Originally Posted by Killer_Nads
Thank you for your response, the problem is that these are going to be impossible to get hold of in UK! I was initially after motion transducers, as i prefer my seat moving rather then a static vibrate! Im assuming that these Crowsons move the whole sofa and also make it shake like the Buttcrakers do? or does it not vibrate and only do motion?
"Motion transducers" vs. vibration??? If, by "motion transducers" you mean something like D-Box, then NO!.., none of the "tactile" transducers will provide that kind of "motion." Only D-Box will provide actual movement of the seat in an up/down, left/right, front/back, Disney-ride kind of motion. D-Box will physically move the seat(s) by 4 to 6 INCHES in multiple 3D horizontal/vertical planes. It's VERY expensive, costing several thousands of dollars per chair. It uses a specific D-Box "Motion Code" track available on some, but not all, BluRay discs. Nothing else besides D-Box can use that track, as it is proprietary.
(Having said that, IN MY EXPERIENCE, the "Disney-Ride" motion provided by D-Box is pretty cool... for about 2 minutes... after which it becomes incredibly annoying and distracting. But hey, that's just me...
Many D-Box enthusiast love the effects: For all D-Box enthusiasts !
In any event, if you're looking beyond, (below???) D-Box, at "tactile" transducers, there are multiple ways to provide tactile response. Some move the seats directly; some move the seats indirectly and some move a platform that sympathetically moves the seats. IMO and IME, the systems that move the seats directly provide the most useful and natural tactile response.
In that category, the Crowsons top the list. They sit underneath the seating framework, either under the "legs" or "feet" of the seating, or under the framework of the chair. They directly move the seating up and down based on the frequency of the bass signal. They don't move nearly as much as a D-Box transducer. They only lift and lower the seating by a few millimeters. But that movement is not implicitly noticeable as an up/down motion. It is so subtle that it is very "natural" and it blends with the bass response in a way that augments the bass without being overwhelming or overbearing or distracting.
The biggest benefit of the Crowson transducers vs. many of the other "tactile" transducers is their very low frequency, (VLF), response. Tactile response at 5 - 10 Hz "feels" very different than tactile response at 40 - 100 Hz. Many transducers can do 40+ Hz. The Crowsons are in a league of their own when it comes to >40 Hz VLF response. A tactile motion response at 10 Hz feels like a "wobble" or a "shudder" while a 40 Hz vibration feels kinda like sticking your finger in an electrical outlet.
The other major benefit of the Crowsons is their rapid decay. When an effect "ends", the Crowsons stop vibrating immediately. Other transducers systems will have some inherent inertia that will cause them to continue to vibrate, or cause the system they're attached to, to continue to vibrate, well after the effect has ended. The immediacy of the decay of the Crowsons further enhances their "believability" and the naturalness of their response.
The Crowsons are 8 Ohm transducers, so they're pretty easy to drive. They can be run in many combinations of serial/parallel to provide the optimal resistance for most any amp.
Bottom line, if your looking for actual "motion transducers", there's only one game in town... D-Box.
If D-Box is not your thing, the next best option is Crowson. IMO, in many ways, the Crowsons are not just the "next best" option, but the more preferable option.