Bi-ampable CRS+

zingo
zingo Posts: 11,258
edited May 2008 in Vintage Speakers
Has anyone ever modded their CRS+ (4.1TL) to be bi-ampable? I was looking at the x-over trying to figure out how it would work. This is what I came up with but I could be way off...
Jake
Post edited by zingo on
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  • Face
    Face Posts: 14,340
    edited May 2008
    HF looks fine, but reversed. LF doesn't appear totally right to me, besides being reversed also. :)

    I did this quick with paint. I would wait on Jesse or someone else who knows more to chime in though.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • F1nut
    F1nut Posts: 50,734
    edited May 2008
    For a speaker that size, why bother?
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    It's as neat of an idea as making it a 4.1TL in my book. Why not?
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • zingo
    zingo Posts: 11,258
    edited May 2008
    I'm running an Outlaw 7100 because of my integrated 2 Ch and HT. I figured since I have two extra channels on the amp and not a lot of extra money right now, I could double the power going to the speakers since they are only recieving about 110wpc.

    The other point is that I also have a Carver Pm1201 that I could use to power them with about 400wpc, but the SQ is better on the Outlaw, so I figured higher SQ is better than higher power. What do you think?

    Plus, they have already been recapped, 4.1TLed, and RDOed, this is the next step, right... :D
    Jake
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  • DarqueKnight
    DarqueKnight Posts: 6,765
    edited May 2008
    You may need to do some crossover modifications to adjust the impedances once the HF and LF sections are split.

    I recall reading about someone who split the crossover of his 1C's, but I don't remember where I read it.

    I have also read posts on splitting the crossovers of other speaker brands on some DIY forums, but I do not recall the specifics of those either.
    Proud and loyal citizen of the Digital Domain and Solid State Country!
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  • NotaSuv
    NotaSuv Posts: 3,860
    edited May 2008
    F1nut wrote: »
    For a speaker that size, why bother?


    why not bother? always fun to try new things
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  • F1nut
    F1nut Posts: 50,734
    edited May 2008
    NotaSuv wrote: »
    why not bother? always fun to try new things

    As good as the 4.1TL upgrade makes the CRS+'s any further tweaking benefit is going to be limited by the cabinet size, the number of drivers and Raife's point. But, that's just my $.02, so knock yourselves out.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • zingo
    zingo Posts: 11,258
    edited May 2008
    Per DKs prodding, I was searching old posts and someone mentioned a PDF for a bi-amp upgrade but there was no link. So I PMed Ken to see if it's floating around head quarters and I'll let you know what I find out.
    Jake
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  • amulford
    amulford Posts: 5,020
    edited May 2008
    I would be careful, as Raife said, your going to have to adjust the impedances or your going to put the tweeter thru the wall.
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  • F1nut
    F1nut Posts: 50,734
    edited May 2008
    Reported, now get lost!
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • amulford
    amulford Posts: 5,020
    edited May 2008
    Did you check those links out??? WTF???
    I top you and I are also top-Jin top

    Small world...
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  • F1nut
    F1nut Posts: 50,734
    edited May 2008
    amulford wrote: »
    Did you check those links out??? WTF???



    Small world...


    I never click on spam links.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • ben62670
    ben62670 Posts: 15,969
    edited May 2008
    zingo wrote: »
    Has anyone ever modded their CRS+ (4.1TL) to be bi-ampable? I was looking at the x-over trying to figure out how it would work. This is what I came up with but I could be way off...

    You are right. The inductor has to be between the ground, and the rest of the circuit. I would not bother though. Too much work for really no gain. You would have to play with the levels of the amps, or put a resistor in the signal path of the tweeter.
    Don't both dude really. Remember this is coming from a guy who has to tear into nearly everything he gets.
    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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