Bass sensation like a loud car system in home?


I know this is a bit of a silly question but bear with me here:

What options are there for getting that feeling of a powerful subwoofer vibrating through your body in your home?  I know the easiest option would be to just put a capable subwoofer next to your seating and let it hit as hard as it can.  I'm also not trying to make all of my neighbors hate me so I'm looking for some creative solutions to pulling it off at reasonable residential volumes.

I'm thinking that some combination of tactile transducers in the couch and a subwoofer next to or also installed inside of the couch would get pretty close.  Being right under your body I wonder what kind of decibels would actually be required to get a bass massage going.  Without the sensation of the high volume bass it also might just seem silly and be a complete waste of time aside from watching movies.

Thoughts?
yukispier

Showing 6 responses by mijostyn

Yukispier, not a problem and you do not need to put vibrators under your seat either. Assuming a 16 X 30 foot room you will need 4 12" or larger subwoofers, 4 amplifier channels 1000 watts each and digital bass management. If you have the money and are serious about doing this I'd be happy to help.
1+jd55, I have heard some outrageously good car systems, competitions for highest sound pressure levels aside. I use to do my own systems because the factory ones were terrible but that is no longer the case. Although most stock systems are not the last word in performance they are quite tolerable so, I do not feel the need to rip a new car apart. Car systems to me are like headphones. They can sound great but it is the wrong perspective. 
Go william53b and absolutely right. Dave Holland uses a cabinet with 4 10" drivers and close in it is pretty potent. This is for your routine jazz
clubs which are not all that large. 
You do not need to resort to huge drivers to get the best bass. They take up way too much room when you factor in the enclosures they require.
Today's subwoofers are way more powerful than drivers of old. Their Xmax is much higher, up to 2 inches is not uncommon. The old drivers you were lucky to get 1/4 inch out of them. The larger drivers also tend not to move straight in and out. They wobble! I have seen it with high speed photography. In a 16 X 30 foot room four 12" drivers in corners and along the front wall (were they are most efficient) will do fine given enough power and a little EQ. Eight 12" drivers would be definite overkill.

The one concept I really dislike is the one that requires different bass for different functions like theater vs 2 channel. My 2 channel system doubles for theater and I do not make any adjustments between these functions. Last week I almost scared the projector tech to death with Star Wars then next I put on Dave Holland. No adjustments. Accurate bass is accurate bass regardless of what you are listening to. Maybe people like juicing the low end for theater because they think it's cool like oversaturating the colors. Definitely, there are way more theater people than us audiophiles and you always want to buy equipment that was designed especially for your purpose which is marketing garbage. A good is a good amp regardless. Accuracy is exactly the same for theater and 2 channel. Maybe some of us audiophiles are thinking we don't have to go down that low. You don't have to do anything but in regards to the performance it is a vital part of projecting realism and making you think you are really in a much larger room. Many systems start dying at 100 Hz. The specs might say 28 Hz to 20 kHz but that is at one meter in an anechoic chamber not three meters in a 15 X 25 foot room. Just get a measurement microphone. Actually, don't do that. It can be very depressing. Sh-t! I was listening to that??
@phusis , I would feel free in saying the vast majority of us do not have the room for subwoofer horns. In my case it would not work anyway. I have to form a line source with them which means 4 or more drivers in most situations. If you put the subs in corners and in a wall floor intersection you do increase their efficiency requiring about 1/4th the power to get the same volume. In this case as a line source 4 12" drivers can do a lot of damage in your typical room. My own system will shortly have 8 12" drivers in 4 sealed cylindrical balanced force enclosures.
@phusis , You could do two floor to ceiling towers in the corners with four 12 subs in each tower and get decent results and here is why I do not do it that way. It is virtually impossible to control resonances and vibration in an enclosure that big. The problem with most subwoofers is they are not just speakers. They are musical instruments. Enclosure design is not so simple. Any vibration or shaking of the enclosure is distortion. Keeping the enclosure from becoming a musical instrument requires a very heavy stiff walled enclosure. The Stiffest enclosure would be a sphere. Spheres are unfortunately hard to make and work with. Next in line is a cylinder. Put a driver in each end of the cylinder and you cancel forces that want to shake the enclosure. A heavy cylinder with 1.5" walls will not resonate. No resonating and no shaking. Perfect. Place four of these units along the front and in the corners and you have an extremely low distortion horizontal line source. If you recall. line sources do not radiate sound off the ends, in my case the sides! The subwoofer line source system has only one early reflection, the ceiling. My listening room is open to the kitchen and then the dining room. The nearest full wall is 75 feet away. I still have some nodal behavior in the room but it is greatly diminished. It sounds like you are in a much larger room. 

Getting a horn to do 18 Hz requires an extremely big horn. I know of one fellow who casted bass horns in his house's foundation. The drivers were in the basement. The horns curved outwards and upwards opening up at the bottom of the front wall making a "U" turn. I only saw pictures. This was before DSP. Those drivers had to 15 feet behind the rest on the system. That is a huge delay. I have screwed around with delays just to see what I could detect audibly. 1.5 ms is clearly audible in the midrange.
If your subs crossed over like mine at 120 Hz 1.5ms would also be clearly audible. Much lower and you would be able it pick it out in an A/B comparison. It gets more difficult as you go lower. It becomes not what you hear but what you feel.