bi-wiring. confused??

Discussion in 'Archived Threads 2001-2004' started by Mikey.S, Nov 13, 2002.

  1. Mikey.S

    Mikey.S Extra

    Joined:
    Oct 26, 2002
    Messages:
    18
    Likes Received:
    0
    ok ive ordered my ht setup

    yamaha rx-630rds
    toshiba sd220 dvd
    mission m72 cinema speakers (5 speakers)
    missoin 70as sub

    im still a bit confused by the bi-wiring of the 2 main front speakers.

    ok the m72 main speakers have 2 sets of binding posts and are rated at 8ohms along with the receiver output rated 8ohms. how do i wire up the outputs of the reciever to the speakers??

    if i wire to both sets of posts will it change the impedance??

    i dont want to cause problems running everything off its spec.

    cheers mike :b
     
  2. Edward J M

    Edward J M Cinematographer

    Joined:
    Sep 22, 2002
    Messages:
    2,031
    Likes Received:
    0
    Remove the binding strap(s) between the posts. Use either dedicated bi-wire or two lengths of regular wire with banana plugs. Just stay consistent with polarity. The two red + at the speaker get combined into one at the receiver end and connected to the red + at the receiver. Same deal for the black - side.

    Ed
     
  3. Mikey.S

    Mikey.S Extra

    Joined:
    Oct 26, 2002
    Messages:
    18
    Likes Received:
    0
    if i leave the binding post on the speaker and just use one wire rather than bi-wiring will these make the speakers run at 8ohms??
     
  4. Chu Gai

    Chu Gai Lead Actor

    Joined:
    Jun 29, 2001
    Messages:
    7,270
    Likes Received:
    1
    no effect whatsoever. for another discussion regarding biwiring see this link
    out of curiousity, just what are you trying to accomplish?
     
  5. Edward J M

    Edward J M Cinematographer

    Joined:
    Sep 22, 2002
    Messages:
    2,031
    Likes Received:
    0
    Chu Gai is correct 100% - bi-wiring does not change the impedance load that the amp sees. If you don't remove the binding strap when you bi-wire, though, bad things will happen!

    The only benefit of bi-wiring is to bypass part of the internal crossover/filter network in the speaker and send a slightly less processed or theoretically "purer" signal to the high/mid and low speakers. Some enthusiasts report a slightly more open, detailed, and airy sound, but it will not be a "night and day" difference - subtle is the operative term here.

    Ed
     
  6. RichardH

    RichardH Supporting Actor

    Joined:
    Nov 28, 2000
    Messages:
    742
    Likes Received:
    0
    Huh? I don't think that's quite right. When you bi-wire, you're just moving the connection from the jumper back to the receiver's binding posts. You don't get to bypass anything in the crossover.

    When you have the jumpers on, each set of binding posts is receiving a full-range signal. So, it has to be able to filter out the lows for the tweeter and filter out the highs for the woofer. This doesn't change just because you remove the jumper. Each separate set of binding posts is still getting a full-range signal.

    There are a lot of skeptics when it comes to bi-wiring, and passive bi-amping for that matter. You might not hear any difference at all from bi-wiring. Some people have reported getting the same benefit by simply replacing the jumper w/ a section of speaker wire.
     
  7. Mikey.S

    Mikey.S Extra

    Joined:
    Oct 26, 2002
    Messages:
    18
    Likes Received:
    0
    cheers for the replys people. gettin a better idea.
    so basically as i see it if i use one set of wires and leave the binding post on ill be gettin 8 ohms and if i use 2 wires from the amp and take the post off ill be getting 8 ohms??. my aim is not to end up running the speakers at anything other than 8 ohms. sorry if i sound a bit daft but just want to make sure i dont end up blowing anything in my new toy.
    [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG]
    cheers mikey
     
  8. Edward J M

    Edward J M Cinematographer

    Joined:
    Sep 22, 2002
    Messages:
    2,031
    Likes Received:
    0
    Hi Richard:
    "The idea with biwiring is to connect the amplifier to the filter halves separately to prevent intermodulation, generated by one driver, to influence the other driver."
    The author of this article said it better than I did above; I'm sorry if I confused anyone with my less than accurate description of what bi-wiring supposedly accomplishes.
    The website URL is noted below so you can read the whole thing. It was pretty interesting to note both the pros and cons of bi-wiring.
    Regards,
    Ed
    http://www.sonicdesign.se/biwire.html
     
  9. Rob Rodier

    Rob Rodier Supporting Actor

    Joined:
    Jul 11, 2002
    Messages:
    538
    Likes Received:
    0
     
  10. RichardH

    RichardH Supporting Actor

    Joined:
    Nov 28, 2000
    Messages:
    742
    Likes Received:
    0
    Edward:
    cool.

    Rob:
    I think so.

    the woofer coming back to "rest" will create a 'back current' in the signal connected behind it. Which in the case of bi-wiring means that it's only in the 1 wire. But! that wire is connected to the tweeter's wire back at the amp. So, I don't see how it would affect it.

    Sure, if you measure what's in each wire while playing, it's different, but is the sound coming out of the speaker *actually* different?? (compared to just having a piece of speaker wire as the jumper.

    I've heard of some cases where the jumper was such a bad conductor that it was causing harm.
     
  11. Dave Nibeck

    Dave Nibeck Stunt Coordinator

    Joined:
    Feb 23, 2000
    Messages:
    152
    Likes Received:
    0
     
  12. John Royster

    John Royster Screenwriter

    Joined:
    Oct 14, 2001
    Messages:
    1,088
    Likes Received:
    0
    I'm curious as to what bad things will happen as well. I've used bi-wired before with the straps in place.
     
  13. Rob Rodier

    Rob Rodier Supporting Actor

    Joined:
    Jul 11, 2002
    Messages:
    538
    Likes Received:
    0
    Biamping w/ the jumpers in place is where a "bad" problem would surface.

    -rob
     

Share This Page