Heat doesn't seem to be a problem at all if you use a HPF.
Using a 12dB HPF at 90Hz I cannot get any of my exciters even lukewarm. Even at the party after blasting them what should be over their specified wattage for over 12 hours they where still same as ambient temperature.
I should measure the outputs of my amps and see what they are actually delivering, but seems you can push a lot more then spec if using a HPF.
Below the tectonic patent in the patent lists was this patent from 1966 !
All looks too familiar.
Pity it does not mention the domes on the coil area , except a thickening ?
NXT and tectonic just reinvented the wheel.
https://patents.google.com/patent/US3509290A/en?assignee=Tectonic+Audio+Labs,+Llc
Steve.
All looks too familiar.
Pity it does not mention the domes on the coil area , except a thickening ?
NXT and tectonic just reinvented the wheel.
https://patents.google.com/patent/US3509290A/en?assignee=Tectonic+Audio+Labs,+Llc
Steve.
Leob.
as I stated in this post , my exciters do not heat up with a proper XO in place.
as long as the panel is efficient enough, heavier panels will need a higher roll off.
heat is not a problem for a large full range EPS panel , but low frequency resonance is.
Fig 2 in the last patent I posted is one way of dealing with a resonance problem.
Leob.
When I get the graphite panels I will start off by listening to the panel as is ,to see how it sounds And measures.
And then go on from there, sanding if the surface needs it and then coating in pva ?
I always like to know how a new naked panel sounds just in case it sound OK ?
I like to take small steps ,and listen in between to the unaltered panel.
Must try and order today.
Steve.
When I get the graphite panels I will start off by listening to the panel as is ,to see how it sounds And measures.
And then go on from there, sanding if the surface needs it and then coating in pva ?
I always like to know how a new naked panel sounds just in case it sound OK ?
I like to take small steps ,and listen in between to the unaltered panel.
Must try and order today.
Steve.
So basically should be only over excursion to worry about then...but with a HPF it seems also pretty impossible without going really really far beyond spec. Have you managed to push any exciter too hard?
Leob.
Just placed the order, £22.66 for 7panels 😭😭😭😥 OH my wallet !!!
yes it is easy to heat up a 10watt exciter and destroy the coils on a heavy panel, such as 3mm ply when listening at loud volumes if you don't watch your cross over point.
I regularly check the temperature when playing heavy rock on these types of panels as the temperature can rise pretty quickly.
jazz not such a problem.
Steve.
Just placed the order, £22.66 for 7panels 😭😭😭😥 OH my wallet !!!
yes it is easy to heat up a 10watt exciter and destroy the coils on a heavy panel, such as 3mm ply when listening at loud volumes if you don't watch your cross over point.
I regularly check the temperature when playing heavy rock on these types of panels as the temperature can rise pretty quickly.
jazz not such a problem.
Steve.
Leob.
The proplex definitely needs a more powerful exciter, or maybe 4 10watt exciters for full range.
Steve.
The proplex definitely needs a more powerful exciter, or maybe 4 10watt exciters for full range.
Steve.
One thing I forgot to mention was that when I was recording the headphones 2, I was sitting in my chair 3m away, but I had to get up and check that I hadn't left my TLS full range ,as I was hearing a very wide and full range soundstage.
this reminded me of when I first started with my 7ft EPS panels.
it used to amaze me that if I turned the panels to face each other ,that the soundstage used to go way back and and out so that you could walk strait though it to the other side as it you were there .
And this has just this minute reminded me of the first time the podium 1s were shown at the UK audio show.
They picked up the panels and slowly turned them around while playing music ,with no major bad effects.
I used to think it was because the very large panels were cutting off half the room , like a wall ,so I used to compromise by only moving them in to cross just in front of my seating position.
But I'm still getting the same effect with the very small card panels.
G A Briggs of wharfedale fame, used to mount his 8inch midrange units in his huge corner speakers, firing upwards with no enclosure ,for the same effect..
this sounded fantastic for classical music, but for direct radiated sound such as electric guitars , it sounded like they were playing in the next room behind the speakers 😃
luckily dml radiates omnidirectional , so you are still getting the full frequency.
Just thought I would mention this before I forget it again.
Steve.
this reminded me of when I first started with my 7ft EPS panels.
it used to amaze me that if I turned the panels to face each other ,that the soundstage used to go way back and and out so that you could walk strait though it to the other side as it you were there .
And this has just this minute reminded me of the first time the podium 1s were shown at the UK audio show.
They picked up the panels and slowly turned them around while playing music ,with no major bad effects.
I used to think it was because the very large panels were cutting off half the room , like a wall ,so I used to compromise by only moving them in to cross just in front of my seating position.
But I'm still getting the same effect with the very small card panels.
G A Briggs of wharfedale fame, used to mount his 8inch midrange units in his huge corner speakers, firing upwards with no enclosure ,for the same effect..
this sounded fantastic for classical music, but for direct radiated sound such as electric guitars , it sounded like they were playing in the next room behind the speakers 😃
luckily dml radiates omnidirectional , so you are still getting the full frequency.
Just thought I would mention this before I forget it again.
Steve.
I found it really interesting experience with the PA setup using one stack in each corner when standing in the middle of the dancefloor, it felt much louder than otherwise compared to being close to one stack.
It would be expected when the sound diminishes less over distance, but is a wierd feeling when you experience it, like the speakers would be following you into the middle.
Also, the stereo image seemed audible even when on the side of the dancefloor, so instead of as usual when moving to the middle resulting in getting much better stereo image, instead the more noticeable effect was that the volume seemed to increase.
It would be expected when the sound diminishes less over distance, but is a wierd feeling when you experience it, like the speakers would be following you into the middle.
Also, the stereo image seemed audible even when on the side of the dancefloor, so instead of as usual when moving to the middle resulting in getting much better stereo image, instead the more noticeable effect was that the volume seemed to increase.
On my test panels, larger give less soundstage depth and less separation. I guess it's because large panel board the reflection.
Smaller size give more sense of dimension. When I listen close (1M), It's really holographic. Like a BIG AKG-K1000. The imaging becomes very subjective. But the headroom so big let you feel inside the soundstage. It's a very good experience especially play them low in mid-night.
Smaller size give more sense of dimension. When I listen close (1M), It's really holographic. Like a BIG AKG-K1000. The imaging becomes very subjective. But the headroom so big let you feel inside the soundstage. It's a very good experience especially play them low in mid-night.
Leob.
I know exactly what you mean,I have found you can stand next to the left of the left panel, and still hear the right panel perfectly still with the full soundstage as if you were standing next to the performing musicians.
There is literally nowhere in the room that you can stand , where you feel you are missing out on the full performance .
I also agree with hkguy6, the small panels do have a much deeper soundstage depth and space.
But what the small panels cannot do ,is the shear scale of the large panels, if you have ever listened to a set of drums played in a small room or venue ,it can be quite shocking, large EPS panels do this with ease, usually this real live sound just makes me laugh with joy.
I intend to have a mixture of my main large panels(not sure of the size yet) and small panels, so I can swap between them , depending on how I feel.
Steve.
I know exactly what you mean,I have found you can stand next to the left of the left panel, and still hear the right panel perfectly still with the full soundstage as if you were standing next to the performing musicians.
There is literally nowhere in the room that you can stand , where you feel you are missing out on the full performance .
I also agree with hkguy6, the small panels do have a much deeper soundstage depth and space.
But what the small panels cannot do ,is the shear scale of the large panels, if you have ever listened to a set of drums played in a small room or venue ,it can be quite shocking, large EPS panels do this with ease, usually this real live sound just makes me laugh with joy.
I intend to have a mixture of my main large panels(not sure of the size yet) and small panels, so I can swap between them , depending on how I feel.
Steve.
Steve.
Do you have a preferred aspect ratio for large or small panels ? And is the NXT exciter placement 4/9 Wide x 3/7 height ?
Thanks
Pete
Do you have a preferred aspect ratio for large or small panels ? And is the NXT exciter placement 4/9 Wide x 3/7 height ?
Thanks
Pete
Alaska 129.
This patent has been posted a few times, it is a bit wordy, but has a lot of useful information.
It's not an easy read but the information is there.
https://patents.google.com/patent/US7158647B2/en?assignee=New+Transducers+Ltd
Steve
This patent has been posted a few times, it is a bit wordy, but has a lot of useful information.
It's not an easy read but the information is there.
https://patents.google.com/patent/US7158647B2/en?assignee=New+Transducers+Ltd
Steve
I just let my wife listen to my headphone2 recording of the armed man on my headphones.
She was blown away with how the recording sounded.
She said it sounded fantastic, and she could actually hear the building it was recorded in, because of all the reverberation from the walls and ceiling.
She is now listening to the whole cd👍
Steve.
She was blown away with how the recording sounded.
She said it sounded fantastic, and she could actually hear the building it was recorded in, because of all the reverberation from the walls and ceiling.
She is now listening to the whole cd👍
Steve.
Hi all,
I recently received a pair of Dayton exciters, with the intent of building some DMLs with my partner and her daughters during the upcoming vacation time. Her teenage girls have shown to be surprisingly interested in the concept, so I'd really like to achieve a good result, and hopefully engender further interest in engineering concepts.
I've got a few options for panel material. I've read around 100 pages of this thread but my brain is now turning to mush. Given the following, what would you guys recommend?
Extruded polystyrene 150cm by 60cm, but only available in 3cm thickness (is this too thick?)
Acrylic 100cm by 50cm, 3mm thickness
PVC foam board cut to size, 3 or 5mm thickness
"Litewood" plywood cut to size, 3 to 15mm thickness (same density as poplar ply, which I can't find here)
I'd like to keep the total cost low, so foam board would be my last choice (it's strangely expensive here) unless its by far the best option sound-wise.
Thank you for any advice you can provide 🙂
I recently received a pair of Dayton exciters, with the intent of building some DMLs with my partner and her daughters during the upcoming vacation time. Her teenage girls have shown to be surprisingly interested in the concept, so I'd really like to achieve a good result, and hopefully engender further interest in engineering concepts.
I've got a few options for panel material. I've read around 100 pages of this thread but my brain is now turning to mush. Given the following, what would you guys recommend?
Extruded polystyrene 150cm by 60cm, but only available in 3cm thickness (is this too thick?)
Acrylic 100cm by 50cm, 3mm thickness
PVC foam board cut to size, 3 or 5mm thickness
"Litewood" plywood cut to size, 3 to 15mm thickness (same density as poplar ply, which I can't find here)
I'd like to keep the total cost low, so foam board would be my last choice (it's strangely expensive here) unless its by far the best option sound-wise.
Thank you for any advice you can provide 🙂
Hi DontHertzMe,
For beginner, my suggestion is EPS > Polywood > Canvas.
Especially if you don't have a woofer. EPS maybe the only choice to get good result at the first time. And it is not exciter picky. Just don't over 150g is all fine.
Start from middle size. Within 40 to 60cm is more easier to control the variable.
Enjoy your first success with your girl.
For beginner, my suggestion is EPS > Polywood > Canvas.
Especially if you don't have a woofer. EPS maybe the only choice to get good result at the first time. And it is not exciter picky. Just don't over 150g is all fine.
Start from middle size. Within 40 to 60cm is more easier to control the variable.
Enjoy your first success with your girl.