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  1. #1

    Member Sales Rating: (0)

    Join Date
    Feb 2009

    Default I finally got my SDA 2's xover mods completed

    Last summer I purchased a pair of SDA2B's. I listened to them and found them hard sounding on the top end with the SL2000 tweets. I purchased a pair of new tweets and it sounded better but not great. I placed them in the garage with a receiver to burn the tweeters in and the same sound emitted.
    A fellow Polkie George Daniels told me to do the crossover upgrades and that it would transform the 2B's. I kept putting the ordeal off until the New Year.
    I could really kick myself for not doing this earlier. The 2B's are fast, transparent and present a pretty good sound stage which I hear will get better with time as all capacitors burn in. I use a Clarity Cap 12uf for the tweeter section. All other caps were Solens and I used Mundorf MOS resistors and removed the polyswitch and put a mundorf resistor in it's place.
    I'm in the 2nd week of it burning in. I can tell you I like what I hear. I have a friend that is trying to buy them from me as we speak. I have a pair of ET LFT16's and 2 pair of Spica's. The sound stage on the 2B's is nearly as good as the Spicas and getting better everyday. They blow the ET's out the water. I remind you the ET's are a bookshelf speaker. They will be for sale within the next week. For now my search for a large floor standing speaker that does not bloat my room with bass may be over.

    My system: VanAlstine Super PAS3si modded by Tom Tutay of Transition Audio Design, Dynaco ST70 modified by Tom Tutay, Arcam DV78 DVD player w Scott Nixon Tube DAC and a wideband transformer on the digital out, Systemdek IV ( not the IIX mind you) electronic turntable with a Rega RB600 arm and Audio Technica AT OC9MRII cartridge with a Hagerman Piccolo head amp, all plugged in to a Furman Line conditioner. I have recently added a Teac 3340s Reel to Reel. I have 1 pr Spica TC50's and my previous main speakers are Spica TC60's. and last a Pair of Dali Suite 12" acoustic suspension powered subs. All wire is by Transition Audio Design with a piece of Straightwire interconnect on the phono.
    "That's All Folks!"
    Last edited by PonMan; 01-20-2010 at 05:26 AM. Reason: Adding in equipment:

  2. #2

    Member Sales Rating: (47)

    Join Date
    May 2005
    Sufficiently Breathless


    Great to see you Posting Pon Man,,, guys and girls,, This man is a walking Encyclopedia when it comes to audio,, glad to hear that you are pleased with the upgrades.Hopefully we will see you posting more,,, blues,, did I mention that,,, this man knows his blues and jazz. Welcome to the club,,and congrats on the upgrade.
    JC approves....he told me so. (F-1 nut)

  3. #3

    Member Sales Rating: (1)

    Join Date
    Jan 2010


    Ponman -

    Congratulations on your newly discovered sound! I will be redoing the crossovers in my speakers in the next month or so. While you are at, try resealing the drivers with Mortite, you can get it at Home Depot. They will greatly enhance your bass defintion. Read DarqueKnights recommendations on applying Mortite and do not overuse! Use only one strand where the ring meets the basket on the midrange and PR.

    My next project is redoing the SDA cable perhaps this weekend or next to improve soundstage even further.

    Let us know your thoughts after you applied the Mortite!

  4. #4

    Member Sales Rating: (37)

    Join Date
    Nov 2008
    N.E. Ohio


    Great Job!

    The modified 2B is an exceptional speaker. I had both my SDA-2B's and SDA SRS 2's rebuilt in November of 2009 and have been in audio heaven since. Mine were modded with Sonicaps which took a good 300 hours to season.

    Did you replace the tweeters with original SL2000's, replacement RDO-194's, or add the 5.8uf bypass cap and "TL" them with the RDO-198?
    VTL ST50 w/mods/RCA6L6GC/TlfnknECC801S
    CJPV-5 w/mods
    TT CJ Sonographe SG3 Oak/Sumiko LMT/Grado Wood Plat/Sumiko PIB2/The Clamp
    Musical Fidelity A1 CDPro
    Tuners w/mods Kenwood KT5020/Fisher KM60
    MF x-DAC V8, HAInfo NG27
    Herbies Ti-9/Vibrapods/MIT Shtgn AC1 IEC's/MIT Shotgun 2 IC's/MIT Shtgn 2 Speaker
    PSAudio Cryo PwrPrt Prem/ExctPwrEP15A
    Wlnt SDA 2B TL/Oak SDA SRS II TL-Sonicaps/Mills/Cardas/Cust SDA ICs/Mortite/Dynamat Extreme/TFLF Rings/FSB-2 Spikes
    NAD SS rigs w/mods
    GIK panels

  5. #5

    Member Sales Rating: (0)

    Join Date
    Mar 2008


    Hey PonMan great to hear you got the mods to the SDA's up and and running. I'm coming over for a listen.

    If you still have the SL-2000's I may be interested...

    I've been meaning to give you a call. I actually have an ST-70 in the house but have it hooked up to the Axioms and not my SDA 2's. Your ears won't bleed with the Dynaco/Axiom combo but after doing some pretty thorough listening tests, they won't bleed with the McIntosh/Axiom combo either. The ST-70 is from someone in town who mods them. He'll want to see/hear your system.

    Maybe we can set something up for this Saturday.

  6. #6

    Member Sales Rating: (43)

    Join Date
    Nov 2006


    Pics or it didn't happen!
    Welcome to club Polk.
    Please. Please contact me a ben62670 @ Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.

  7. #7

    Member Sales Rating: (1)

    Join Date
    May 2008
    Kotzebue, Yes that Kotzebue

    Default Good to hear

    Glad to hear that you liked the transformation of your 2B's. I have a set in storage down in the states that I hope to do the XO upgrade on, (TL) soon.
    I recently updated the XO's on my 1C Studios and so far so good.
    See you around,
    Home Rig

    SDA-1C Studios ('Pimped') I know they are only studios, but hey.
    Polk 1000p Center
    Pioneer Elite SC35 Receiver (Pre/Surround and Amplification duties!!!!)
    Sunfire Cinema Grand 5X200-Now in storage after repairs
    OPPO BDP-93
    Stepped up to name brand Speaker Cables and interconnects!
    Monitor 7's, 10's, SDA 1B's, 2B's, 2.3TL's, all in storage waiting for me.
    Sales Rating #1!!

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