2 x EL70 plus 2 x SDX7 = hard to beat combination

Hi Mark, great to see you here! Can you give us a rough estimate of the finished box sizes?

Hi Mike

Sure ask good questions!

Width 9" Depth 18.5" Height 34"

Floor standers with the horn port to the back. All the sound tailoring in the world should you car to move about a little here and a little there.

Mark

The SDX7 design would need to be corner loaded, correct?

These numbers are for wall floor junction or two reflections ( wall + floor ). If you go to a corner with a third reflection ( wall + wall + floor ) you can add another 3 db.

Mark

Care to post up the parameters for these horns? What are we talking about here TH designs? The simulated responses look pretty good if so.

Ricci said:

Care to post up the parameters for these horns? What are we talking about here TH designs? The simulated responses look pretty good if so.

Click to expand...

It's really a double tapered quarter wavelength resonator. A fancy name for a shape like two funnels spout to spout. If you balance everything out you get pretty good response. If you tap a second driver at the right place it works even better.

I'll post some thing tonight. Still have work to do.

Mark

Hi guys I'm still working to make a living this week and the project unfortunately has to go on the back burner until next week. Next week I'm in the shop all week and I will have time to get this up and running. Sorry for the long wait.

I've been working on the design all weekend along with some others. Will post pics and descriptions tonight.

Mark

Excellent Mark! I look forward to seeing the fruits of your labor soon! I've recently finished up an EL70 build myself. I'll post mine up a little later

Hi Steven

This design has been taking me a great deal of time. The horn section has been worked on for over 120 hrs to date. The fold is the hardest part with this unconventional shape. But I think I have licked it. Had a cold bug over the weekend and now I have a couple of days of work before I can put the finishing touches on the bass section. Once that is proven I will plunk in the EL70's I have no questions as to how they sound. Bare with me this will be a pretty good box.

Mark

Can't wait can't wait!!!
:yay2:

Mark,

Do you have any measurements of a completed system yet? Outdoor 2m GP?

Working on it. Been crazy busy in the real world trying to make a living. My daytime job alternates between fine cabinet making and general construction. More of the latter than the former as of late. What I want to do gets knocked out of the ball park all to often by the realities of being an evil genius ( LOL ) MONEY! If only I could figure how to mass produce the money all my problems would be solved! I think that may be a little on the illegal side of things though.

But I have some time this week to get things done. On the block is the bass section of this speaker. It is almost ready. Then there is a 4 driver EL70 Bi-Pole surround. After that there is a computer speaker system with 2 EL70 per cabinet in a 7 liter configuration plus a more or less conventional sub-woofer. So busy I am I am.

When I have something to post I will do so mucho pronto!

Mark

Keep us updated.

Not dead yet!

Bass section to be tested is going together today and I will be able to test something or the other tomorrow.

High section is a snap.

Mark

Well gents the tests on the concept design have passed with flying colors and this one is next batter up.

Problem is now I have to make a set for my Dad! See what happens when you let people listen to good sound. It is contagious!

The box will be a slimish tower design around 42 inches tall. The height is there so that when you sit down you have the fullrange drivers on axis with you ears. Makes for the best image presentation from the recordings.

Can't wait to put it through it's paces.

Mark