I guess nobody else has been reading my posts but me.
From the start I said, Use tactiles correctly with Risers and the effect is far more realistic and emphatic than ANY chair application can ever possibly hope to be, Why? There is simply not enough Mass and Surface area for effective resonating.
That everybody still thinks their results are "Killer" is both good (for them) and a product of not knowing anything else but that application.
Also, most everybody is stuck on using 3, or 5, and doing so in an inefficient manner, This is due to "Gee, I can buy Auras so cheap, and I'm doing everything on "the cheap", so I'm not buying anymore than I have to." kinda thinking. I'm not "Dissin' " here, I've read that exact (or damn close) statement at least 10 times in this thread alone!
Buds, you get what you pay for.
No 15 year old Pawn Shop amp is going to thump your hind end and feet like a Amp that can drive a 2 Ohm load and deliver 350 wpc doing so.
(Ok, maybe it will if your driving 1 or 2 Auras with 120 wpc. Big job, eh? Pushing 2 little 25 watt magnets.
No chair with 1 Tactile attached will receive and resonate a 60 Hz signal with as much effect and emphasis as 4 Tactiles located in a Riser constructed properly.
Clarence, you've built a "Boom Box" of a Riser, and because of that, those standard Auras can easily drive the Risers mass into resonant heaven. But even with your sterling results, your gonna find just how limited that range of acceptable sound is as soon as you push that array with a good DTS sound track, and goose the volume.
The Riser need more stiffening, at least 16 o.c. with those 2" x 6"s
(BTW, I really admire your end results, Clarence. But tell me, what screen are you using? Even CMRA cannot say at present.
For goodness sakes People. MORE IS BETTER as far as the use of Tactiles.
The object should be, and is to saturate the ENTIRE mass of an object with an even and well balanced amount of energy, dispersed throughout.
A Tactile driven too hard in one spot localizes the effect (Cannon Enemas?) and can all to easily cause the object (Chair, Couch, or Riser) to experience "Howling", a phenomena common to Speaker cabinets where the resonant "Q" factor of the driver is improperly matched with the Speaker Cabinet's design and/or volume. Once a saturation point is reached, a "Bass Peak" is quickly reached at a certain frequency and that particular frequency become painfully more apparent that anything else.
Only a object whose own Mass can help it resist being overpowered, or a lessor level of energy dispersed more evenly throughout a object with less "Mass" can deliver truly accurate "sub bass" tactile effects.
Man, when Bombs go off, do you want to feel the concussion, or just a 'rumble or shake'?
When one of my Tactile arrays go off, everything goes off. Eyes roll back. Jaws drop. Feet lift up spontaneously. Sometimes, people jump up out of their chairs, and not because the chair itself gave them a prod.
(Master & Commander -Under Attack- Heard with 2 -10" in-wall subs and 8 Aura Pros in a solid Sub Floor can make a Linebacker cringe and wet himself!)
I've experienced Auras, Clarks, RBHs, ButtKickers, and other Tactiles in Chair / Couch applications of many different types, and only furniture designs that allow for the aggressive stiffening and Plywood under-sheathing of a large area work anywhere even remotely as well as a Riser can when done 'rightly'.
I cannot easily place the last time I ever used just 4 Tactiles in a application. I can however tell you how many times I've use an odd number tactiles per channel. Never. Nor have I EVER series-ed a load up over 8 ohms merely to appease the needs of an anemic amp or receiver. If I need to balance my impedance, I'll add another unit, parallel 2 per pair, then series the two pair back up to the original impedance.
I've done at least one system with 18 Tactiles where 3 were paralleled down to 1.33 ohms, then three sets of 3 Tactiles series-ed together up to 3.9 Ohms, then driven with an amp capable of driving such a load. Four complete identical arrays. 2 Stereo Amplifiers. 1400 watts total.
Chairs are certainly "OK" when nothing else can do (if done 'rightly') but don't ever go near one of my 8 Tactile (...or more!) Riser/Floor applications if you don't want to experience how the "other half lives".
Sour Grapes are bitter indeed.
And for a prime example of "I didn't know that...", it seems than a lot of people are clueless as to what really makes a tactile work. All to often, the tactiles are tightened down so much, the Piston inside cannot "jump back' along it's travel with any real response time. This creates both a gross inefficency as well as a retardation of the tactile's energy transfer at the resonating bass of the unit.