Q logic bandpass port length?

 

Silver Member
Username: Kpa2727

Post Number: 108
Registered: May-07
i'm trying to figure out port length on a single bandpass for a 12 inch alpine type - r. it's a dual voice coil 4 ohm wired to 2 ohm. the fs is 29 hz the vas is 45 l {1.6ft} to the third. the box give me to ports each a foot in length. so i'm trying to find out how long to make each one to match my woofer. the link to the box is here
http://www.qlogic.ws/products/q_enclosures_detail.jsp?classID=55&categoryID=228& groupID=7929
 

Silver Member
Username: Kpa2727

Post Number: 121
Registered: May-07
not to be obnoxious but ::bump:: i really need to solve this one quickly !!
 

Gold Member
Username: Southernrebel

Monroe, Louisiana DD 9515d~~]...

Post Number: 5031
Registered: Mar-04
Sorry to say it man, but i would burn that box and build a ported box.

Try ~2cuft net tuned to 35hz for dialy...prolly sound 100% better than that prebuild bandpass.

W/ that bandpass box, you are going to get a big peak in SPL at ~55-60hz and nearly nothing in the 30hz-50hz range. But if you are going to keep that bandpass, just leave the ports 12" long for daily.
 

Silver Member
Username: Kpa2727

Post Number: 123
Registered: May-07
well i can return it but best buys gonna kill me lol i returned so much shite. but if i go with a q logic wats going to really slam it home?
 

Gold Member
Username: Southernrebel

Monroe, Louisiana DD 9515d~~]...

Post Number: 5033
Registered: Mar-04
a hammer.
 

Silver Member
Username: Kpa2727

Post Number: 124
Registered: May-07
ha---ha, but seriously i don't have any real box builders around here and money as u can see is tight bassiclly for a year i been playing with best buy's store credit. so my only real option is a q logic atm.
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