SDA CRS or CRS+

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Grabber70Mach
Grabber70Mach Posts: 74
in Vintage Speakers
So I went a did a thing yesterday. These speakers were orphaned and I decided to give them a new home. Drove a little over 2 hours to pick them up. And as a bonus got to spend the day with my son. As the title says I'm not sure if they are SDA CRS or the CRS+. Need to get an interconnect cable or thinking about making one like in this thread.
https://forum.polkaudio.com/discussion/202082/sda-crs-crossover-recap/p2
Would like to find the ends that @DeRod used on page 2. If that will work for me. Planning on running them as they are for the time being and then figure out rebuilding the caps and possibly replacing the tweeters. Also thinking about making a set of stands like the factory ones but would need to find the measurements first. zzbf47p7legv.jpg
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  • xschop
    xschop Posts: 5,838
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    I vote CRS+.
    Nice score.
    Don't take experimental gene therapies from known eugenicists.
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  • Unknown
    Unknown
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  • F1nut
    F1nut Posts: 52,406
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    Pin/blade says CRS+.
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  • Grabber70Mach
    Grabber70Mach Posts: 74
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    Couple other pictures after looking at them this afternoon.

    ie3xcbjx32ph.jpg
    804qvhbrquyg.jpg
    i8dhoyxwjebq.jpg
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  • F1nut
    F1nut Posts: 52,406
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    CRS+
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  • Grabber70Mach
    Grabber70Mach Posts: 74
    edited March 31
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    Thanks for all the information so far. I'm glad to hear that they are the CRS+.

    For the interconnect cable, would it be better to:
    1. Purchase one from ebay
    2. DIY with cable like this: https://a.co/d/059c9RoO
    and use a male RCA end and disregarding the flat terminal.
    3. DIY with the same cable but utilizing the speakon ends and changing the female sockets on the speakers.

    Does anyone have a set of the original stands that they would take measurements of, I'd like to make a set.
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  • Grabber70Mach
    Grabber70Mach Posts: 74
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    Toolfan66 wrote: »
    Grabber70Mach wrote: »
    Thanks for all the information so far. I'm glad to hear that they are the CRS+.

    For the interconnect cable, would it be better to:
    1. Purchase one from ebay
    2. DIY with cable like this: https://a.co/d/059c9RoO
    and use a male RCA end and disregarding the flat terminal.
    3. DIY with the same cable but utilizing the speakon ends and changing the female sockets on the speakers.

    Does anyone have a set of the original stands that they would take measurements of, I'd like to make a set.

    If you're going to make your own, make better looking ones, and make them the full width of the speaker..

    b6d8qzgvrseg.png

    Yes that is the plan. What height should they be? Length of bottom foot? Appears to be 1" tube to me. Should I go with a thicker or thinner gauge of steel? I assume thicker would be better.
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  • billbillw
    billbillw Posts: 8,287
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    If you're going to weld up a set, make sure to leave some holes to fill them up with dampening material like sand, aquarium gravel, etc. You could probably drill holes after and plug them up with a panel hole plug.
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  • VSAT88
    VSAT88 Posts: 1,383
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    To answer your question. the original stands are 25" tall. 14.5 wide. Just measured mine. Depth on top is 7" bottom is 13". Not that you need that if you are building your own I do not guess...
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  • Grabber70Mach
    Grabber70Mach Posts: 74
    edited April 1
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    Thank you @VSAT88. I am going to build my own and appreciate you taking the time to get the measurements. I'm sure I'll make them the full width of the cabinets like @Toolfan66 suggested, but the height and depth is what I wanted to know. This will allow me to make sure that they are stable. Thanks again.
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  • F1nut
    F1nut Posts: 52,406
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    You should make the stands tall enough to have the tweeters at ear height. I found them too short and added tall spikes to increase the height. Still shorter than I would have liked.

    Also, the speaker should be isolated from the stand by resting on rubber pads or the like.
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  • HzTweaker
    HzTweaker Posts: 1,136
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    Here is some more info/ builds for the CRS stands:

    https://forum.polkaudio.com/discussion/40273/crs-stands-dimensions

    https://forum.polkaudio.com/discussion/173995/sda-crs-budget-build/p1
    2ch rig: Speakers: LSi9s with VR3's Fortress mods Preamplifier: Parasound P5 DAC: Fiio K13 Amplifier: Parasound A23 CDP: Pioneer DV-563A Cables: Wireworld Equinox 7 XLR ICs, Wireworld Ultraviolet 7 USB, AudioQuest Q2s, AudioQuest NRG X(preamp)

    Standby: Magnepan LRS w/Magna Riser stands
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  • Grabber70Mach
    Grabber70Mach Posts: 74
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    Thanks @HzTweaker
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  • HzTweaker
    HzTweaker Posts: 1,136
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    No problem. I'm looking forward to see what you come up with. :)
    2ch rig: Speakers: LSi9s with VR3's Fortress mods Preamplifier: Parasound P5 DAC: Fiio K13 Amplifier: Parasound A23 CDP: Pioneer DV-563A Cables: Wireworld Equinox 7 XLR ICs, Wireworld Ultraviolet 7 USB, AudioQuest Q2s, AudioQuest NRG X(preamp)

    Standby: Magnepan LRS w/Magna Riser stands
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  • Grabber70Mach
    Grabber70Mach Posts: 74
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    Would this be a decent amplifier to run these speakers: Integra Stereo Power Amplifier - Model ADM-2.1
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  • F1nut
    F1nut Posts: 52,406
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    No
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  • billbillw
    billbillw Posts: 8,287
    edited April 3
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    I'd say if you already have that amp, it will work, but it won't be the best match for the CRS+. I certainly wouldn't buy one unless it was less than $20. We probably need some more information on how you plan to set these up. What is your source/Preamp? How big is the room? How loud do you listen typically?
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  • bcwsrt
    bcwsrt Posts: 2,691
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    Oh, boy. Good thing we’re not dealing with @velvetfog here.

    Brian

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  • billbillw
    billbillw Posts: 8,287
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    I don't think the warm and fuzzy lover is here anymore. The thread got deleted.
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  • Grabber70Mach
    Grabber70Mach Posts: 74
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    billbillw wrote: »
    I'd say if you already have that amp, it will work, but it won't be the best match for the CRS+. I certainly wouldn't buy one unless it was less than $20. We probably need some more information on how you plan to set these up. What is your source/Preamp? How big is the room? How loud do you listen typically?

    No I'm looking to purchase a used amplifier on a budget. This is a new setup I'll be putting in my living room, the room is about 14x15. I don't really listen too loud but occasionally will turn it up a bit. I do have a Reisong-Boyuurange-EL-34 that I could possibly use.
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  • Grabber70Mach
    Grabber70Mach Posts: 74
    edited April 3
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    Another option I found that's close to me. A Rotel RB-1070 or a Adcom GFA-555.
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  • billbillw
    billbillw Posts: 8,287
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    The Rotel should power those well.
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  • Grabber70Mach
    Grabber70Mach Posts: 74
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    billbillw wrote: »
    The Rotel should power those well.

    Was hoping to pick it up today but so far no response from the seller.
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  • F1nut
    F1nut Posts: 52,406
    edited April 4
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    I'm no fan of Rotel amps. Ridiculous damping factor ratings means tons of negative feedback, which means it doesn't sound good.
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  • billbillw
    billbillw Posts: 8,287
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    The Adcom 555 should also have good amounts of power, but beware that at their age, it may need some refreshing of worn capacitors or other parts.
    Also, F1 nut probably won't agree that anything other than Musical Fidelity is worth your time :D
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  • dromunds
    dromunds Posts: 10,174
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    I am also a big fan of Musical Fidelity amps
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  • xschop
    xschop Posts: 5,838
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    billbillw wrote: »
    The Adcom 555 should also have good amounts of power, but beware that at their age, it may need some refreshing of worn capacitors or other parts.
    Also, F1 nut probably won't agree that anything other than Musical Fidelity is worth your time :D

    I thought he was only down for the Crown amp.
    Don't take experimental gene therapies from known eugenicists.
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  • billbillw
    billbillw Posts: 8,287
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    xschop wrote: »
    billbillw wrote: »
    The Adcom 555 should also have good amounts of power, but beware that at their age, it may need some refreshing of worn capacitors or other parts.
    Also, F1 nut probably won't agree that anything other than Musical Fidelity is worth your time :D

    I thought he was only down for the Crown amp.

    I think I worded that wrong last night after a 3.5 hour Easter Vigil service...
    Musical Fidelity is the only thing worth his time?
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