Gravity Well Of A DarkStar

ooheadsoo · « **Reply #240 on:** 13 Jun 2005, 01:34 am »

Ok, how about this...are there any dirt cheap drivers that I can try on cardboard baffles just to get a glimpse of how the b200 will sound when stuffed into the corners?

Dmason · « **Reply #241 on:** 13 Jun 2005, 01:45 am »

There is the inexpensive and excellent Ciare CH250 for $90/pair. Call at www.assistanceaudio.com Jack Arnott. Or, the Beyma 8/agn is also quite nice and is $18EU from www.spectrumaudio.de or try www.usspeaker.com and ask them about ordering some. These have a Q that allows them to work verrrrry well on open baffles.

I see the HiVi B3S could work on an OB and they can be had from Parts Express for $18 ea. HiVi drivers are of extremely high quality and value. I am using them for bass drivers in large transmission line cabinets.

ooheadsoo · « **Reply #242 on:** 13 Jun 2005, 02:06 am »

Well, $70-90 isn't my idea of a cheap test, so I guess that leaves the little 3" hivi drivers, hm. Seems like there won't be any bass at all, but maybe it's worth a shot anyway...What do you think, Doc? I fired off a quick email to usspeaker about the beyma.

Dmason · « **Reply #243 on:** 13 Jun 2005, 02:23 am »

I personally would deal some crack in the student's lounge, until I made enough to order the B200's. That's just me though.

I like the Beymas. Cheap and good. Everything that company makes is good. Those things somehow work in horns, boxes AND OB. Everyone who has heard them loves them. Bass response wouldnt be a problem because they sport an Fs=105Hz or so.

LymphNode · « **Reply #244 on:** 13 Jun 2005, 02:24 am »

Quote from: Dmason

Sealed it is then. Much better for satellites and sub. Wanna hear what that driver can do? Open baffle it. Get it?

Yes, "I get it."

I recall that your "commercial interests" required you to keep the dimensions of your OB proprietary. Really. Better clear that L x W with the Dept. of Homeland Security.

The open baffle would be alluring, but for its hideous dimensions, and I was just pitching in some alternatives. If there are people who want a garage door in their living space, I have no problem with that. Have at that ongoing development.

nodiak · « **Reply #245 on:** 13 Jun 2005, 02:25 am »

Do you have ANY driver pair you could take out of something, even the car? Just to get a feel for what happens when they are closer and farther to corners and walls may not require buying anything. Or a pair of $10 thrift store speakers would do. Don

powerbench · « **Reply #246 on:** 13 Jun 2005, 02:27 am »

Im calling Solen tomorrow see if they have b200s in stock......beat the rush

ooheadsoo · « **Reply #247 on:** 13 Jun 2005, 03:20 am »

I don't have any spare full range speakers handy

Oh well, it may be better for me to wait on it anyway. I'll think about those hivi 3" dinkies or maybe just go buy some cheap car speakers.

Dmason · « **Reply #248 on:** 13 Jun 2005, 03:36 am »

Ooheadsoo

Why dont you just wait on it, take the lumps of the unfortunate accident, (sorry to hear,) and hang with this stuff while we play around with it. I personally am still stuck on the corner loaded idea with waveguides, though I somehow think it may be too complex and less effective.

The "garage door" status of width is done away with easily by using acrylic or polycarbonate baffles. My Lexan ones, stuffed into the corners do not draw any attention to themselves, at all. In fact, they look very cool, people commenting on how modern and artistic they are, to my surprise. They are far LESS obvious than the average size floorstander speaker.

To see some Lexan baffles, go to the Gallery where Toby White has posted his Phy-HP OB's with big Lexan baffle. He is using a ClariT + PuriT with DaCT active linestage and phono, and like me, is for once, stuck on this combo. His baffles are quite abit larger than mine, which are 1050 X 650 mm and you will see they are in no way obtrusive. He tells me he has a pair of Visatons on the way. I look forward to hearing his comparisons of the two.

nodiak · « **Reply #249 on:** 13 Jun 2005, 05:40 am »

ooheadsoo, don't need fullrangers for the test. Yes a pair of car coax's would give an indication. Aren't you just trying to get a feel for effects of corner proximity?

ooheadsoo · « **Reply #250 on:** 13 Jun 2005, 05:59 am »

The most critical thing I want to test for is the palpability of the images when the dipole is corner loaded with maybe cotton or fiberglass stuffed behind the triangular baffles - whether they are 2d or 3d. And sound stage. I figure this kind of stuff needs full range to really develop the whole picture.

Dmason · « **Reply #251 on:** 13 Jun 2005, 06:25 am »

Car coaxials would likely give an idea; this is why I suggested the Ciare CH250. They are actually intended as car speakers. For what kind of car would Ciare think a 10 inch bicone speaker might go into I do not know, but at their price, they are about the same investment as just about any other questionable quality coaxial that one would find listenable, but would give you a very big, ten inch idea of what to expect. I have a strong impression that the average 6X9 oval coax might not move enough air to be efficient. With the Ciares however, you get really, really sweet results, and no tweeter is needed, and they do great bass, all considered. They are astounding, true music makers, for the dough, and moving air is their specialty.

If my son hadn't "liberated" mine, I would be glad to send them up to you.

ooheadsoo · « **Reply #252 on:** 13 Jun 2005, 06:39 am »

Yes, I thought 10" car speakers were quite...unusual. Thanks for the thought, Doc. Unfortunately, the Ciare are too expensive for a mere test. I would feel bad if I didn't live with them for a while or find some other use for them (I can't think of any) and I know I couldn't live with them knowing that the b200 is still out there.

Unless you tell me that the Ciare can do 30hz bass if I load it into the corner!

Well, there's still the issue of having these huge 10" drivers straddling the corners of my room

ooheadsoo · « **Reply #253 on:** 13 Jun 2005, 07:50 am »

http://www.linkwitzlab.com/faq.htm#Q30

Q30 here addresses the corner issue. I sure don't understand the experimental implementation shown, however: http://www.linkwitzlab.com/images/graphics/corner-dp.gif

Q31 has information about dipole setup that is beneficial to all. It also has some interesting cardioid information which will be interesting to all who are also interested in the corner mounting.

Seems that pure dipole is best and cardioid comes in second place. Can it still be worth a shot? I suppose I'll be the one to find out - eventually.

tyee · « **Reply #254 on:** 13 Jun 2005, 02:24 pm »

Wait time for B200 is 3-4 weeks as of right now guys. Get your orders in now!!

Vinnie R. · « **Reply #255 on:** 13 Jun 2005, 02:27 pm »

Quote from: tyee

Wait time for B200 is 3-4 weeks as of right now guys. Get your orders in now!!

Just ordered them! A clear Lexan baffle is next...which I can have made locally

I can't wait!

Dmason · « **Reply #256 on:** 13 Jun 2005, 10:02 pm »

Clear Lexan baffle. Mmmmmmm. That sounds very nice. Use some clear Lexan rods for props, set up toward the corner, adjust to taste, and let er rip.

The smoothness of the Monica II sound, along with the slightly tipped up bass of the 6 Ohm rated Teac, with added 30 watt PUNCH, and the steady 6 Ohm load of the B200 all come together into an unreal accident. You cannot believe what kind of sound I am getting with this dead simple method. This in my mind HAS to be the best quality sound, in a rather unusual combination, that could possibly be had for the investment, which, overall is just ridiculously low. I'm talking World Class Sound here...

I haven't used the DEQ since I installed the Teac, and the Monica has really matured over the last several days. So, Even Less = Even More.

tobyw · « **Reply #257 on:** 13 Jun 2005, 10:39 pm »

I can't believe what I have done! I have a pair of B200's arriving next week and will make adapter plates to use the 8 inch B200's in my 12 inch PHY-HP lexan baffles. I was happy until I read this thread, at least so I thought. And now I have to send Vinnie the Teac amplifier which arrived last week for the battery / cap mods.
The Clari-t with it's lack of bass blended so well with the creamy sounding PHY-HP's and now I have to go with a bass heavy Teac to go with the B200's that roll off the lower octaves.
I have lived with the PHY-HP's for the better part of a year and a half, so it will be interesting to see the difference between the combinations. I am concerned that if the B200's trounce the PHY-HP's as the B200's are 1/10th the price of the french drivers! But I guess we are all discovering that money spent has little to do with the quality of music reproduced.

Yu · « **Reply #258 on:** 13 Jun 2005, 11:00 pm »

Quote from: Dmason

Ooheadsoo

The "garage door" status of width is done away with easily by using acrylic or polycarbonate baffles. My Lexan ones, stuffed into the corners do not draw any attention to themselves, at all. In fact, they look very ...

Hi (Q :-),

Are the 1050 X 650 measurements for the pic in Gallery, Dmason, or your corner ones? Toby's look beautiful. Any advice on driver mounting techniques (Lexan), positioning, etc? Also, if anyone needs to ameliorate the WAF of large pieces of plastic in the living room, I found a company while surfing yesterday (www.lumicor.com) that makes acrylic sheets with embedded fabrics, grasses, metal mesh, etc, very Architectural Digest. Might be good for "significant other" approved OBs.

Dmason · « **Reply #259 on:** 13 Jun 2005, 11:24 pm »

Yu

the 1050 X 650 is what Norbert and I came up with, shaving an inch or so at a time. It gets the most out of the least (area) it would seem. Then you can add DEQ and lift the lower register up. As Mxgsr points out, you can really do "stupid" things to the FR of this driver without inducing modulation of upper bandwidth and absolutely without induced distortion.