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Get familiar with the reaction system: Introducing the Reaction System
New project - The Farvalpeas
As I mentioned in another thread I have started a new project using only Peerless drivers. It will be a small MTM, 11 Liters total. The woofers will be the 830855 4" SDS series and the tweeter will be the DA25BG08-06 aluminum domes. The woofers should be here later today. I bought the tweeters from PE when they were on sale for $25. Got started yesterday after work. It took just over one of those 11.5" x 8" x 5/8" Menards particle board shelf boards. These will be ported using some 2" ID CPVC conduit.
Comments
Simple box model. Not bad for a pair of 4" woofers.
Coolness! I'll have something to directly compare to when I get around to doing mine.
Odd. Around here cpvc is yellow'ish and regular sched40/80 white.
Same here.
InDIYana Event Website
I don't think you have to worry about PE stealing the name of this one.
This is not the CPVC you buy at the big box stores. It's from a national pipe supplier. Generally our CPVC is slightly darker gray than our PVC. We use it due to elevated temperatures (up to ~200 F). This is not the white stuff intended for drains and household water supply. My picture looks a little lighter because I sand blasted them and the cell phone camera flash.
The drivers showed up yesterday as expected. Cute little buggers! I broke them in for 5 hours last night. Will measure their T/S parameters after work today.
These 4 drivers measured within 1% of each other and within 5% of the manufacturer's published specs. Pretty typical of all my results using Peerless, SB Acoustics, and even Dayton RS series drivers.
Can you post the TS parameters you measured please.
Thanks.
Sorry Ken, just now saw your post. I looked but can't find them here at home. Must be at work. I'll post them when I get back.
Couple of progress pics:
Fixed pic
Fixed pic
Weird... I don't like posting pics directly from my phone. Somehow it edits out the background.
Kind of cool if you can figure how it works.
That sounds like a phone feature you can turn off
Actually kinda neat looking.
Agreed. While the selection tool is pretty fuzzy on the edges it does a great job of hiding the bloody bodies stacked in the corner, or whatever revealing details may be lurking there.
I thought maybe you neglected mowing in favor of building these speakers and just didn't want an overgrown yard to show in the background.
Try try again.
I see background!
Almost ready for measurements:
I've decided to complete the finish on the baffles and the finish on the boxes before I take all the measurements. Usually I throw them together naked just to get my measurements for the xo design and do the voicing. But then I dread having to take them all apart, remove the internal damping, remove the foam gasket tape that seals the baffles to the boxes, etc. This way I might be able to just remove a woofer or two to mount the xo's inside. Postponed gratification maybe?
lol That is normally how I do it. Or I would just wind up listening and never finish em.
I think I'll try solid wood baffles on my MTM too (though I'll have to order that in). I ve got a 2ftx4ft sheet of paper backed cherry veneer, but that wouldn't get me enough to do vertical grain on the baffle along with covering the other visible faces.
Baffles are done, boxes just need a final sanding then a couple of final color coats:
I really like the sort of "cinnamon" color the BLO/thinner/poly gives these oak baffles. Way better than the classic "Golden Oak" stain/gloss poly look. Thanks Dave Fred for the 1:1:1 tip! These have a satin finish which I prefer for oak.
How is the dry time on that 1:1:1?
With a box fan only about 12 hours.
Ready for MWAF...
You can tune the mix, more thinner will dry faster.
Add more oil and it will dry slower but have a more oily look.
Yes of course you are 100% correct. But I really like the simple baseline 1:1:1 ratio. I know everytime exactly what to expect (call me a non-adventurous person lol). If I end up wanting a bit more sheen then I will just give them a coat of furnature wax