Waveguide Question

John Casler · « **Reply #40 on:** 10 Jan 2006, 03:42 am »

Quote from: zybar

Quote from: CornellAlum
How was the cdwg perceived overall at CES? Did you win any more awards or anything like that?

D~

I haven't seen any comments or pictures yet in all the usual places:

AA
Soundstage
Enjoythemusic
Hometheaterhifi

George

We had lots of PRESS show up, in fact some like Clement Perry, Frank Alles, etc. came back a time or two.

The room was quite dark, and pics were difficult, but many were taken.

I couldn't even see my viewfinder, but managed to get this one to give you an idea of how it looked.

zybar · « **Reply #41 on:** 10 Jan 2006, 03:51 am »

I look forward to reading comments as they come out.

George

Butterfly · « **Reply #42 on:** 13 Jan 2006, 12:33 am »

Hi,

I don't see a 180 degree dispertion waveguide on those speakers / pictures. No doubt they sounded good and had a far better sweet spot than previously. However, no new invention to me.

JoshK · « **Reply #43 on:** 13 Jan 2006, 02:50 pm »

is the CDWG glued onto the front? if not how is it kept from rattling/resonating from the bass?

ctviggen · « **Reply #44 on:** 13 Jan 2006, 02:54 pm »

Butterfly, the wave guide is directly on the front of the speaker. The waveguide really is there -- it replaces the normal cover.

Josh, good point. However, I have the covers on my RM40s and I've never heard a peep from them. As the waveguide using the same attaching mechanism, I do not think the guide will rattle either. I'll let you know once I receive mine.

JoshK · « **Reply #45 on:** 13 Jan 2006, 03:00 pm »

the grills just have far less surface area for pressure to build up in, as most of it is empty. (fwiw, my question was just a curiousity, not a slam.)

ctviggen · « **Reply #46 on:** 13 Jan 2006, 04:55 pm »

Good point. I'll report back once I receive mine.

John Casler · « **Reply #47 on:** 13 Jan 2006, 05:06 pm »

Quote from: JoshK

is the CDWG glued onto the front? if not how is it kept from rattling/resonating from the bass?

Hi Josh,

I didn't feel any amount of "reasonance" from the woofers, since they are simply "fire through" in the forward plane and "equal pressure" to all surfaces in the lateral plane (which would equalize in a 360 degree pattern) They fit flush with the cabinet.

That said, it is certainly a good point to consider, and the device should be as inert as the rest of the cabinet.

ctviggen · « **Reply #48 on:** 13 Jan 2006, 05:26 pm »

John,

Any idea when the RM30 CDWG will be ready? I'd like to try it with my RM30C center channel. I already bought my HF Real Trap to damp reflections from the ceiling.

John Casler · « **Reply #49 on:** 13 Jan 2006, 05:34 pm »

Quote from: ctviggen

John,

Any idea when the RM30 CDWG will be ready? I'd like to try it with my RM30C center channel. I already bought my HF Real Trap to damp reflections from the ceiling.

I think Brian said they will be produced "after" Chinese NewYear (Jan 31st)

Figure in production, finishing and a little ocean cruise and we are looking at late Feb if nothing else gets in the way.

We are taking "pre-orders" now and pricing is listed in the price stickie.

Not sure about the "veneered" CDWG's yet, but Mark said he could not veneer the "whole" WG (due to specific angles and thicknesses) but could probably do "veneered inlays" on the front.

I am trying to get a list of available finishes.

JoshK · « **Reply #50 on:** 13 Jan 2006, 05:54 pm »

Quote from: John Casler

They fit flush with the cabinet.

That basically answers my question. Somehow I imagined they would be 1/8"+ out from the baffle.

RoadTripper · « **Reply #51 on:** 13 Jan 2006, 07:38 pm »

The VMPS pricing 'stickie' doesn't mention Passive Radiators for the RM40. Is that an oversight or are the passive radiators included in the listed price?

warnerwh · « **Reply #52 on:** 13 Jan 2006, 08:30 pm »

You must have missed it:

RM40 CDWG = $299 (shipping $35) for grill cloth version
(this version can be "upgraded" to a veneered version for $79 and shipping when available)
Passive Radiators =$84 (shipping $12)

John Casler · « **Reply #53 on:** 13 Jan 2006, 10:01 pm »

Quote from: warnerwh

You must have missed it:

RM40 CDWG = $299 (shipping $35) for grill cloth version
(this version can be "upgraded" to a veneered version for $79 and shipping when available)
Passive Radiators =$84 (shipping $12)

What Warner posted is correct, but no Seminarian didn't miss it, I just had already changed it after seeing this post.

I was making some updates last night, and must have accidentally copied and pasted over it.

Thanks for bringing it to my attention.

Bob Wilcox · « **Reply #54 on:** 14 Jan 2006, 12:05 am »

Quote from: John Casler

Not sure about the "veneered" CDWG's yet, but Mark said he could not veneer the "whole" WG (due to specific angles and thicknesses) but could probably do "veneered inlays" on the front.

I am trying to get a list of available finishes.

Please post pictures when available. Seems like it could difficult to match veneers finishes like African Ebony that have big grain variations. Maybe glossy black with some veneer inlays would look good.

Also interested in the procedure to convert the FST tweeters for CDWG EQ.

Thanks

Bob

Skynyrd · « **Reply #55 on:** 14 Jan 2006, 06:40 pm »

My RM40s have recessed (about 1/4") midrange panels. Will I want to space the panels out flush with the cabinet to have proper function of the CDWG?

I'm also interested in the tweether mod. Sounds like fun! Take stuff apart and try not wreck it in the mean time.

Are any of you CDWG users experiencing a warmer (less "hot" or "blaring") overall balance to the RM40's? I've got my midrange panels surrounded by 4" wedge foam (thanks to Casler, et al, of course!) to help tame the "heat" of these very fast and revealing midranges at present.

Thanks,
Skynyrd

Bob Wilcox · « **Reply #56 on:** 14 Jan 2006, 07:34 pm »

I have the CDWG for the the RM-40s. Last night I performed the tweeter mod described in another thread. With some minor level twiddling, the sound is much better than the results from my other CDWG tuning atttempts and more in line with the tonal balance prior to installing the CDWG package.

I don't think level adjusting the unmodded tweeter is sufficient to appreciate the full potential of CDWG.

Bob

YoungDave · « **Reply #57 on:** 19 Jan 2006, 02:39 pm »

I may have missed this, but what exactly is the CDWG "passive radiator" for $84?

James Romeyn · « **Reply #58 on:** 19 Jan 2006, 05:24 pm »

hey youngin'
Besides all the purely great audible improvements of the waveguide, two side effects presented: the midrange is attenuated 1.5 dB (easily fixed by increasing clockwise rotation of its level control, & a 6 dB per octave LP filter was introduced to the tweeter, with a 10 kHz pole.

B's earliest attempt to cure this treble filter was to change the bass performance to counter it & bring it back closer to the original tonal balance (the ear will perceive lighter bass as more treble extension).

Then our esteemed member Bruno posted his tweeter mod. It seems the tweeter has a horn, whose original intent was to flatten a hf rise & widen polar dispersion. The CDWG eliminates any need or advantage for the horn. When the horn is removed, the tweeter's hf rise is virtually the exact inverse of the CDWG filter. I have not yet done the mod & as yet do not understand exactly how it is done & any problems that may arise in performing it & getting the speaker to fully function properly.

I'm busy performing room acoustic & system upgrades to go with the CDWG's performance increases, even without the tweeter mod.

A reliable high-placed source at THE Show stated the VMPS speaker was probably the best speaker available under $10k, then immediately upgraded that to $15k. Other than the not-available VMPS RMX, I don't know what I'd get for $15k to replace mine (with a great sub), but I'd sure hope some competitor has something better for $15k! For the same size or smaller (accounting for the sub), I'd love to A-B this against anything, price no object.

In fact, that's exactly what I plan to do, after the room & equipment are sorted to reflect the speaker's capacity.

Brian Cheney · « **Reply #59 on:** 19 Jan 2006, 05:42 pm »

The RM/X is currently in stock at $14,900 plus TRT's if desired.