Free Shipping on All Orders 1-866-764-1801

Vist our Online Store
+ Reply to Thread
Page 6 of 6 FirstFirst ... 2 3 4 5 6
Results 151 to 166 of 166
  1. #151

    Member Sales Rating: (31)

    Join Date
    Feb 2007
    Location
    Long Island
    Posts
    14,733

    Default

    Ok, I thought it said 130+55, I think it's time for some glasses. :)

    I would use two 90/91's, it's better to split the values in half than use uneven values.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  2. #152

    Member Sales Rating: (0)

    Join Date
    Jul 2010
    Posts
    2

    Default oh yeah

    just got done making SRS "2.1TL" and they sound SWEET, thanks inspiredsports for doing all the research

  3. #153

    Member Sales Rating: (37)

    Join Date
    Nov 2008
    Location
    N.E. Ohio
    Posts
    5,369

    Default

    Quote Originally Posted by Vraad View Post
    just got done making SRS "2.1TL" and they sound SWEET, thanks inspiredsports for doing all the research
    Super! Remember to give them a chance to season a bit; it takes almost one hundred hours for the RDO's to open up and maybe three times longer for the Sonicaps.

    What kind of gear are you driving them with, and were you using other Polk speakers before?
    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

  4. #154

    Member Sales Rating: (0)

    Join Date
    Jul 2010
    Posts
    2

    Default

    driving them with a Yamaha m-70 into a Toshiba c-15 pre, had a pair of model 10's before which are now on garage duty. was trying to get a moscode amp and Yamaha c-2x pre, but I need funds other places now. oh and man do they sound sweet

  5. #155

    Member Sales Rating: (4)

    Join Date
    Apr 2003
    Location
    3 moves from check mating you
    Posts
    3,073

    Default

    I just read this thread through and since I need some more 194's for a few sets of Polk classics, why not do the 198 TL w/cap upgrade in the future on my SRS2s. Thanks alot for doing the research and all who put their advice into this also.

    Now this is for the 4 ohm version(I'm thinking it was) or no?
    Nevermind, I just read the answer in a newer thread tonight all about the 475.00 pr.

    What a deal. The blade blade is.....TL able.
    Last edited by Tony M; 08-28-2010 at 12:08 AM.
    Most people just listen to music and watch movies . I am glad to be a part of a select group that tries to take our auditory and visual senses to a higher level: we EXPERIENCE them.... GOT SDA?...GOT SUNFIRE? ...GOT Maggies?

  6. #156

    Member Sales Rating: (37)

    Join Date
    Nov 2008
    Location
    N.E. Ohio
    Posts
    5,369

    Default

    Quote Originally Posted by tony millard View Post
    I just read this thread through and since I need some more 194's for a few sets of Polk classics, why not do the 198 TL w/cap upgrade in the future on my SRS2s. Thanks alot for doing the research and all who put their advice into this also.

    Now this is for the 4 ohm version(I'm thinking it was) or no?
    Nevermind, I just read the answer in a newer thread tonight all about the 475.00 pr.

    What a deal. The blade blade is.....TL able.
    The only real downside to the 4 ohm blade/blade design is that it uses some very big caps in the low pass circuit that cost a bit more.
    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

  7. #157

    Member Sales Rating: (4)

    Join Date
    Feb 2007
    Location
    Austin TX
    Posts
    772

    Default

    OK, I guess I'm kind of confused here. So what else is new! :D I'm not a electronics person, and hardly know the difference between a resistor and a capacitor! Trying to figure out what needs to be done to get this upgrade done. Ben told me the blade/blade SRS 2's can not be tl'd. All I want is to get similar improvements to the SRS's as I did with the 2B's when I upgraded them. What do I need to do, and who can do this for me. Somebody please help.
    Sunfire Theater Grand IV
    Sunfire Cinema Grand Signature
    SRS 2.1TL
    SDA 2BTL's
    CSiA6
    FXiA4
    FXiA6
    SDA 2A's
    Monitor 10A's

    http://www.douglasconnection.com

  8. #158

    Member Sales Rating: (0)

    Join Date
    May 2006
    Location
    The Seasonally Frozen Wastelands
    Posts
    1,103

    Default

    Quote Originally Posted by helipilotdoug View Post
    Trying to figure out what needs to be done to get this upgrade done. Ben told me the blade/blade SRS 2's can not be tl'd.
    Old information. When replacing the capacitors, instead of installing a 4.4uf capacitor in the high-frequency section, install a 5.8uf capacitor. Then buy and install 4 RDO-198 tweeters in place of the 2000/194 units. Done.

    I'm thinking the jury is still out in terms of TL-ing the PIN-blade SRS2 along with the companion SDA-1C.

    Quote Originally Posted by helipilotdoug View Post
    All I want is to get similar improvements to the SRS's as I did with the 2B's when I upgraded them. What do I need to do, and who can do this for me. Somebody please help.
    This thread, and others here at Club Polk have all the details.


    Short story:
    Lift the fiber fill packing back into place if gravity has pulled it too far downward over time.
    Fresh capacitors of the same effective values as is already installed EXCEPT the one-per-speaker 5.8uf instead of the 4.4 described above; AND you can simply eliminate the 750pF unit.
    Fresh resistors of the same values as is already on the board.
    Eliminate the polyswitches (some folks recommend adding additional resistance equal to the resistance offered by the polyswitch. I chose to NOT add resistance to make up for the polyswitches; and I feel the HF is STILL not loud enough on my 1Bs; your mileage may vary.
    Replace the SL2000 tweeters with RDO-198
    Damping material on the mid-woofers and passive radiators
    Assure the drivers are mounted "air tight" to the cabinets by applying rope caulk (and perhaps using the stainless steel mounting rings supplied by another member here)

    Put it all back together while assuring that you connect the wires to the correct places. The new tweeters will require a minor modification to the wire harness to connect one of the blades on each tweeter.

    You can do this all yourself. I did, and I'm no rocket scientist. Nice weekend project.

  9. #159

    Member Sales Rating: (4)

    Join Date
    Feb 2007
    Location
    Austin TX
    Posts
    772

    Default

    OK, I've pulled the trigger on this upgrade on the SRS 2 to SRS 2.1tl's. Ben is ordering all the necessary upgrade parts while Sonicraft has the sale on, and I'll be sending him crossovers tomorrow from 1b's for the upgrade. That way I'll still be able to listen to the SRS 2's while they are being rebuilt. Inspiredsports, thanks for all your outstanding, well documented progress on this. Without your experimentation and documentation of it, I'd not be doing it.
    Sunfire Theater Grand IV
    Sunfire Cinema Grand Signature
    SRS 2.1TL
    SDA 2BTL's
    CSiA6
    FXiA4
    FXiA6
    SDA 2A's
    Monitor 10A's

    http://www.douglasconnection.com

  10. #160

    Member Sales Rating: (37)

    Join Date
    Nov 2008
    Location
    N.E. Ohio
    Posts
    5,369

    Default

    I wanted to revisit this thread and post an important update.

    It took me a long time to get this done, but I purchased pairs of Mill resistors in 1/2 ohm increments from 3.5 down to .5 as I was never entirely pleased with the volume of treble coming out of my modified SDA STS 2's. The TONE was always fine, but the relative OUTPUT from the top end of the crossover seemed several db's too laid back.

    It always perplexed me that the initial resistor from the black speaker wire terminal was a 3.5 ohm. NOTE the identically set up (but smaller cabinet and 12" passive) 1986 SDA-1B has a 2.0 ohm resistor in the first spot. That was always counter intuitive to me as it seemed the smaller cabinet would put out LESS bass and require proportionatley less treble.

    When completed, I always seemed to want another 5 or 6 db of treble, as borne out when I had my NAD 1700 pre hooked up with parametric tone controls that allowed me to boost 12K and up by a max of 6db. Perfect!

    At any rate, I finally got around to removing the 3.5 ohm resistor and soldering in 2 pins in the sockets. It was then easy to remove the passive radiator and quickly clip different value resistors between these 2 pins, button the cabinet back up and take measurments and listen.

    Those who followed my re-entry to this hobby back in 2008 might recall I loved (still do) my TL'd 2B's and wanted that same sound quality from the much larger and more authoritative SDA SRS 2 cabinets.

    I've tried .5, 1.0, 1.5, 2.0, 2.5, 2.7 and 3.5 ohm resistors. My measurements show about a 1.4db treble boost per .5 ohm decrease.

    The .5 ohm and 1.0 ohm test sounded a little too bright. The 2.5's and 3.0's still a bit too laid back.

    The 1.5 and 2.0 ohm tests sounded just right, at approximately 6 and 7 db gains respectively.

    At any rate, the 1.5's are in place right now as I listen to my new MoFi Cars Candy-O Gold CD. I'm 50/50 1.5 versus 2.0 right now, so I guess I'm going to order a pair of 1.8's from Sonic Craft and audition before I declare this mod complete.

    To those who have performed this mod with a 3.5 resistor as originally specified (or a 4.0 if your removed the polyswitch), please stay tuned.

    Greg
    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

  11. #161

    Member Sales Rating: (0)

    Join Date
    May 2006
    Location
    The Seasonally Frozen Wastelands
    Posts
    1,103

    Default

    I've always believed that my 1Bs were shy on treble. When I removed the SL2000 from the upper positions and installed a pair of 198s and re-capped the crossover, I deleted the polyswitches and did not add a compensating resistor. Added a small aftermarket "ribbon" (actually planar) tweeter crossed in at 10 or 11K. It never occurred to me to lower the value of the resistor from the stock 2 ohm value. May be my ears, may be my room, or may be my taste...but I'm happy now. SOMEDAY, maybe, I'll get the second pair of 198s for the lower positions. I suppose I should follow your lead (again) and change resistors while disabling the ribbons.

    Not surprised you wanted more treble output, especially since you should have additional bass/midrange compared to my smaller 1Bs.
    Last edited by Schurkey; 09-10-2011 at 12:11 AM.

  12. #162

    Member Sales Rating: (37)

    Join Date
    Nov 2008
    Location
    N.E. Ohio
    Posts
    5,369

    Default

    Quote Originally Posted by Schurkey View Post
    I've always believed that my 1Bs were shy on treble.

    Not surprised you wanted more treble output, especially since you should have additional bass/midrange compared to my smaller 1Bs.
    That wasn't exactly my point. I was making the assumption the stock 1B was probably properly voiced with a 2.0 ohm resistor.

    What didn't make sense to me was the SDA SRS 2 should have theoretically had a similar or LOWER value resistor to BOOST its treble because theoretically the larger cabinet and 15" versus 12" passives would put out more bass per unit of input power.

    I know it's not that simple when all of the elements in the circuit are considered, but in my opinion the 3.5 ohm resistor really attenuated the amount of treble reaching ears.
    Last edited by inspiredsports; 09-10-2011 at 12:10 AM.
    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

  13. #163

    Member Sales Rating: (0)

    Join Date
    May 2006
    Location
    The Seasonally Frozen Wastelands
    Posts
    1,103

    Default

    Quote Originally Posted by inspiredsports View Post
    I was making the assumption the stock 1B was probably properly voiced with a 2.0 ohm resistor.
    In my opinion...in my room...yada yada...the 1Bs (at least MY 1Bs) are NOT voiced properly. But of course you've figured that out from my prior post.

    Quote Originally Posted by inspiredsports View Post
    What didn't make sense to me was the SDA SRS 2 should have theoretically had a similar or LOWER value resistor to BOOST its treble because theoretically the larger cabinet and 15" versus 12" passives would put out more bass per unit of input power.
    Yes, I understood. Perhaps I didn't express it well.

    I wonder how using the 1.5 ohm resistor (compared to the 2-ohm units in the 1B) compares to my adding a "supertweeter". Your solution is clearly more elegant.

  14. #164

    Member Sales Rating: (37)

    Join Date
    Nov 2008
    Location
    N.E. Ohio
    Posts
    5,369

    Default

    We are clearly playing in uncharted (and unapproved mod) territory here, but the first resistor connected to the black speaker wire connection controls how much energy makes it to the tweeters.

    Less resistance (a lower ohm value) allows more energy (volume) to reach the tweeter(s).

    In my situation, after adding the 5.8 uf cap and switching the SL2000/RDO194 tweeters to RDO198's, the treble was clearly on the lean side so I systematically set out to conquer the problem and have finally figured it out.
    Last edited by inspiredsports; 09-10-2011 at 12:39 AM.
    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

  15. #165

    Member Sales Rating: (4)

    Join Date
    Feb 2007
    Location
    Austin TX
    Posts
    772

    Default

    I have done the upgrade now to SRS 2.1tl, and am so happy with what I'm hearing. When Ben rebuilt my crossovers, he put 2.7 ohm resistors where the 3.5's were, and so far the balance seems perfect. I'm at close to 100 hours now, and everything seems wonderful. A Big THANK YOU for your exploration and this thread. Without your hard work and documentation, I'd never have done this.
    Doug
    Sunfire Theater Grand IV
    Sunfire Cinema Grand Signature
    SRS 2.1TL
    SDA 2BTL's
    CSiA6
    FXiA4
    FXiA6
    SDA 2A's
    Monitor 10A's

    http://www.douglasconnection.com

  16. #166

    Member Sales Rating: (37)

    Join Date
    Nov 2008
    Location
    N.E. Ohio
    Posts
    5,369

    Default

    Quote Originally Posted by helipilotdoug View Post
    I have done the upgrade now to SRS 2.1tl, and am so happy with what I'm hearing. When Ben rebuilt my crossovers, he put 2.7 ohm resistors where the 3.5's were, and so far the balance seems perfect. I'm at close to 100 hours now, and everything seems wonderful. A Big THANK YOU for your exploration and this thread. Without your hard work and documentation, I'd never have done this.
    Doug
    I was going to hold off posting until all of my testing is done but didn't want to not respond.

    I've been subbing in resistors, letting them burn in a bit and then taking FR measurements. I'm on the 2.5 ohm Mills right now with 2.7 and 3.0 still in the queue. I'll post graphs when I'm all done, but the bottom line is, based upon my measurements of the 2.5's, I think 2.7's will prove to yield the absolute flattest response curve. I think you've got it just right.
    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

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. Need Help SDA-2B Crossover Parts List
    By inspiredsports in forum Vintage Speakers
    Replies: 102
    Last Post: 10-28-2011, 05:14 PM
  2. Need Help Where did all the parts list go?
    By engtaz in forum Vintage Speakers
    Replies: 22
    Last Post: 09-05-2009, 09:49 PM
  3. Need Help SRS 2 Crossover Parts List?
    By Lasareath in forum DIY, Mods & Tweaks
    Replies: 10
    Last Post: 08-14-2008, 07:44 PM
  4. SDA-SRS Crossover parts list?
    By jfb4548 in forum Vintage Speakers
    Replies: 2
    Last Post: 11-05-2005, 02:44 PM
  5. Crossover upgrades to 2.3 Parts List
    By BobMcG in forum Vintage Speakers
    Replies: 17
    Last Post: 06-19-2005, 10:31 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts