high effency speakers choices

[lbstyling]

hello all-
im looking to build a new project (done some 3 way seas excel speakers last year, but i crave a much more fast, attacking soundfor rock music, with a reasonable high output. i have room to house something like the troels gravesen dtqwt and i like the idea of these but i would like some advice from some experenced people!
what about a line array? whats a good proven design of this- and whats the pros/cons of this design-i know there high efficiancy-and have heard this may help in my design aims.
my rooms is about 400m3(high celing)

thanks peeps!

[Ziggy]

HORNS, HORNS, HORNS

[Richard Ellis]

There seems to be three classifications of drivers out there.
First off is the esoteric high definition types, your Seas' is a prime example accurate in the extreme, but it appears a sacrifice in SPL levels....The second what often is noted as The "Pro" series. These are used in the industry for sound reinforcements as in concerts, cinemas ..indoors and outdoors. While not usually as "accurate" they jump SPL levels to Appx. 98-102 DB. The Third is whats called "musical" drivers, they are used in guitar stacks, lead, bass and vocals. This class is the highest of all at 107Db and up. Unfortunatley they have a distinct 'sound' to them & this 'type' of sound is incorporated into the bands style of music.
So to summarize
1st. 82-94 Db
2nd. 94-102Db
3rd 102-? Db
What you want is the second class, loud but less "accurate".
The rub is to make this class the most accurate possible.
I would guess the line array that you note does not meet this criterion.
______________________________________Rick........

[Theo404]

Originally posted by Ziggy
HORNS, HORNS, HORNS

Second....

[adason]

I would guess the line array that you note does not meet this criterion.

why not? line arrays by design are high efficiency because they use multiple drivers and if they are composed of high quality drivers and well executed, they can be highly accurate

[Helmuth]

I design backloaded horns to.

You can visit fostex and copy a good design.

But the most simple way to get good low frequncy and flat response is a high spl bass reflex. I found a very good performing low priced chassis in the Monacor sph275c.

Two of those in a 65liter box. You get a 95dB/1wmtr !! straight to 50Hz. -6dB 41 Hz very good with such a small volume. I advise to combine it with a Eminence atp150 tested very good and cost extreme low use a lpad.


this design will cost about 300 euro on drivers 100 euro wood gleu and terminals and there you are 800 euro for a set high and high spl carbon cone loudspeakers.
These will look sexy to with a sturdy aluminium frame.

Vents round 10,2cm 14,1cm long

[tinitus]

Originally posted by lbstyling
hello all-
i have room to house something like the troels gravesen dtqwt and i like the idea of these but i would like some advice from some experenced people!

With Troels own words

"To my ears, this is the best speaker I have ever made"

Which ought to mean something

Btw, Gedlees designs seems to winn peoples harts, despite the quality issues

But I cant really suggest anything as I only know my own speakers
Thing is that if we were looking fore finished commercial speakers we wouldnt buy anything before listening...but in this DIY world we build before listening, mostly based on reputation and measurements, which present a problem as they all sound different, despite the good measurements
Just because I like a certain speaker doesnt mean you will like it too

[Richard Ellis]

Myself I was thinking of doing a tower at 48"H x 18"W x 22"D with a 15"W, 8"M, & horn atop.
The choices are http://www.parts-express.com/pe/show...number=264-338 for the woofer, http://www.parts-express.com/pe/show...number=294-652 for the midrange........still contemplating the large horn tweet.
As for line arrays the trouble as I see it, the multiple drivers at ultra high quality can add up expense very quickly.........up and out of sight. Adding up drivers doesn't make them more efficient......thay can play very loud but will suck up great sums of power to do so.
Note this image from Parts Express.com projects site, They say they will play very loud but are consuming some 1400 Watts.
____________________________________________Rick.. ......

[Helmuth]

Originally posted by Richard Ellis
Myself I was thinking of doing a tower at 48"H x 18"W x 22"D with a 15"W, 8"M, & horn atop.
The choices are http://www.parts-express.com/pe/show...number=264-338 for the woofer, http://www.parts-express.com/pe/show...number=294-652 for the midrange........still contemplating the large horn tweet.
As for line arrays the trouble as I see it, the multiple drivers at ultra high quality can add up expense very quickly.........up and out of sight. Adding up drivers doesn't make them more efficient......thay can play very loud but will suck up great sums of power to do so.
Note this image from Parts Express.com projects site, They say they will play very loud but are consuming some 1400 Watts.
____________________________________________Rick.. ......

use this one on top doesn't cost a ****. And good performance. filter the atp80 5kHz 1oct. And do not filter the midrange speaker and use its own Le to filter above 4khz see the spl grafic off the BC.

Will perform very good almost no filter components and fase shift

[RobWells]

If I was doing this as a first project I'd go for a pair of JBL 2226's per side topped with an Altec 511B horn (with decent Altec driver)

A pair of decent pro amps to power it all and it should sound very good and dynamic. (I'd use a DCX2496 as XO)

Rob.