Need help w/ SDA A1-I Interface Cable

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  • Kenf616
    Kenf616 Posts: 24
    edited March 2005
    Oh okay...I was typing as you were posting the edits...so I didnt see them.
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  • F1nut
    F1nut Posts: 50,561
    edited March 2005
    Man, I'm bug eyed too. From what I gather the Carver(s) is not a common ground amp, but you're running them and everything is ok. Is that correct?

    I think the wise thing to do, whether they are common ground or not, run single or bi-amped is to make a AI-1. I'd sleep better at night if it was me.
    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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  • Kenf616
    Kenf616 Posts: 24
    edited March 2005
    Jesse,

    I know...ditto for me...way past bug eyed ! Yes, I have them currently horizontally biamped as of last night after getting Ken's email. Yes, I checked everything I knew of to make sure there was no problem at all. Just last night was so late when I finished, I was way too tired to listen critically.

    Only after reading Raife's post about the Adcom not sounding as good biamped horizontally, did I start to wonder about my setup. And, now I think I am hearing similiar things that Raife observed.....that is all.

    I am starting to think the same thing...about looking for a higher powered Carver amp, and just run 1 amp in stereo. I just missed one today after seeing it on Ebay yesterday. But, I wanted to get THIS sorted out before I went in another direction. It was a TFM-55X which would have been perfect. Damnit....grrrr. I saw it early enough and everything, I just didn't know if I needed it, so I didnt pull the trigger.
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  • F1nut
    F1nut Posts: 50,561
    edited March 2005
    So, is Tour correct that the M500t's can not be bridged?
    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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  • Tour2ma
    Tour2ma Posts: 10,177
    edited March 2005
    Jesse,
    The 500's can be bridged, which would make me think "common ground", but there is something weird in their design.... as if Ken's e-mail wasn't enough evidence of this...

    Bug-eyed is an apt description...
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • F1nut
    F1nut Posts: 50,561
    edited March 2005
    Originally posted by Tour2ma

    ....but there is something weird in their design.... as if Ken's e-mail wasn't enough evidence of this...


    Yeah, agreed. Well, if they can be bridged then Ken should try them that way with a AI-1. At 500wpc that should be all one would ever need.
    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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  • Kenf616
    Kenf616 Posts: 24
    edited March 2005
    Jesse,

    Yes, they can be bridged....of that I am certain. And, yes, 500wpc would certainly be enough.

    So Tour2ma, can you walk me through the connection as if I had the AI-1 in place? Is it simply using a Y jack for each amp to front preouts, and for each amp to speaker connection, it would be how?

    Thanks,
    Ken
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  • Kenf616
    Kenf616 Posts: 24
    edited March 2005
    Tour2ma,

    Disregard that last question.....I think I know the answer there.
    I guess I'll start to round up some of the materials for the AI-1 first thing tomorrow.

    Thanks again,
    Ken
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  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited March 2005
    My NAD's do not bridge with any y-cable, they have a little throw switch on the back, I dont have Carver, they dont have this? I thought they did. When running bridged mono on a stereo amp you are floating the ground, normally connecting each speaker cable to the positive posts of its respective amp, your connect running to left input on the amp from the pre. Well at least thats the way mine work, but hesitiate because your working with Carver, so I am out, Jesse and Tour have at it you both have owned Carver, I just missed that amp Russman had I think it was TFM-45.

    Ken what I can tell you is that the NAD mono bridged (~500 wpc @ 6ohm) to the 1C sound awesome in my cave room, yes smaller speaker but with the Dodd pre I am talking 4 to 5 clicks not even a quarter turn on the gain and they are singing. I was really worried that bridged mode would turn the warmth of the stereo NAD harsh but nope, its as close to nirvana as I have gotten thus far.

    RT1
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  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited March 2005
    OOPs forgot to say, Please do not try this bridging without the AI-1 connect.

    RT1

    Edit--I see you know this and posted while I was typing.
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited March 2005
    EDIT: Ted, most Carvers have a button for bridging, but not the 500... It requires jumpering the output.

    Ken,
    If you are horizontally bi-amping, you already have splitters in place at the pre-outs... yes?

    The AI-1 opens all the possibilities... bridging, and vertically bi-amping as well as horizontal...

    To bridge... no splitter needed. Manual should tell you which amp input to use, and (I think) which outputs to jumper on the amp and which to connect to a speaker.

    To vertically bi-amp... should just be a matter of moving the splitters to the amp end of the interconnects and picking a channel for the tweeters and a channel for the MW's on each amp.

    Since roughly 80% of the power requirement is in the bass, and the 500 has the ability to share power between channels, vertical bi-amping should be an improvement over horizontal, and competitive with bridging.
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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  • Kenf616
    Kenf616 Posts: 24
    edited March 2005
    Reeltrouble,

    Thank you for all of your input. I'm glad you are "there" with your system. I am still struggling here, but have learned so much. After I complete the AI-1, I will be seeing the light at the end....
    Stay close please, I may need your expertise in this area.

    P.S. I used to have the Studio 1B's...bought them in Hawaii as I was getting out of the military. They were my very first Polks ever, and I loved them. I tried to help my bro get into the Polk arena, by selling them to him at a great price. In hindsight, I shouldn't have.....After several moves, he didnt take care of them very well, and I think he sold them at some point because he needed money, I'm not sure. He doesn't mention it, and I don't ask.....still sucks though

    Thanks again,
    Ken
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  • Kenf616
    Kenf616 Posts: 24
    edited March 2005
    Tour2ma,

    Okay, I didn't know about jumpering the output. So when the time comes, I'll need all the details please.

    And, yes, the splitters are in place at the preouts, 4 cables from the amps into 2 preouts.

    A diagram for Mono connection is shown on the back of the amp:

    It says to combine both inputs with a y cord (splitter),
    and at the speaker terminals, connect red (+) in the upper
    left, and connect black (-) in the lower right as you are looking at the back panel on the amp.

    In this way, the Red and Black Chassis Ground Terminals are avoided. I am currently using each Black Chassis Ground terminal on each amp with the Horiz. Biamp setup.

    Thanks very much for being there every step Tour2ma, I really appreciate it !!
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited March 2005
    Ken, you're welcome, glad to be of whatever help I can be.

    Apparently I do not have a manual for the M-500t, so afraid I can offer no more specifics on bridging it. Your manual should have all the details.
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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