Project "U-Turn" in progress
05-26-2005, 09:04 AM
#12
1000 Watt CAFz'r
Join Date: Jan 2005
Posts: 1,151
^^^^ Same with my car, even where the subs and/or ports are placed makes a difference in the fequency... If I fire my port to the trunk or the side of my trunk then it's 48-49hz, but when I fire it into the cabin it drops to 42hz. Its the wierest thing and can only be found by testing.
05-26-2005, 09:22 AM
#13
500 Watt CAFz'r
Thread Starter
Join Date: Aug 2003
Posts: 587
Originally posted by Prolifik:
Dan how do u know your car will peak at 53hz? I would not rely on other guys with same car even. My 2001 jeep peaked at 48hz but the SAME JEEP only a 2004 model peaked at 52hz. Boxes that were loud in the older one sucked veeeeeeeery bad in the newer one.
another thing, if your car does peak at 53hz u should probably tune alot lower, like 45hz maybe or less. most hatch boxes should be tuned 7-10hz lower than the car's peak, that is the starting point anyways. So if i was you i would make the port longer instead of shorter.
once u get subs/amp bring it over to Chris' place and we can figure it all out.
Dan how do u know your car will peak at 53hz? I would not rely on other guys with same car even. My 2001 jeep peaked at 48hz but the SAME JEEP only a 2004 model peaked at 52hz. Boxes that were loud in the older one sucked veeeeeeeery bad in the newer one.
another thing, if your car does peak at 53hz u should probably tune alot lower, like 45hz maybe or less. most hatch boxes should be tuned 7-10hz lower than the car's peak, that is the starting point anyways. So if i was you i would make the port longer instead of shorter.
once u get subs/amp bring it over to Chris' place and we can figure it all out.
05-26-2005, 11:21 AM
#15
50 Watt CAFz'r
Join Date: Apr 2004
Posts: 343
When the golf at finals liked 53hz, the box was an L port ... it also faced upwards towards the back window. I have no clue to what firing backwards will do. Peter may know with all of the testing that he has done with his car.
