Polk Audio SDA SRS 1.2TL Crossover Modification Thread

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  • Drenis
    Drenis Posts: 2,871
    edited March 2013
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    Did you re-use the stock internal wiring between the terminal plate and crossovers? It looks brand new and so cleanly installed if it is in fact stock wire.

    Also, change out those old shotty jumpers.

    Gosh I want my new crossovers sooo bad!
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  • VR3
    VR3 Posts: 29,756
    edited March 2013
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    Did you re-use the stock internal wiring between the terminal plate and crossovers? It looks brand new and so cleanly installed if it is in fact stock wire.

    That is the stock wiring, the last generation of SDAs I believe used all white wiring which was completed extremely neat! :)

    Also, change out those old shotty jumpers.

    Me and Richard talked about this - it is on the list! :)

    Gosh I want my new crossovers sooo bad!

    Soon! :-P

    Larry - let me know man! :)

    Richard - I am glad to hear you are enjoying them and cant wait to hear your thoughts as they burn in! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited March 2013
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    More pictures for fun!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    Even more pictures!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    Thanks guys!
    Lasareath wrote: »
    Nice! Are those mine?

    The ones in the middle are yours Sal! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    More 1.2TL pics!! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    This one starts tomorrow -

    Tweeter Network -
    Clarity Cap MR (All the way)
    Mundorf Mox Resistors
    Jantzen Inductors

    Midbass/SDA Network -
    Clarity Cap ESA
    Jantzen Inductors

    Custom shelf that attaches to the stock crossover plate for a drop and go install, powered coated satin black
    Delrin substrate that mounts to the shelf, nylon stand offs between substrate and shelf
    Point to point wiring
    Round Aluminum terminal plates
    WBT Binding Post
    9 awg SDA Cable, NL4 Connections
    Will be a drop in replacement...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    Yeah this is going to be "bad ****"
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    Thanks man -

    I cleared the inbox -

    I do not have any inductors but I am about to do a Jantzen order any day... :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    MR caps reporting for duty - SIR!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    I added that! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    It is just like blue heat shrink, nothing special! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    The whole tweeter network - roughed in - caps not connected
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    Test mount - top plate where all of the molex connections will go - this is just a test fit - don't like the stand offs on the corners, most likely will scrap that as they are not needed and it bends the bottom board - will look into alternate mounting... :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited April 2013
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    This is going to be SICK!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • headrott
    headrott Posts: 5,496
    edited April 2013
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    Those are beautiful Trey!
    Relayer-Big-O-Poster.jpg
    Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
    "I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion." :\
    My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....

    "Green leaves reveal the heart spoken Khatru"- Jon Anderson

    "Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee
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  • zane77
    zane77 Posts: 1,696
    edited May 2013
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    Nice work, as always
    Home Theater
    Onkyo PR-SC5508 Sharp LC-70LE847U
    Emotiva XPA-5 Emotiva XPA-2 Emotiva UPA-2
    Front RTi-A9 Wide RTi-A7 Center CSi-A6 Surround FXi-A6 Rear RTi-A3 Sub 2x PSW505
    Sony BDP-S790 Dishnetwork Hopper/Joey Logitech Harmony One Apple TV
    Two Channel
    Oppo 105D BAT VK-500 w/BatPack SDA SRS 2.3 Dreadnought Squeezebox Touch Apple TV
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  • VR3
    VR3 Posts: 29,756
    edited May 2013
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    Thanks guys, much appreciated!

    This is definitely a mod that looks cooler in person. It is such a large crossover...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • lightman1
    lightman1 Posts: 10,803
    edited May 2013
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    Makes me want to move back to NC! Detail oriented as always, Trey.:wink:
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  • treitz3
    treitz3 Posts: 20,366
    edited May 2013
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    It does look much nicer in person. We miss you Lightman1. Even though you are a slacker, it sucks you are down there. SOOOooo much going on up here right now.....but enough about that. LMK when you head up here next. BTW, PM me your new phone #.

    Big Daddy T.
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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  • VR3
    VR3 Posts: 29,756
    edited May 2013
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    Russ!!! Are you coming back to NC anytime soon??

    This mod looks way cooler in person. I do not think the picture really capture the size of the mod...

    Thanks guys!! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • VR3
    VR3 Posts: 29,756
    edited May 2013
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    Ohhhh yeah!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • DarqueKnight
    DarqueKnight Posts: 6,765
    edited May 2013
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    Are you going to connect the ends of the two side panels to cut down on vibration?
    Proud and loyal citizen of the Digital Domain and Solid State Country!
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  • nooshinjohn
    nooshinjohn Posts: 26,160
    edited May 2013
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    Have you calculated how much internal volume this XO is going to take up inside the box? There is only 6.77 cubic feet inside the SRS and these monsters look like they will take up at least a foot of that.


    Looks great Trey. I do volunteer to do a field test for you.:mrgreen:
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2800 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon MiND2 Shunyata Triton/Typhon Rotel RP9400 Turntable

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson

    How many flies need to be buzzing a dead horse before you guys stop beating it?
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  • VR3
    VR3 Posts: 29,756
    edited May 2013
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    I think there is a lot of confusion on how this is built -

    The shelf is mounted to the crossover plate. The shelf itself is all one piece of aluminum and the sides are welded to the bottom shelf. The aluminum itself is air craft grade aluminum, extremely dead material as is.

    Once the delrin substrate it mounted to it via the nylon washers, all I can manage to make the aluminum do is "thud"... it is extremely dead. I am actually impressed just how dead it is.

    As far as strength, you could literally stand on the welded portion and with the Delrin mounted on to it - you can not even flex the sides.

    Thanks guys! :)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • drumminman
    drumminman Posts: 3,396
    edited May 2013
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    Toolfan66 wrote: »
    I think it looks fantastic, and I can tell its a solid piece. I am more concerned with it affecting airflow to the passives..

    I don't think airflow is a concern. My understanding is that the backwave pressure created by the MW's is what drives the passives, and this would only be affected by diminishing the internal volume of the cabinets. I doubt these Xovers would have that much effect on the volume. Disclaimer: this is all IMHO.

    BTW, Nice work Trey!
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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  • VR3
    VR3 Posts: 29,756
    edited May 2013
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    Thanks guys!

    air flow should not be an issue... There will be approximately 2" or more on each side of space, approximately 1.5" or more along the back plus all of the open space in the center.

    Plus air will pass through the spaces between the components as well...

    I actually spent a good hour drawing out different shelf ideas and this one made the most sense.

    interestingly enough this has enough room to mount all MR caps if you relocate the large inductor....
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Systems
    Systems Posts: 14,872
    edited May 2013
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    attachment.php?attachmentid=84655&stc=1&d=1367198805

    I would not add any electrical insulation to those IMHO (blue heatshrink).
    May not make alot of difference being that short, but will make a difference.
    I would never add an unneeded dielectric.

    JMHO, and YMMV.

    Beautiful work BTW!
    As usual Trey, beautimus work!:cheesygrin:
    Testing
    Testing
    Testing
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  • VR3
    VR3 Posts: 29,756
    edited May 2013
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    Lol... Come on Paul... That's like 1.5" of heat shrink.....

    Thanks man!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Systems
    Systems Posts: 14,872
    edited May 2013
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    Cotton maybe, but personally I would never use polyolefin.
    Testing
    Testing
    Testing
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