3Ltriste13 Posted October 24, 2011 Report Share Posted October 24, 2011 (edited) Edited October 24, 2011 by 3Ltriste13 Quote YEEEEEEEEEEEEE Link to comment Share on other sites More sharing options...
AmericanLegend Posted October 24, 2011 Report Share Posted October 24, 2011 Actually, painting the port a texture more smooth than wood reduces the reynolds number of the duct, thereby reducing head losses inside the duct. This translates into higher pressures at the low pressure side of the duct as compared to the rougher duct. Also, a smoother duct resists transitions into turbulent flow more effectively than a rough surface duct. Once turbulence sets in, the boundary layer size is increased and effective duct area goes waaaaay down. All things considered, you should have your ports as smoooth as possible, but you likely will not hear the difference except in rare cases. Quote Link to comment Share on other sites More sharing options...
Maticus Posted October 24, 2011 Report Share Posted October 24, 2011 Actually, painting the port a texture more smooth than wood reduces the reynolds number of the duct, thereby reducing head losses inside the duct. This translates into higher pressures at the low pressure side of the duct as compared to the rougher duct. Also, a smoother duct resists transitions into turbulent flow more effectively than a rough surface duct. Once turbulence sets in, the boundary layer size is increased and effective duct area goes waaaaay down. All things considered, you should have your ports as smoooth as possible, but you likely will not hear the difference except in rare cases. Quote Link to comment Share on other sites More sharing options...
3Ltriste13 Posted October 24, 2011 Report Share Posted October 24, 2011 Actually, painting the port a texture more smooth than wood reduces the reynolds number of the duct, thereby reducing head losses inside the duct. This translates into higher pressures at the low pressure side of the duct as compared to the rougher duct. Also, a smoother duct resists transitions into turbulent flow more effectively than a rough surface duct. Once turbulence sets in, the boundary layer size is increased and effective duct area goes waaaaay down. All things considered, you should have your ports as smoooth as possible, but you likely will not hear the difference except in rare cases. x2 Quote YEEEEEEEEEEEEE Link to comment Share on other sites More sharing options...
fecupe2001 Posted October 24, 2011 Report Share Posted October 24, 2011 Yeah , that gave me a little bit of a headache lol, i guess smooth port is better on the meter then Quote I´m the SPL Gains topic creator!! wanna get louder?? check this: SPL Gains. Panamenian 2009 & 2010 & 2014 Bass Race 149.9 Champion! 2 15" subs and a 2K wired at 1 ohm, http://www.stevemeadedesigns.com/board/topic/167788-fecupe2001-2-15s-on-a-2k-video-on-page-3/ 8 Massive 15" subs and small power, http://www.stevemeadedesigns.com/board/topic/179296-fecupe2001s-8-15s-4th-order-bandpass-wall/ Link to comment Share on other sites More sharing options...
StrongmanDesigns Posted October 24, 2011 Report Share Posted October 24, 2011 Yeah , that gave me a little bit of a headache lol, i guess smooth port is better on the meter then yessir, my testing confirms better scores with a painted port. But all my ports are done glass smooth. Quote Link to comment Share on other sites More sharing options...
qcbangin Posted October 25, 2011 Author Report Share Posted October 25, 2011 ok, how would i get it glass smooth? alot of sanding? and what kind of paint? the AQ is actually out of the box right now(thanks to some dumb ass driver who turned in front of me from the wrong lane and got there car totalled, mine just the sub broke out of the box), so i am going to get the box finished. Yeah , that gave me a little bit of a headache lol, i guess smooth port is better on the meter then yessir, my testing confirms better scores with a painted port. But all my ports are done glass smooth. Quote Link to comment Share on other sites More sharing options...
StrongmanDesigns Posted October 25, 2011 Report Share Posted October 25, 2011 lots of sanding and high build / filling primer. mdf sucks up primer like a sob so I usually do 2 coats, sand up to 600 and paint. Quote Link to comment Share on other sites More sharing options...
qcbangin Posted October 25, 2011 Author Report Share Posted October 25, 2011 hopefully i can get started on redoing the box this week and i'm going to try that. Quote Link to comment Share on other sites More sharing options...
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