Repairing speakers
GramKracka
Posts: 8
I have a pair of monitor 70s series 2. I had them in storage for a little bit and I've noticed that the screws that hold the woofers into the cabinet have rusted. Anyone know what kind of screws these are and where I can get some? TIA
Answers
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Remove one screw and post a few photos of it.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Here are some pictures
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those do not look too bad, I've seen a lot worse. Clean them off with a wire brush.
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That was one of the better ones. There are some that are far worse
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I see them on amazon but they seem to be in metric sizes. You will need to measure the ones you have with whatever means you have. A dial caliper would be ideal.
https://www.amazon.com/Hexagon-Socket-Tapping-Stainless-Speaker（100/dp/B09M9WR756?th=1
^Good luck telling that China seller exactly what diameter you want. Seems to be no way I can see lol.
Parts Express has some sizes:
https://www.parts-express.com/search?keywords=cap head wood screwsGeorge / 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 -
Those are self tapping socket cap screws. No idea what size you have, so you'll have measure one. Likely a metric size.
Here are some examples.
https://www.rtlfasteners.com/RC/mm.htmlPolitical Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Thank you for the link
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This one has ability to specify exact size you want to order:
https://www.amazon.com/dp/B0CR8M4TBV/ref=sspa_dk_detail_0
M4 x 20 would be my "guess"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 -
The whole screw is an inch long and takes a 3mm allen wrench.
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One inch is 25mm. You need the measurement of the threaded area not including the head, so I'm guessing the threaded area is 20mm (3/4") long.
Metric screw diameters are noted as M4, M6, M8, etc. Chances are yours are M4 or M6.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Take it your local hardware store.
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Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Yeah I've gone to 3 hardware stores with no luck
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I'd take them to the wire wheel, poke them through a piece of cardboard, dust a little black paint on the heads and call it a day.
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Do you have advice on where to buy black paint?- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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--Gary--
Onkyo Integra M504, Bottlehead Foreplay III, Denon SACD, Thiel CS2.3, NHT VT-2, VT-3 and Evolution T6, Infinity RSIIIa, SDA1C and a few dozen other speakers around the house I change in and out. -
Naval jelly will remove the rust.
https://www.homedepot.com/p/reviews/Loctite-Naval-Jelly-16-fl-oz-Rust-Dissolver-553472/203009241/1
SDA SRS 2.3TL's
Silk Audio MS-90-BT integrated tube amp
Yaqin MS-20L integrated tube amp
SDA 2B TL's -
My advice to up your game is to have a baby and that way you don't sleep... Ever
😅👀- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
If you're replacing all the screws, they don't necessarily need to be a socket head screw as long as the thread is the same, and the head has a good base..
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michaeljhsda2 wrote: »Naval jelly will remove the rust.
https://www.homedepot.com/p/reviews/Loctite-Naval-Jelly-16-fl-oz-Rust-Dissolver-553472/203009241/1
Does it matter whose navel it comes from?
Askin' for a friend.
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Mid-States Bolt and Screw can hook you up. Send them a pic and dimensions. -
mhardy6647 wrote: »michaeljhsda2 wrote: »Naval jelly will remove the rust.
https://www.homedepot.com/p/reviews/Loctite-Naval-Jelly-16-fl-oz-Rust-Dissolver-553472/203009241/1
Does it matter whose navel it comes from?
Askin' for a friend.
It's jelly from the Navy not from someone's navel.SDA SRS 2.3TL's
Silk Audio MS-90-BT integrated tube amp
Yaqin MS-20L integrated tube amp
SDA 2B TL's -
That's not a local hardware store. George and I already posted links to places to buy the screws.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
He said his local hardware stores were useless. I posted an alternative that helped me a lot restoring 60s vintage equipment.
Trying to be helpful. That ok??Post edited by odcics2 on -
I was going to suggest Sherwin-Williams but decided I had better call to make sure they had it in stock. I called and asked if they had black paint that would be good to use to paint the heads of screws. They told me the only way they could tell me for sure is if I could tell them the size of the screws. Go figure...Do you have advice on where to buy black paint?Post edited by TennMan on- SDA 2BTL · Sonicaps · Mills resistors · RDO-198s · New gaskets · H-nuts · Erse inductors · BH5 · Dynamat
- Crossover upgrades by westmassguy
- Marantz 1504 AVR (front speaker pre-outs to Adcom 555)
- Adcom GFA-555 amp · Upgrades & speaker protection added by OldmanSRS
- Pioneer DV-610AV DVD/CD player
- SDA CRS+ · Hidden away in the closet
- SDA 2BTL · Sonicaps · Mills resistors · RDO-198s · New gaskets · H-nuts · Erse inductors · BH5 · Dynamat
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That makes sense as black paint comes in different sizes.
Sal Palooza -
those do not look too bad, I've seen a lot worse. Clean them off with a wire brush.
Yes, this, and dry them with Bellybutton Lint.michaeljhsda2 wrote: »Naval jelly will remove the rust.
Yeah, I agree, even if they're rustier. As long as it's just surface rust and not full-on corroded, cleaning them and then coating with 3-in-1, chain & cable lube, or maybe even 2WD.
To me, that would be more enjoyable and less hassle than trying to find fasteners. Not to mention, keeps them original.
Timely note about Naval Jelly @michaeljhsda2 - I've got another project that I'm curious to try that on now. I think I once tried it years ago, though, and it didn't do anything for rust.
PS - I always read your name as MichaelJihad2. I'm sure MichaelJihad1 was taken.
I disabled signatures.
