471&St3=74179041&DS_ID=3&Product_ID=16210&DID=7
ryan on 09/7/2003 15:47:57
i thought Lp filtered out the lows u didnt want and HP filters out the highs u didnt want. thanks for clearin that up before i made a mistake.
ttocs on 09/7/2003 15:49:23
you do want a lowpass filter, but certainly not 30 hz.. Not counting the rolloff on the x-over, there would only be 20-30hz that you would be able to hear. The tuning freq of the box/port does not determine the x-over freq. What size sub is it?
ryan on 09/7/2003 15:59:40
its the 12" brahma
Swez on 09/7/2003 18:58:26
OK, if you have a sub that is ported to 30 Hz, will need a HP filter to keep the sub from playing much material below the port tuning frequency, especially if you have a potent amp.
Most amps have LP filters for subs to block out highs to the subs. We generally recommend setting the LP filter around 80-100 Hz... depending on the full range speakers used.
To block the lows under 30Hz., you'll need a high pass filter that blocks below 30 and passes everything above that. This is basically called a band pass filter network. (30-80 Hz) is you band of frequencies to the sub.
The item mentioned by Buickman is correct... that is the filter set you'll need and just set the LP filter on your amp between 80-100 Hz... Viola... a bandpass filter is born.
Swez
http://www.partsexpress.com/pe/showdetl.cfm?&User_ID=15004826&St=5767&St2=-76130471&St3=74179041&DS_ID=3&Product_ID=16210&DID=7
ryan on 09/8/2003 21:51:00
Thank you guys for clearing everything up.
Replies (6)
Buickman94 on 09/7/2003 15:32:42
I think you may be a little comfused as to what you need. What you need is the 30hz HP filter, not a LP. heres a link
http://www.partsexpress.com/pe/showdetl.cfm?&User_ID=15004826&St=5767&St2=-76130471&St3=74179041&DS_ID=3&Product_ID=16210&DID=7
ryan on 09/7/2003 15:47:57
i thought Lp filtered out the lows u didnt want and HP filters out the highs u didnt want. thanks for clearin that up before i made a mistake.
ttocs on 09/7/2003 15:49:23
you do want a lowpass filter, but certainly not 30 hz.. Not counting the rolloff on the x-over, there would only be 20-30hz that you would be able to hear. The tuning freq of the box/port does not determine the x-over freq. What size sub is it?
ryan on 09/7/2003 15:59:40
its the 12" brahma
Swez on 09/7/2003 18:58:26
OK, if you have a sub that is ported to 30 Hz, will need a HP filter to keep the sub from playing much material below the port tuning frequency, especially if you have a potent amp.
Most amps have LP filters for subs to block out highs to the subs. We generally recommend setting the LP filter around 80-100 Hz... depending on the full range speakers used.
To block the lows under 30Hz., you'll need a high pass filter that blocks below 30 and passes everything above that. This is basically called a band pass filter network. (30-80 Hz) is you band of frequencies to the sub.
The item mentioned by Buickman is correct... that is the filter set you'll need and just set the LP filter on your amp between 80-100 Hz... Viola... a bandpass filter is born.
Swez
http://www.partsexpress.com/pe/showdetl.cfm?&User_ID=15004826&St=5767&St2=-76130471&St3=74179041&DS_ID=3&Product_ID=16210&DID=7
ryan on 09/8/2003 21:51:00
Thank you guys for clearing everything up.
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