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The next project after the last one (Read 206006 times)
Donnie
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Re: The next project after the last one
Reply #450 - 03/24/26 at 19:25:15
 
Well it is time to put this latest project to bed.

My initial impressions of this project is that it isn't the best thing I've ever built. But I will give the drivers time to break in. I might also play around with differing amounts of damping material in the full range drivers' enclosure.

The sound is a little hollow sounding in the midrange, possibly a little adjustment to the crossovers are needed.

Here are some photos of said speakers.






I'm not disappointed but not raving about these yet.

Time will tell.

Have a great day you all!
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Owner of the infamous RED TORII and Dan the Redheaded Amp
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Donnie
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Re: The next project after the last one
Reply #451 - 03/24/26 at 19:47:50
 
For some reason the picture of the right speaker didn't come through.





And a classic.


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CAJames
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Re: The next project after the last one
Reply #452 - 03/25/26 at 01:25:14
 
Have you tried the speakers with the tweeters on the inside? Other than that I think they look great.
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[Volumio | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC
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Donnie
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Re: The next project after the last one
Reply #453 - 03/25/26 at 03:24:42
 
James,

No I haven't swapped them side for side yet, I shall in the morning.
My wife gets pretty irritated when I crank the music above 95 db in the evening.

But I did stumble into a very meaningful upgrade in my sound.

I was moping around cursing the very idea of these speakers or the ridiculous idea that I could even build speakers to begin with, when it occurred to me that my JRiver software has a equalizer inside of it.
A couple minutes of button pushing later, I had found the equalizer and had added a little "chest" that was missing from vocals.
Things are much much better now, enough so that I put away the lighter fluid that I was going to use to set them on fire.
Though sometimes a good sacrificial burning makes things right, tonight isn't going to be that night.
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Donnie
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Re: The next project after the last one
Reply #454 - 03/26/26 at 19:36:13
 
So when you build new speakers you need to build new speaker stands to go along with them.

I started cutting stuff out today trying to come up with a idea.
Slowly something is coming together. Shown is my rough idea, nothing glued together yet.
I will probably put the same cross pieces on the top sides also.
I'm trying to decide if I round edges, how to paint it, stuff like that.




There  sure is a lot of clutter in the background, mostly stuff to damp the insides of speakers.
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Donnie
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Re: The next project after the last one
Reply #455 - 03/31/26 at 03:02:23
 
I've spent the last few evenings listening to my new Isobaric speakers and am starting to get a handle on them.
First of all they are power hungry.
My 80 wpc Angela-Gilbert Yeung plays them well, my Torii surprisingly plays them well also.
The Torii's 25 watts are what the cattle guys I grew up with called "Heavy on the hoof". It punches all four woofers hard!
My ZKIT 60 plays them well, but without much headroom left in them.
My Ampapa el cheapo amp, with 120 watts, just ain't got the umph to push them at all. Sometimes you "gets whats you pays for."

I think that the reason that they are so amp sensitive is because they like, no, need to be pushed hard to sound really good. Like 90+db. Right on the edge of being too loud for even me.
Played at more sane levels they are OK, but loud makes them come alive.
The bass really shines at higher levels, so controlled.
The full range drivers that most of the signal are routed through are really pleasant to listen to. I bet that after the drivers and the crossover break in they will be even better.

So as of right now I'm going to say that these speakers are a success. I might in the future explore these waters again, there are some sonic plusses that I am intrigued by in this build.

I might try some different crossover stuff to see if I can get them to be a little more palatable at lower volumes. Perhaps some different bass drivers are needed.
But that is in the future, hopefully I have more chances to try "stuff" out.

You all have a great day!
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Donnie
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Re: The next project after the last one
Reply #456 - Today at 02:19:30
 
There I was, just minding my own business when my neighbor, my retirement investment guy, came poking around my garage to see what I was doing. He knew that I built speakers, so he asked about if I could look at his old college speakers.
He said that he had some old Advent speakers that the foam surrounds had rotted off of them. So I quickly looked online and saw that there were cheap  surround kits available and somewhat reluctantly said that I would look at them.

Well a couple days later he dropped them off. The Advent's turned out to actually be Infinity RS 4000's with both the bass and midrange drivers roached.

Another quick search turned up a surround kit for both drivers and they were summarily ordered.

I then took everything apart, pulled drivers and possibly the most chintzy crossover ever out of the most surprisingly stunning conditioned 40 year old speaker boxes in captivity.

I thought about replacing the crossover components with new stuff but decided that the speakers probably weren't worth the time and money to do that. It didn't look bad and I had put power to it before taking it apart to check if the drivers would move and everything seemed ok.

I did start modifying the boxes though, they were as stiff as Kleenex held together with toothpicks. A bit of MDF has been cut up, lots of 45 degree cuts made and glued inside of the boxes to make them as stiff as a honeymoon pecker!

I'm now in Purgatory waiting for UPS to deliver the surround repair kit.
The boxes will probably get about eleventy seven coats of wax or perhaps a ceramic coating over the next few days whilst waiting then we will see if my skill set includes installing new foam surrounds and center caps that don't have dents in them. Wish me luck!
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