Hi, all. I see many familiar names from my last visits who are still posting. That is great to see!
Doubt anyone would remember my input from years past, but I always loved the lengthy and info rich conversations about the common elements we shared.

Since I'm not new, I won't bother with much profile introductory things, but my situation has changed dramatically.

I am now retired from work and we have bought a new home. I now have a small room to dedidicate to music appreciation.

I have been very satisfied with my two SE84Cs for many years!

Saw the thread about fuse rolling and realized I had missed a click or two in my absence.

I will need to upgrade my power cables soon, but not today.  [smiley=peanuts21.gif]


Still only 200 miles from Peoria.

DD- Welcome back sir. Sounds like some big big changes, I hope all goes smoothly. Please keep us posted on your progress with the room and the new house. Happy listening, Chris.

I'm still enamored with my own creation, open box design. I've tweeked it a bunch, but I have two 15" modified JBL 2235 on each side, angled at seven degrees  back.

Then, I keep coming back to the Visiton driver, even though I have tried twelve others (all of which are sitting at attention in the attic, awaiting orders  ;) )  Resolution is hard to beat. I have it mounted with an additional  four degrees of back tilt.

A number of various uppers have been tried, including some upward and back facing. Not using tweets right now, but I kind of want to try them again once this room is sound diffused as bit more.

DD, glad to see you back posting and please continue!

Hello, DirtDawg
It sounds like very good news for you!
I wonder if some sort of doors could be placed in front of your windows and open when the windows are wanted.

I am glad you are back,  Brian

Spent half the day gathering together some of my crude, out of date measuring equipment to better determine (or possibly confuse me even more) the band of frequencies I need to control, including some contact microphones (acoustic instrument pick ups, although not calibrated for any kinf of scientific measuerments, they are very sensitive) I actually attached to the glass.

My research on our windows tells me they are not really glass, but a triple pane affair made of poly-some crappy long name plastic compound designed with aluminium in the panes, mainly to block heat transferrence. That felt really positive knowing that we have really awesome, modern windows throughout this house. The poly-messy-named "glass" still makes a boom at around 800 to 1200 hertz resonance when you just tap on them.  
That's an area of concern if the memory of having pitch imperfect ears and still instantly knowing how to find a problem frequency band on the EQ (from my sound reinforcement days) has any bearing, at this late date in my ''Hearing Career."

The actual hard surface reflections are still to be determined exactly, but the testing with frequency generator has only begun. I have a long way to go.
My wife just shakes her head and asks why I can't just enjoy My New Room. My explanation of how this is a part of my enjoyment just frustrates her more.


One thing I haven't talked about is that we have these high grade/high dollar blinds over all the windows in the house, which help quite a bit. They are painted solid wood slats two inches deep and about 3/16 inch thick. I am still hoping that there is a magic angle where the blinds take me part way to where I need to be. Only been listening in this room for three weeks now.

One thing I do not want to develop is an acoustic numbness that lowers my sensitivity to the point where I just get used to it all and don't try to help what needs help.

I have a challenge!!   But it is MY challenge. I have work to do.

Any ideas from any amaruer acousticians would be welcome.

Good advice, indeed! And I love the humor, because I tend to post too ''seriously" when I have a project going.

Also, don't get me wrong, I am no scientist, so I am not going to spend grant money or a lot of my time coming up with THE  right way to do all this. I just want to not waste too much effort going the 'Wrong Way"  toward my goal.

Also, keeping the wife as disinterested as possible for as long as possible is one of my short term goals.


There is so much nonsense out there on the 'net with some guys just trying to sell us stuff, others just trying to impress people with thier math skills and most just talking out thier back chutes, echoing something they read somewhere and haven't tried.

The main reason I came back to this Glory Well of like minders is to help me sift through most of that BS.

Enjoy your day Andrew77.

"Oriental style tri-fold free standing room dividers for each big window collage."

I like the sound of that.
I don't know anything about 'Prime 7 diffusion', but the tri-fold panel seems like the right approach.

Brian

I've got a friend with glass on three sides of his room. 6' panels with maybe 4" frames between each panel. It really pisses me off he doesn't have any reflection issues. The ceiling is vaulted, maybe a 18-20' peak. I honestly think the ceiling saves it. Could it be the sound IS bouncing off the glass, but the second bounce is far enough away (ceiling) it's not heard?

How tall is your ceiling? I've got the 8' in my basement and a 18' in the living room. Living room sounds great, but I'm exiled to the basement. I've been experimenting with 3" insulation batts on the ceiling. A real pain, but I've had positive results...and some not so positive.

This may be of interest if you decide to build a diffuser, uses less material and weighs less. Or just plywood the walls like he did!  :D
https://www.youtube.com/watch?v=8YwZqcN1c4s

BTW, I've seen that John Heisz guy before. I think he built a tool cabinet that I thought looked cool.

Did not know he was into sound and related acoustics, though. Awesome!

His drilled boards are another direction of learning for me at this stage. I've seen a lot of computer designed diffusion out there.
My first thought was, if these are so great and they work so well and they are so easy to make, then why doesn't someone with a few CNC routers offer the panels at a decent price somewhere?

I know there is a lot of science behind this Digital amplitude stuff, but couldn't someone find the math to make the pattern resemble a twisted rope with a Celtic knot in it or something more artistic?

That room is designed for headphones, IMHO.

HK

"That room is designed for headphones, IMHO."

I've been using headphones for too long. Time for me to hear some "air."

Brian, in keeping with this forum's early traditions, we are always glad to share what we find along the way.
I am anxious to share, but at this point, I have more questions than answers. Sorry, but an in depth paper on using various primes to calculate a set of panels for a specific frequency range is beyond me.

Steve's vision here is larger than first glance at the site can reveal. This site he allows AND pays for is a treasure trove of very seldom found value.

If I was rich enough, I might just take one of everything offered and ask if he could bring it all today, get it going and show me how it all works.

Alas, I'm mostly broke after supporting two mortgages for so long, so I can't just buy all of Steve's efforts for a year or so any time soon.  [smiley=icqlite22.png]

I gained some perspective from others posting about my concerns who have shared that they have MORE windows and they are enjoying their rooms.

I remain, trying to find a way to  'get a grip'  as the saying goes.


Oh, my new Mantra: I am broke, but NOT broken!

Hey, Sean, I'm a DIY guy as well in most cases. No more plumbing, though!

I am very pleased with what I have in my room, except for a small band that is smeared sounding or there is no placement for that important band of frequencies. It is literally the same as the resonance of the windows when I tap on them.
800Hz to around 1200Hz. That means if a jazz singer or a French Horn are performing you can't find them.

The drapes do a lot for the upper frequencies flying around the room, as does the big thick rug. Even the thick blinds change things somewhat, depending on how they are set. But that particular range just plows through everything TWICE and pollutes what is otherwise half decent sound.
Thinking about it, I have a resonator in my room that is about a hundred times larger than my entire speaker system. Needs a bridle!

I'm still listening in my own room, so that's a win!

Other issue is that I love the light during the day. so I need to come up with away to NOT destroy the dual use aspect of what I have.

I'll build something, just not sure what just yet.

I have looked at products available at the stores we have near and thinking that these Wainscot panels, cut to size and assembled cleverly might just do a great deal (when re-imagined into a QRD panel) for my BIG drywall wall.

They are meant to go together by tongue and groove and the tongue is exactly one saw kerf. A panel with properly spaced saw kerfs, set apart just so could make a series of panels for the blank wall.

Still not turning on my saw, but looking at products available cheapish.
At $15 bucks for a bundle so four would make a 2x8 foot panel, but most of the sawing is done for you.

In the realm were we dwell, that might be a bargain, assuming a few hours (and hours and hours) of my donated labor.
Will need more wood, but maybe more to think about here.

My next work is going to be taking charge of the bare wall as the first step.

I seemed to have found that the big bump in the room is being contributed by the bare wall as much as the glass. I always knew I would need some diffusion up on that wall, but since the windows tend to "vibrate" about where the peaks are, I was maybe being foolish and I had not yet found all the sources of the problems.

Bare wall first, since we all know that a bare flat wall can't ever work well for a listening room.

I am going to address the largest unbroken plane first, including the angled ceiling, then re-assess.
Well, the floor, but I still want to walk on the floor, so deadening it is as far as I can go. I think I have done that fairly well with my half inch thick jute and wool Indian rug.

Has anyone looked into fractal geometry for constructing 3-dimensional diffusion panels. I can't find much out there in our audio related realm.

This might be too simplistic for many but this Danish guru has an easy panel design: http://www.troelsgravesen.dk/tips.htm#MY_DAMPING_PANELS

The prodigal Son has returned. Prepare the fatted calf!

Rivieraranch wrote on 03/24/22 at 16:51:42:


Sorry, but you lost me when you capitalized the word "son." I tend to hold such reverance for one specific entity. 
Oh, and we ate the calves we didn't raise to sell when I was young, so I'm there with you.
Not completely sure what you are trying to imply.
I will attempt grace.
So, hi, Rivieraranch!

I have read many of your posts and found valuable, even thought provoking insights.
If you have read any of mine, then you already know I am from a different world and this whole sitting around just listening concept is new to me, even still.
I am trying to do some of that and guidance would be appreciated.

What do you have to advise on this "NEW' room of mine?

Do you think this 705 stuff will do much or am I just blindly following the advise of another internet dude who just barely knows anything?

Hi, Hdrider,

I still have not received my 705 materials yet. Should be here by next Tuesday. If I had ordered a truckload of the stuff, I probably could have gotten it same day as ordering. I suppose that small orders are just an annoyance they try to deal with.

Arm is better. Hard cast is off and a removable type is to be used for the remainder of the healing process. Physical therapy to rebuild strength and dexterity has begun. Still hurts like the dickens if I move wrong, but pushing myself best I can. I have no strength in that hand; can't even lift a jug of milk, yet. Keep trying and fail. Getting better, though. Thanks for asking.

So far I have four cobbled together absorbers which I have moved around from Hell to breakfast and back to find the best placing. I'm kind of satisfied with what I have achieved so far.
My caveman era testing process shows up a little better, but the listening is much better.

I have also bought two cartons of that eggcrate looking polyfoam absorbing panels you see everywhere, but they only seem to deaden the upper highs, with no effect whatsoever to the worst peaks in the room.
Probably not going to use them after all. Wasted coin, I think. I don't have a problem at 8K or above after the drapes are covering the windows, blinds slanted upward and 2'x4' homemade panels were placed to benefit.

More to do, yet, but I am really enjoying what I have so far.

I brought my old McIntosh MC2500 in (well, my son did it - damn thing weighs over 100 pounds) and put it on the 15s and just power the Visatons with the two SE84Cs and wow! I have so much distinct bass with the beast showing about a watt on the meters at my normal listening level. No low level crossover or anything, but my 15s wind down about where the Visitons wind up. That's one of the reasons I have kept this OB system the way it is for so long. It Freeking works!

Might keep this going for a while. The sound is amazing. I go back to just the tubes running everything and the sound is amazing. Floating here! Still reaching for the best KISS (Keep It Simple, Stupid) principal set up.

well that didn't last long.

"I wonder how many of those "reviewers" ever hooked them up to mono'ed Decware amps."  

Yes, exactly! I expect doing their reviews only with solid state amps is why these revealing speakers gave them a "far too clinical, sterile or even castrated sound to enjoy listening to."

Glad you are getting such an enjoyable sound.
Brian

Yep, It's still me, the late DirtDawg.
Nope, Piezoman, I did not change my name and ditch. I was as surprised to see that as anyone could be. I wonder if that is some of Steve's cleverness or who ever else helps with his website.

Sorry, folks, but I was trying to update my profile info, since it is really out of date, had two tabs open side by side typed out everything, model numbers and all, one handed, then went to click out and hit enter and deleted myself.
Laugh all you want! Elbow nudging, accidentally mind you, and mice are hard to work with.


I had emailed Sarah about my idiocy, hoping there was an easy fix, but the note was headed to Steve. I am hoping I could get that stopped. No reason for Steve to get dirty wasting his time with my error.

Hey, Brian, thanks.
I've been messing around with the 705 stuff and, like Groovy said, he just piled the boxes and got groovier sound without doing much.

I took his idea and only partially cut a corner out or the boxes and forced the fiberglass into a curved surface, paper out, jutting from the cut corner of the box and now I'm a little groovier.

First I need to get all this extra gear, including three subwoofers in the way, out of here and just listen a bit, until I can make something more permanent.

Things already sound much better in this half glass room.

Donnie wrote on 04/10/22 at 00:37:18:


Donnie, I can't tell you why it hurts when you pee, but I can add that sometimes it hurts when you "click."

See my apologetic note above.