Can I (or should I) use FXi3's for 7.1 rear surround?

THXtom
THXtom Posts: 1
I'm putting together a little bedroom theater for myself and already have a pair of FXi5's for rear surround - I love their bi/dipole sound.

If I want a 7.1 setup....should I add another set of FXi bi/dipoles speakers or will that ruin the sound?

In other words, will two pairs of bi/dipoles sound like conflicting crap in a 20ftx20ft bedroom???

All advice appreciated!
Thanks!
Post edited by THXtom on

Comments

  • Eric W
    Eric W Posts: 556
    edited May 2008
    In most systems, for 7.1 we recommend using the same model speakers as your L and R surround speakers- so if you already have FXi5's, then use another pair of FXi5's- mounted at the same height.

    Regardless they should be properly positioned- two at the sides of the listening area and two behind, forming the correct angles.

    Here's a good diagram:
    http://www.dolby.com/consumer/home_entertainment/roomlayout2.html
    -Eric
    -Polk Audio
  • daboyz
    daboyz Posts: 5,207
    edited May 2008
    Just for giggles, what's the rest of your "bedroom" rig?
  • zingo
    zingo Posts: 11,258
    edited May 2008
    daboyz wrote: »
    Just for giggles, what's the rest of your "bedroom" rig?

    Agreed.



    And thanks for the little Dolby diagram; it's pretty cool how they set that up.



    If those are the speakers you have THXtom, use them. They'll sound good.
  • jjeckelxz5
    jjeckelxz5 Posts: 48
    edited May 2008
    i'm still learning about all this surround stuff but if you used bi/dipole speakers in the rear wouldnt that send the sound everywhere but toward you or some sound to you and some straight into a wall?
    reciever-Yamaha rxv1700
    front-RM50t
    center-RM30
    surrounds-M40
    rear surrounds-RM30
    velodyne minivee
    playstation 3
  • Eric W
    Eric W Posts: 556
    edited May 2008
    jjeckelxz5 wrote: »
    i'm still learning about all this surround stuff but if you used bi/dipole speakers in the rear wouldnt that send the sound everywhere but toward you or some sound to you and some straight into a wall?
    Yes, that's the point of the surround speakers. They should be diffuse (hard to tell where they're coming from) enveloping, so it's fine to have the sound bounce off of all the surrounding surfaces. If you aim the speakers directly at you the sound becomes quite pinpointable.

    The front speakers- however should be aimed directly at the listener. Here you want a focused, defined sound. A little different then the diffuse nature of surrounds.

    Of course everything in audio is personal preference, some listeners prefer the more direct/pin point sound of a surround speaker aimed directly at the listening area.
    -Eric
    -Polk Audio
  • xandra
    xandra Posts: 291
    edited May 2008
    Curious how good Bi-Pole /Di-Pole models are for music...
    LR Setup:
    Polk RTi10's, RTi6's, CSiA6 (5 ch setup)
    Onkyo 705 & Denon 3808ci Receiver, Onk 875
    Parasound 2250 Amp
    Sony 26" KDL series Bravia LCD
    Panny DMR-EH75 Recorder
    Panny DVD-F87 (5 disk DVD player)
    NAD T585 (DVD/SACD)
    Yamaha DVD-C961 (5 disk SACD/DVD)
    SciAnt Explorer 8500HD Cable Box
    Orig & 5Gen iPods, , Wii

    Plans/Fantasies:
    • 400 disk player that handles ALL formats, sounds as good as NAD with Panasonic interface & compatability.
  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited May 2008
    you could absolutely use FXi3 with FXi5, some folks also use a non-surround back speaker, for DVD's that have discreet rear tracks many of these sounds -gunshots, as an example are much more directional, the speakers should be mounted above your head and closer together than you might think.

    RT1
  • engtaz
    engtaz Posts: 7,669
    edited May 2008
    +1 reeltrouble1. My friend uses them them for side and rear speakers.

    engtaz
    engtaz

    I love how music can brighten up a bad day.
  • _Noah_
    _Noah_ Posts: 15
    edited May 2008
    I use FXi A4s for my sides and rears and it works fine.
  • wallstreet
    wallstreet Posts: 1,405
    edited May 2008
    If you're running a THX amplifier, then direct radiating rears is the way to go. This diagram is how my HT is setup. I've got fx1000's on the sides and inwalls placed together on the back wall. http://www.thx.com/home/setup/speakers/71.html