Documenting: My SDA-1c upgrades from start to finish

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  • Gardenstater
    Gardenstater Posts: 4,932
    edited January 2023
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    Those "blanks" in your photos are the templates for cutting the foam material to be used ultimately for the actual gasket? Did you make those on your 3D printer?

    Are you going to use any of Rob's semi-rings anywhere or hurricane nuts everywhere?

    Looking forward to the listening impressions. Enjoy!

    PS: I've tried sharpening Xacto knife blades by hand and I never got a result that compared to a brand new fresh one from the manufacturer.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
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  • plastic_avatar
    plastic_avatar Posts: 747
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    F1nut wrote: »
    Know if anyone moved the poly to the tweeter area...

    Hell no!

    Good to know =)

    Wanted to make sure I set that part up per norm.

    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • plastic_avatar
    plastic_avatar Posts: 747
    edited January 2023
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    Gardenstater wrote: »
    Those "blanks" in your photos are the templates for cutting the foam material to be used ultimately for the actual gasket? Did you make those on your 3D printer?
    Tried on the printer. Had print problems. Cut one from foam based on 3D one. Used it =\
    Are you going to use any of Rob's semi-rings anywhere or hurricane nuts everywhere?
    Yes and everywhere!
    Looking forward to the listening impressions. Enjoy!
    Me, too, and hopefully ;)
    PS: I've tried sharpening Xacto knife blades by hand and I never got a result that compared to a brand new fresh one from the manufacturer.
    Likely my experience, but Ima try my ceramic homer and see if I can squeeze a little more from it. Will report.

    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • skipshot12
    skipshot12 Posts: 2,155
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    On moving the poly with BH5 installed...

    After installing the BH5 I reinstalled the Poly in it's original location.
    Just made sure to fluff it up a bit to cover the cavity as best I could.
    I wouldn't see any reason do anything different...
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  • xschop
    xschop Posts: 5,820
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    Besides the chimera-tweets' sound impressions, I'm looking forward to what front-to-back bracing has on the bass/mid-bass.

    Looking good too.
    Don't take experimental gene therapies from known eugenicists.
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  • plastic_avatar
    plastic_avatar Posts: 747
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    Had to quit for the evening.

    Back said 'Stop leaning over, troll. Sit.'

    So I did, after doubling over at the table while my youngest finished her dinner.

    I mounted 2 mw to try the metal braces out. Super tough to maneuver my 6'4 frame to squeeze my arms in to try and hold stuff while I shake [laughs].

    It's like Disability Twister!

    All the fun, none of the precision!

    I'll mount all 4 mw w/ metal braces tomorrow. Might hold off on front-to-back until I get everything else done.

    I'll mount the new terminal plate, too.

    63utbw1buw65.jpeg
    I'll print better plates later, but these are really nice. I like them as is, but having some that look factory would be nice.

    36v9eqibvdkg.jpeg
    Reglued the magnets.

    uz25nldw8col.jpeg
    BH5!

    n0l7v5vsa9v4.jpeg
    Tidy and symmetrical.
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • skipshot12
    skipshot12 Posts: 2,155
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    Looking very nice p_a.

    Can't wait to hear your thoughts on the difference your mods provide.
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  • dpowell
    dpowell Posts: 3,082
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    BH5 is the final mod I need to do on my SDAs. Some day I'll get to it. Looking good!
    ____________________________________________________________

    polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS, SVS PB13 Ultra X 2, McIntosh C2300, Marantz AV7704, Bob Carver Crimson Beauty 350 Tube Mono Blocks, Carver Sunfire Signature Cinema Grande 400x5, ADCOM GFA 7807, Panasonic UB420, Sim Audio Moon 380D DAC, EPSON Pro Cinema 6050
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  • plastic_avatar
    plastic_avatar Posts: 747
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    Note to self:

    Semi rings are a pain in the arse to install for me. Holy forking shirtballs, @xschop!

    Took me 2 hours to do the first 4.

    Question:

    Anyone else get some pinching on the surrounds with the washers? If I tighten the screws down to where I think they should be, the surrounds deform in, like a reverse bulge.

    Not looking forward to taking everything back apart this coming year to replace the wiring [laughs].

    muu8khmjy527.jpeg
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • xschop
    xschop Posts: 5,820
    edited January 2023
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    The rings should be positioned before the glue dries and make sure glue doesn't get into the threaded taps. Be careful of those washers deforming the butly surrounds also.
    Don't take experimental gene therapies from known eugenicists.
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  • Gardenstater
    Gardenstater Posts: 4,932
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    Yeah you definitely don't want any washer you use to be on top of the surround material. My solution was to make square washers by grinding one side of a #10 square nut and to use that as a washer. Better surface area of contact too and only in a few places where the surround notches were not aligned well did I have to trim a little surround with an Xacto knife.
    i9ncgr7abg5l.jpg
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Onkyo A-8017 integrated
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
    · Share on Facebook
  • plastic_avatar
    plastic_avatar Posts: 747
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    [curses]

    Well, nuts.

    I need different washers...

    [cue unexpected delay sad trombone]
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • xschop
    xschop Posts: 5,820
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    Just go without washers for now. You'll probably have to re-torque again after so many hours of head-banging anyway.
    Don't take experimental gene therapies from known eugenicists.
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  • plastic_avatar
    plastic_avatar Posts: 747
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    Side note:

    Speaker #1 looks wicked with 4 shiny metal 50's rocket-age X-1 bumper teats pointed at me.

    If nothing else, I'll have the coolest looking speakers in my circles ;)

    I'll take the washers off tomorrow. I'll just plan on getting special ones when I do to wiring sometime this year.

    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • F1nut
    F1nut Posts: 52,407
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    Do not use washers of any kind and do not use button head screws. Use cap screws.
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    Unknown
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  • plastic_avatar
    plastic_avatar Posts: 747
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    Hey there, @nooshinjohn.

    I listen to everything *everyone* says =)

    I don't have the kind of bolts F1 suggests, so I took off the washers and will use the bolts I have for now.

    There's a difference between respecting recommendations and dismissing them.

    I never dismiss them.

    The recommendations for standard practice on some parts of my build(s) aren't ignored, ever! If I decide to experiment, I do it with thought, research, and learning something new in mind.

    If you have something to add, jump in.

    But please don't pee in my pool.
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • Unknown
    Unknown
    edited January 2023
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  • ken brydson
    ken brydson Posts: 9,101
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    F1nut wrote: »
    Do not use washers of any kind.

    Sometimes washers are needed....

    2w7hxxspwf9m.jpg


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  • audioluvr
    audioluvr Posts: 6,079
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    Yikes! ∆∆∆
    Gustard X26 Pro DAC
    Belles 21A Pre Upgraded with Mundorf Supremes
    B&K M200 Sonata monoblocks refreshed and upgraded
    Polk SDA 1C's modded / 1000Va Dreadnaught
    Wireworld Silver Eclipse IC's and speaker cables
    Harman Kardon T65C w/Grado Gold. (Don't laugh. It sounds great!)

    There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January. by Dr. Sardonicus
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  • skipshot12
    skipshot12 Posts: 2,155
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    ken brydson wrote: »
    F1nut wrote: »
    Do not use washers of any kind.

    Sometimes washers are needed....

    2w7hxxspwf9m.jpg


    Holy flippin doodle good buddy!

    Customer reports they think their tires need a rebalance 🤣
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  • skipshot12
    skipshot12 Posts: 2,155
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    nooshinjohn wrote: »
    F1nut wrote: »
    Do not use washers of any kind and do not use button head screws. Use cap screws.

    Is he going to pay any attention to what you say anyway? Tell him to use cap screws and he will switch to pop-rivets...

    Hope this was a kindly ribbing or joke…
    If not, this was a tad harsh.
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  • Unknown
    Unknown
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  • skipshot12
    skipshot12 Posts: 2,155
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    Cool…
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  • audioluvr
    audioluvr Posts: 6,079
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    skipshot12 wrote: »
    Cool…

    Haaa haa haa! Some people are so Gullible!
    Gustard X26 Pro DAC
    Belles 21A Pre Upgraded with Mundorf Supremes
    B&K M200 Sonata monoblocks refreshed and upgraded
    Polk SDA 1C's modded / 1000Va Dreadnaught
    Wireworld Silver Eclipse IC's and speaker cables
    Harman Kardon T65C w/Grado Gold. (Don't laugh. It sounds great!)

    There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January. by Dr. Sardonicus
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  • plastic_avatar
    plastic_avatar Posts: 747
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    I have decided to answer all previous interjections with homemade memes, because I care that much.

    And, well, because if something is a joke, it should be clear.

    And name calling ain't a nice way to clarify intent. Especially someplace where we should be supportive.

    orevmrw6loef.jpeg
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
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  • Unknown
    Unknown
    edited January 2023
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  • Clipdat
    Clipdat Posts: 13,104
    edited January 2023
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    :p;):p;):p;):p;):p;):p;):p;):p;):p;)
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  • plastic_avatar
    plastic_avatar Posts: 747
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    e5o6vv4xftgq.jpeg
    The Thrifty Setups in Mah House Big thrifty stereo in the basement w/ my custom SDA-1C (built with help from kind forum members) * Beautiful 1966 MCM GE console upgraded w/ Bluetooth, Dual turntable, and Paradigm speakers in family room * Swanky 1980 Realistic system and great TEAC eq with dancing colored lights in the living room * custom 5B on a system for my Dad * Ye Olde college stereo in the garage
    · Share on Facebook
  • Unknown
    Unknown
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    This content has been removed.