As An Experiment I Stuck A Few Things Under My Pre-Amp And Am Now On A Quest


My system is built out, got the pieces I want in place, and struggled a bit with how it sounds. With certain recordings it was sublime and with others it could be a bit sterile or mechanical sounding. These are all solid state components in a Salamander cabinet, and up to this point I have never been a fan of isolation devices with SS gear. Now with tube components I did use spike type devices under amps and preamps, so I have had a bit of experience.

Last night I rounded up a few wayward isolation devices I had from previous systems and thought I would experiment a bit. The pre-amp contains the DAC also, so I thought I would start here. Put in some Wagner type pads, and got a different sound with some improved focus but the bass was lean and a bit odd. But things changed. I tried some magnetic pods I had, no change with them.

Then as a whim I cut two sections of foam pool noodle I had laying around and put it under the front and back of the preamp. I oriented them lengthwise. Something fantastic happened here! I got spooky precise focus to instruments, the bass response became impactful, the sound is more relaxed...perhaps a bit too smooth but I will take this over that mechanical presentation any day. This is sounding very nice.

So, after dinner I decide to cut a third one and perhaps the bass gets better. I put it in and all the gains are gone, it sounds worse than the first set of Wagner pads I put in. The bass literally vanishes and the soundstage collapses. Pull it out and things are good again. I listen to disc after disc last night and am pleased with the sound. I am spinning vinyl this morning and still feel the same way.

So now I have a plan of action. On one hand I am content to leave the noodles in place and roll with that for awhile. It would be nice to have a permanent solution though. It seems like I am looking for a compliant solution. I remember Brightstar used to build a little shelf that housed a bike inner tube in it, and I think Townshend Audio also had a bladder type platform.

It would be interesting to know what products folks have used that functioned in a similar manner.

Thanks for sharing any thoughts or experiences.

neonknight

Showing 8 responses by mahgister

ghdprentice, where do you live?

I want the dog and the rugs and if you let the system there it will be ok ...

😊

You know that your mechanical control of vibration and resonance is right only when the qualitative change is perceived as astoundingly bigger than anything you waited for in timbre quality as in imaging and soundstage ( out of the speakers plane in depth and out by the sides of each speakers it is a recording dependant factor but very astonishing with 4 inches woofer and tiny speakers anyway filling a small room but li listen in nearfield with no comparison with any of my past headphones at all except the K340 who is at another quality level ) ... my bass go 50 hertz clear and extended because of my porthole retuning design with straws of different size ...

Forget simple metal spike ... Or anything simple ...

For me only heavy damping load on top passed some threshold of weight on my small box active two way speakers and under them sandwiches of mixed materials and minerals worked ... ( shungite plate-cork plate-oak plate-sorbothane plate-bamboo plate -many heavy granite plates , because these speakers are on my desk )...The damping load over them is near three times the weight of these 12 pounds speakers ..,.

Cymbals decay and clarity is a good sign ... Any boominess is a sign of unsuccess...A better balance between the frequencies with no compression ...

But the mechanical working embeddings control is not enough , you need EMI and electrical noise floor control , i take it with a good wall plug connector near the central panel of the house and my golden plate on all critical spots  ( shungite plate+copper) but all this is useless without an acoustically controlled room with good diffusion for my small speakers in particular and mechanical crosstalk small isolation with wood panels work for me but will not work for most because impractical ...😁 I live well with this impractical crazy panels separating each speakers from each of my ears  because i want good sound ...Most people will not go there ... ...

Some erroneously claim that we dont need acoustic control of the room in nearfield listening but they are completely wrong ... The sound speed in a very small room make any reflections acting on your ears perceptions almost as much as the direct or first wave ...

i did not know because of my old age ...😊

There is a seismic vibrations detector in the app store. No need for anything other than an iphone

I use a laser pointer to check for vibration and aiming my speakers. Tape a pointer on a component and aim across room to see if indeed there is any vibration present. The further you aim the beam the more it magnifies any vibration. With speakers I aim one pointer at zero angle to the tweeter and one at 90 degrees. My speakers are on wheels so I can see if larger drivers influence movement.  Works well and cheap. Results may suprise you..

Amazon.com: IVVTRYI Long Range High Power Tactical Green Beam Flashlight Laser Pointer rechargeableUSB Laser Pointer Cat Toys with Star Cap Adjustable Focus for Teaching Outdoor Hunting : Office Products

Interesting low cost experiment !

Thank you for the suggestion ...

Isolation devices are not often so good ...

Springs are complex to tune and better used with damping load and way better when we use two set of springs one set UNDER and one set above the speaker under damping load ... the damping load may be tune with a few grams approximation by ears ...I did it ...

Coupling and decoupling work very well but ONLY with a sandwich mix of plates , I use oak, granite,sorbothane,bamboo, cork plates , all together with astounding results ... Cost : peanuts ...

Sorbothane alone, springs alone or metal feet alone are not so good at all ...These PARTIAL solutions are deceptive and hide the problem ...

Most people as it is the case with the acoustic control of a room or with the electrical high noise floor of a house , or with EMI interference , most people had no idea how vibrations/resonance plague all audio system because they never adress the problem really and at best bought some feet made of a singular material composition ...It is not enough and deceptive solution ...

When vibration are under control the impact is huge not small at all , including timbre experience, imaging and even soundstage in my experience ...

Sorbothane or any singular material is "no so  bueno" by itself alone  ...

Only a sandwich mix to assure some coupling/decoupling set was efficient for me ...

For example feet of copper or any material is not good but with a sandwich plates including sorbothane plate , and granite, bamboo and cork and quartz  over them they work ...

The secret of the "sauce" is many ingredients together ...

Springs for example alone are not efficient enough the secret here is tuning the load of the compressive force under and above the speakers with springs compressed differently above and under with distinct damping load...

Sorbathane is no bueno.

Please tell me that this poster, with a self appointed unapparent knowledge in a one line post and who is a newcomer here, is not a troll ... Is it the birthday day of all trolls precisely today ? 11/11  at 2H23 minute the year 2023?

Please tell me this thread is a spoof. Is it April 1st already?

i tried a sandwich of coupling/decoupling/isolation minerals and wood and granite :

Granite plate -sorbothane plate-cork plate -bamboo plate-shungite plate- 4 small pieces of herkimer quartz as feet under ... ....

It worked for me ...You can try variation ... The recipe must include sorbothane plate ...

It work for me and all my gear are on a desk ...The speakers are also damped by heavy load compared to their own weight ...

The bass is 50 hertz depth and clear with no boominess ...It is amazing result for a speakers with 4 inches of woofer ... I also modified my speakers but it  is another story ...😊

I dont want to buy costly even effective product, i prefer homemade ...