RD0 Billet Faceplate Upgrade

Options
13»

Comments

  • xschop
    xschop Posts: 5,833
    Options
    Toolfan66 wrote: »
    xschop wrote: »
    Aesthetics is one thing. I prefer the black and billet look. But if you're worried about oxidation, don't. I built these 6061 billet baffle plates a few years ago and they're untreated and unwaxed/polished even....

    5nn2w1gb8y4x.jpg

    I always wanted to build a set of monitor 7's out of billet aluminum..

    That'd definitely fix any baffle flex.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • Tony M
    Tony M Posts: 12,015
    Options
    The grills would retire to the closet if I had fronts that looked that darn good. ;)
    Most people just listen to music and watch movies. I EXPERIENCE them.

    “Anger is an acid that can do more harm to the vessel in which it is stored than to anything on which it is poured.”
    --Mark Twain.

    “If at first you don't succeed, then skydiving definitely isn't for you.” - Steven Wright
    · Share on Facebook
  • plastic_avatar
    plastic_avatar Posts: 747
    Options
    o.O

    Whoa.
    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
  • Gardenstater
    Gardenstater Posts: 4,937
    Options
    How thick is that 6061 T6(?) aluminium baffle? What is the Young's Modulus? Just kidding with the 2nd question ;)
    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
  • xschop
    xschop Posts: 5,833
    Options
    0.625 inch @ 40,000 psi.

    What do you think the particle board modulus is?😂
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    Options
    Toolfan66 wrote: »
    xschop wrote: »
    Aesthetics is one thing. I prefer the black and billet look. But if you're worried about oxidation, don't. I built these 6061 billet baffle plates a few years ago and they're untreated and unwaxed/polished even....

    5nn2w1gb8y4x.jpg

    I always wanted to build a set of monitor 7's out of billet aluminum..

    If I were to go that route, I would mount the MW and tweeter on one of the sides and have the passive pointed to either side. Slim, Tall 7's.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • Gardenstater
    Gardenstater Posts: 4,937
    edited March 2022
    Options
    xschop wrote: »
    0.625 inch @ 40,000 psi.

    What do you think the particle board modulus is?😂

    ***Nerd Alert***Nerd Alert***

    MOE (Modulus of Elasticity)

    6061 T6 68.9 GPa = 9.99 x 10^6 psi
    18mm Particle Board = 2.048 GPa = 2.97 x 10^5 psi
    18mm MDF = 3.326 GPa = 4.82 x 10^5 psi
    16mm Particle Board = 3.424 GPa = 4.97 x 10^5
    16mm MDF = 3.010 GPa = 4.37 x 10^5

    This is from a Chinese study (of course) that I found the other day. Pretty weird the difference in MOE for MDF vs Particle Board for 18mm (approx 3/4") thickness.

    ag70wme9v6qa.jpg


    https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=ma6061t6
    https://www.fpl.fs.fed.us/documnts/pdf2019/fpl_2019_guan001.pdf
    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
  • Gardenstater
    Gardenstater Posts: 4,937
    Options
    The 18mm PB panels they tested were lower density than the 16mm and than the MDF, by far. I wonder if the same holds true everywhere.......

    136e4ws4kcqq.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
  • xschop
    xschop Posts: 5,833
    edited March 2022
    Options
    If it is MIC, then it's a crapshoot.
    You trusted your melamine baby formula...just sayin'
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • Unknown
    Unknown
    Options
    This content has been removed.
  • Gardenstater
    Gardenstater Posts: 4,937
    edited March 2022
    Options
    For Made in USA Aurauco, standard PB (Duraflake) vs standard MDF:(Trupan)

    MOE (Modulus of Elasticity):

    PB: 350,000 psi = 2.41 GPa
    MDF: 420,000 psi = 2.90 GPa

    So it kind of bears out the Chinese paper, as far as the MDF being quite a bit stiffer.

    https://na.arauco.com/en/resources/download/DURAFLAKE_PB_STANDARD
    https://na.arauco.com/en/resources/download/TRUPAN_spec-Standard
    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
  • Unknown
    Unknown
    Options
    This content has been removed.
  • xschop
    xschop Posts: 5,833
    Options
    1st class.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • txcoastal1
    txcoastal1 Posts: 13,520
    Options
    This thread is sick!! B)

    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    Options
    As long as the perimeter of the silk diaphragm interfaces with them and the throat ID of the plate snugly, you're golden.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • VR3
    VR3 Posts: 29,749
    Options
    Delrin?

    I don't know if it is this thread but I saw an aluminum baffle and it looked badddd ****
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    Options
    I don't want you to have any surprises with your new gaskets/insulators, but you may end up having to trim them around the RDO magnet top plate bosses.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    edited March 2022
    Options
    Toolfan66 wrote: »
    xschop wrote: »
    I don't want you to have any surprises with your new gaskets/insulators, but you may end up having to trim them around the RDO magnet top plate bosses.

    Nope, already tried the fit up early this morning, won't be a problem..

    Good deal. Just wanted you to be aware that the factory RDO bosses are designed a few thousands shorter than their diaphragms to ensure compression once magnet screws are tightened down, yet not overtorquing diaphragm plastic.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    Options
    That is true, but you COULD be introducing an uneven compressabilty around dome perimeter that you need to look out for. Those 4 new areas of plastic that will now reside between adjacent bosses could resonate. Hopefully not since it is only .010" thick. Just an FYI
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    Options
    Hey @Toolfan66, don't know who has that crafty polishing tool, but I don't need it and appreciate the offer sending it out.

    I got another personal set of modded RDO plates programmed on CNC with their new radius to try in the XS-TL's...

    If they exibit the off-axis response like the Dayton plates do, then Ill swap the RDOs back in....

    y0r6qcpbwils.jpg

    j69fyhb2zejm.jpg


    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • Unknown
    Unknown
    Options
    This content has been removed.
  • xschop
    xschop Posts: 5,833
    edited July 2023
    Options
    My phalanges are invaluable. I now have a diamond tip insert that is producing the rainbow sheen there. So this next batch will be as close as you can get to a Scotchbrite finish.😉

    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • msg
    msg Posts: 10,650
    Options
    I thought I read in passing on one post that it takes a while? I could be making that up. In fact, it's likely.
    I disabled signatures.
    · Share on Facebook
  • F1nut
    F1nut Posts: 52,406
    Options
    What takes a while?
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    Options
    F1nut wrote: »
    What takes a while?

    Trying to find a vintage set of Polks that don't look like they've been used for target practice.
    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook
  • msg
    msg Posts: 10,650
    edited July 2023
    Options
    F1nut wrote: »
    What takes a while?

    Nevermind; I misremembered when Rob said it was his fingers that were the reason for post-polishing. That was in response to Ivan's question, but my post was hit with the Vanilla Time Drift.

    Same thing that happened to the USS Nimitz. They made a documentary about it.
    63jbaj4rcven.png
    I disabled signatures.
    · Share on Facebook
  • xschop
    xschop Posts: 5,833
    Options
    msg wrote: »
    I thought I read in passing on one post that it takes a while? I could be making that up. In fact, it's likely.

    'Fraid of a little elbow grease? There's always black paint too...

    bharb6daxa9w.jpg

    Don't take experimental gene therapies from known eugenicists.
    · Share on Facebook