Acoustat two way esl panel

[pwgtang]

Any acoustat ower want to try this ?Rewire the panel to make it works as a two way panel.

[david yost]

I'm not sure what I am looking at. Could you please ID the rest of the components? I am assuming that the stator bias circuitry is stock?

Thanks,
David

[pwgtang]

Acoustat panel stator was used a pice of wire runs up and down
through the plastic frame.I am thinking of solder two wires on the panel center about two and half inches apart and connect to the
high frequency transformer output cap,so low frequency energy
will apply to the whole panel,but for HF energy only apply to the
center striped through the two add wires to make the panel works like a two way panel.Every thing was stock except add two wires and re-connect the two .01 6kv caps.

[david yost]

That is pretty much what I thought you were trying to do. Acoustat did much the same in the Spectra series, which IIRC was 3-way and going from a 3" or so tweeter strip to progressively wider mids and bass units.

Have you tried the scheme you have described?

[moray james]

if you want to do this you will need to divide the stator into two sections (you choose the ratio). One part of the stator will be driven by the bass transformer and one section will be driven by the treble transformer. You will get into issues if you try to drive the middle section of the panel with the treble transformer and either side with the bass transformer. The way to do this is to drive your tweeter strip on one side of the panel since you dont need much travel for high frequencies this way you save the part of the panel that has available travel for the bass transformer to drive. Remember also that both of these transformers have very wide bandwidth (they overlap by a fair amount). Good luck with the project, keep us posted.

[pforeman]

as you now have a significantly smaller area of the speaker reproducing high freq. wont the already down tilted sound have even less high freq output?

[moray james]

but if you look at a dynamic speaker with a one inch tweeter I think that you will see it's not a big deal. I have found that as soon as you run the secondary side of the two transformers in parallel (Acoustat Mk 121) you loose output. Run each secondary to its own panel and you get more. This goes against what I would think to be the intuitive but that is what I have found to be.

[pwgtang]

Hello,all
I had modify one 1+1 like this with very good result,the HF
was much detail and focus than other unmodified one.
You need to try to believe it.The stator wire and diaphragms act
like low pass filter.Most HF energy on the side of the panel

[pforeman]

If I have this right?
remove the wires from the harness coming from the speakers from about 3 inches of stators (inside) edge, connect them to the high freq. transformer. Leave in the caps.
Have the rest of of the stator wires in the harness connected to the bass transformer, leave in the resistors.
Is that it?
According to the schematic on my 2+2's, after the signal leaves the high freq transformer, it goes thru.1uF on the + and - sides.
and the signal goes thru resistors after the bass transformer.
Thanks

[planet10]

I can't remember exactly how i did it, but when i had my 1+1s i rewired it to drive the HF trafo with one amp & the LF with another. A big improvement in dynamics (i was using 2 NAIM 160)

dave