New Krell(to me) amp & 1000VA drednaught???

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  • nspindel
    nspindel Posts: 5,343
    edited February 2013
    Jeff, when you're at Krell can you find out if they'd have a box and foam packaging that would fit my amp? It's a KAV-2250. My box was ruined in a flood a few years ago. If they have a box that would work, I'd take a ride up there to get it. I live in CT. Planning on moving next year, so I want the box if possible. Thanks man....
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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  • mantis
    mantis Posts: 17,194
    edited February 2013
    Toolfan66 wrote: »
    Really?? Come on Dan, you can't be for real...
    I thought with non common ground amps you just had to lift the ground in the SDA cable or get one of those non common ground cables from Polk. This Deadnought seems like a waste of effort to put a huge transformer in line.
    Maybe I'm not fully understanding this design.
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • Leftplumma
    Leftplumma Posts: 88
    edited February 2013
    nspindel wrote: »
    Jeff, when you're at Krell can you find out if they'd have a box and foam packaging that would fit my amp? It's a KAV-2250. My box was ruined in a flood a few years ago. If they have a box that would work, I'd take a ride up there to get it. I live in CT. Planning on moving next year, so I want the box if possible. Thanks man....

    Sure I'll check for you.
    By the way, I asked them for a box for the 600 when we were trying to ship it up here and they quoted me $400.00.
    Welcome to the world of high end audio!!!
    Polk SDA 1.2 TL
    Infinity SSW-210
    Integra DTR 7.1
    Pioneer SC-57 Elite
    Sony X777ES
    Sansui BA-5000
    Hafler XL 600's in mono w/ George Kay Audio Tube upgrades
    Hafler xl 600 stock
    Krell FPB 600
    Avel 1000VA Dreadnought
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  • mantis
    mantis Posts: 17,194
    edited February 2013
    F1nut wrote: »
    More bad advice.

    About the Krell....

    That means he has to use the AI-1/Dreadnought.
    Can't you just lift the ground in the SDA cable or use a non common ground cable from polk ? Can't one build one of these non common ground interface cables instead of using a transformer? How are you wiring in the dreadnought?
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • nspindel
    nspindel Posts: 5,343
    edited February 2013
    Leftplumma wrote: »
    Sure I'll check for you.
    By the way, I asked them for a box for the 600 when we were trying to ship it up here and they quoted me $400.00.
    Welcome to the world of high end audio!!!

    $400 for a box?!?!?!? :eek:
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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  • nspindel
    nspindel Posts: 5,343
    edited February 2013
    mantis wrote: »
    I thought with non common ground amps you just had to lift the ground in the SDA cable or get one of those non common ground cables from Polk. This Deadnought seems like a waste of effort to put a huge transformer in line.
    Maybe I'm not fully understanding this design.

    You do realize that this is a Matthew Polk recommendation, right?
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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  • Leftplumma
    Leftplumma Posts: 88
    edited February 2013
    nspindel wrote: »
    $400 for a box?!?!?!? :eek:

    Well I think it was more of a reusable crate that was shipping worthy....
    I'm sure it was wood and well packed with foam.
    Here is what we/he came up with.
    It took me an hour to unpack this thing!
    2013-02-21_15-44-21_711.jpg
    Polk SDA 1.2 TL
    Infinity SSW-210
    Integra DTR 7.1
    Pioneer SC-57 Elite
    Sony X777ES
    Sansui BA-5000
    Hafler XL 600's in mono w/ George Kay Audio Tube upgrades
    Hafler xl 600 stock
    Krell FPB 600
    Avel 1000VA Dreadnought
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  • mantis
    mantis Posts: 17,194
    edited February 2013
    nspindel wrote: »
    You do realize that this is a Matthew Polk recommendation, right?
    No I did not know that.
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • nspindel
    nspindel Posts: 5,343
    edited February 2013
    That's pretty impressive Jeff :biggrin:
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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  • Toolfan66
    Toolfan66 Posts: 17,254
    edited February 2013
    mantis wrote: »
    Can't you just lift the ground in the SDA cable or use a non common ground cable from polk ? Can't one build one of these non common ground interface cables instead of using a transformer? How are you wiring in the dreadnought?

    The dreadnought is a non common ground cable just like the original Polk AI-1 it's just an upgraded one that Matt Polk recommends...
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  • Leftplumma
    Leftplumma Posts: 88
    edited February 2013
    nspindel wrote: »
    That's pretty impressive Jeff :biggrin:

    As much as I'd like to take the credit, it was the original owner that came up with the design.
    The thing was rock solid and bound down with the yellow ratcheting strap that you see.
    He left the whole assembly right with the crate!
    Everything was shrink wrapped with layers of bubble wrap and cardboard.
    A mighty packing job for a mighty amp!
    Polk SDA 1.2 TL
    Infinity SSW-210
    Integra DTR 7.1
    Pioneer SC-57 Elite
    Sony X777ES
    Sansui BA-5000
    Hafler XL 600's in mono w/ George Kay Audio Tube upgrades
    Hafler xl 600 stock
    Krell FPB 600
    Avel 1000VA Dreadnought
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  • F1nut
    F1nut Posts: 50,569
    edited February 2013
    mantis wrote: »
    Can't you just lift the ground in the SDA cable or use a non common ground cable from polk ? Can't one build one of these non common ground interface cables instead of using a transformer? How are you wiring in the dreadnought?

    The stock AI-1 or the Dreadnought (Avel 800V or 1000V transformer) is part of the non common ground interface cable. The transformer (1:1) is used to isolate the ground in order that dual mono, mono block or non-common ground amps can be used with all pin/blade SDA's and some blade/blade models.
    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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  • nspindel
    nspindel Posts: 5,343
    edited February 2013
    F1nut wrote: »
    The stock AI-1 or the Dreadnought (Avel 800V or 1000V transformer) is part of the non common ground interface cable. The transformer (1:1) is used to isolate the ground in order that dual mono, mono block or non-common ground amps can be used with all pin/blade SDA's and some blade/blade models.

    Only thing I would add to that is that a lot of us have started using the Dreadnought even with common ground amps, and are finding the results to be quite beneficial compared to a straight connection between the two speakers, even when using high quality cable.
    Good music, a good source, and good power can make SDA's sing. Tubes make them dance.
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  • FTGV
    FTGV Posts: 3,649
    edited February 2013
    nspindel wrote: »
    Only thing I would add to that is that a lot of us have started using the Dreadnought even with common ground amps, and are finding the results to be quite beneficial compared to a straight connection between the two speakers, even when using high quality cable.
    Used with common ground amps I would think the reduction in DC resistance should improve the bass slam and definition?
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  • mantis
    mantis Posts: 17,194
    edited February 2013
    F1nut wrote: »
    The stock AI-1 or the Dreadnought (Avel 800V or 1000V transformer) is part of the non common ground interface cable. The transformer (1:1) is used to isolate the ground in order that dual mono, mono block or non-common ground amps can be used with all pin/blade SDA's and some blade/blade models.
    Gotcha , How does it wire up? You remove the stock SDA cable and use this in it's place? It looks to have Binding posts on the back so you use speaker wire like spades or banana on the amp Transformer side and what on the speaker side? Pins?
    Dan
    My personal quest is to save to world of bad audio, one thread at a time.
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  • Leftplumma
    Leftplumma Posts: 88
    edited February 2013
    FTGV wrote: »
    Used with common ground amps I would think the reduction in DC resistance should improve the bass slam and definition?

    This makes me think that there are other gremlins involved in my setup.
    My bass is far more solid with better extension without any cable hooked up to the SDA side of the speakers.
    Also the mids are somewhat grainy as well.
    Although DK did mention that as a problem when the dreadnought was not fully burned in.
    Polk SDA 1.2 TL
    Infinity SSW-210
    Integra DTR 7.1
    Pioneer SC-57 Elite
    Sony X777ES
    Sansui BA-5000
    Hafler XL 600's in mono w/ George Kay Audio Tube upgrades
    Hafler xl 600 stock
    Krell FPB 600
    Avel 1000VA Dreadnought
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  • drumminman
    drumminman Posts: 3,396
    edited February 2013
    mantis wrote: »
    Gotcha , How does it wire up? You remove the stock SDA cable and use this in it's place? It looks to have Binding posts on the back so you use speaker wire like spades or banana on the amp Transformer side and what on the speaker side? Pins?

    Most Dreadnought users construct the "SDA Cable" out of high quality speaker wire. I made mine with spades on both ends. One end connects to the Pin (or in my case Cardas BP that takes the place of the pin) and the negative speaker BP, and the other end to the DN BP's. Both speakers are connected this way. The DN isolates any grunge that would normally be shunted to ground and passes only the audio signal between the SDA speakers in each cabinet.

    I've used both the 800VA A-L and the 1000VA A-L, both with a common ground amp and a dual mono. The results are very beneficial and easy to hear. There is improvement after burn in (around 30 80 hours), but I would not characterize the sound as harsh or grating on initial start up.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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