Looking for pic of the dynamic dipole surround...

Sonnie Parker · « **on:** 21 Dec 2005, 01:31 pm »

Hey guys... I was wondering if anyone had a pic of the dynamic dipole surrounds... not the ribbon tweeter but the focal tweeter or regular tweeter.

Thanks!

James Romeyn · « **Reply #1 on:** 21 Dec 2005, 03:33 pm »

Sonnie
Your room is sweet. Congratulations on your accomplishment.

For whatever reason (probably just that he is swamped with other more important duties), B has not corrected the name of the speaker you mention. It is an absolute, unequivocal fact (unless he has changed the wiring recently), the so-called "Dipole Surround" is a bipole (in phase), not dipole (out of phase). When I take pics later today I'll snap a couple of my piano black SEs. They are for sale, list $1200, sell $690pr + UPS, 9 of 10 Audiogon Scale, owned a little over a year, purchased new direct from Mr. Big his sweet self.

I did a very simple direct change: I reversed the phase of the rear firing drivers, converting the radiation pattern into true dipoles. I worked for B for several years assembling speakers, the change was easy & direct, & easy to change back. For surround, dipole is better. As mains, you might like either way.

This speaker is voiced virtually exactly like all the VMPS neo ribbon monitors. Uncanny in it's ability to duplicate the RM30 sound.

Phone is 707 332 8691

Sonnie Parker · « **Reply #2 on:** 21 Dec 2005, 06:51 pm »

Thank you kindly Jim... of course that room is about to change drastically.

My RM30's x 3 across the front are on their way (they are satin black though) alonge with a pair of the "bipole" (that I'll probably make "dipole") Dipole
Surround SE's. Not to mention I have Earthquake Cinenova Grande 5 to power them... and I'll have two subs instead of one.

Had I known or at least checked around I might would have sprung for piano black in the RM30's and picked up your Surround SE's. I could just about saved enough on your SE's to add piano black to the RM30's.

BUT, although those piano black speakers are absolutely gorgeous, in my small home theater that ain't so fancy, they would probably be out of place. Not to mention the possible glare I'd get off of them. Now I'll have every speaker in satin black or a non-gloss type black... including the subs.

I appreciate you takiing the time to snap a shot of the pics. I'm very curious to know what they'll look like. I needed something smaller than those big (and expensive) Ribbon Surrounds, although if they would have fit would have been nice too.

James Romeyn · « **Reply #3 on:** 21 Dec 2005, 10:52 pm »

Sonny
If you intend to convert to true dipole use, you really will need a new pair of the tweeter diffraction masks. Virtually impossible to remove the tweeters without destroying the masks. B will probably be happy to mail you a pair of masks.

Sonnie Parker · « **Reply #4 on:** 21 Dec 2005, 11:59 pm »

Thanks for that tip!

ctviggen · « **Reply #5 on:** 22 Dec 2005, 12:37 am »

It is impossible to remove the tweeters without destroying the masks!

Sonnie Parker · « **Reply #6 on:** 22 Dec 2005, 12:51 am »

When you guys talk about masks... is this the felt covering on the outside of the speaker box?

Maybe the pics will help me undersand better.

Or better yet... maybe I can get Brian to have them go ahead and wire them dipole for me before they ship.

ctviggen · « **Reply #7 on:** 22 Dec 2005, 02:37 pm »

The "tweeter" includes moving parts housed inside a body. The masks are pieces of foam placed over the outer body of the tweeter. The foam forms a slot on the outside of the outer body. The actual moving parts of the tweeter reside in the area of the tweeter between slot. It looks like this: (| |), where the tweeter resides in the slot and each (| or |) is formed by the foam. The foam is placed on there after the tweeter is screwed into the speaker, so to remove the tweeter, you have to remove the foam. I did this and destroyed the foam.

jgubman · « **Reply #8 on:** 22 Dec 2005, 04:02 pm »

BrunoB · « **Reply #9 on:** 22 Dec 2005, 04:43 pm »

Quote from: RibbonSpeakers.net

Sonny
If you intend to convert to true dipole use, you really will need a new pair of the tweeter diffraction masks. Virtually impossible to remove the tweeters without destroying the masks. B will probably be happy to mail you a pair of masks.

Removing the tweeter would not be necessary if you would swap the tweeter cables (green and blue) at the crossover.

Bruno

Sonnie Parker · « **Reply #10 on:** 22 Dec 2005, 06:53 pm »

That picture above is for the Ribbon Surrounds which I've seen.

Thanks, but I'm looking for the Dipole (bipole) Surround SE's with the Focal tweeter.

John Casler · « **Reply #11 on:** 22 Dec 2005, 07:27 pm »

I might interject that before anyone performs a "bipolarectomy" and produces a "polar change" they may need to assess their needs.

A dipole speaker is "only" truly usefull if one can place it "exactly" on each side of the ear so that the "null" produced by the dipolar radiation will limit "direct" sound and create a diffuse soundfeild.

A bipolar soundfield is preferable for placements that do not allow a side placement with the null alignment.

Bipolar radiation is essentially a 360 degree (actually more like spherical) pattern of diffuse sound.

Brian has also stated that the "bipolar" setup also produces better bass response.

So unless you can place them on the null, there is little reason to change the wiring/polarity

Sonnie Parker · « **Reply #12 on:** 22 Dec 2005, 08:32 pm »

Glad to know that... mine will not be to the side so I think I may better just leave well enough alone.

Thanks!

James Romeyn · « **Reply #13 on:** 23 Dec 2005, 03:11 am »

Quote from: BrunoB

Quote from: RibbonSpeakers.net
Sonny
If you intend to convert to true dipole use, you really will need a new pair of the tweeter diffraction masks. Virtually impossible to remove the tweeters without destroying the masks. B will probably be happy to mail you a pair of masks.

Removing the tweeter would not be necessary if you would swap the tweeter cables (green and blue) at the crossover.

Bruno

Bruno
Thanks for reminding me this is why God invented forums! Great tip, as usual, thanks. I wish I thought of that earlier. A bit of soldering beats the phomy mess, which now looks like phome-eating termites attacked it, fer sure!

Everyone have a Merry Christmas. Thank Presidente Ulysses S. Grant for signing the law passed by the US Congress making it a federal Holy (excuse me, holi) day!

BrunoB · « **Reply #14 on:** 23 Dec 2005, 09:01 am »

Quote from: Sonnie Parker

Hey guys... I was wondering if anyone had a pic of the dynamic dipole surrounds... not the ribbon tweeter but the focal tweeter or regular tweeter.

Thanks!

I cannot explain why but my intuition still tells me that a 626R with a CDWG might be a better (and less expensive) alternative to a a [db]ipole surround.

Bruno

ctviggen · « **Reply #15 on:** 23 Dec 2005, 10:35 am »

Do you think so? That would be an interesting test. I'm planning on buying the dipole/bipole surrounds as I want a more diffuse sound for movies. My room is hard because I can't have rear speakers to the sides of my, where they're typically recommended. If I put them close to me and to the sides of the room, I feel the sound (even though coming from point sources) appears more diffuse than when the speakers are directly behind me and farther away. Unfortunately, my room is such that it's easier to put the speakers behind and far than to the sides and near. So, I was hoping the di/bipoles would be able to be put behind me (and up farther) yet provide diffuse sound.

Sonnie Parker · « **Reply #16 on:** 28 Dec 2005, 09:35 pm »

I think the 626's would be too big... not to mention and mainly too direct being as close to the seating positions as they would be in our theater room. I did consider those initially though.

Still no one has pics of the Surrounds. I'm surprised that VMPS would not have pics of all their speakers on their website. This is a pretty easy task... taking pics that is. (This also not meant sarcastic!)

ctviggen · « **Reply #17 on:** 28 Dec 2005, 09:54 pm »

Here's a not so good one:

http://www.vmpsaudio.com/blsspic.htm

Sonnie Parker · « **Reply #18 on:** 28 Dec 2005, 10:08 pm »

I've been assuming these are wall mountable... where might the binding posts be located?

I hope it's not the bottom... cause then I'm gonna have to figure out how to hide the connection and wires.

In reading the VMPS site it appears that may be the location though because they suggest using them as front monitors and I wouldn't think in that case anyone would want binding posts and speaker connections off the side of their speaker cabinets... however if they are originally intended for surround speakers they should really have the binding posts off the side to the wall with the speaker sides facing front and back and the side to the room finished accordingly.

Brian Cheney · « **Reply #19 on:** 28 Dec 2005, 11:29 pm »

Connects to the Dipole Surrounds are on the side of the cabinet facing the wall.