CRS+ RestoMod

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  • F1nut
    F1nut Posts: 52,406
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    Standoffs.

    You can replace with aluminum hex standoffs, which come in various lengths and various male/female versions.
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  • SCompRacer
    SCompRacer Posts: 9,399
    edited May 19
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    You can get standoffs in plastic or brass too. Nobody may see them but you'll know they are there. Available in 4-40, 6-32, 8-32.....

    EDIT: Mouser has plastic barbed ones too.

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    https://www.mouser.com/ProductDetail/Heyco/10154F-P?qs=vHuUswq2%2BsxFzbMtOF2bBw==&mgh=1&utm_id=22410597967&utm_source=google&utm_medium=cpc&utm_marketing_tactic=amermsp&gad_source=1&gad_campaignid=22400569371&gbraid=0AAAAADn_wf3JE7FbfBrjtkEtwSMaGt0XJ&gclid=Cj0KCQjwlLDQBhDjARIsAPlIefFUJJxZJ8h9pu--8_zQ2iqWkRSkfSgeTVvBR_lUzjWRcMwZS0lvTJEaAlycEALw_wcB

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    Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ * Signature Series Sonore Music Server w/Deux PS * Roon * Gustard R26 DAC / Singxer SU-6 DDC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 *
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  • xschop
    xschop Posts: 5,837
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    But if they're metal, they could wear thru and short two adjacent traces.
    Don't take experimental gene therapies from known eugenicists.
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  • VSAT88
    VSAT88 Posts: 1,383
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    Awesome as always brother! Thank you for the ultimate show and tell!
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  • F1nut
    F1nut Posts: 52,406
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    xschop wrote: »
    But if they're metal, they could wear thru and short two adjacent traces.

    I've never heard of that happening, but they also sell nylon hex threaded standoffs, so you can sleep better at night.
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  • Unknown
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    edited May 19
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  • SCompRacer
    SCompRacer Posts: 9,399
    edited May 19
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    Is it OK to use metric in an older Polk speaker?
    :D

    I've got some 7C's I ought to get into.

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    Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ * Signature Series Sonore Music Server w/Deux PS * Roon * Gustard R26 DAC / Singxer SU-6 DDC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 *
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  • xschop
    xschop Posts: 5,837
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    pitdogg2 wrote: »
    Dave @westmassguy sent M4 size for my stand off XO project for the RTA11 XO. Nylon hex stand off and nylon all thread with stainless M4 pan head machine screw/bolts to connect the stand offs to the binding post spool and XO board to the top of the stand off.

    Ordered an M4 kit.
    That one that resides right between the 2 large inductors had to be surgically removed.
    Will have to get crafty to redo that one. Gorilla glue aint budgin'.
    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
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    Settled on X-over bracket design. Ordered some stronger black oxide M4 low-profile button heads. They'll bolt to female end of standoffs thru the thicker acrylic plates and be electrically isolated. Don't trust the 35 y/o pcb coating.
    Installing a single stainless barrel nut with copper antiseize and a large solid brass thumb screw for the outside bling...

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    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
    edited May 22
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    Started the drivers...

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    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
    edited May 22
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    Stay focused...

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    Had some time and knocked out the brass
    grill pegs...

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    Made a couple extra rings 0.540" tall for some MW6500s...😁

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  • xschop
    xschop Posts: 5,837
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    Brass RDO's...

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    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
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    SCompRacer wrote: »
    Is it OK to use metric in an older Polk speaker?
    :D

    I've got some 7C's I ought to get into.

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    Are those 7C's with SL1000's I see on the boxes?
    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
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    pitdogg2 wrote: »
    I'm afraid to ask.....

    Yes, I put bacon on everything.
    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
    edited May 24
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    About 0.050" clearance all around...

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    Don't take experimental gene therapies from known eugenicists.
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  • SCompRacer
    SCompRacer Posts: 9,399
    edited May 24
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    Boxes say 7C but speakers have what looks like the sl2000 tweeters. Serial numbers of speakers match serial on boxes.

    Styrofoam stuck on corners, other wise in nice shape.

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    Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ * Signature Series Sonore Music Server w/Deux PS * Roon * Gustard R26 DAC / Singxer SU-6 DDC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 *
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  • Gardenstater
    Gardenstater Posts: 4,944
    edited May 24
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    The first year the 7C came out, it had the SL1000, then all the ones after that had the SL2000. According to @DeRod the enclosure walls are thicker on the 7C, than the 7B.
    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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  • xschop
    xschop Posts: 5,837
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    We'll see if the 0.020 sag is gone permanently in a couple days from this 6511.
    Used the weighted coil centering spud and heated the spider gradually. Its back to normal for now...

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  • xschop
    xschop Posts: 5,837
    edited May 24
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    First of their species...

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    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
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    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
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    Don't take experimental gene therapies from known eugenicists.
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  • xschop
    xschop Posts: 5,837
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    I may go back with a finer grit...kj6am6nft7kf.jpg
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  • SIHAB
    SIHAB Posts: 5,837
    edited May 25
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    :)
    Speakers: Polk Lsim, ATC SCM19 v2, NHT SuperzeroSpeaker Cables: DH Labs, Transparent, Wireworld, Canare, Monster: Beer budget, Bose ears
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  • F1nut
    F1nut Posts: 52,406
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    Any plans to clear coat the brass?
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  • Unknown
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    edited May 25
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  • xschop
    xschop Posts: 5,837
    edited May 25
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    F1nut wrote: »
    Any plans to clear coat the brass?

    I'm doing a finer grit now, and then scotchbrite pad. Then I'll use Mothers diatomaceous. On 360 grade brass, should maintain its luster for a long time.

    I went with a full 6" diameter and drilled the cabinet fasteners further out to brace the rear of cabinet that much more.
    These things are heavy.

    It's lunch time.Going get myself a chicken bacon sandwich.
    Happy Memorial Day friends...





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  • xschop
    xschop Posts: 5,837
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    pitdogg2 wrote: »
    F1nut wrote: »
    Any plans to clear coat the brass?
    Give it a few weeks, it will clearly be coated with Verdigris
    😉

    Ivan, I have some old machined 360 brass part offs and it hasn't oxidized much. The alloy is almost like day one from years ago...The OG shop speakers have taken a lickin' no doubt. Still jazzin'....

    m7s4k9fvhj03.jpg
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  • F1nut
    F1nut Posts: 52,406
    edited May 25
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    xschop wrote: »
    F1nut wrote: »
    Any plans to clear coat the brass?

    I'm doing a finer grit now, and then scotchbrite pad. Then I'll use Mothers diatomaceous. On 360 grade brass, should maintain its luster for a long time.

    Ok, well a few other options are lacquer for brass or Renaissance wax

    https://www.woodcraft.com/products/mohawk-lacquer-for-brass-gloss-aerosol-13-oz

    Edit: If you use the spray lacquer be sure to clean the brass first with a degreasing agent.

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