Dear all,
I will soon be making a pair of speakers with the new MarkAudio A11MS drivers & id like to also make a pair of matching side surround speakers.
For many years, I have used M&K sound “tripole” surround speakers, these use a mid/tweeter on the front with 3” drivers on the sides firing fore (in phase) & aft (out of phase).
I’d really like to copy this design, I’ll probably use the same A11MS on the front & a smaller/cheaper model on the sides.
What model would you guys recommend to use on the sides & how would one wire these up ?
Many thanks guys
Jason
I will soon be making a pair of speakers with the new MarkAudio A11MS drivers & id like to also make a pair of matching side surround speakers.
For many years, I have used M&K sound “tripole” surround speakers, these use a mid/tweeter on the front with 3” drivers on the sides firing fore (in phase) & aft (out of phase).
I’d really like to copy this design, I’ll probably use the same A11MS on the front & a smaller/cheaper model on the sides.
What model would you guys recommend to use on the sides & how would one wire these up ?
Many thanks guys
Jason
Toole showed that the out-of-phase driver in a surround was no longer applicable once we entered the age where surround sound became digital.
dave
dave
Thanks Dave,
That’s interesting, I had wondered how they’d sound with the rear facing driver in phase with the rest.
Jason
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The out of phase speaker (a dipole) was intended to make the poor ProLogic surround channels have less locatbility. Now baked into the current HT surround sound.
Standards are now, i believe, designed for a monopole speaker in each surround position.
dave
Standards are now, i believe, designed for a monopole speaker in each surround position.
dave
I believe you are correct Dave, monopoles are suggested all round, I’d probably go that route if I were running surround backs but I only run side surrounds & having run the tripoles for a good few years, I find the front/rear facing drivers fill in nicely between the front/surrounds & to the rear, I’ll have to make some quick & dirty cabinets & experiment, all good fun.
It’s the wiring of the three drivers that I can’t get my head around.
It’s the wiring of the three drivers that I can’t get my head around.
The wiring should be pretty straightforward.
You'll have the 2-way system running between the terminals, and then you can wire the two other drivers in parallel or series with each other, also across the terminals. The one that's "in phase" will have + to + on the terminals, while the "out of phase" will be wired + to -.
By choosing whether to wire the drivers in series or parallel, you can pick their sensitivity with the usual implications on cabinet impedance.
Chris
You'll have the 2-way system running between the terminals, and then you can wire the two other drivers in parallel or series with each other, also across the terminals. The one that's "in phase" will have + to + on the terminals, while the "out of phase" will be wired + to -.
By choosing whether to wire the drivers in series or parallel, you can pick their sensitivity with the usual implications on cabinet impedance.
Chris
Thanks Chris,
I’m actually planning to run the front/main driver A11MS without a tweeter. (I realise I said “copy MK tripoles in 1st post)
The only xover I plan to have in the system will be active between my front pair of A11MS & my pair of bass arrays.
Many thanks
Jason
I’m actually planning to run the front/main driver A11MS without a tweeter. (I realise I said “copy MK tripoles in 1st post)
The only xover I plan to have in the system will be active between my front pair of A11MS & my pair of bass arrays.
Many thanks
Jason
I've done something like this to make a more diffuse set of main speakers.
I used MarkAudio A12P inboard, and A12PW on opposite sides of a sealed cabinet. A single tweeter is facing forward from the dipole null, and there's no true crossover.
Most of the sound comes from the wide open full ranger reflections, and the positively wired tweeter uses a cap at -3 db down at 20000 hertz, to fill in the most where theres the least treble, and fade to nothing by the time the side treble can be heard.
There's some bass left due to the 3db difference in A12 efficiency differences, and the dipole nature in the sealed cabinets seems to completely eliminate audible boxy colorations.
I too cross actively with distributed bass, using OB panels from another project.
This was an idea I chatted while stuck in the hospital, and did mostly as a lark. I had no idea it would sound like my best effort so far, and am wondering if I can make it look good, or redo the whole thing.
I think I guessed right about not flush mounting the side drivers, and get some diffraction help from the raised basket rims.
Wow, that sounds like a very imaginative project & great to hear it turned out well.
I ended up moving home & never got around to attempting some MarkAudio tripole surrounds, the A11MS are doing a good job by themselves to be honest.
I ended up moving home & never got around to attempting some MarkAudio tripole surrounds, the A11MS are doing a good job by themselves to be honest.