Need help

audiocrzy25
audiocrzy25 Posts: 8
edited July 2007 in Electronics
I have looked and could not find answer. I just bought Onkyo tx-sr 805b. The manual talks about bi amping. is it a god idea or not.
Csi 5 center, rti 12 front, Fxi 5 rear, Rt55i back, psw 450, Onkyo tx sr 805b, Sony 400 dvd changer, Sony 50" Hdtv, 360 with HD dvd player, PS3
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  • Bill Ayotte
    Bill Ayotte Posts: 1,860
    edited June 2007
    ah......I am not sure what you would be bi-amping...That would also require another amp...I don't see harm in it, but I think a quality separate amp would still sound better all around...
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  • audiocrzy25
    audiocrzy25 Posts: 8
    edited June 2007
    sorry i was wanting to bi amp rti 12's
    Csi 5 center, rti 12 front, Fxi 5 rear, Rt55i back, psw 450, Onkyo tx sr 805b, Sony 400 dvd changer, Sony 50" Hdtv, 360 with HD dvd player, PS3
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  • Bill Ayotte
    Bill Ayotte Posts: 1,860
    edited June 2007
    Ok....So you are saying it is possible to bi-amp using the receiver, or at least the manual says so...Sorry, I am just trying to clarify a little...

    As far as the differences in SQ go if/when you do this I couldn't tell you....I find it interesting that a receiver owners manual has anything concerning bi-amping in it to be honest....
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  • VXR8
    VXR8 Posts: 291
    edited June 2007
    Bill Ayotte wrote: »
    Ok....So you are saying it is possible to bi-amp using the receiver, or at least the manual says so...Sorry, I am just trying to clarify a little...

    As far as the differences in SQ go if/when you do this I couldn't tell you....I find it interesting that a receiver owners manual has anything concerning bi-amping in it to be honest....

    Hi Bill,

    It appears the trend of today with the latest AVRs :rolleyes:. My Yamaha also does it - I have bi-amped my RTi10s. If you are only utilising 5.1 from a 7.1 receiver, the Yamaha allows you to "allocate" the surround back channels for bi-amping. Once you select this option, you obviously cannot have surround backs again unless you deselect the bi-amp feature. Looks like Onkyo and others are doing the same.
    Regards - Gaz from the land of Oz

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  • engtaz
    engtaz Posts: 7,664
    edited June 2007
    Some Denon allow it also.
    engtaz

    I love how music can brighten up a bad day.
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  • Bill Ayotte
    Bill Ayotte Posts: 1,860
    edited June 2007
    That's some goofy ****, and a quick way for someone to blow up their fancy new AVR if they don't have anyone around to guide them....I would try it both ways and see which one you prefer...
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  • audiocrzy25
    audiocrzy25 Posts: 8
    edited June 2007
    Bill Ayotte wrote: »
    Ok....So you are saying it is possible to bi-amp using the receiver, or at least the manual says so...Sorry, I am just trying to clarify a little...

    As far as the differences in SQ go if/when you do this I couldn't tell you....I find it interesting that a receiver owners manual has anything concerning bi-amping in it to be honest....

    Bill why do you find it interesting that bi-amping is talked about in the manual.
    Csi 5 center, rti 12 front, Fxi 5 rear, Rt55i back, psw 450, Onkyo tx sr 805b, Sony 400 dvd changer, Sony 50" Hdtv, 360 with HD dvd player, PS3
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  • MADGSF
    MADGSF Posts: 603
    edited June 2007
    Did this with my Elite and RTi-10s and didn't hear any difference. Not sure what you gain since all the power is coming from the same amp. Much happier with my B&K and no bi-amping.
    AVR: Elite VSX-21TXH
    Amplifier: B&K 7250 Series ii
    Misc: Velodyne SMS-1
    Mains: RTi-10
    Center: CSi-5
    Rear: Boston DSi460
    Sub: SVS PC-Ultra
    TV: Panasonic TC-P58V10
    DVD: Panasonic DMP-BD60K
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  • Bill Ayotte
    Bill Ayotte Posts: 1,860
    edited June 2007
    MADGSF wrote: »
    Did this with my Elite and RTi-10s and didn't hear any difference. Not sure what you gain since all the power is coming from the same amp. Much happier with my B&K and no bi-amping.

    This is why I am surprised....It is not really Bi-amping....I can't really put a word to it, my only guess would be "bridging" the channels......
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  • millerman 3732
    millerman 3732 Posts: 1,488
    edited June 2007
    I don't know if you could call it bridging either, instead of turning two channels into one to get more power you use two seperate channels of the receiver (one of the front channels and one of the surround backs) to double the power output to the speaker, one channel to the top post and one channel to the bottom post of the speaker (don't forget to remove the jumper between the post), so instead of say 85w x 1 going to a speaker you have 85w x 2 = 170w to a speaker. Atleast thats how I think it works correct me if I'm wrong.
    Casey
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  • mutelight
    mutelight Posts: 1,054
    edited June 2007
    I have the same option on my Pioneer and I noticed a slight improvement in the low end. (Possibly a placebo effect.) I did notice an improvement at high volumes though.
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  • Bill Ayotte
    Bill Ayotte Posts: 1,860
    edited June 2007
    millerman 3732 wrote: »
    I don't know if you could call it bridging either, instead of turning two channels into one to get more power you use two seperate channels of the receiver (one of the front channels and one of the surround backs) to double the power output to the speaker, one channel to the top post and one channel to the bottom post of the speaker (don't forget to remove the jumper between the post), so instead of say 85w x 1 going to a speaker you have 85w x 2 = 170w to a speaker. At least thats how I think it works correct me if I'm wrong.

    That's true, I didn't think that all the way through.....I still don't see it as bi-amping though, it is the same amp......
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  • millerman 3732
    millerman 3732 Posts: 1,488
    edited June 2007
    Well the way I see it, and this could be all wrong, what is the difference in having two 2x100 amps and and one 4 x 100 amp to biamp a speaker, you will have to split the output from the pre-amp either way(receivers that are bi amp capable do this for you) and you'll be getting the same power.
    Casey
    H/T: Epson 6500ub
    Sony UBP-X800
    Toshiba HD-XA2 (HD-DVD, CD)
    Onkyo 805 (pre-amp)
    Outlaw 7125
    Polk RTi 10 (bi-amped)
    Polk CSi5 (bi-amped)
    Polk RTi6
    SVS PB 12 plus/2
    Velodyne SMS-1

    TV Rig: Samsung 50'' 4k display
    Polk Signa-1 Surround bar
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  • jayman_1975
    jayman_1975 Posts: 672
    edited July 2007
    I did this on my old Denon 3805 and noticed some difference in the low end. It seemed to have a little more puch at higher volumes but it also gave me slight yet noticable speaker hum. I read about this issue with the 3805 and bi-amping so I expected it and therefore probably noticed it more. Anyhow, I later added a two channel rotel amp to power my fronts and was much happier with the results. I have recently sold both the Denon and the rotel and went to an Arcam avr300 and have it bi-amped using the unused rear channels. Before you call me a hypocrite, I spent just about twice on the arcam than I got from selling the denon and the rotel so the funds are a little low at the moment but without a doubt I will be adding a power amp to the fronts when I can afford it.
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