Decisions Decisions...DIYers....lend me your opinions!

VR3
VR3 Posts: 28,775
edited March 2024 in Clubhouse Archives
Alright, as per decussion with Jesse, I have decided to go with Poplar wood. Now, I have decided to go with the stuff at HD and Lowes, since it is baked dry....so it dosnt bow as easily, obviously I guess...

So here is my question...

This stuff is sold is 1" thick pieces, obviously it would be ALOT harder on me to plane this already good wood down to .5", underlay it with .5" thick plywood, then build a Poplar wood frame around the plywood to blend in with the front .5" Poplar wood...

And not to mention it would look MUCH better to do just a solid Poplar front baffle.

My question is prettttty simple...

Will this Poplar be thick enough to withstand vibrations and resonance? Since it will be only 8" wide overall, with only 6.5" being in the internal portion. However it will span a distance of 38.875" in height internally... with a height of 42" overall externally...

SO!!!! Will this be thick enough to withstand the vibrations and not color the sound? AND...if it will not, if I spray it with sound deadening spray...will it be good enough then?

Thanks for your much appreciated help...

Now I feel stupid for purchasing a whole sheet of plywood to use it for two braces, but I am SURE I will use it eventually...lol

On a side note - is this wood at HD straight enough to be worked with, IE - Is it gonna be bowed? A U? or anything weird? This will have to be laid flat and nailed down with zero problems...thanks!

Also, are the 8" wide boards - ACTUALLY 8" wide?? Lord, if it is...it would make my life so easy...lol

Thanks,
- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
Post edited by RyanC_Masimo on
· Share on FacebookShare on Twitter

Comments

  • BlueMDPicker
    BlueMDPicker Posts: 7,569
    edited April 2005
    Dimension lumber is nominal -- you pay for the wood lost to milling. A 1" x 8" nominal is 3/4" x 7 1/2" actual.

    I'll leave the rest of your query up to the wood experts.
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,775
    edited April 2005
    That blows...

    I mean *really* blows...

    I will have to buy the alot more than I need to do this, and then I will STILL have to plane it to get it down to 1/2"

    Starting to piss me off... why cant they sell like 9" or so??

    Ok, so now the questions change...

    Can Poplar + Plywood do all the above questions?
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • BlueMDPicker
    BlueMDPicker Posts: 7,569
    edited April 2005
    A 1 x 10 is 9 1/2.... that's "or so". ;)
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,775
    edited April 2005
    I didnt see any 1x10's for sell though...

    I saw 1x8's and 1x12's - I'll have to go by Lowes and see what they have another day I guess...

    *on the edge of patience sid*
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter
  • BlueMDPicker
    BlueMDPicker Posts: 7,569
    edited April 2005
    Rip the 12's to exactly what you want and use the rest for internal bracing and base struts. Waste not, want not.

    BTW - any sort of well conceived internal bracing should supply some measure of resonance control. The glue joint de-couples materials of the like density. And by base struts, I mean outrigger style base/legs. What's going to keep these from falling over easily or de-couple them from the floor as much as possible?
    · Share on FacebookShare on Twitter
  • VR3
    VR3 Posts: 28,775
    edited April 2005
    Well lets look at this here...

    1"x8'x1' is 2.61 a foot...
    1"x12'x1' is $5.00 a foot...

    If I glue two boards together... that will give me... 15"...

    I rip it down to 8" - this will leave me... 7" from, there I could proceed to glue ANOTHER board to it...

    And then rip it down to 8", which will leave me with.... 6.5" - At this point I have two boards ripped to the right size and I'm up to 3 boards... - so from here, I can glue ANOTHER board to that board... which will give me 14", then I can rip it down to 8" - will leave me... 6" (3 complete boards), 4 boards have been used thus far...) - from here...

    I would glue another board to it and I would have 13.5" and I would rip it down to 8" and I would be left with...... 5.5" - from here I would need eight .5" strips for the frame to go around the plywood... which is 4" - which would leave me 1.5" left of the board...

    Then I would have the left over pieces for the top frame... So now I am up to 5 boards, correct? A 6th board would need to be purchased for the top plates of this speaker, which would need to be 8" wide, so I would need to probally purchase another 48" long board... - So with 6 boards... all 48" long...

    I am looking at around $63.00 ($67.00 with tax)

    Correct?

    Man I lost count, is it 5 or 6 boards that will be needed?

    The internal bracing will be plywood (for the big one) and strips of MDF going down the lower chamber of the cabinet...

    The bottom of the cabinet will have 4 carpet spikes to hold it to the floor....

    I got a headache
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on FacebookShare on Twitter