New speaker named Lyra

jfrech

VIP/Donor
Sep 3, 2012
1,539
1
38
Austin
#22
Looks like there is 2 shells to the cabinet and they sort of slip them together and then add 150 pounds of elastomer... crazy.
That is true. So different method from YG and Magico that use bracing and lots of fasteners (bolts). Apparently Rockport is casting the metal, vs cutting sheet stock, then the 150 pounds of elastomer is the glue between the 2 shells.
 
May 30, 2010
14,139
83
48
Portugal
#23
That is true. So different method from YG and Magico that use bracing and lots of fasteners (bolts). Apparently Rockport is casting the metal, vs cutting sheet stock, then the 150 pounds of elastomer is the glue between the 2 shells.
Yes, both YG and Magico are using the technique used by Goldmund since long in their aluminum cabinets - critical bracing to damp the resonances. As far as I remember the first speaker I owned using a double box filled with elastomer between the two MDF boxes was the Dynaudio Contour 4 in the 90's.

BTW, I can not understand how most people forget about one of my favorite speakers - the Krell LAT1000 - when debating aluminum cabinets. I have heard some well known people telling that this speaker was too good to be designed by an amplifier manufacturer ...
 

asiufy

Member Sponsor
Jul 8, 2011
2,769
23
38
San Diego, CA
almaaudio.com
#24
YG uses the "double cabinet", or "speaker within a speaker" build method for the Sonja line, starting at $72k. I believe Magico does the same for the Q7s. I think Rockport added the elastomer to the design.

I actually heard the Sonja 1.3 and a Krell LAT1000 side-by-side, in a customer's room in Brazil, using an all-Krell (Evo One/Two system). He bought the Sonjas, while we're still trying to sell the Krell that we got in trade :)

I've always had great respect for Rockport, they've always captivated me. I can imagine this move towards aluminum will just make a great product even better!


cheers,
alex
 

LL21

Active Member
Dec 26, 2010
10,572
3
38
#25
Yes, both YG and Magico are using the technique used by Goldmund since long in their aluminum cabinets - critical bracing to damp the resonances. As far as I remember the first speaker I owned using a double box filled with elastomer between the two MDF boxes was the Dynaudio Contour 4 in the 90's.

BTW, I can not understand how most people forget about one of my favorite speakers - the Krell LAT1000 - when debating aluminum cabinets. I have heard some well known people telling that this speaker was too good to be designed by an amplifier manufacturer ...
i have heard good things about the LAT1000...but didnt Dan D'Agostino start out as a speaker designer? Also, its interesting, when i first saw some of those marketing schematics showing the inside of the Magico Q7, my first thought was that i'd love to see elastomers around some of that aluminum just to see what would happen. This was based on my (incredibly limited, amateur) experience with Stillpoints and HRS couplers (which have elastomers)...and which i now use together...Stillpoints Ultra 5s on ground, then HRS couplers, then component. I got clarity from Stillpoints keeping my equipment from floor but piano upper mids got a teeny, teeny bit thin (5%-type changes) and for some reason, i got tonal 'density' BACK when i added the HRS coupler.
 

joey_v

New Member
Nov 30, 2015
60
0
0
#26
Seriously this will be one bad to the bone speaker. I envy those who have the privilege of owning this one.

NO wonder I've seen a few Altairs and even an Arrakis for sale.
 

LL21

Active Member
Dec 26, 2010
10,572
3
38
#27
Rockport has now put up the Lyra on their Products section. Meanwhile, it is interesting to see they have REMOVED Altair..more to come presumably on Arrakis? Arrakis is basically 2 Altairs, one inverted and placed on top of the other...i wonder if we are going to see 2 Lyras, one placed on top of the other? Probably weigh 1100 lbs each speaker!


http://rockporttechnologies.com/lyra-01/
 

joey_v

New Member
Nov 30, 2015
60
0
0
#28
rockport has now put up the lyra on their products section. Meanwhile, it is interesting to see they have removed altair..more to come presumably on arrakis? Arrakis is basically 2 altairs, one inverted and placed on top of the other...i wonder if we are going to see 2 lyras, one placed on top of the other? Probably weigh 1100 lbs each speaker!


http://rockporttechnologies.com/lyra-01/
vewy interesting...
 

JackD201

[WBF Founding Member]
Apr 21, 2010
11,034
23
38
Manila, Philippines
#29
YG uses the "double cabinet", or "speaker within a speaker" build method for the Sonja line, starting at $72k. I believe Magico does the same for the Q7s. I think Rockport added the elastomer to the design.

I actually heard the Sonja 1.3 and a Krell LAT1000 side-by-side, in a customer's room in Brazil, using an all-Krell (Evo One/Two system). He bought the Sonjas, while we're still trying to sell the Krell that we got in trade :)

I've always had great respect for Rockport, they've always captivated me. I can imagine this move towards aluminum will just make a great product even better!


cheers,
alex
Rockport has been using the "filler" between shells since the first Altairs and Arrakis'. ;)
 
Jan 23, 2011
3,858
0
36
Amsterdam holland
#32
Very impressive, this could be the ultimate loudspeaker enclosure (and for a change, he is not just copying the competition), bravo!
Cannata why do you think rockport uses an elastomeer with an aluminium enclosure , are you telling me the braced aluminum of your favourite brand rings iow . is not perfect ?? lol

Its all about stifness /internal dampening , may the best combo win
 
Last edited:
May 30, 2010
14,139
83
48
Portugal
#33
Very impressive, this could be the ultimate loudspeaker enclosure (and for a change, he is not just copying the competition), bravo!
Anyone using speaker units, crossover and enclosures is copying the competition! :D

Most of the time, good engineering is not invention, but just just using the existing knowledge more adequately.
 

PeterA

Well-Known Member
Dec 7, 2011
4,957
40
48
North Shore of Boston
#34
Jan 23, 2011
3,858
0
36
Amsterdam holland
#35
Seems to me the drivers are mounted in the frontbaffle, this driver front baffle is a little bit recessed and then later receives an inlay of absorbant material for example wool felt , which surrounds the drivers .
Seems to be new enclosure design for rockport but rockports earlier housings were very sophisticated as well


Funny thing is that an enclosure has to be stiff and non resonant , and same goes to a certain degree for drivermembranes which then have to be light as well.
 
Last edited:
Jan 23, 2011
3,858
0
36
Amsterdam holland
#36
Why only (braced ) aluminium is not perfect imo although its very stiff , is because sound travels much faster in aluminium then air , you want a dampened material in which sound(vibration ) cannot travel (fast )and is absorbed
Aluminium 6320 M/S versus air 350 M/ sec versus rubber 60 m/s

https://www.nde-ed.org/EducationResources/HighSchool/Sound/speedinmaterials.htm


http://www.engineeringtoolbox.com/sound-speed-solids-d_713.html


You might also notice the incredible speed 12000 m/s plus , for diamond and berylium , no dampening at ll in those materials.

Ps and cast aluminium versus extruded versus solid plates will also differ with cast being better in that regard probably but i dont have the numbers
 
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spiritofmusic

Well-Known Member
Jun 13, 2013
6,420
70
48
E. England
#39
Nope, they remain v expensive spkrs wrapped up in v expensive packing cartons
 

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