the toobzAL5 Mk 2

The Mk 1s were very much an experiment. I needed an interesting pair of speakers to add to complete a hifi to use as my end of a swap. Most people really liked the shape and they do play music.

The next set are for my Mom (radio, tape, but mostly TV). When i move her up to 5.1 these should make good surrounds. Revisions planned for this set:

  • A longer tube -- the length of the Mk 1s was compromised while i was figuring out how to cut the PVC pipe accurately enuff.
  • Less resistriction at the terminus
  • A deeper insert into the pipe at the top -- The 1/4" i have in the Mk 1s i learned was too little as i glued the top back onto one of them a 2nd time.
  • A wider base with a shape more in harmony with the rounded shape of the toob
  • The copper tubes used for legs need to be inset more to accomodate the elastic on the socks
  • I won't puzzle coat the dust cap (i'd like to remove it, but there are issues with dust)
  • Tweaks on the tailoring of the socks.
  • I may finish them with a wood veneer (i have some 1/8" fir -- it would match her hardwood floor) and just have a cap over the baffle instead of a sock over the whole thing.

There are other ways to tackle the implentation of some of the construction of this speaker. Here are some i have thot of:

  • The bottom plate on the Mk1s main purpose is to provide a place to attach the legs/stand (althou it provides a clamping function on the bottom of the tube changing its internal resonances).

    One could add legs that attach to the outside of the tube -- i'm imagining a three-legged Buck Rogers rocketship kind of thing. Or drill holes and hang them from the ceiling. Let your imagination go wild.

  • Instead of rounding the top plate & rebating the midwoofer, the front of the baffle could be built-up with contoured layers of felt (you need something to keep the grill off the midbass)

I am also going to be using some 8 and 10" pipe to make some bass toobz (Nick's Tubular TLs are the inspiration) with push-push 8" drivers.


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