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thanks alex.do you know how to tune the sub to it's f3 by using the adjustable ports,how do i know when it is correct. ps.how do i put pics into the thread

just finished a 7.2ft^3, 2x31/2" angled adjustable ports 15" dayton speaker and 250w amp.(i would post a pic but do'nt know how) It is my first attempt and now i want to set it up properly,i have never heard a good quaity sub so i have no reference to compare. By adjusting the port length how...

didn't think it was as complicated as that.

Thanks to both of you.Thomas how do i distinguish between open and closed cell foam?

Hi.has anyone any suggestions on a cost effective material to line the inside walls of my ported sub?. Do i have to line all the sides? why is this done,is it just to stop reflections of the sound waves? Just a thought,i have some wavy rubber underlay that we use under carpet in the UK(i don't...

The reason i am asking is that i am about to start my first sub build and i have been advised by various people with more knowledge than myself to use different size boxes. If i input the sizes in design programmes all that seems to happen is the f3 and box frequency change,i know that the...

well said kevin.Can you beleive it is beneath someone to give advice to a novice "who only wants to save money". Hi Anthony like you i am new to this,and i am in the process of building my own sub(shshshshsh: because it's cheaper but don't tell anyone)and have been scouring the net and forums...

I am very sorry for any offence caused.

Hi perry.Did you find out about stuffing or lining the walls of your sub? I am going to use the ported 7.5ft^3 adire plans and it says to use 64oz of polyfill,but i don't know if this means filling the insides or lining the walls. Any ideas?

If You Would Spend a Little More Time Reading The Question And Answering In Full Rather Than Worrying About Punctuation I Would Be Really Grateful. If Members Of This Forum All Purchased Books To Answer Questions There Would'nt Be Much Point To This Forum. Would There? Thanks For Your Input...

thanks thomas.sorry my question was'nt really clear enough i am new to this,i understand it is output at given freq but i can't relate it to anything they are just numbers. how do i know lets say for an example 16hz relates to 80db on the graph how loud is it is it good or bad.what is the freq...

hi,just waiting for parts to build my first sub.but could someone please explain the relationship between freq/db in the graphs of box design programmes,like what should i be looking for in the response line of the graph.whats good whats bad how do i read it?. next! my design was 8.1ft^3 ported...