Monitor 70 Bi-amp questions

maintrain
maintrain Posts: 15
I'm thinking of bi-amping my monitor 70's and have questions concering impedance . When bi-amping, does the impedance change? The manual says 8 ohms but is it still 8 ohms per connection? (high and low). I'm looking at various amplifiers and want to make sure I get one that will give suitable power.
Front: Monitor 70's
Surrounds: Monitor 40's
Surround Back: Monitor 30's
Custom TC-3000 Sub (under construction) http://www.caraudioclassifieds.org/forum/showthread.php?t=23114
Sub Amp Behringer EP-2500
Pioneer vsx-1018-ahk
Sharp Aquos 52"

Polkie for life!
Post edited by maintrain on

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  • maintrain
    maintrain Posts: 15
    edited November 2009
    anyone?
    Front: Monitor 70's
    Surrounds: Monitor 40's
    Surround Back: Monitor 30's
    Custom TC-3000 Sub (under construction) http://www.caraudioclassifieds.org/forum/showthread.php?t=23114
    Sub Amp Behringer EP-2500
    Pioneer vsx-1018-ahk
    Sharp Aquos 52"

    Polkie for life!
  • vc69
    vc69 Posts: 2,500
    edited November 2009
    Give Polk support a call for the definitive answer. I believe you will still see a nominal 8ohm load.
    -Kevin
    HT: Philips 52PFL7432D 52" LCD 1080p / Onkyo TX-SR 606 / Oppo BDP-83 SE / Comcast cable. (all HDMI)B&W 801 - Front, Polk CS350 LS - Center, Polk LS90 - Rear
    2 Channel:
    Oppo BDP-83 SE
    Squeezebox Touch
    Muscial Fidelity M1 DAC
    VTL 2.5
    McIntosh 2205 (refurbed)
    B&W 801's
    Transparent IC's
  • tonyb
    tonyb Posts: 33,020
    edited November 2009
    Personally,it's not worth bi-amping the 70's. Use the coin to upgrade your speaks or source gear.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
  • larrykwiat
    larrykwiat Posts: 44
    edited November 2009
    i am thinking of bi-amping my monitor 70's. all it costs is a little more speaker wire and some settings on my stg-hd800 sony receiver(since i dont have any rear speakers... the bi-amp runs on the rear ouputs on the receiver).
    why wouldnt it be a good idea.... thanks in advance
  • louhamilton
    louhamilton Posts: 209
    edited November 2009
    larrykwiat wrote: »
    i am thinking of bi-amping my monitor 70's. all it costs is a little more speaker wire and some settings on my stg-hd800 sony receiver(since i dont have any rear speakers... the bi-amp runs on the rear ouputs on the receiver).
    why wouldnt it be a good idea.... thanks in advance

    The amplifier in your receiver is not that great. If you are truly interested in bi-amping, you will want to invest in external amplifiers. External amplifiers will usually provide a cleaner sound. This means that you can turn the volume up louder without clipping. Additionally, you will usually get a better dynamic range from the speakers.

    I don't think I would waste the time, energy, and money on the bi-amping at this stage. Unless, of course, you already have the extra speaker wire and what to try it out. You may or may not hear a difference.
  • cnh
    cnh Posts: 13,284
    edited November 2009
    In most cases bi-amping from the same AVR doesn't really do anything, does not increase the power you get....you must have two different amps to really double your power. That said the amps should match....so you'd be better off just getting a BETTER more powerful AMP and forget about it.

    Give those M70s 200 or more clean watts of power/channel and watch them 'sing'!

    cnh
    Currently orbiting Bowie's Blackstar.!

    Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
    [sig. changed on a monthly basis as I rotate in and out of my stash]
  • louhamilton
    louhamilton Posts: 209
    edited November 2009
    cnh wrote: »
    In most cases bi-amping from the same AVR doesn't really do anything, does not increase the power you get....you must have two different amps to really double your power. That said the amps should match....so you'd be better off just getting a BETTER more powerful AMP and forget about it.

    Give those M70s 200 or more clean watts of power/channel and watch them 'sing'!

    cnh

    Slightly off-topic, but do you think a good 2-channel amp per speaker for bi-amping is not a good idea?

    I'm being serious, because I thought a good 2-channel amp would be better. But obviously, not as good as two monoblocks per speaker. ;)
  • cnh
    cnh Posts: 13,284
    edited November 2009
    I'd say try it and see what your ears tell you...I haven't noticed much of a difference in Bi-wiring from the same two channel amp.

    Now if you have let's say...two Adcom GFA-545 and you wire the tweeter/mid-woofer combo on each speaker with one of the amps and the bottom bass drivers of both speakers with the other amp for each side..yeah that may provide a hearable difference and more power than driving both speaker with only one Adcom GFA-545 amp.....the Adcom is merely used as an example here since I think it's only 120w/channel but by using two you'd be giving both ends 120watts...additively.

    cnh
    Currently orbiting Bowie's Blackstar.!

    Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
    [sig. changed on a monthly basis as I rotate in and out of my stash]