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Amplifier feet and racks
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morris_minor View Drop Down
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Joined: 27 Mar 2012
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Points: 6017 		Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 2:40pm
Originally posted by Sidman Sidman wrote:

So to sum up, which amplifiers (power, pre, phono stage, headphone) in a system should be placed on specialist racks and which ones can be sited on any convenient surface?
Assuming that the amplifiers in question are well designed and built.
Thanks for your honest expertise.
You may have answered your own question here! Wink

IMO there is as much b*sh*t talked about racks and supports as there is about other hi-fi components. I'm sure we've all idly browsed through hi-fi forums looking at pictures of other peoples' systems and seen mega-gear plonked on sideboards and Ikea units as well as cheap components residing on carbon-fibre or other extreme supporting structures. I think any decent electronic component only needs a solid, stable support to perform to its best. Turntables need more consideration of course, but generally common sense and an eye for what looks good in your room are the main determining factors that need addressing. Of course if you like the look of an exotic support then go for it! The vendors will happily take your money . . . 
Bob

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Accession MC/Enigma, Accession MM, Reflex M, Elevator EXP, Era Gold V
Solo ULDE, Novo, Lautus USB and digital, Libran balanced, CuSat50
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morris_minor View Drop Down
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Points: 6017 		Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 2:53pm
While thinking about equipment supports, does anyone here use cable supports - those little stands devised to keep cables off the floor, like having a line of mini pylons marching across the carpet? I guess their deployment is to minimise electrostatic charge going from the carpet into the cable? Are they effective?
Bob

Majestic DAC/pre-amp
Accession MC/Enigma, Accession MM, Reflex M, Elevator EXP, Era Gold V
Solo ULDE, Novo, Lautus USB and digital, Libran balanced, CuSat50
2 x Proprius + Spatia/Spatia Links
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Ash View Drop Down
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Points: 4334 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ash Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 2:53pm
You could tape Graham's DAC and amp products to the top of pneumatic drills or accelerate them all around on centrifuges (just for the hell of it) and I don't think you'd hear any loss of sonic performance, to be honest. Atomic/electron scale solid state electronics and macroscopic physics are at completely different orders of magnitude for the interactions to be significant IMO.

Edited by Ash - 16 Jan 2015 at 10:34am
We do not see things as they are. We see things as we are.
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tg [RIP] View Drop Down
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Points: 1866 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tg [RIP] Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 3:56pm

Quote While thinking about equipment supports, does anyone here use cable supports - those little stands devised to keep cables off the floor, like having a line of mini pylons marching across the carpet?

No, I don't - but if you wanted to try the idea this place has lots of things that look like they might do the job at relatively little cost.

No doubt there are similar concrete reinforcement products available in the old dart.

Knock yourselves out.
Tony G
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Points: 100 		Post Options Post Options   Thanks (0) Thanks(0)   Quote phildent Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 4:49pm
Interesting question,my twopenny worth.

1.Turntables. Good support for turntables essential.Seems to be true for suspended and non suspended tables.
2.Phono stages.Seems to have no effect on a GSP Era Gold V.However with my Croft valve phono stage it was essential.This bears out Graham's remarks since it also seems to apply to preamps and amps.
3 Amplifiers.No effect on Krell pre or power amps but again better for the valve preamps and amplifiers I have tried/
Speakers. Throw all your speaker stands away and suspend speakers by Dyneema cord.

I am fortunate to have a pair of John Bowers active Ones [30kg +]suspended by dyneema from C shaped stands.This is an idea I openly credit to a high end turntable manufacture from Southampton.Speakers of all sizes seem to improve tremendously from this.However this may not be the case on concrete floors as I have only tried it on my wooden floor, but I would be surprised if there is not an improvement.
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Points: 450 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LOINER Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 5:12pm
Originally posted by Ash Ash wrote:

I reckon that I could sit a Bitzie, Majestic, Solo ULDE or pair of Proprius on top of a spinning washing machine and not hear any difference in the audio output

Are not internal components Microphonic Ash, meaning the vibrations would be turned into small electrical signals and therefore spoil the audio signal,or have I been reading to much BS.
STUART
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Ash View Drop Down
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Points: 4334 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ash Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2015 at 5:49pm
You'll have to excuse me Stuart, my memory and understanding of physic principles are a little rusty but I will try to use some reasoning.

My mind is spinning trying to find somewhere to start.

Wave-Particle Duality, superposition and damping... I'm making no sense at all. Okay... Vibrations are longitudinal waves (although air/medium pressure changes are drawn as transverse waves) whose propagation is dependent on the medium properties. Electromagnetic radiation does not require a medium to propagate. Moves at the speed of light; have polarization and are transverse. Have an electrical component and a perpendicular magnetic component. Graham said that the electrical signal transfer is the speed of the electromagnetic wave, not the speed of the electron/s. Anyway, these field types are not affected by matter that does not exhibit either of these field types, which would otherwise interact with it. Electromagnetism is one of the four fundamental forces of nature...

Okay, put it this way, pick up a light bulb and shake it. Does it light up? No... Not even a little bit? No... Why not? Well...

Another point. A magnet can attract a magnetic item through uncharged matter as if there is no matter between them. Magnetism and charge are the only things that influence electromagnetic waves. Mechanical vibration is just kinetic energy transfer through the material. Matter doesn't interact with electric fields or magnetic fields unless it has a net charge.

Although there is absorption and re-emission processes that occur through matter as the medium so some of what I just wrote is wrong. Ouch


Graham, help me write a layman answer to this. I'm too stupid to do it on my own... Thumbs Down




Edited by Ash - 16 Jan 2015 at 10:37am
We do not see things as they are. We see things as we are.
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