Creative Sound Solutions

**mwmkravchenko** · **08-04-09, 05:19 PM**

I've been working on a semi full range combination of two EL70's plus some bass reinforcement with SDX7's. The EL70's are great but when you really want to crank it up as is concert level steroe or a great movie you need more help than the two EL70's.

So here is the start of the monster. SDX7's are flat to 30hz. Max SPL within excursion limits:

30 watts power input for all pics.

The EL70's will have their own sub enclosure. They will be an almost perfect match to the two SDX7's. So you get the sweet sound of a good full-range with the umph of a decent bass horn.

Will post pics as I have it built.

Mark

**Mike P.** · **08-04-09, 05:30 PM**

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

**mwmkravchenko** · **08-04-09, 05:55 PM**

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

**mwmkravchenko** · **08-04-09, 06:32 PM**

I was reading the SDX10 thread when I got to thinking how loud could the low end of this speaker go?
So a bit of fooling in the simulator and Voila:

150 watts input. So if you go Bi-amped this box can really rock.

Still within X-max. If you have a high pass filter you can even go a little louder than this. Not to bad for just under two cubic feet.

Mark

**Mike P.** · **08-04-09, 06:51 PM**

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

**mwmkravchenko** · **08-04-09, 06:58 PM**

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

**Ricci** · **08-05-09, 02:54 PM**

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.

**mwmkravchenko** · **08-05-09, 04:24 PM**

Quote:

Ricci wrote:

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.

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

**mwmkravchenko** · **08-05-09, 08:06 PM**

As promised the input screen from Hornresp.

If you have the program mess with it a bit. It really is quite interesting.

Here is one way it can look.

As for completion. I've drawn it out full scale but I have a client that wants something else done. SO first things first.

Mark

**mwmkravchenko** · **08-18-09, 08:19 PM**

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.

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