Bi-amp myth true false rti a9

Pinktulip7
Pinktulip7 Posts: 249
edited April 2009 in 2 Channel Audio
Finally I have done Bi-Amping RTi A9 with Carver M1.5T 350 WPC (Powering Low Pass) and Carver M 4.0T 375 WPC (Powering High Pass)...now after experimenting for couple of hours I realized that very little or no sound improvement over my previous setup which was RTi A9 Bi-Wired Powered by Carver M1.5T :(:(:(
TV :>Panasonic TC-P55VT50
RECEIVER :> HARMAN KARDON AVR 7300
FRONT :> L & R :> POLK RTI A9 500 W
AMP :1> PARASOUND HALO A21 250 W
AMP :2> EMOTIVA UPA-1 200 W
CENTER :> POLK LSiM 706c 250 W
SURROUND SIDE :> POLK RTi A3 150 W
SURROUND REAR :>POLK FXI A6 150 W
DVD PLAYER(HD) :>TOSHIBA HD X-A2
DVD PLAYER(BLU-RAY) :>Panasonic DMP-UB900
POWER CONDITIONER :> PANAMAX M5400-EX
SUBWOOFER :A> SVS SB16-Ultra 1500 W Front
SUBWOOFER :B> SVS SB16-Ultra 1500 W Rear
Post edited by Pinktulip7 on
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Comments

  • ben62670
    ben62670 Posts: 15,969
    edited April 2009
    That is fairly common. Similar designed amps on highs and lows with the same type of speaker cables, and IC's yield less than impressive results.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • seafire
    seafire Posts: 459
    edited April 2009
    Interesting.I have bi wired and amped for many years.Bi amping makes the bigger audio difference.But is it for the better? Hearing more controlled bass and cleaner highs at the expense of musicality?Hmmm my jury is still out on that one.Something in the line of CD vs. analogue.From a technical perspective it has it's merits but I'm still not convinced ;)
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  • ben62670
    ben62670 Posts: 15,969
    edited April 2009
    SeaFart should be taken with a grain of salt. Anytime Sea nothing reads a post by members with more than... Posts he goes against the grain.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • Systems
    Systems Posts: 14,873
    edited April 2009
    Passive bi-amping(using integral passive xover) will gain you a few extra DB of headroom that may be advantagous if both amps are lower power units.

    IMO the real sonic gains come with active biamping were the passive xover is bypassed completely , instead an active line level xover is used.
    Testing
    Testing
    Testing
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  • madmax
    madmax Posts: 12,434
    edited April 2009
    The only way to KNOW is to try the combination you are considering. Did you try biamping both ways? Bass-bass and treble-treble vs bass-treble and bass-treble? The two ways are called horizontal and vertical bi-amping respectively.
    madmax
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D
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  • Systems
    Systems Posts: 14,873
    edited April 2009
    Something to be aware of when passive biamping is the input sensitivity( or gain) of the amps.It should be the same on both amps or you will alter the balance between the woofer and tweeter.
    Testing
    Testing
    Testing
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  • cnh
    cnh Posts: 13,284
    edited April 2009
    GV#27 wrote: »
    Something to be aware of when passive biamping is the input sensitivity( or gain) of the amps.It should be the same on both amps or you will alter the balance between the woofer and tweeter.

    +1 on that, and also to Ben's post above...it is recommended by many that you experiment with different kinds of cable and even different gauges of those cables in bi-amping. I've haven't done this enough to suggest what to use. The guys above probably know a lot more....

    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]
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  • I-SIG
    I-SIG Posts: 2,243
    edited April 2009
    I had very good results bi-amping my SRS's before I bought my Cary. I noticed an immediate improvement in space and clarity of the highs with slightly cleaner bass. The Parasound combo of a HCA-2200 and 1000 was insanely dynamic. I bet a Halo A21 and 23 would deliver very similar results with way better highs. That's where my Cary really shines. Smooth but detailed on the top-end but still enough juice to rock. I want to pick up another CAD-200 or a Cinema 5 one day.


    Wes
    Link: http://polkarmy.com/forums

    Sony 75" Bravia 4K | Polk Audio SDA-SRS's (w/RDO's & Vampire Posts) + SVS PC+ 25-31 | AudioQuest Granite (mids) + BWA Silver (highs) | Cary Audio CAD-200 | Signal Cable Silver Resolution XLR's | Rotel Michi P5 | Signal Cable Silver Resolution XLR's | Cambridge Audio azur 840C--Wadia 170i + iPod jammed w/ lossless audio--Oppo 970 | Pure|AV PF31d
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  • Rocco1
    Rocco1 Posts: 190
    edited April 2009
    madmax wrote: »
    The only way to KNOW is to try the combination you are considering. Did you try biamping both ways? Bass-bass and treble-treble vs bass-treble and bass-treble? The two ways are called horizontal and vertical bi-amping respectively.
    madmax

    Mad max wouldnt you think that you would have to have 2 of the same amps to hear if this works correctly.

    I am very intrigued to find out what happens with OP trials. I am looking to experiment with my 9s and was hoping bi-amping is the answer.
    Man Cave: 7.1
    -PS Audio Power Plant Premier
    -PS Audio Power backup
    -Onkyo Pre/Pro> 2 Adcom555se bridged and bi-wired> RTi A9s
    > Adcom GFA 7605> CSi A6 center, RTi A3s side rears, FXi A6s rears
    >Sub = MK Audio 10'
    -PS3
    -Onkyo 5 disc cd player
    -Directv
    -Samsung 59' plasma flanked by 2 Samsung 43' plasma's
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  • nooshinjohn
    nooshinjohn Posts: 25,418
    edited April 2009
    seafire wrote: »
    Hearing more controlled bass and cleaner highs at the expense of musicality?

    Sounds to me that you once again have your head stuck someplace rather stinky... More controlled bass response and cleaner highs IS musicality and is a benefit gained, not lost as you presume. Go back to playing that kazoo and recorder you and your imaginary friend call an orchestra and leave the audio discussions to those that appreciate true sound...
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
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  • Pinktulip7
    Pinktulip7 Posts: 249
    edited April 2009
    No I haven't try with same Amp but will give it a try and thx for all response....
    TV :>Panasonic TC-P55VT50
    RECEIVER :> HARMAN KARDON AVR 7300
    FRONT :> L & R :> POLK RTI A9 500 W
    AMP :1> PARASOUND HALO A21 250 W
    AMP :2> EMOTIVA UPA-1 200 W
    CENTER :> POLK LSiM 706c 250 W
    SURROUND SIDE :> POLK RTi A3 150 W
    SURROUND REAR :>POLK FXI A6 150 W
    DVD PLAYER(HD) :>TOSHIBA HD X-A2
    DVD PLAYER(BLU-RAY) :>Panasonic DMP-UB900
    POWER CONDITIONER :> PANAMAX M5400-EX
    SUBWOOFER :A> SVS SB16-Ultra 1500 W Front
    SUBWOOFER :B> SVS SB16-Ultra 1500 W Rear
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  • Rocco1
    Rocco1 Posts: 190
    edited April 2009
    Pink
    if your amps are able to be bridged you may try that as well. Then by-wire the speakers.
    In my research i found the adcom 555se bridged is 600watts/chann, then i would bi wire them. One amp for each speaker of course. That would rock I think. I hope to try and test it out soon.
    Man Cave: 7.1
    -PS Audio Power Plant Premier
    -PS Audio Power backup
    -Onkyo Pre/Pro> 2 Adcom555se bridged and bi-wired> RTi A9s
    > Adcom GFA 7605> CSi A6 center, RTi A3s side rears, FXi A6s rears
    >Sub = MK Audio 10'
    -PS3
    -Onkyo 5 disc cd player
    -Directv
    -Samsung 59' plasma flanked by 2 Samsung 43' plasma's
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  • DarqueKnight
    DarqueKnight Posts: 6,765
    edited April 2009
    Pinktulip7 wrote: »
    ...now after experimenting for couple of hours I realized that very little or no sound improvement over my previous setup which was RTi A9 Bi-Wired Powered by Carver M1.5T :(:(:(

    Don't dismiss bi-amping as a myth.Your results with bi-amping will vary depending on the amps, speakers and associated gear. You are doing the right thing by experimenting.

    I tried it a few years ago and had mixed results. You can read about it here: SDA SRS 1.2TL Bi-Amp Adventure.
    Proud and loyal citizen of the Digital Domain and Solid State Country!
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