Ernesto Posted October 10, 2006 Report Posted October 10, 2006 Was wondering if anybody here that knows (for sure) the formula for tunning. For example if I have 20 cubes and want to tune to 35hz what would I have to do in order to know the length of the port...Feel free to throw in some examples. Quote
Ernesto Posted October 10, 2006 Author Report Posted October 10, 2006 you want the mathmatical formula? yeah*suck at math but im sure I'll figure it out sooner or later* :-[ Quote
Ernesto Posted October 10, 2006 Author Report Posted October 10, 2006 Off for the night...If anybody else knows it please post it. Quote
AP Zoutes Posted October 10, 2006 Report Posted October 10, 2006 If you have 20 cubes first decide your port area...16 sq" per cube = 320 sq" port = 20 x 16 (just an example) then you want port length for 35 hz = 20.25 " long (just use winisd for port length) but then you have a port displacement of 3.7 ft3 which needs to be subtracted and port length needs to be recalculated. then subtract 3 ft3 (rough guess) from 20 = 17ft3 change the port area to 272 sq" = 20 x 13.5 (example) the lenth will be 21.25". the port displacement will be 3.3ft3 -20 = 16.7 so change 21.25 to 21.8 = 35 hz what you end up with is a port that is 20 x 13.5 and 21.8" long (35 hz) and an enclsure that is 16.7 ft3 after port displacement before sub displacement Hope that makes sense and helps Quote
Forevrbumpn Posted October 10, 2006 Report Posted October 10, 2006 I love Bass Box 6.0 pro, and LEAP/LMS programs :^ :-* Quote I have a ritual called "terminator". I crouch in the shower in the "naked terminator" pose. With eyes closed I crouch for a minute and visualize either Arnie or the guy from the 2nd movie. I then start to hum the T2 theme. Slowly I rise to a standing position and open my eyes. It helps me get through my day. The only problem is if the shower curtain sticks to my terminator leg. It sorta ruins the fantasy.
AP Zoutes Posted October 10, 2006 Report Posted October 10, 2006 I don't want to type and try to explain all the math....I've been using winisd for a while to figure out port length.....If you want to learn the formulas involved get this book "Great Sound Stereo Speaker Manual" by David B Weems. I used this book for years. It took my about 3 or 4 enclosures to fully understand it. Now and then I will still pick it up for understanding...but winisd works great for giving port lengths Quote
meade916 Posted October 10, 2006 Report Posted October 10, 2006 also look into the "loud speaker design cookbook".....its a must have IMO. Quote All SMD products + MORE available at my store here! https://wccaraudio.com/ Subscribe to My Youtube Channel! Over 1,000,000 subscribers strong! Turn on your notifications! http://www.youtube.com/meade916 Follow My Instagram! Daily live feeds from the shop, exclusive content way before it hits my Youtube channel...and little squares with photo's in them http://www.instagram.com/meade916 The Official SMD Facebook fan Page https://www.facebook.com/SteveMeadeDesigns/ Follow my Tweet (Twitter) http://www.Twitter.com/meade916
Ernesto Posted October 11, 2006 Author Report Posted October 11, 2006 I wish I could actually use the bbp that I downloaded using a torrent. > Quote
AP Zoutes Posted October 11, 2006 Report Posted October 11, 2006 also look into the "loud speaker design cookbook".....its a must have IMO. I use to have that one but lost it :'( Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.