Spedge,
I didn't say I can't tell the difference, and I hadn't stumbled across your recording in this sprawling thread. My third panel is done, glue dried overnight and tested it this morning. It sounds better than my second panel (mounted), was leaned against the first panel and I had it in mind that it is a few inches out from the second, and has panel one behind it. The bass is better; or at least, thicker. So I did the test of picking it up and moving it to the wall. It definitely does make a difference, but doesn't make it sound like speaker 2. Then I dismounted speaker 2 and put (unfinished) panel 4 behind it. Speaker 3 still sounds better to me, speaker 2 is a little punchier though and at about the same volume level. I don't think there is anything wrong with it, my guess is that they are two versions of the thruster exciter, the newer version that twists off the base sounds a little better. I'll confirm that by sundown as I have a final panel to build with the newer thruster version.
So yes, distance from the wall definitely made a difference in the test this morning, I will have to do some experimenting with damping once I get other factors under control and see if a little space is worth sacrificing.
Jmproject.
My point was that having the panel parallel to the wall is the problem.
Moving the panel forwards a few inches and still parallel to the wall is still the problem.
You can hold the panel on the wall and pull out one side of the panel only, you can then hear the difference without the parallel compression and cancellations.
If you hinged the side of the panel that will stay on the wall, you can fold them back if not using them, To save space.
How far you want to pull them out is up to you.
Steve.
My point was that having the panel parallel to the wall is the problem.
Moving the panel forwards a few inches and still parallel to the wall is still the problem.
You can hold the panel on the wall and pull out one side of the panel only, you can then hear the difference without the parallel compression and cancellations.
If you hinged the side of the panel that will stay on the wall, you can fold them back if not using them, To save space.
How far you want to pull them out is up to you.
Steve.
To get the most out of a DML's performance they need to be at least 2ft. away from the walls.
Exciters need to be in the exact same placement even as little as a inch off can change the way they sound.
There is some quality control with exciters same goes with cheap brands of drivers in which the specs vary from one another.
Yup there are two different types of exciters so they wont sound the same.
spedge said:
+1.1 and + 1.
The final speaker with newer style thruster is ready and it sounds as good as it's partner, so I have a functional pair. putting them on little stands on my desk at angles from the wall; yeah, phenomenal sound, huge bass, no sub support. they sound so good that I'm going to have to bring in my (unused) floor-standing Energy speakers and compare on the weekend; or at least soon, I'm really curious. have some ideas to angle them and bring out a little.
the longer term plan has always been to either use these, or build another set that I can move out into the room and listen from my recliner and even use for temp home theater in that position.
Yesterday I finished my 3rd DML sound panel. What I call a DML sound panel is basically a SINGLE panel with 2 exciters each used with separate left and right channels. Its like a sound bar or JMC sound board.
This single panel sounds phenomenal with the least amount of room reflections since placement is in the middle. I am beginning to like this single (stereo) panel sound. Sure it wont have that wide soundstage and or imaging like 2 speakers but it just sounds so pleasing to listen to.
Also because the left and right channels are not the same signal it appears to have less cancellations/interference between the two exciters so it sounds more coherent then 2 exciters on the same panel used with one channel.
I initially made this for someone who wanted a sound bar. When I built my first one I made it exactly like the size of a sound bar which was to skinny and long so it did not sound right. lol Second try was too big but it sounded better then the skinny and long one. 3rd is not too skinny but not too long but just right.
As always here is a carpet sample of my DML SOUND PANEL. It sounds so good I give it the Kiss of life.
This single panel sounds phenomenal with the least amount of room reflections since placement is in the middle. I am beginning to like this single (stereo) panel sound. Sure it wont have that wide soundstage and or imaging like 2 speakers but it just sounds so pleasing to listen to.
Also because the left and right channels are not the same signal it appears to have less cancellations/interference between the two exciters so it sounds more coherent then 2 exciters on the same panel used with one channel.
I initially made this for someone who wanted a sound bar. When I built my first one I made it exactly like the size of a sound bar which was to skinny and long so it did not sound right. lol Second try was too big but it sounded better then the skinny and long one. 3rd is not too skinny but not too long but just right.
As always here is a carpet sample of my DML SOUND PANEL. It sounds so good I give it the Kiss of life.
Hello Audiofrenzy,Yesterday I finished my 3rd DML sound panel. What I call a DML sound panel is basically a SINGLE panel with 2 exciters each used with separate left and right channels. Its like a sound bar or JMC sound board.
This single panel sounds phenomenal with the least amount of room reflections since placement is in the middle. I am beginning to like this single (stereo) panel sound. Sure it wont have that wide soundstage and or imaging like 2 speakers but it just sounds so pleasing to listen to.
Also because the left and right channels are not the same signal it appears to have less cancellations/interference between the two exciters so it sounds more coherent then 2 exciters on the same panel used with one channel.
I initially made this for someone who wanted a sound bar. When I built my first one I made it exactly like the size of a sound bar which was to skinny and long so it did not sound right. lol Second try was too big but it sounded better then the skinny and long one. 3rd is not too skinny but not too long but just right.
As always here is a carpet sample of my DML SOUND PANEL. It sounds so good I give it the Kiss of life.
Good!
Is it possible to share some basic characteristics? Panel dimensions, material, exciter positions?
Thank you
Please. And exciter. What's the harm, I may go down this road for my RV.
Glad to hear you got good result, very convenient in some situations with a stereo plate!
I wouldn't jump to conclusions that a stereo signal means less issues with cancellation that quickly though. I really doubt it from a theoretical standpoint, and what you state would be very tricky to verify, both by listening tests and with measuring. Doing a non-blind listening test is not very conclusive to start with, and trying to subjectivly evaluate a mono signal compared to a stereo signal just doesn't work. They are very different perspectives and in most mixes even perception of things like loudness and frequency balance will be affected...and things like "coherency" very much so.
Hello Jm
From what I have seen , as the exciters are mainly 4 ohms, the question is lead by the resulting impedance for now.
2 exciters => series to get 8 ohms not 2 ohms
4 exciters => series by two and then parallel to get at the end 4 ohms.
There are now at Soundimports some dual exciter products which seem also in serie.
Some TV mounts can be used to mount speakers. These as a for instance. that I am using
https://www.amazon.co.uk/dp/B00QWPO2Q0?psc=1&ref=ppx_yo2ov_dt_b_product_details
They appear to be easily capable of carrying 10kg. The tension on the rotation isn't adjustable on mine, The other adjustments are including tilt.
Ajohnl.
If space is a problem hinges on one side could work well.
You already have the supports on the wall, why not use them ?
https://www.wickes.co.uk/Butt-Hinge-Steel-76mm---Pack-of-2/p/159714
Steve.
If space is a problem hinges on one side could work well.
You already have the supports on the wall, why not use them ?
https://www.wickes.co.uk/Butt-Hinge-Steel-76mm---Pack-of-2/p/159714
Steve.
I'm the one jumping to conclusions?
You havent even built one yet to even make a conclusion let alone refute someone elses conclusion. Nothing you said proves me wrong you are just speculating.Too much talk not enough walk.
There is not really anything to refute. You have provided zero details about your test apart from that you had plates with two exciters and with one unknown configuration with a mono signal compared to another unknown configuration with a stereo signal, and the conclusion was that the stereo signal sounded more "coherent". Just wanted to clarify to other readers that it is a useless statement to draw any kind of conclusions from. It just doesn't make sense. Stereo width is a big part of making a mix sound coherent.
Now, despite several requests from different users to provide details about the tests, you completely ignore those and instead focus on trying to turn it in to some kind of argument?
I'm not trying to prove you wrong and have personally no interest in building a single stereo plate. I'm just asking questions about your tests and conclusions since they make little sense to me. I'm sorry if that makes you feel defensive.
But I'm glad you like your plate, let's leave it there
Now, despite several requests from different users to provide details about the tests, you completely ignore those and instead focus on trying to turn it in to some kind of argument?
I'm not trying to prove you wrong and have personally no interest in building a single stereo plate. I'm just asking questions about your tests and conclusions since they make little sense to me. I'm sorry if that makes you feel defensive.
But I'm glad you like your plate, let's leave it there
So you wanted to clarify to others that my experience based conclusions is useless? Are you trying to discredit me because I dont approach things scientifically?
The only test I do is with my ears. What tests do you do to determine a good sounding DML panel? The only one arguing is you as you have nothing to back it up instead you just spew a bunch of nonsense and speculations based on nothing.
Like I said ALL TALK, NO WALK. If you had a legit rebuttal I wouldnt feel defensive at all. If yawl are so smart you should be able to accomplish it all on your own since some of you act like Gurus, you dont need my help.
As mentioned before the proof is in the pudding. I just modified my DML sound panel today. This design will be one of my keepers.
The only test I do is with my ears. What tests do you do to determine a good sounding DML panel?
The only one arguing is you as you have nothing to back it up instead you just spew a bunch of nonsense and speculations based on nothing.Like I said ALL TALK, NO WALK. If you had a legit rebuttal I wouldnt feel defensive at all. If yawl are so smart you should be able to accomplish it all on your own since some of you act like Gurus, you dont need my help.
As mentioned before the proof is in the pudding. I just modified my DML sound panel today. This design will be one of my keepers.