Gilmore - hows it done?

amt · 29th May 2005, 11:30 PM

I just got off the phone with a friend that heard a pair of Gilmores and hes in love. I did some research and it appears that they have gotten great reviews and aside from the cost, seem to be very straightforward.

Four woofers, one ribbon and a passive xo, all mounted on a piece of Corian. How can they perform so well without all the normal electronic equalizing and biamping etc and also be 90db efficient?? And shouldnt these be clonable?

amt

mwmkravchenko · 29th May 2005, 11:34 PM

It's a little hard to believe that they get the low end response that they claim without dipole EQ on the low end.

Mark

I_Forgot · 30th May 2005, 12:16 AM

I saw their ad in a magazine. Some geeky looking old guy and a young, shapely female with silicone balloons and some text about getting lucky.

It sure made me want to go out and get some!

I_F

amt · 30th May 2005, 12:48 AM

Yes, I believe that ad campaign wasnt the best way to sell $20K speakers, but Im interested in how he gets -3db @ 17hz with 91.5db using just a 4th order L-R passive xo. Passive eq?

http://www.glacieraudio.com/new%20Gl...081_eprint.pdf

amt

azrix · 30th May 2005, 07:15 PM

It's also VERY hard to believe that they can keep that low end response very loud. The woofer is going to be excursion limited very early that low, compared to the 120+ dbs they say it can do.

They use very high q woofers which allows you to sort of get away with not having an eq. There's and old Carver dipole that does the same thing. Talking about a Qts of around 2.0 or greater. No idea how well it works.

Ben.

moray james · 31st May 2005, 06:18 AM

Just for the record, they are very nice balloons! Regards moray James.

amt · 31st May 2005, 02:47 PM

I dont believe Ive ever seen a bass driver with that high of a qts. Ive heard the Amazing Loudspeaker years ago at the CES and very pretty impressed at the time. I would assume that high qts drivers are a custom build and arent readily available. And it looks like a B-G planar, similar to the Carver concept, is what is used. So it looks like those 12" woofers are key to the operation of the thing. If it truely sounds that good, it sure is a KISS design.

amt

Brian Beck · 31st May 2005, 03:42 PM

At 17Hz (and well higher in frequency too) with no enclosure to trap the back wave, those cones will be really pumping at extreme excursions! I doubt that really loud levels can be achieved down low with so much dipole cancellation, no matter how high the Qts is, and there's bound to be large harmonic production and compression going on. You can't fool Mother Nature.

These speakers may sound great despite these limitations - I don't know since I haven't heard them. And, yes, the balloons are very nice.

I_Forgot · 1st June 2005, 12:26 PM

by giving the marketing guy one to many martinis at lunch time.

I_F

Gregm · 1st June 2005, 05:21 PM

Quote:

Originally posted by I_Forgot
by giving the marketing guy one to many martinis at lunch time.

And /or by generating some inefficency with a low pass really low. Say 1st order @~20-30 Hz?

How sensitive is the B&G anyways (~88?)

29th May 2005, 11:30 PM	#1
amt diyAudio Member Join Date: Feb 2003 Location: oregon	Gilmore - hows it done? I just got off the phone with a friend that heard a pair of Gilmores and hes in love. I did some research and it appears that they have gotten great reviews and aside from the cost, seem to be very straightforward. Four woofers, one ribbon and a passive xo, all mounted on a piece of Corian. How can they perform so well without all the normal electronic equalizing and biamping etc and also be 90db efficient?? And shouldnt these be clonable? amt

29th May 2005, 11:34 PM	#2
mwmkravchenko Mark Kravchenko --- www.kravchenko-audio.com diyAudio Member Join Date: Jan 2002 Location: Perth Canada	No EQ???? It's a little hard to believe that they get the low end response that they claim without dipole EQ on the low end. Mark __________________ Mark

31st May 2005, 06:18 AM	#6
moray james diyAudio Member Join Date: Aug 2003 Location: Calgary on the Bow	How do they do it? Just for the record, they are very nice balloons! Regards moray James. __________________ moray james

31st May 2005, 03:42 PM	#8
Brian Beck diyAudio Member Join Date: Dec 2004 Location: South Florida, USA	At 17Hz (and well higher in frequency too) with no enclosure to trap the back wave, those cones will be really pumping at extreme excursions! I doubt that really loud levels can be achieved down low with so much dipole cancellation, no matter how high the Qts is, and there's bound to be large harmonic production and compression going on. You can't fool Mother Nature. These speakers may sound great despite these limitations - I don't know since I haven't heard them. And, yes, the balloons are very nice. __________________ Brian

1st June 2005, 12:26 PM	#9
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	How it's done... by giving the marketing guy one to many martinis at lunch time. I_F


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30th May 2005, 12:16 AM	#3
I_Forgot diyAudio Member Join Date: Jan 2005 Location: Phoenix, Az.	I saw their ad in a magazine. Some geeky looking old guy and a young, shapely female with silicone balloons and some text about getting lucky. It sure made me want to go out and get some! I_F

30th May 2005, 12:48 AM	#4
amt diyAudio Member Join Date: Feb 2003 Location: oregon	Yes, I believe that ad campaign wasnt the best way to sell $20K speakers, but Im interested in how he gets -3db @ 17hz with 91.5db using just a 4th order L-R passive xo. Passive eq? http://www.glacieraudio.com/new%20Gl...081_eprint.pdf amt

30th May 2005, 07:15 PM	#5
azrix diyAudio Member Join Date: Oct 2004	It's also VERY hard to believe that they can keep that low end response very loud. The woofer is going to be excursion limited very early that low, compared to the 120+ dbs they say it can do. They use very high q woofers which allows you to sort of get away with not having an eq. There's and old Carver dipole that does the same thing. Talking about a Qts of around 2.0 or greater. No idea how well it works. Ben.

31st May 2005, 02:47 PM	#7
amt diyAudio Member Join Date: Feb 2003 Location: oregon	I dont believe Ive ever seen a bass driver with that high of a qts. Ive heard the Amazing Loudspeaker years ago at the CES and very pretty impressed at the time. I would assume that high qts drivers are a custom build and arent readily available. And it looks like a B-G planar, similar to the Carver concept, is what is used. So it looks like those 12" woofers are key to the operation of the thing. If it truely sounds that good, it sure is a KISS design. amt

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