Looks like there is 2 shells to the cabinet and they sort of slip them together and then add 150 pounds of elastomer... crazy.
New speaker named Lyra
- Thread starter wgerman
- Start date
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.
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 ...
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
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
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.
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/
http://rockporttechnologies.com/lyra-01/
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'.
A video on the new construction methods. Will be interesting if this filters down the product line.
https://www.youtube.com/watch?v=f-TjOCuFZcU"]http://https://www.youtube.com/watch?v=f-TjOCuFZcU
https://www.youtube.com/watch?v=f-TjOCuFZcU"]http://https://www.youtube.com/watch?v=f-TjOCuFZcU
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
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Anyone using speaker units, crossover and enclosures is copying the competition!
Most of the time, good engineering is not invention, but just just using the existing knowledge more adequately.
Very interesting video. How are the drivers installed and attached? Does the front baffle insert come out?
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.
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.
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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
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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I´ve asked around the forums but to no avail, the Lyra´s remain a mystery wrapped up in an enigma.
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