Lab 12 Based Offset Driver - Mass Loaded - Transmission Line (OD-ML-TL) Design by Bj - Page 25 - diyAudio
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Old 25th May 2013, 01:37 PM   #241
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by Zero D View Post
@ DrDyna

Group blocking ALL the bass together centered under the screen would be optimum, IF it works. Possibly with delay to match up with the mid/tops.

You could try the Gedlee approach though.

BUT, whatever works best, works

You might have to move

Keep us posted
They would fit laid down under the screen...and that's actually one I haven't tried yet.

That's today's project!
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Old 25th May 2013, 01:50 PM   #242
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I do have a MiniDSP, but I'm trying to get it as close as possible before I start using it. I've only got an EP2000, so I'd rather EQ through subtraction rather than have to boost anything, as I readily run into the amp's headroom and flick the clip indicators as it is.
Fair enough, I was under the impression a couple of kilowatts would provide enough headroom.

Are you driving it down at 2ohm per side, too?


Have you tried the age-old trick of putting the subs at your listening position and then walking around the room to find the best spots?


I'm back to hitting excursion limitations having discovered some music that has serious infrasonic content. Might be fun to try
The Fifth Element Track 2 Mondoshawan - YouTube
PS - skip to ~1 min and wait for the sweep down. I swear it hits single-digits.
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Old 25th May 2013, 03:39 PM   #243
DrDyna is offline DrDyna  United States
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Originally Posted by chris661 View Post
Fair enough, I was under the impression a couple of kilowatts would provide enough headroom.

Are you driving it down at 2ohm per side, too?


Have you tried the age-old trick of putting the subs at your listening position and then walking around the room to find the best spots?


I'm back to hitting excursion limitations having discovered some music that has serious infrasonic content. Might be fun to try
The Fifth Element Track 2 Mondoshawan - YouTube
PS - skip to ~1 min and wait for the sweep down. I swear it hits single-digits.
The Epic 12s are 2 coil x 2 ohms, so I've got them wired at 4 ohms, the EP2000 is somewhere around about 500 real watts per channel at 4 ohms. I've been flirting with the idea of another EP2000 so I can run each channel to each 2 ohm coil, even though the EP2000 turns into a bit of a hair dryer at 2 ohms.

I'll have to give that track a listen later
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Old 3rd June 2013, 04:22 PM   #244
DrDyna is offline DrDyna  United States
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I've arranged the subs at the back of the room, but I've noticed an interesting thing. I also put together a riser for one of the couches as a test, so I could put one behind the other in the center of the room. With nothing along the walls, I seem to have picked up some extra sensitivity. Cool!

So, these are a keeper for now.

So, then I was considering what to do with the empty prototype cabinet that I punched a bunch of holes through.

Hm, wouldn't that size of cabinet make a really beast center channel?

Why, yes it would. And the crossover was a snap because these subs are relatively flat, so I haven't bothered with the MiniDSP. Makes a dandy crossover for a 3.5 way center.
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File Type: jpg center.jpg (183.2 KB, 230 views)
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Old 3rd June 2013, 05:39 PM   #245
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NICE!!! Way to go on adapting a used enclosure for another function!
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Old 3rd June 2013, 06:21 PM   #246
DrDyna is offline DrDyna  United States
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NICE!!! Way to go on adapting a used enclosure for another function!


I have a habit of reusing cabinets if I can find something interesting for them...I've still got half a dozen empty cabinets kicking around here.

One question, I came across some 1/4 inch glass pieces that are pretty much the perfect size that if mounted in the side of the cabinets of the od-ml-tl would do a pretty fancy job of showing off the driver. Do you guys think a 1/4 thick glass panel that's about 5" x 12" would shatter if I were to route a lip and silicone it in there next to the driver?
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Old 4th June 2013, 06:53 AM   #247
Zero D is offline Zero D  United Kingdom
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@ DrDyna

Glad to hear things have improved Can we see a pic of the All bass together ?

You might like to use this soft

Design / acoustic related software for IApple.

If you do let us know how it goes.

I wouldn't use glass, or plastic, espessially in Bass cabs ! I doubt if it'll break though.
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Old 4th June 2013, 11:46 AM   #248
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by Zero D View Post
@ DrDyna

Glad to hear things have improved Can we see a pic of the All bass together ?

You might like to use this soft

Design / acoustic related software for IApple.

If you do let us know how it goes.

I wouldn't use glass, or plastic, espessially in Bass cabs ! I doubt if it'll break though.
Sure, I'll snag a pic in a little bit, I've gotta clean up down there some. There's an iPad here, but I've gotta ask permission before I put any apps on it...I usually refuse to use it because I hate it, I much prefer my Nexus tablet. I'll give the software a try and see what I can get from it.

As far as the glass, I'm pretty sure it's tempered. I have a third piece that I can whack with a mallet and see what happens. The resonance of it should be way higher than the subs play anyway. Worst that happens is I end up having to shop-vac the glass out and replace it with plastic.
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Old 4th June 2013, 12:53 PM   #249
DrDyna is offline DrDyna  United States
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Here's the final spot, and one of how close they are when you're on the couch.

I think I might try to make some woofer porn for youtube later.

Edit: Pardon the "not quite done" look of the room, I'm still working on it off and on.
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File Type: jpg finalspot1.jpg (28.8 KB, 209 views)
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Old 4th June 2013, 03:14 PM   #250
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Now that is a center channel, I bet it can keep up with most any mains. Nice! Glad to see the subs are working out. I have the movers packing my drivers tomorrow for the slow boat back to America, didn't want to keep them in the enclosures because they seemed safer in original packaging.
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