BassShakers $30/pr. @ Parts Express

Discussion in 'Home Theater Projects' started by TimForman, Mar 6, 2003.

  1. TimForman

    TimForman Supporting Actor

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    Just ordered 3 pair.
     
  2. Chris Tsutsui

    Chris Tsutsui Screenwriter

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    I've had one in my shopping cart for a week. Still havn't pushed the trigger because I like to plan things well in ahead. I don't know much about the shakers, maybe someone can help.

    Two questions:

    If I wire the shakers to a full range signal from a car receiver that's stable at 4ohm with 22w rms, would I need to put in like a 6mh inductor to act as a low pass filter for each channel? Or will I have to buy an FMOD line filter to be put between the signal and the amplifier.

    Or will it be fine if I send a full range signal to the shakers from my 2 extra channels of my receiver.

    As for my HT, if I added another Y splitter for the shakers to an already existing Y-adapter for my dual subs, would it affect the sound of my subs?
     
  3. TimForman

    TimForman Supporting Actor

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    You will need something to act as a low pass filter. Sending a full range signal to a bass shaker is like having a buzzer on your butt. Many people have split their sub outs 4 ways and had success.
     
  4. TimForman

    TimForman Supporting Actor

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    I've decided to try a 50 Hz FMOD in front of the amp going to my bass shakers. I'll let you know how it works out. Just ordered it so it'll be a couple of days.
     
  5. MattD

    MattD Stunt Coordinator

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    So how did it turn out?
     
  6. TimForman

    TimForman Supporting Actor

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    It's working great so far. I'm powering the six shakers with an old Realistic stereo receiver that was given to me. I've no idea what the power output is. It's got a heavy transformer and I run the volume at about 1/3. I wired the shakers to get a 12 ohm nominal impedence, 3 shakers per channel. The back of the receiver lists impedence for 8 or 16. I guess I cut it down the middle. It took a little tweaking to get all the adjustments right; balancing the two channels since I'm feeding two different sets of furniture, the volume on the receiver and the line level. It sure shocks you when your watching something like Road to Perdition, dialog, dialog, then somebody fires a gun. HOLY BEJEEZERS! You about come out of your skin. Yeah, I'm lovin' it. This picture is the installation on the La-Z-boy and this one is the install on the theater seats. I placed neoprene between the shaker and the wood so it wouldn't vibrate. Actually I used mouse pads.
     
  7. Chuck Bogie

    Chuck Bogie Second Unit

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    Er... You may wanna unscrew 'em, and try 'em without the mouse pads - just get the connection between the shaker and the seat/frame nice and tight.
     
  8. TimForman

    TimForman Supporting Actor

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    Possibly. I only used the pads on the theater seats. I'm also concerned that the effect is so direct with the theater seats as it's only a few inches from the shaker to the gluteous maximus. On the sofa it's attached to the frame so the effect is radiated through the entire sofa. With the theater seats it's all in the seat itself.
     
  9. Bill Fagal

    Bill Fagal Stunt Coordinator

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    Perhaps these are made to be mounted directly to structural members, but it occurs to me that your use of a pad amounts to a mechanical lowpass filter, which may not be an altogether bad thing, as long as the lf gets coupled sufficiently.

    Bill
     
  10. MattD

    MattD Stunt Coordinator

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    BTW, Parts Express now has the Aura Bass Shaker Pros for $25 each.

    Matt
     
  11. Gabriel_Lam

    Gabriel_Lam Screenwriter

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    If you're interested in these, you can support home theater forum by using this link:

    PartsExpress, Home Theater Forum Link

    To get the Bass Shakers, search for: 299-027
    To get the Black Bass Shaker Pro, search for: 299-028
    To get the Gray Bass Shaker Pro, search for: 299-029
     
  12. Justin Ward

    Justin Ward Supporting Actor

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    I think I may order a pair of these. I love feeling the bass from my Tempest but I find I have to turn it up too loud to get the tactile feedback. Would one pair be enough for one medium chair?
     
  13. Chuck Bogie

    Chuck Bogie Second Unit

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    Oh yeah - Mount 'em to the frame, and mount 'em SOLID, so that they can't shake loose. I've got two pair (each pair wired in series, for 8 ohms) on a 3-person sofa.
     
  14. Justin Ward

    Justin Ward Supporting Actor

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    Sounds good. I think I will be ordering a pair as a birthday present to myself(birthday is tomorrow). Would a minisystem be sufficient to power these?
     
  15. Joel X

    Joel X Stunt Coordinator

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    If you wire two up in series to get 8 ohms you should be just fine with the minisystem.

    BTW, has anyone taken the time to tune one of these with a Feedback Destroyer?
     
  16. David Preston

    David Preston Supporting Actor

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    Do you think there is a way to mount them to a sleeper sofa? If so I will be getting them.
     
  17. Justin Ward

    Justin Ward Supporting Actor

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    Would I be better off with a pair of bass shakers or a single aura pro? It is only for one chair.

    And splitting the signal into 4 cables won't hurt SQ? I will have two signals going to the sub stereo amp and two going to the minisystem to power the shakers.
     
  18. Chuck Bogie

    Chuck Bogie Second Unit

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    Shouldn't hurt it. I'm getting a BFD sometime in the next few weeks. It'll be used to tune a Tiny Mity and I'll try the other channel with the shakers... They've got a hump around 50hzish, and I'd like to knock that down a little...
     
  19. jeff lam

    jeff lam Screenwriter

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    I've tuned mine with my BFD. I just ran test tones and made sure the amount of shake from each freq is close to the same. No real way to measure it without a sizemagraph(sp?)
     
  20. Joel X

    Joel X Stunt Coordinator

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    The bass shakers should register on a Radio Shack db meter, I think.
     

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