Helmholtz as in the Argent Room Lenses I recommended to you a couple years ago..Great devices they are...stage shifters and shapers. Tom |
And now this..from the Wayback machine..same as it ever was
11-02-2016 4:57pm
When energy is applied to soft spongy materials that are used in combinations with springs supporting a loudspeaker, everything supported remains in a state of continuous motion. By doing so, this negates the operational efficiency of a voice coil as the coil itself becomes subjected to this secondary flexing. Ultimately, the voice coil drives the entire speaker assembly and has to overcome the added inertia presented by the motion of the springs and soft materials upon which the cabinet rests. The constant motion and flexing with this type of isolation device manifests inefficiencies within the operational design of the voice coil. Tom. Star Sound Technologies
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said this many times before.
If you have a time aligned speaker and the cabinet is allowed to move then the cabinet motion will be at 1 or more frequencies greater than the motion of the tweeter. As that happens the speaker will never be in true and proper alignment...
In the 80s Polk Audio had a Time Aligned speaker and demonstrated with a Laser Interferometer that when this speaker was unsecured the tweeter was never in alignment with the woofer. I cannot find the printed ad..
Tom
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from someone of like mind... Me..
12-18-2016 Springs add another boundary layer and introduce more interfering energy. The motion artifacts of the springs and resulting inertia when driven by the voice coil of a speaker need to be overcome by the voice coil. If you suspend all speakers from either above or below you have the same retention of interfering energy. And so is your sound. Tom
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tomic601..
Springs and floppy things allow the cabinet to retain information and resonance far to long. The cabinet is a passive radiator that transmits sound into the air along with the intended signal. The cabinet motion also becomes a part of the voice coil motion. The voice coil drives the cone but also has to overcome the force of the cabinet in motion even more so when suspended on springs or floppy thing mounted. More to follow. Tom |
If you look at the Townshend videos on You Tube there is one in a convention hall..and after they suddenly Cutaway from Jumping Jack Flash they show the speakers side by side..One speaker on the podium and one on points...there is 0 noise on either display. No seismic noise that day? No mechanical noise that day? No noise from HVAC no trains or planes or automobiles that day in a convention hall in a big city in England??? Wouldn’t there be environmental noise on the display at idle..so buy a $1400 platform that protects you from none of those occurrences..Now it may offer you a noise solution from playing rugby or basketball in your audio room.
The points appear to be generic like those that come packed with some Klipsch speakers compared to a $1400 platform..Great story telling and editing but they missed the 1 eye found.
Tom |
They say the same about the Sistrum products..I have been trying for years to have a qualified reviewer do a shootout between racks and or platforms..The only one that came even close was Norm Luttbeg of Stereotimes..He ran the gambit with many including active laboratory platforms that were 5k each then Stillpoints and then the Sistrum platforms. Tom |
I agree with both Roxy and Charles there should be a direct comparison. Tom
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Three easy payments..
The link you posted shows 2 pictures the one we know is the Miller dungeon. The room on the left is very attractive but will suffer from sonic issues caused by the double set of 90 degree angles on the ceiling. Those angles can be reduced with a resulting increase in performance..Tom |
There is always the Beauty and the Beast that exists in any audio room such from the member who builds his own rack and grossly overdamps with 400lbs of sand mixed with mineral oil..plus lead shot.. Nothing can launch or be expressed as music when placed in or on a dead weight like that. Tom |
Miller,
What is in my above post that would make you think it has anything to do with your rack or your room? Tom |
Stringreen,
I have designed a new end button for violin. Like my endpins for cello they are highly reactive and responsive to both bow and hand. Private message me if you wish to know more.. Tom |
Hello Stringreen,
Thanks for your consideration of the end button.
I know there would be a considerable hassle with the installation of my device unless a luthier was building a new violin or viola or had to remove the top to repair a crack or bass bar.
I feel there are many advancements for this device derived from my designs for audio coupling as well as my patents on endpins for cello and bass.
No right angles as these are detrimental for best sound transmission.
Gentle radius and curves only.
The top of the button facing the player has an inverted dome which focuses energy and directs that energy towards the player so they can more easily hear themselves and make any adjustments in touch with hand or bow.
The end button has many fine threads that secure the device to the end block, this provides maximum contact of the button to the instrument for best vibrational transmission.
The many fine threads provide for easy adjustment of the drop angle of the tailgut across where it contacts the recess of the end button. VTA adjustment provides a similar refinement and benefit when playing vinyl.
The end button is hollow and then filled with reactive materials and then sealed to contain the elements inside. This build design allows me to focus these materials precisely where the tailgut resides in contact with the end button maximizing sound transmission from strings to bridge onto the tailpiece.
The result of these features make for an instrument that is more stable where all the connections come together, more responsive to hand and bow, more easily heard by the player along with an apparent increase in both tone and volume into the playing space.
All these methods describe the benefits of direct mechanical coupling accumulated from my continuing audio journey and then reapplied to musical instruments.
Stringreen if you ever suffer the need to have the topside of your violin removed contact me and I will be happy to send you one of these end buttons. Tom |
Yea my room is freak enough yours is Plan Nine from outer space..I will send you pictures of the mechanical coupling devices we created at Starsound Technologies so you can create your pantomime version. Or look on line.. Keep up the good work and thanks for sharing your ideas and personal experience. Tom |
