Slim THTLP

[JensToft91]

Hi all.

The project is a go.

I got my wood sawed by the store - as I thought they could make the cut more precise than myself. Well. Lesson learned. Don't do that.

It's not too bad though, and I believe I can fix the minor issues as I go along.

My biggest problem is, the main plate, where everything attaches to, decided to bend backwards. As far as I can see, there's only two parts that straighten the sides - and they are both in the same end.

Any tips?

[JensToft91]

I used a piece of scrap wood, and straightened it out. I placed it in the horn-mouth, so I can remove it when it's finished.

[DaveMacKay]

It depends on how bad the warping is.

• If the warping is relatively minor, I think that the approach you've taken will likely be OK. Also, adding the panels and other side will help to force the side into shape.

• However, if the warping is extreme, you may want to discard that piece and cut a new one. I understand that you're looking to keep the cost of the build down, but buying a new sheet of plywood will be less costly than ending up with a bad subwoofer and having to redo it.

[Seth]

Hi all.

The project is a go.

I got my wood sawed by the store - as I thought they could make the cut more precise than myself. Well. Lesson learned. Don't do that.

It's not too bad though, and I believe I can fix the minor issues as I go along.

My biggest problem is, the main plate, where everything attaches to, decided to bend backwards. As far as I can see, there's only two parts that straighten the sides - and they are both in the same end.

Any tips?

Awesome Jens! I didn't expect it to begin so soon. Good for you

My experience with having the lumber yard cut down sheets is; the equipment is great and very capable of doing a really good job. But, the blade is nearly always dull and the employee making the cuts thinks ½" off is close enough.

Follow the plans instructions for dealing with warpage. As it comes together, it'll straighten out. Honestly, I'd rather have a warp in the sides than in the panels.

[JensToft91]

The support I made is working pretty well. I'll post a picture of it when I get home.
I was very clear about the precision at the lumber yard - it was the saw. Most of it is the same width - but some of the boards is narrower towards the end. Like the sheets tilts when the saw approaches the end. Plus, the cuts themselfs are very slightly curved - so the board have the same width thoughout - but is curved "lengthwise". But I believe it's doable.

Couple of pics of the curve attached.

Driver for scale (another 12 inch)

[DaveMacKay]

I think you'll be fine.

Good luck with the build.

[Chris_Allen]

When you secure the side, you should be able to pull that curve out as long as you secure with screws. If you use a nailer, you might have a hard time getting air tight.

Be careful if you have to cut the curved sheets, it can cause chaos with an angled edge.

[JensToft91]

It's starting to take shape! Panel 5 was a struggle. I ruined my saw-sled, because i forgot that the saw was set to a 7-deg angle from the previous cut.
The panel is not super straight - but I'm sure it's airtight. I don't think it will cause any problems

[JensToft91]

When you secure the side, you should be able to pull that curve out as long as you secure with screws. If you use a nailer, you might have a hard time getting air tight.

Be careful if you have to cut the curved sheets, it can cause chaos with an angled edge.

I'm using all the screws i feel that's necessary.

How does the curved sheets affect the angled edge? I'm using a saw-sled- so the panel is always pressed flat during a cut. I can imagine the problem on a table-saw though

[JensToft91]

Close-ups

[Seth]

Looking mighty fine Jens You're nearly on the home stretch! Nice job.

I'm anxious to hear your report of how it compares to your TT.

[JensToft91]

Thanks!

Me too. I'll post side/side measurements when it's completed

I ran out of my PU glue, and went to buy a new one. This one expands a hell of a lot! Now I get why people say "I don't like PU. I makes me puke".

[JensToft91]

The driver will arrive in march. So I need a bit of patience though.

[jimbo7]

I ran out of my PU glue, and went to buy a new one. This one expands a hell of a lot! Now I get why people say "I don't like PU. I makes me puke".

What are you using? Most of us here us Loctite PL glue. It expands some but not anything like a foam does. The smell isn't anything noxious but it will ruin anything it touches.

[JensToft91]

It's Danish, so you probably can't look it up.

I have attached a picture of it, where you can see the new (Very foaming) glue line applied outside of the joint to seal it. You can also se a glueline of the old, less expanding glue.

Should I but something else?