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-   -   Speaker Re-Foaming (http://forums.pelicanparts.com/off-topic-discussions/1158140-speaker-re-foaming.html)

herr_oberst 03-11-2024 10:38 AM

That rug really brings the room together. Also, that is an impressive set of Dynaudio speakers.

herr_oberst 03-11-2024 12:26 PM

So, aschen, now that you have the Parts Express speakers done and dusted, the Googleverse has oodles of sites that show plans and how-tos for building your own LaScala clones! Are you up for the challenge? Will you bring us along on the build?

aschen 03-11-2024 12:43 PM

Thanks I think that is the first compliment I have ever received on an interior design choice in my life!


At the risk of having things thrown at me LaScala's would not be my first choice. Now JBL M2 Clones I could see myself doing......I'm sure y'all would get pics weather you liked it or not :) . I think there are clone plans and guilines for alot of commercial and hobbyist designs. DIY audio really is a cool and active hobby if you have time and inclination. Slapping together a Parts express kit is kinda like the Porsche 924 of the hobby though

herr_oberst 03-12-2024 05:17 AM

Apparently all DIY if the description is to be believed. I'd love to hear this IRL

<iframe width="560" height="315" src="https://www.youtube.com/embed/N532BmUIN_Q?si=3mxS3UDGYUQZvUjA" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

stevej37 03-12-2024 07:31 AM

I first bought this disc in the early 80's as a LaserDisc, then a DVD, then a BluRay.
It's a great disc for testing out your home theater system.

http://forums.pelicanparts.com/uploa...1710257484.jpg

stevej37 03-12-2024 02:01 PM

I made a change in my sub hook-up. I deleted the LFE cable between the amp and the sub. I then connected the amps front speakers outputs to the two rca jack line inputs on the sub.

Now I have low end bass for all cable channels and streaming. I like it. :)

herr_oberst 03-12-2024 07:21 PM

Quote:

Originally Posted by stevej37 (Post 12211850)
I made a change in my sub hook-up. I deleted the LFE cable between the amp and the sub. I then connected the amps front speakers outputs to the two rca jack line inputs on the sub.

Now I have low end bass for all cable channels and streaming. I like it. :)

I've done the same, and I'd like to try putting the main speakers in series to the sub, but the sub is behind the couch and the cables needed to go to the mains would be about 15-18 feet long, or more; those would cost about 150 bucks from Blue Jeans Cable to do it right, and I'm not sure if I'd notice any difference. Maybe I can borrow some cables to try it some day.

stevej37 03-13-2024 06:24 AM

^^^
Instead of joining the 'front speaker outs' on the back of the amp...I decided to do it at the back of the two front speakers. I managed to squeeze two wires on each of the connectors I just bought (post#73) It was tight, but the set screw holds them firmly.

First thing I noticed after using it this way....the sub gain control was way too high. I've got it down to about 2.5 now.

herr_oberst 03-13-2024 07:20 AM

I did it differently. I connected the "B speaker" out to the amp of the subwoofer. Then I completely turned off the subwoofer in the surround chain on the amp. It uses up a speaker output, but I mostly listen to music from the sweet spot of my couch anyway, and always in stereo, so ultra-theatre sound isn't an issue for me. I can still get acceptable theatre sound for movies by turning on the center channel and the two surround speakers also behind the couch.

Someday I may return to days of yore and simple when I just had a stereo amp and two speakers.

(My amp is a 7.1 Pioneer Elite that has plenty of options. Too many, if I'm honest. I sometimes forget to flip a switch or return to the correct mode and have to stop everything and figure out what needs what, but that's a different problem)

Scott Douglas 03-13-2024 08:29 AM

You guys would really get a kick out of what I use for speaker cables.

stevej37 03-13-2024 10:13 AM

Quote:

Originally Posted by Scott Douglas (Post 12212247)
You guys would really get a kick out of what I use for speaker cables.


Car jumper cables? :D

Rusty Heap 03-13-2024 10:15 AM

Quote:

Originally Posted by Scott Douglas (Post 12212247)
You guys would really get a kick out of what I use for speaker cables.


http://forums.pelicanparts.com/uploa...1710353709.png


:rolleyes:

Scott Douglas 03-13-2024 10:23 AM

Both you guys are close, but no, not quite that bad.

Rusty Heap 03-13-2024 10:32 AM

All this talk about speaker cones had me track down a rattle in one of my Klipsch 21 year old drivers.

10" woofer from a KLF 10 which have 4 of them.

found a crack in the graphite grid of the cone from surround to center.

Center cap was loose too with poor adhesion.


Total speaker is replaceable as a "clone" but not the real thing.

Wonder what flexible adhesive would work to fix the crack and glue the cone back on?

I'd REALLY like to save this driver. Only rattles during deeeep bass.

thoughts from the Audio Brain Trust?




http://forums.pelicanparts.com/uploa...1710354389.jpg

Scott Douglas 03-13-2024 10:41 AM

If it's graphite I wouldn't think you'd put anything that is going to be or remain flexible on it to fix it. The whole idea is the cone moves as one to make the sound.
I'd give super glue a go if it were mine.
The center cap is actually a dust cover helping to protect the voice coil.

Rusty Heap 03-13-2024 10:46 AM

Looks like Loctite 380 is a rubberized instant glue. Apply a small bead with a toothpick starting on the backside, then front........

https://www.eis-inc.com/product/instant-adhesive-ph11-loc-380?option=LOC38004

Rusty Heap 03-13-2024 10:58 AM

https://inosaki.com/product/loctite-38048042104212/

stevej37 03-13-2024 11:00 AM

Can you get at the backside to glue it?

Would it affect the sound if a half inch width of similar material was glued from the front, the length of the crack?

908/930 03-13-2024 11:31 AM

I would epoxy an oval carbon or kevlar patch over that crack, from behind the cone. Thin material like 2oz should work and about 1" wide, use the least amount of epoxy you can get away with.

herr_oberst 03-13-2024 12:59 PM

Quote:

Originally Posted by Rusty Heap (Post 12212341)
Looks like Loctite 380 is a rubberized instant glue. Apply a small bead with a toothpick starting on the backside, then front........

https://www.eis-inc.com/product/instant-adhesive-ph11-loc-380?option=LOC38004

This is exactly how I'd fix it. The rubberized element is key. The smallest amount needed to bridge the gap. I'd also use a small artists paintbrush to clean inside the crack with denatured alcohol. Oh, and I'd carefully drill a small hole where the crack terminates to keep the crack from spreading all the way to the dust cone.

If the LocTite 380 is thin and runny, use blue masking tape to on the opposite side of the crack to keep the glue in place while it dries.

Think it through, figure out your moves, take your time. That's my free advice.

Ayles 03-13-2024 01:14 PM

Maybe some West Systems G-Flex would work as well.

Its a 1:1 epoxy making it super easy to use.

https://www.westmarine.com/west-system-g-flex-650-8-liquid-epoxy-resin-and-hardener-9223132.html?&adlclid=f5de3e41a1d611976b3b5bb3b701 fab4&utm_medium=cpc&utm_source=bing&utm_campaign=% 5BADL%5D%5BPLA%5D%20All%20Categories&utm_content=p la-4577198194756147x1177578694761653x458244127&msclki d=f5de3e41a1d611976b3b5bb3b701fab4&utm_term=457719 8194756147

Scott Douglas 03-13-2024 02:03 PM

Regardless which method is used to fix the crack, I think it's important to look at why it cracked in the first place.
From my experience, graphite is pretty tough stuff to a point.
I think the cone may have been bonded to the surround in a non-stress free state, ie it was forced into compliance at that interface, putting it under stress it shouldn't have been under.
I would fix the crack using as little 'glue' as necessary to bond the edges of the cone together in a stress free state as possible. To me that would mean just adding 'glue' to the crack without actually touching it, just let the 'glue' fill the crack as is. After it has set, I'd bond the cone to the voice coil if it's detached there at all, and let that cure. Then I'd move to the surround part and 'glue' the cone to it, again not touching it if possible, just 'bridging' the gap such as it is.

Rusty Heap 03-14-2024 07:59 AM

While they were the size of a refrigerator, with long ribbons and 4 woofers open firing both front/rear. They were inefficient as hellll and I was feeding them 1500 watts each with Carver PM 1.5's bridged mono. The sound stage was fantastic, transparent, and simply stellar

The Classic and Original Carver Amazing Loud Speakers.

https://www.audioresurgence.com/2014/05/gilmore-audio-and-carver-amazing-speakers.html

stevej37 03-18-2024 12:44 PM

My Sony amp has an 'on (tv) screen menu' to make nearly all the settings. Easy to find and work with.

Today, I was reading some of the paper manual that came with it and it mentioned there is also a set-up menu on the amp's front panel display. I had never looked at that part of the manual because the amp replaced another Sony amp that was identical except the old one was 7.1...this one is 5.1

Anyway, everything on the amp menu looked good until I came to 'speaker pattern'.
8 diff choices from 2.0 to 5.1......my setting was at 5.0 :eek: (prob factory setting)

Switched it to 5.1 and there was an immediate sound difference (for the good)

I should have read that section in the manual when I first set it up.....live and learn. :)

908/930 03-18-2024 01:07 PM

Read your post #83 where you say all 5.1 are working, lol. I really don't like AV receivers for that reason, lots of crap going on in the background. Good that you discovered it.

stevej37 03-18-2024 01:17 PM

^^^ They were all putting out sound....but it wasn't divvied out correctly by the amp.
Yeah..the layers of menu controls and adjustments give me a headache!
I didn't carefully go thru all the settings.:)

It's like reading the whole owners manual of a car...maybe worse. :D


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