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Multi-Way Conventional loudspeakers with crossovers

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Old 18th April 2008, 07:07 PM   #91
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Quote:
Originally posted by klankymen
well, the 4" hole saw costs 20 bucks, I don't think I can build a jig + buy router bits for much cheaper than that...
also I'm not going to be drilling through veneer. It would seem to me like it would be faster to just center the drill bit, and drill down, than to route around the hole....

Hi,
This hole saw comes with a mandrel (the arbor that the hole saw screws on to)? Or do you already have one?
Also, it takes a pretty hefty drill to run a big hole saw like that.
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Old 18th April 2008, 10:50 PM   #92
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Quote:
Originally posted by klankymen
Hey, how are you going to make the hole for the midwoofer?
I was looking around at what tools I can use, and I was wondering if I could just use a 4" hole-saw to drill it, instead of using a router with a jig (one of these - just bigger). Does anyone know if this would work?
Yea, I'm going to use a 4" hole saw for the holes, have both the bit and the drill press necessary. You can rout it out, but using the hole saw is easier IMO.

Brendan
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Old 18th April 2008, 11:54 PM   #93
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Quote:
Originally posted by MJL21193



Hi,
This hole saw comes with a mandrel (the arbor that the hole saw screws on to)? Or do you already have one?
Also, it takes a pretty hefty drill to run a big hole saw like that.

yeah, its 14 bucks for the hole saw + 6 bucks for the mandrel. I'll have to look into what power drills we have available....


cyberspyder, thanks for the answer on that, maybe I'll try the same - as long as you guinnea pig it for me
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Old 19th April 2008, 12:21 AM   #94
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Tell you what, I'll test-fit the hole & woofer on a piece of scrap, and I'll let you know k?
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Old 19th April 2008, 03:51 PM   #95
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sure thing !

Now that we've started building, it's time for me to make a thread of my own, but one more question for you just occured to me... sorry if you mentioned it already - but why do you have 3 inductor coils? Zaph calls for 2, right?
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Old 19th April 2008, 06:04 PM   #96
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Yep, but we conversed about the Xover, because when I wanted to order the NT1 tweeter, madisound went out of stock, and I had to sub in the Dayton ND20-FB. We came to a revised layout, so that's what I used. Here's the post:

Quote:
Originally posted by Zaph
Ok, I've got an untested but simple crossover mod to use the Dayton ND20 with the ZBM4. Before I post, I'd like agreement of the following:

Don't blame me if it doesn't sound good.
Don't call it a Zaph design.
Do not distribute.
Report back here on the condition and packing materials of the ND20.

It will be available for a day then gone. Note that I won't be coming up with an alternate crossover for the ZDT3. That's a bit too expensive and risky for a modification that's essentially an unverified guess.

In box raw response differences - ND20 vs NT1

Response of ND20 and NT1 using default ZBM4 crossover

Response of the ND20 dropped into the ZBM4 with no crossover changes

Suggested crossover changes for the ND20 - Switch around the L-pad resistors and add an inductor before the filter to tame the top octave.

Hope this helps. This ends my participation in this thread, off to do other things.
It looks like he took it off...meh. Sorry, can't help ya.

Brendan
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Old 19th April 2008, 06:13 PM   #97
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k, that's allright, I got the original tweeter here - thanks for the info though.
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Old 21st April 2008, 07:41 PM   #98
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April 21, 2008
-Did all my dado work, and cabinets are starting to look like cabinets. Just missing the routing & holes, then I'm GTG for finishing.

Click the image to open in full size.
My coworker/friend/fellow student in the background

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Brendan
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Old 24th April 2008, 01:41 AM   #99
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This is really a tiny update, as I've just finished putting the second coat of tung oil on my sample piece, and boy is it smooth! I'm hoping after several more coats the piece will reach a semi-gloss finish, much better than polyurethane in my opinion. This coat was put on using 320 wet/dry paper and finished up with a rubbing using old t-shirts.

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Oooh reflective.....

Brendan
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Old 24th April 2008, 03:31 AM   #100
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Quote:
Originally posted by cyberspyder

Oooh reflective.....

Nyet, this is reflective:
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