|
Post by xschop on Mar 21, 2021 21:34:06 GMT -5
I designed these for Sean's Monoliths and my 5Bs and 8TLs, as well as a set of 7Bs. Once I get 50 posts I'll put a for sale thread on the extras that I finished machining....
How do we post pics here?
|
|
|
Post by xschop on Mar 21, 2021 21:47:11 GMT -5
I designed these for Sean's Monoliths and my 5Bs and 8TLs, as well as a set of 7Bs. Once I get 50 posts I'll put a for sale thread on the extras that I finished machining.... How do we post pics here?
|
|
vmaxer
Administrator
Admin
Posts: 67
|
Post by vmaxer on Mar 21, 2021 21:54:39 GMT -5
Are you on mobile or desktop?
|
|
|
Post by xschop on Mar 21, 2021 22:07:03 GMT -5
Tried desktop version on mobile phone. Still no bueno. Oh well try again later on big computer. Like boomhauer on the nets lol.
|
|
vmaxer
Administrator
Admin
Posts: 67
|
Post by vmaxer on Mar 21, 2021 22:13:24 GMT -5
This is desktop on iPhone.
|
|
|
Post by xschop on Mar 22, 2021 4:38:49 GMT -5
|
|
|
Post by JayCee on Mar 22, 2021 13:36:27 GMT -5
Hey Rob. Finally got around to creating an account...thought I did when AM was created but apparently not. First post, longtime listener....
Trey's MW felts are out for delivery and I'm going to pop them in this afternoon. Expect they'll continue moving things in a positive direction.
Pretty sure you can put me down for a set of the backing rings. Can't remember price...looking for enough to do the 1.2's. Just to confirm, you're confident it is/will do the same as original rings re. torque but improve cabinet strength like the bezels; mo' better mids?
John
|
|
|
Post by xschop on Mar 22, 2021 14:24:53 GMT -5
I never had/held a set of original backing rings. These are 1/4" cold-rolled with integral 8-32 taps. These will allow more screw torque than hurricane nuts and provide much more rigidity to front baffle when installed. Don't know what the frequencies are exactly, but kick drums are clearly cleaned up and some low midrange as well. Don't judge but my favorite test track is by Cameo..."She's strange".
I think I have enough (32 each for you) and they are $16/pair, but I'll discount you as a repeat offender lol.
My email is robmott@cox.net or try the PM here. I'll be shipping Thursday
|
|
|
Post by JayCee on Mar 22, 2021 14:49:38 GMT -5
I'll test PM...incoming.
|
|
|
Post by xschop on Mar 22, 2021 18:35:40 GMT -5
FYI, I ran a thin bead of Powergrab across midline of the arch, stopping about 1/2" before the threaded taps. This allowed for plenty of adhesion while carefully locating and screwing the Midwoofers down. Worked a charm.
|
|
|
Post by JayCee on Mar 22, 2021 19:49:45 GMT -5
FYI, I ran a thin bead of Powergrab across midline of the arch, stopping about 1/2" before the threaded taps. This allowed for plenty of adhesion while carefully locating and screwing the Midwoofers down. Worked a charm. Copy, I have a tube in the basement waiting for a job.
|
|
|
Post by xschop on Mar 24, 2021 4:57:34 GMT -5
I only have 4 pair left on this run. PM if interested. Will be 4-6 weeks before I would start another batch of these.
|
|
|
Post by xschop on Mar 28, 2021 12:46:34 GMT -5
|
|
|
Post by xschop on Mar 28, 2021 14:01:18 GMT -5
Pre-wipe, clean with iso-alcohol or paint thinner, or acetone with a rag beforehand.
May I suggest black primer?
|
|
|
Post by JayCee on Mar 28, 2021 14:22:41 GMT -5
Pre-wipe, clean with iso-alcohol or paint thinner, or acetone with a rag beforehand. May I suggest black primer? LOL...saw this post after I pm'd you. Disregard PM if you see this first.
|
|
|
Post by xschop on Mar 28, 2021 14:32:00 GMT -5
Black primer is all you need... I installed a set bare and a set primered. I'll check them from time to time, but doubt any corrosion will appear anytime soon as the cutting oil I used lasts eons if not properly cleaned off with a solvent. Have you tried bending one by hand yet? photos.app.goo.gl/BW1z8s4qrtgTF3mS7
|
|
|
Post by JayCee on Mar 28, 2021 16:55:29 GMT -5
Have you tried bending one by hand yet? Yah, ain't no flex 'cept in my fingers. That's some heavy duty shite.
I still have the the gray etching primer I used on the tweet plates. Has a nice finish and sets pretty quick. Will have to wait to spray when the weather's a bit better.
|
|
|
Post by JayCee on Apr 3, 2021 16:29:00 GMT -5
Update....
ABSOLUTELY AGREE...drums, bass, etc are tighter after installing these new rings. Larry's are very good....these are very, very, very good.
Dirty details.......
Had to do some car battery maintenance and have leftover black primer that converts rust to a paintable surface. Liked the results and thought it would work w/the rings. Turned out great and will protect w/o final paint coat. Just insurance against future rust. I had Larry's rings installed, removed/will repurpose, and the original install required drilling holes for the posts. As a result, I have a wider passthrough to consider. As noted before, there's a bit of compression and a dip when max torque is applied so I came up with these to remedy the washer bow and also provide a solid surface for the screw/MW mating area. The nut I chose had compatible threads but I found screwing into them and then into the ring caused the rivet nut to mushroom from having two sets of threads. I used a drill bit and eliminated the threads on the rivet nut, effectively creating a riveted pass through.
Think I've all but eliminated it. Worked so well that I'd recommend doing this even if not retrofitting from the other style rings. Using a washer, mounting bolt and cordless drill w/clutch I was able to just countersink the rivet nut so it's flush with the cabinet when installing the rings. Also, Powergrabbed the rings as recommended. I made gaskets from Armaflex back in 2011ish when I installed the 198's and came across the template I created to cut them. I have no idea why I marked it L/R??? The MW gaskets are still original but almost look like glue on the MW basket....so compressed that they're part of it. In reference to your gasket thread, Rob, I wouldn't hesitate using Armaflex again. When I replaced the tweeter bezels a few weeks ago I noted the Armaflex was as pliable as 10 years ago and I have torqued them to bottoming out...ie., max compression. No doubt they are wafer thin using the new bezels and Larry's tweeter rings.
|
|
|
Post by xschop on Apr 3, 2021 19:24:33 GMT -5
Nice retro-mod. Maybe some wood filler putty would be a quick fix as well, but those look nuke-proof. Glad you're happy with the result. There is always room for improvement. I look forward to Spongebobs install as well in his new cabs.
|
|
|
Post by JayCee on Apr 3, 2021 21:48:05 GMT -5
Thanks. I also posted the same on CP. I know you've sworn CP off but just a heads-up 'cause it's probably going to get some attention. Already had 1 question.
|
|
|
Post by xschop on Apr 4, 2021 10:54:48 GMT -5
There's one last area of improvement for baffle stiffness in the Xover cover area on the 1.2's and SRS's. I consulted with VR3 on the design and I'm looking forward to him debuting them in the Monoliths as well.
Happy Easter to all.
|
|
|
Post by gardenstater on May 7, 2021 5:56:06 GMT -5
I'm working on installing mine in the 7B's today and pretty excited. I don't think it is necessary by any means, but since mine are the early 7B's and don't have a rabbet for the MW (or Passive), I'm grinding a 45deg bevel on the inside edge except for about 1.5" at the ends. Just my OCD and probably not needed. I think I'll cut off the extemporaneous tabs that protrude into the basket windows as well. I also made some square washers on my Taig Micro Lathe w/ Milling Attachment for between the screw heads and the basket frames. 1/8" thick steel and provides almost 3x the surface contact area which should allow significantly more torque to be applied. I don't really know if others would be interested in these. I'd do a run of 1,000 or so with black oxide coating if people are. Oh and almost forgot...I found some Grade 8 socket head button head black oxide screws 8-32 x 1-1/4" long that should work nicely.
|
|
|
Post by gardenstater on May 9, 2021 7:25:40 GMT -5
I did the R speaker yesterday and will do L today. I oriented them horizontally and JB Weld epoxy was used so these are permanent lol. I threw caution to the wind and didn't paint them ha ha. It's always a little weird when you do a mod to one side and it sounds unbalanced afterwards, but informative nonetheless. This is somewhere between subtle and huge but the R is noticeably cleaner, leaner, and more impactful. When I place my fingertips lightly on the baffle between the MW and the Passive, there is noticeably less vibration on the R vs L. My square washers worked nicely and I would recommend this for sure. Even with the square washers, you can still torque the screws to the point where there is less compression of gasket at midpoint between screws which is the worse case location, so there is no doubt that limiting factor is the stiffness of the basket flange. At least the basket flange is not distorted under the heads of the screw heads this way, or so I believe. 4 more screw locations would be awesome. I notched out Trey's wool felt anti-diffraction rings for the washers/button heads. Anyways, I love it when a plan comes together! Thanks Rob! Recommended mod.
|
|
|
Post by gardenstater on May 9, 2021 18:38:59 GMT -5
|
|
|
Post by xschop on May 11, 2021 16:10:29 GMT -5
Man, those 7s are looking nicely modded too. Glad your non-rabbeted 7s have seen the improvement as well. Phase plugs will be on their way soon. Been major busy with some other projects.
|
|
|
Post by gardenstater on May 17, 2021 18:47:39 GMT -5
Try listening to Peter Gabriel "Mercy Street" on the album So. I'm not exactly certain that it is entirely due to the midwoofer backer rings but where previously distinguishing the two voices was sometimes subtle, it now is clear as day. Pretty incredible. Part of it may be due to the anti-diffraction wool and the Edge Diffraction Treatments I'm working on but this is quite amazing, the transformation. Bass on this whole album is in another league now and I'm certain that is from the rings. Everything is so much more enjoyable to listen to.
|
|
|
Post by xschop on May 22, 2021 19:24:15 GMT -5
Nice. I believe the midbass response is more articulate as well. Was listening to Lee Ritenour and his guitar comes across more accurate in the lower notes than before the swap.
I wonder if the later rabbeted 7's baffles are a denser particle board?
You have a PM too...
|
|
|
Post by xschop on Jun 24, 2021 7:46:42 GMT -5
Does anyone know if the Polk 2.3's had different densities of particle board/MDF between the years/models like the 1.2's?
|
|