bassface Posted August 10, 2012 Report Share Posted August 10, 2012 your port length would be measured to the center of that angle. Link to comment Share on other sites More sharing options...
vrollin Posted August 10, 2012 Author Report Share Posted August 10, 2012 Ok I think what your saying is this; Centre line shown in green, Due to the angle, effective port volume highlighted in red, innaffective port volume highlighted in grey. Not doubting you, just trying to learn something new here, but why is it that it has to be measured from the centre line? Link to comment Share on other sites More sharing options...
vrollin Posted August 11, 2012 Author Report Share Posted August 11, 2012 If that design up above wont work, will this design here? (Would be so much easier if the boxes had a flat front...) Would there be any issues with this design? Should the port be off the side panel a bit or is it fine using the side panel as one of its walls? Any issues with the port not running the whole face of the front panel? Looks wise I would much prefer to go the design in the previous post but still not sure about if it will work regarding the comment of port length having to be measured from the centre of the angle....? Link to comment Share on other sites More sharing options...
RCP Audio Posted August 11, 2012 Report Share Posted August 11, 2012 What i think looks logical to do, is going by the 2nd to last picture (post 42) is that i would make two squares, one is the square you have in red, the other is double the grey area, you should be able to then use that to find out some sort of port area with some simple math. just a guess, im no expert PSN: Rcp_soundz Good rule of thump is go by what fuse size is being used in these amps. The higher the more amperage it pulls, this is what I look at. I'll stick a 300 amp fuse in a potato and sell it to you for $2k. 1991 Mazda 323VERY small build thread here: http://www.stevemead...23-small-build/ Link to comment Share on other sites More sharing options...
john253a Posted August 11, 2012 Report Share Posted August 11, 2012 there is nothing wrong with the design above #42 second drawing, you just need to know how to calculate it, to work out the length you use the centre of the port, its that east it not 100% since, but the worst you can be out is the max or min length of the angle, so +or- 1hz normally heres 1 i did for a vvx10 except the port runs the other way, its not that hard to calculate the difference even if the port size changes like this one does hence the 31.5-33hz, is the upper and lower, so tune is somewhere between Link to comment Share on other sites More sharing options...
RCP Audio Posted August 11, 2012 Report Share Posted August 11, 2012 Dont listen to me ^^^ that guy knows what hes talking about PSN: Rcp_soundz Good rule of thump is go by what fuse size is being used in these amps. The higher the more amperage it pulls, this is what I look at. I'll stick a 300 amp fuse in a potato and sell it to you for $2k. 1991 Mazda 323VERY small build thread here: http://www.stevemead...23-small-build/ Link to comment Share on other sites More sharing options...
vrollin Posted August 11, 2012 Author Report Share Posted August 11, 2012 Cheers mate, wouldnt happen to be able to shed some light on what I think was explained to me in post 42. Am I barking up the wrong tree there or am I understanding the comment about going from the centre of the angle? Link to comment Share on other sites More sharing options...
vrollin Posted August 11, 2012 Author Report Share Posted August 11, 2012 Dont listen to me ^^^ that guy knows what hes talking about haha, thanks any way for giving it a crack! Ive no issues with calculating the volume of any shape, its just wether the design for the port is actually effective in achieving the purpose... Link to comment Share on other sites More sharing options...
john253a Posted August 11, 2012 Report Share Posted August 11, 2012 post you meserments and ill work out what you have, but as i said, it not excact, it normaly going the be give or take 1hz, the yellow line is the length of port in this drawing Link to comment Share on other sites More sharing options...
RCP Audio Posted August 11, 2012 Report Share Posted August 11, 2012 Dont listen to me ^^^ that guy knows what hes talking about haha, thanks any way for giving it a crack! Ive no issues with calculating the volume of any shape, its just wether the design for the port is actually effective in achieving the purpose... well thats what i get for skipping to the end of a thread :L my bad PSN: Rcp_soundz Good rule of thump is go by what fuse size is being used in these amps. The higher the more amperage it pulls, this is what I look at. I'll stick a 300 amp fuse in a potato and sell it to you for $2k. 1991 Mazda 323VERY small build thread here: http://www.stevemead...23-small-build/ Link to comment Share on other sites More sharing options...
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