SDA 1C's are ready for the upgrade bug

xsmi

Cool,

I am asking all of these questions so that hopefully I only have to open my SRS 2's one more time.

Toolfan66

xsmi wrote: »

Cool,

I am asking all of these questions so that hopefully I only have to open my SRS 2's one more time.

Ask away!!:cool: I just wish I could get at least 2 people to come over and hear them..

I also can't beleive I am putting $600 more into my 1.2tl's..:eek:

Face

I can help you spend even more...

Toolfan66

Face wrote: »

I can help you spend even more...

Well do tell I might just be up for it... LOL:eek:

Conradicles

The more time I spend with these, I find that the midrange on the SDA-1C is superb. I am really enjoying mine and they are not modded near to the level as yours are Larry.

geoff727

TOOLFORLIFEFAN wrote: »

Your more then welcome to come by, just keep in touch.

Thanks. I'm anxious to put my ears on them. When I modded Kelvin's -1C's a couple years ago, I used a very basic foam to cut down the internal enclosure reflections. I'm looking forward to hearing the improvement you've gained with the BlackHole/SonicBarrier combination.

Fongolio

geoff727 wrote: »

Thanks. I'm anxious to put my ears on them. When I modded Kelvin's -1C's a couple years ago, I used a very basic foam to cut down the internal enclosure reflections. I'm looking forward to hearing the improvement you've gained with the BlackHole/SonicBarrier combination.

Hmmmm, do I forsee a mod in my future?

geoff727

Fongolio wrote: »

Hmmmm, do I forsee a mod in my future?

Well, you could try, but it'll be a pain. I tacked that foam down with hot glue throughout the enclosure, with the idea that it never come loose. If I remember right, I stuffed about 70% of the enclosure volume with polyfill for internal reflection control. So taking the foam out and re-installing B.H. 5 or S.B. or NoRez would be a tremendous pain, and most likely for a small benefit at this point (with those particular speakers).

But, if you run across another pair of speakers you want me to do, then we could work something out!

geoff727

Fongolio wrote: »

Hmmmm, do I forsee a mod in my future?

Also remember that those -1C's have quite a few front-back and side-side dowels inside there to 'tighten up' the areas where there was a lot of unsupported baffle, or a typical weak area (like the area around the 4 mid-bass drivers. This pushes the various unwanted box vibrations to higher frequencies, where they're more easily controlled.

Any re-installation of another foam involves either removing all those supporting dowles, or cutting the foam to go around them. Removing them would be very unwise, as they're cemented in there really good. The area around the mid-basses where the particle board is not very substantial would probably break if you tried to remove those supports.

Sorry, this is Larry's thread. I'll shut up now.

misterrick

Hi all! I am new here. I think I am going to take all my mid/bass drivers and JB weld 'em just to be safe. Too much investment not to, I think. I have two Monitor 5's that had both drivers frozen up so I replaced them with eBay purchases. They work great now. I understand there is a place that can fix the frozen drivers but not cheap, around $130 - $150 a pair I think. I will have to look this up again. I can twist the magnet & outer plate by hand on the frozen up drivers, so it sounds like the "glue" gave out or none was used. I have collected many older Polk drivers and speakers to try to put together a nice sound system that can be voice matched, mostly older monitor 5's, 7's & RT-11t. I am using Hafler gear & am looking at upgrade kits for everything in hopes of improving what I have. Any helpful hints are welcome. Thanks all!

drumminman

misterrick wrote: »

Hi all! I am new here. I think I am going to take all my mid/bass drivers and JB weld 'em just to be safe. Too much investment not to, I think. I have two Monitor 5's that had both drivers frozen up so I replaced them with eBay purchases. They work great now. I understand there is a place that can fix the frozen drivers but not cheap, around $130 - $150 a pair I think. I will have to look this up again. I can twist the magnet & outer plate by hand on the frozen up drivers, so it sounds like the "glue" gave out or none was used. I have collected many older Polk drivers and speakers to try to put together a nice sound system that can be voice matched, mostly older monitor 5's, 7's & RT-11t. I am using Hafler gear & am looking at upgrade kits for everything in hopes of improving what I have. Any helpful hints are welcome. Thanks all!

Best advice to get help is to start a new thread - this one's 2+ years old!

Welcome to CP!

Toolfan66

The memories..

verb

Hi Toolfan. I just read through this 1C upgrade post - wow !!! Beautiful !!! I'm about to take a similar adventure. Starting with the endcaps, you mentioned that you re-attached them similar to the SRS's. I've read that they are bolt on, which I prefer, after struggling like you with the glued on ones. Can you provide more details as to how they are bolted on? Thanks !!!

verb

Side panels removed. 3 of the 4 came off easily, the 4th came off in pieces.

[Deleted User]

Might be Overkill but my little Artemes (so?) EOS cabinets are 5 layers of 3/4" and 5/8" MDF with a rolled on liquid Dynamat like material between each piece and internally braced for a single 7" Eton woofer. You can put your ear at the port and knock on the cabinet and hear nothing. Inside is just virgin lamb's wool. Bottom has an aluminum plate added for it to sit on the three steel balls sitting on the Sound Anchor stands. People that listen to them always look around for a subwoofer in the room. The low-end extension and overall output is amazing. Actually, the entire speaker and sound is amazing. Especially for a 7" two way. Expensive but worth every penny if you can find a pair.

Point is, cabinets can't be too solid. I think all the SDA's for sure could use another layer or two at least on the baffle. They have a lot of motors stressing that single layer of particle board. I've got a pair of 1C's I'm seriously thinking about building multi-layer MDF cabinets for just to get rid of the low budget OEM cabinets. I'll bet everything below around 4-5k hz would sound better. You guys with 1.2's or 2.3's with all those little woofers jumping around would definitely benefit from stronger enclosures.

verb

Thanks Slapaho. Whoa those EOS cabinets are real beauties. I do a little woodworking so I appreciate the design of anything that is not just orthogonal. I thought the SRS's had an optional brace that could be added? That being said, I would expect the speakers would be dialed in to accommodate the natural frequency of the cabinet or other steady state structure born vibration?

[Deleted User]

Polk came up with an external but it nothing to do with cabinet or baffle rigidity. It went between the back of the speaker and back wall so it wouldn't tip over as easily.