SDA SRS2 upgrade thread, starting with blade blade version

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  • xschop
    xschop Posts: 5,745
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    Class D, as far as I know, doesn't have common speaker grounds by their design.
    Don't take experimental gene therapies from known eugenicists.
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  • pitdogg2
    pitdogg2 Posts: 27,775
    edited August 19
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    Schurkey wrote: »
    xschop wrote: »
    The dreadnaught makes Class D feasable with SDAs.

    Including blade/blade? 'Cause that would be new to me. Pin/blade, sure.
    Would "Class D" be any different in that respect to Class A or AB?

    No, blade/blade are 1b version as you know. If both blades carry signal, which I assume they do like all other B/b SDA's then it must be common ground. Unless you can tie the negatives together then you're stuck with one common ground amp.
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  • evhudsons
    evhudsons Posts: 1,182
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    Trey, vr3, converted my blade blade to pin blade when he built my crossovers from scratch, got rid of the mw6009 and went with mw6510 and 6511 drivers.
    I'm using 2 buckeye monoblocks along with treys custom a1 dreadnought, so common ground isn't an issue.
    Polk Audio SDA CRS+ crossover 4.1TL by Trey/VR3 (Rings and custom stand by Larry)-Polk Audio SDA SRS2 crossovers by Trey/VR3Parasound HCA1500aYamaha rxa-3070 with musicast-Celestion SL6S presence,- Monitor Audio Silver rx2, , surround backNHTsuper1's surround, Parasound 1500, Marantz 2230/Technics 1200mk2 Gamertag: IslandBerserker I am but a infinitesimally small point meeting the line of infinity in the SDA universe
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  • xschop
    xschop Posts: 5,745
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    Do your D amps run a little cooler with the Dreadnaught?
    Don't take experimental gene therapies from known eugenicists.
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  • Schurkey
    Schurkey Posts: 2,125
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    I didn't think you could run a Dreadnought with a blade/blade style crossover. Whether original, or aftermarket-modified, I figured you had pin/blade style crossover.

    I did an experiment with my 1B (blade/blade crossover) rewired/modified to run with non-common-ground amplifiers...but it sounded really strange. That experiment lasted about two minutes (maybe less) of playing time before I reconnected the stock blade/blade style wiring and regained normal (really good) sound.
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  • evhudsons
    evhudsons Posts: 1,182
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    Trey did a completely new from scratch crossover. I changed the mid drivers, the interconnect cable he made as well. If I had kept the same blade blade configuration then I would not have been able to do the dreanought. But he didn't modify the crossover, it was completely new.
    Polk Audio SDA CRS+ crossover 4.1TL by Trey/VR3 (Rings and custom stand by Larry)-Polk Audio SDA SRS2 crossovers by Trey/VR3Parasound HCA1500aYamaha rxa-3070 with musicast-Celestion SL6S presence,- Monitor Audio Silver rx2, , surround backNHTsuper1's surround, Parasound 1500, Marantz 2230/Technics 1200mk2 Gamertag: IslandBerserker I am but a infinitesimally small point meeting the line of infinity in the SDA universe
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  • evhudsons
    evhudsons Posts: 1,182
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    So running with both the old and new is preferable you think? I'll see when the new ones come in at some point. I decided not to use just one set of tweeters as the crossover is expecting all four and I don't want to accidentally damage anything by running just one pair. My old ones look fine, but are 40 years old.

    evhudsons wrote: »
    I had two of the old dark SL2000s, plus two clear Silver Coil Domes that had come out of my CRS+.
    That's what I did on my SDA 1Bs. Replaced the primary tweeters, kept the SL2000s for the secondary tweeters.

    Polk Audio SDA CRS+ crossover 4.1TL by Trey/VR3 (Rings and custom stand by Larry)-Polk Audio SDA SRS2 crossovers by Trey/VR3Parasound HCA1500aYamaha rxa-3070 with musicast-Celestion SL6S presence,- Monitor Audio Silver rx2, , surround backNHTsuper1's surround, Parasound 1500, Marantz 2230/Technics 1200mk2 Gamertag: IslandBerserker I am but a infinitesimally small point meeting the line of infinity in the SDA universe
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  • ptrooper
    ptrooper Posts: 551
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    evhudsons wrote: »
    So running with both the old and new is preferable you think? I'll see when the new ones come in at some point. I decided not to use just one set of tweeters as the crossover is expecting all four and I don't want to accidentally damage anything by running just one pair. My old ones look fine, but are 40 years old.

    evhudsons wrote: »
    I had two of the old dark SL2000s, plus two clear Silver Coil Domes that had come out of my CRS+.
    That's what I did on my SDA 1Bs. Replaced the primary tweeters, kept the SL2000s for the secondary tweeters.

    @evhudsons ,Running with the old tweets won't hurt anything! except your ears. lol <3. I want some sda srs 2's too.
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  • evhudsons
    evhudsons Posts: 1,182
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    I had used chatgpt to look at Trey's work, and asked it's opinion, this is what it said, fwiw:

    "One thing I noticed...

    The craftsmanship is excellent.

    I particularly like:

    external SDA inductor boards
    Neutrik SpeakON SDA connector (much better than the old blade/pin mechanically)
    clean cable management
    isolated inductors
    quality board material
    connectorized harnesses for serviceability

    Frankly, this looks like something a boutique speaker company would sell for $15,000+."


    Polk Audio SDA CRS+ crossover 4.1TL by Trey/VR3 (Rings and custom stand by Larry)-Polk Audio SDA SRS2 crossovers by Trey/VR3Parasound HCA1500aYamaha rxa-3070 with musicast-Celestion SL6S presence,- Monitor Audio Silver rx2, , surround backNHTsuper1's surround, Parasound 1500, Marantz 2230/Technics 1200mk2 Gamertag: IslandBerserker I am but a infinitesimally small point meeting the line of infinity in the SDA universe
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