the nerve of them

I just saw these in today's Central Jersey C/L. they are Dyna Audio SDA 2.8 speakers. There are real Polk SDA models for sale but this caught me by surprise. Is there a trade mark infringement here or is SDA a scientific name for all to use ? Other wise some ok speakers this month going on.

http://cnj.craigslist.org/ele/5385774498.html

http://cnj.craigslist.org/ele/5427261833.html

http://cnj.craigslist.org/ele/5395184478.html
2chl- Adcom GFA- 555-Onkyo P-3150v pre/amp- JVC-QL-A200 tt- Denon 1940 ci cdp- Adcom GFS-6 -Modded '87 SDA 2Bs - Dynamat Ext.- BH-5- X-Overs VR-3, RDO-194 tweeters, Larry's Rings, Speakon/Neutrik I/C- Cherry stain tops Advent Maestros,Ohm model E

H/T- Toshiba au40" flat- Yamaha RX- V665 avr- YSD-11 Dock- I-Pod- Klipsch #400HD Speaker set-

Bdrm- Nikko 6065 receiver- JBL -G-200s--Pioneer 305 headphones--Sony CE375-5 disc

Comments

  • Those are SDA speckers not speakers prob solved B)
    Yamaha RXA1030, Yamaha CD-S2100, Yamaha AS-2200, Bluesound node 2i
    Polk SDA2btl highly modded
    Polk SDA 1C modded
    Polk CS350 LS x2
    Kimber 8TC
    Sony 55" Bravia
    Wish list SVS sub

  • mhardy6647
    mhardy6647 Posts: 32,926
    edited February 2016
    It may be that Polk trademarked "Stereo Dimensional Array" but not "SDA" and/or the trademarks may have lapsed at some point in the ensuing decades -- just speculating, though.

    It' s also possible that the company in question just decided to use the letters and wait for a "cease and desist" letter that might, or might not, have ever come.

    EDIT: Well, a data point. Looks like "Stereo Dimensional Array 1" and "SDA-1" were trademarked, according to the manual at http://www.polksda.com/pdfs/SDA1.pdf
    Perhaps (?!??) Polk only trademarked specific model names. Perhaps.

    That said, there are probably a dozen folks here who know the answer and won't just be speculatin'... at this point, I'll defer to true experts.
  • The little bit of research I did, indicates the Dynalabs are "white van" speckers
  • Awesome, white vanners, I knew something was amiss here. They do play on manufacturers models and nomenclature a lot it seems one must be very vigilant when buying stuff on C/L and as we know very rarely will there be an honest deal in a parking lot. Dynalab certainly are not Dynaudios...lol Here's a big list of w.v.


    http://www.ebay.com/gds/White-Van-Scam-Fake-Speakers-Audio-AV-List-/10000000177653117/g.html
    2chl- Adcom GFA- 555-Onkyo P-3150v pre/amp- JVC-QL-A200 tt- Denon 1940 ci cdp- Adcom GFS-6 -Modded '87 SDA 2Bs - Dynamat Ext.- BH-5- X-Overs VR-3, RDO-194 tweeters, Larry's Rings, Speakon/Neutrik I/C- Cherry stain tops Advent Maestros,Ohm model E

    H/T- Toshiba au40" flat- Yamaha RX- V665 avr- YSD-11 Dock- I-Pod- Klipsch #400HD Speaker set-

    Bdrm- Nikko 6065 receiver- JBL -G-200s--Pioneer 305 headphones--Sony CE375-5 disc
  • soundfreak1
    soundfreak1 Posts: 3,374
    Or dynaco for that matter.
    Main Rig:
    Krell KAV 250a biamped to mid/highs
    Parasound HCA1500A biamped to lows
    Nakamichi EC100 Active xover
    MIT exp 1 ic's
    Perreaux SA33 class A preamp
    AQ kingcobra ic's
    OPPO 83 CDP
    Lehmann audio black cube SE phono pre, Audioquest phono wire (ITA1/1)
    Denon DP-1200 TT. AToc9ML MC cart.
    Monster HTS 3600 power conditioner
    ADS L1590/2 Biamped
    MIT exps2 speaker cable