All the Polk SDA upgrades located in one place!

VR3VR3 Posts: 21,757
edited June 2015 in Vintage Speakers
I figured this would help some folks find all the tweaks!

If I missed any, please let me know! Please let me know if there is a better link than the one I used as well!

Thanks!


http://vr3mods.com/LCSDAUpgrade.php
Post edited by KennethSwauger on
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Comments

  • VR3VR3 Posts: 21,757
    edited June 2012
    Link was added on how to remove Hot glue 06/14/12
  • nooshinjohnnooshinjohn Posts: 15,886
    edited June 2012
    Congrats on becoming a STICKY!:cheesygrin:

    And thanks for the link... This is a brilliant idea that was long overdue imho.
  • Toolfan66Toolfan66 Posts: 13,018
    edited June 2012
    Yes a great Idea!!


    Thanks!!
  • VR3VR3 Posts: 21,757
    edited June 2012
    Updated 6/15
  • napnap Moderator Posts: 1,319
    edited June 2012
    Posted this in the other thread but I didn't want it to get glossed over. Some info from Matthew Polk regarding the Bass Brace:

    Tony –

    The “Bass-Brace” was introduced as a recommended modification for the SRS 1.2 and was available free for the asking. The kit was composed of nothing more than a piece of all-thread, ?” I think, with a t-nut for the back of the cabinet and an selection of wall anchors. All late production SRS models came with the t-nut already installed in the back of the cabinet plugged with a bolt to seal the hole. (Note: when the all-thread is screwed into the cabinet it will often wind Dacron around it like cotton candy jamming in place and requiring removal of a driver to free-up.)



    The “Bass-Brace” did make a noticeable difference in bass performance. Slam and speed were noticeably improved. If you anchored to a masonry wall the difference was really quite dramatic, more than you’d get from improving your speaker cables and even better than spikes.



    However, the real reason for the Bass-Brace was not initially to improve performance. Around that time new industry safety guidelines were issued for loudspeakers which included a “tip test”. The tip test specified that with the speaker placed on an inclined plane at 10 deg. (as best I recall) it would not tip over in any orientation. Needless to say, the SRS products did not pass. That was a real problem and with an inventory of product already in the warehouse we needed a solution. The solution was the Bass-Brace which when installed prevents the speaker from tipping over. But, when trying it out we realized it also made a significant performance improvement. So, it became both a performance modification and a safety feature. However, it was very difficult to install and I doubt many SRS owners ever enjoyed the benefits. Over Amy’s objections I did install mine and anchored them to an 18” thick brick and masonry wall. It was very impressive.



    Hope that helps



    -msp


    Cheers. :cool:
  • VR3VR3 Posts: 21,757
    edited June 2012
    Thanks Nap

    Updated page for information on common ground amplifiers and Dreadnou
  • vstarkwellvstarkwell Posts: 328
    edited June 2012
    VR3 wrote: »
    I figured this would help some folks find all the tweaks!

    If I missed any, please let me know! Please let me know if there is a better link than the one I used as well!

    Thanks!



    http://vr3mods.com/LCSDAUpgrade.html

    I have a SDA II owners manual if you're interested in adding it to your link?
  • VR3VR3 Posts: 21,757
    edited June 2012
    Sure!

    Can you email it to me?

    Vr3Mods@GMail.com

    thanks!
  • vstarkwellvstarkwell Posts: 328
    edited June 2012
    VR3 wrote: »
    Sure!

    Can you email it to me?

    Vr3Mods@GMail.com



    thanks!

    Sorry I missed this earlier, email has been sent.
  • VR3VR3 Posts: 21,757
    edited June 2012
    Added SDA 2 manual!

    Thanks!
  • JMSSDA2B88JMSSDA2B88 Posts: 12
    edited June 2012
    When I bought my SDA 2B Studios back in 1988, the salesman gave me a pamphlet that detailed how the salespeople were supposed to demonstrate the SDA's. A lot of it was positioning of the speakers and is covered under the owner's manual. It also included 3 pages of songs to demonstrate the abilities of the SDA's. The guy said they normally didn't give out this pamphlet. I'll send it to you tonight/tomorrow and you can look it over and see if you want to post it under other information.
  • VR3VR3 Posts: 21,757
    edited June 2012
    Fixed some broken links, all links now point to an external source

    Added sales brochure/general setup information
  • VR3VR3 Posts: 21,757
    edited June 2012
    Added link to 40 page pdf to help ID vintage Polk models
  • VR3VR3 Posts: 21,757
    edited July 2012
    Updated 7/20 to include crossover design and progressive point source info

    Thanks!
  • PolkieManPolkieMan Posts: 2,444
    edited August 2012
    You know I see all these SDA ads and reviews selling on Ebay for like $10
    I wish we had a place to put every old ad and review in one place.
  • VR3VR3 Posts: 21,757
    edited August 2012
    find them and I will add it!
  • PolkieManPolkieMan Posts: 2,444
    edited August 2012
    I will go digging
    VR3 wrote: »
    find them and I will add it!
  • PolkieManPolkieMan Posts: 2,444
    edited August 2012
    Scan_Pic00020.jpg


    Scan_Pic00030.jpg



    I can do a better scan but the larger file size will not post
    PolkieMan wrote: »
    I will go digging
  • VR3VR3 Posts: 21,757
    edited August 2012
    Updated 8/29/12

    Refined the organization, added a few more links, updated some info

    Thanks
  • VR3VR3 Posts: 21,757
    edited August 2012
    Added Link on how to convert a SDA1 to a SDA 1A
  • headrottheadrott Posts: 4,946
    edited August 2012
    Trey, can you add the "bass brace" mod that Raife did for his 1.2TL's and/or SRS's please? I didn't see it on your page, and others may like to read up on how Raife did it. Thanks Trey.
  • VR3VR3 Posts: 21,757
    edited August 2012
    I actually searched for this when I first did the page... no such luck finding the link...

    Do you by chance have it?

    Thanks
  • EndersShadowEndersShadow Posts: 14,202
    edited August 2012
    VR3 wrote: »
    I actually searched for this when I first did the page... no such luck finding the link...

    Do you by chance have it?

    Thanks

    Trey, look at post 32 here: http://www.polkaudio.com/forums/showthread.php?123136-SDA-Driver-Seals-Original-Foam-vs.-Mortite-vs.-Armaflex-Foam&p=1640225&viewfull=1#post1640225
  • VR3VR3 Posts: 21,757
    edited August 2012
    ADDED and done :-D

    Thanks
  • EndersShadowEndersShadow Posts: 14,202
    edited August 2012
    VR3 wrote: »
    ADDED and done :-D

    Thanks

    No problem! That site is a great reference I am glad to help get built so when my SDA time comes, bam no work to find all this crap, just head to your site and start printing :biggrin:
  • VR3VR3 Posts: 21,757
    edited August 2012
    Yup yup....

    I try to keep an eye on new stuff and obviously as I do mods I learn more and More, like the 1A information...

    Fun stuff either way :)
  • headrottheadrott Posts: 4,946
    edited August 2012
    Wow, you guys are too quick! Anyway, thanks Ender and VR3.
  • EndersShadowEndersShadow Posts: 14,202
    edited August 2012
    headrott wrote: »
    Wow, you guys are too quick! Anyway, thanks Ender and VR3.

    Its what happens when you have insomnia, you stare at the computer most of the night :biggrin:....

    That and I love you guys enough to google search and track it down :wink:
  • VR3VR3 Posts: 21,757
    edited August 2012
    Jimmy Johns fast... FREAKY
  • VR3VR3 Posts: 21,757
    edited September 2012
    Added the SDA Handbook by Ray!
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