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Old 3rd December 2012, 08:47 PM   #1221
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By the way, Dave. Is it supposed to look like this?
That looks normal... same as the dozen on my bench.

dave
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Old 3rd December 2012, 08:48 PM   #1222
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That looks normal... same as the dozen on my bench.

dave
Alright, I was a little worried because it was dark brown. I've been playing quite loud recently, hitting up to 93-94dB in listening position. Crossed over at 300Hz though.
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Old 12th December 2012, 09:04 PM   #1223
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?music: dMar-Kel70T

There you can see the latest progress. Soon finished!

Any ideas about finish? I don't want to paint them, I want to see the wood. But some kind of stain maybe?
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Old 12th December 2012, 09:41 PM   #1224
chrisb is offline chrisb  Canada
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?music: dMar-Kel70T

There you can see the latest progress. Soon finished!

Any ideas about finish? I don't want to paint them, I want to see the wood. But some kind of stain maybe?
ya gotta be careful trying to stain birch or maple veneer faced plywood - it's very easy to go splotchy - Dave can post some pictures of what a simple clear coat of lacquer can look like - a very "Euro" look if you like
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Old 14th December 2012, 11:03 AM   #1225
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If you have some scraps and feel like playing you could try using Zinsser SealCoat then a stain. SealCoat is just premixed thin de-waxed shellac about a 2lb cut I think. You can thin it more with denature alcohol if you like. Easy enough to make your own if you can get shellac flakes. This should help with splotching as will a gel stain. Remember - scraps first!
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Old 14th December 2012, 05:49 PM   #1226
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If you have some scraps and feel like playing you could try using Zinsser SealCoat then a stain. SealCoat is just premixed thin de-waxed shellac about a 2lb cut I think. You can thin it more with denature alcohol if you like. Easy enough to make your own if you can get shellac flakes. This should help with splotching as will a gel stain. Remember - scraps first!


bingo
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Old 17th December 2012, 09:04 PM   #1227
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The cabinets are almost finished now. Will do the 45-degree cut on wednesday at a local woodshop. The guys who owns it is building furniture, guitars and skis so he should know how to do it properly.

The birchplywood seems really sturdy. I had two friends over earlier today and I asked them to try knocking on the birchply cabinets and then on the particle board cabinets. It's a BIG difference, I will film it when I've done the angle cuts. Knocking on the birchply almost hurts your hands while knocking on the particle boards feels soft. The sound is very different too, the birchply make a higher frequency noise and much quieter while the particle board cabinets "boom" more, lower frequency and much much louder.
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Old 19th December 2012, 09:21 PM   #1228
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45-degree cuts done!
Pictures and a better decription at my blog ?music

It seems like I'm starting to build up a good contact network. It's very easy as a teenager to find older, more experience people, willing to help the new generation when it comes to audio.
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Old 19th December 2012, 09:53 PM   #1229
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45-degree cuts done!
Pictures and a better decription at my blog ?music

It seems like I'm starting to build up a good contact network. It's very easy as a teenager to find older, more experience people, willing to help the new generation when it comes to audio.


looking good - quite a journey from the first chip-board boxes - I hope you find they sound as good as they look


as to your blog comments about cleanness of cut - the total number of "knife cuts per inch" ( blade tooth count x RPM) + tip shape/angle + sharpness help determine the quality of finish -
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Last edited by chrisb; 19th December 2012 at 09:59 PM.
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Old 20th December 2012, 02:32 PM   #1230
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Spent around four hours today completing the speakers. First a rough sanding of edges to make them more even, used a 40's sandpaper. Then some finesanding with a 180's paper. Took about two hours to do all the sanding.

Then I spent another two hours eating some, soldering cables to terminals, screwing terminals, soldering cables to drivers and mounting drivers.

I haven't heard the Mar-Kel70 for a while, but I think there is a lot less bass. But the driver moves less too, seems like the cabinet is damping more now.

Anyways, it's nice to have the highs back. The speakers I've been using for the past weeks have had blown tweeters so there hasn't been very much action above ~2khz.
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