Townshend Springs under Speakers

if the speaker is on solid ground, 3 spikes is preferred.

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That's the problem there is no such thing, the actual floor becomes a transmission medium and delivers a signal out of time with the actual driver's delivered signal via AIR.. The floor no matter the medium (unless it was 1/2 thick rubber) will deliver a signal at two different times to YOU in the seated position. SPIKES cause it, decoupling stops it.

12" thick concrete is not thick enough, maybe on 4 foot center 12" x 60" friction piers. A 12" thick slab and a 1/2" of rubber.. Drop the speaker on that..

For the best results ALLWAYS decouple, mains and subs, one from the other, and the room surfaces and boundaries.. There is no exception.

Spring, pods, innertubes. There is more than one way to skin a cat..

Regards

It’s simple to understand and it was understood in the 80s buy two prominent speaker builders at the time, Carver, and VMPS.

They both understood that cabinet resonance transferred to a common medium will induces a third passive driver. There is no way to USE the signal without introducing a serious timing issue between the air being pushed from the drivers, vs the arrival time of the floor, walls. and ceiling. The floor is quicker..

Smearing happens by funneling all the different frequencies into ONE common medium, (via spikes)

What I learned from Brian Cheney and Bob Carver is the term BASS cohesion. The second is BASS propagation

The signals that were being transferred to the floor are now stopped.
They decouple, easy fix. BUT we don't raise it to much because of bass LOSS, WHY? Bass uses boundaries to GROW or propagate. YOU will hear the bass from that speaker go DOWN in volume, ACTUAL volume..

Cabinets do not move if they are made for one thing BASS.

The monitors can’t move because they weigh 425 lbs each and the BASS is in a different cabinet..

We help a CABINET dissipate the vibration a few ways. No bass in the monitor cabinet and narrow the baffle face to reduce the collection point for second hand bass.

In the bass cabinets use sound coat to reduce resonance issues THICH walls of MDF and bracing to reduce any panel lengths over 8". The cabinet is MADE for bass, not every frequency on the planet...

Pods, Springs, Air ride or a good sand pit the SUB cabinets. (I'm using OB servos by GR)
Pods, Springs and or air ride the Mid Bass Cabinets. My MB LS Columns
Pods, Springs and or air ride the Monitor cabinets. VMPS Elixirs..

Dear Mr. Richard Vandersteen, Spikes?

With great respect and regard

Well a great speaker may not have such noble beginnings as some of the above. Here we go. Three guys setting around talking one night.
One a speaker manufacture
One an Amp designer
One a master cabinet maker

The amp designer, who doesn't care for speaker design at all, sketches a speaker design on a napkin that he know will work VERY well, BUT has never seen anyone tackle the wide baffle issues with any success.
That was  James Bongiorno. He hands the sketch to Brian Cheney of VMPS. It's a new design for neo 8 planars (Monsoon), Strathearns, BG ribbons, any and every type of narrow planar or ribbon design. Dorn Dibble who is there sharing the single malt is asked if he could do it he says yes I need some tools..

The Elixir was born, HDF front baffle coupled to a MDF bass chamber, and only 16 pairs ever produced, It's an amazing story of 3 drunk fellow designing a speaker one night on a drink napkin.
Pimp Daddy, Mr. Bass and "The Dibbs". 

BTW all were pretty decent jazz musicians at the time before their passing..

I liked him.... Didn't talk much. I watched everything he did.. Man he was fast..

Regards

Sure a lot of CRAP talkin from you Mr tsushima1.  Do you have an issue with the product or MC? Jab Jab Jab..

As for a US rep.. Why stop there..

Jealousy always brings unkind words. If you don't like a product, then say so. If you don't like a person PM them in private.

Praise in public, chew in private..  It makes a better AG for everyone.

I'd appreciate that.. Y'all!!

Regards