Full range driver & enclosure selection help

[planet10]

Originally Posted by CrookedChris

Ok, so where can I get plans for the Maeshowe?

I'm thinking Maeshowes w/ CHR-70s loaded against the front wall of our living room.

Contact me directly...

dave

[CrookedChris]

And now for something completely diferent...

Scott Do you have any thought of how the CHR-70 would perform in a BIB? I might just build one and find out because it looks so cheap and simple.

I'm leaning towards buying the CHR-70s because in all the reading I've done I can't seem to find any really good reasons to justify the higher cost of the EL70 or Fostex drivers.

[Scottmoose]

Should work fine.

As for the rest, it's not really a matter of justifying anything; they're different drivers, designed for subtly different purposes & offer different things, so YMMV as always. The EL has greater sensitivity than the CHR & a slightly different balance; in the Fostex drivers, efficiency is still higher & the balance is different again. And so on & so forth. You pick & choose what's right for your particular needs.

[CrookedChris]

Originally Posted by Scottmoose

As for the rest, it's not really a matter of justifying anything; they're different drivers, designed for subtly different purposes & offer different things, so YMMV as always. The EL has greater sensitivity than the CHR & a slightly different balance; in the Fostex drivers, efficiency is still higher & the balance is different again. And so on & so forth. You pick & choose what's right for your particular needs.

Fair enough. No easy answers here. As an engineer I want it to be cut and dry, good vs. bad. Obviously given we're talking about human perception it can't be that simple. This is going to be a long journey. I can already hear my wallet emptying and my wife groaning.

Well. I did the calcs for a CHR-70 based BIB and if I trim 0.8 inches off the calculated height I can get two cabs out one one 4x8 sheet. So I might just whip a pair of those together as my introduction to this hobby and to have something decent to run with my NAD.

In the mean time I'll definitely look more into the Maeshowe and Lotus and perhaps the Frugel-horn or whatever else pops up.

[Scottmoose]

You'll need the downward-firing variety of BIB if you're going to do what I think you are & have a 48in tall cabinet. Upward-firing won't couple to the room properly in a box that short.

[CrookedChris]

Originally Posted by Scottmoose

You'll need the downward-firing variety of BIB if you're going to do what I think you are & have a 48in tall cabinet. Upward-firing won't couple to the room properly in a box that short.

Scott, quit throwing my world into a tizzy.

I'm only really familiar with the design on the zillaspeak.com website which is upward firing and which is also where I got the spreadsheet for doing the dimensional calcs. What's the minimum height to couple with the room I described in my first post? Is it a function of room size and/or ceiling height? Can you point me in the direction of something downward firing or can I simply flip the upward design on it's head with some feet?

[Scottmoose]

Depends on how tall the ceiling is. For the rest, just flip the box inverted, add feet so the termius isn't shorted out, & move the driver to 0.416 line length rather than 0.217 so it's at a reasonable height above the deck.