BillFitzmaurice.info

Hi Dave Ok, so here's the rub. Why do all these folks spend so much time and money on programs like smaart to time align all the components of their sound system. It would be impossible to time align a system with the mains on either side of the stage and the subs over in the corner. In order to cor...

In order for 2 drivers to be properly time aligned through crossover, The two drivers must be less than 1/4 wavelength ( crossover freq) apart. Therefore aligning for smooth transition through crossover of Center clustered subs with flown or split tops is not likely. as an alternative, many choose t...

Personally I'd never own a powered mixer.

+1

Hal

Tim wrote: I seriously doubt the low pass filter would add clarity. I disagree, the low pass filter helps reduce the overlap in frequency reproduction between the woofer and the piezo's, thus reducing the time smear problems ( in theory ). Two sources producing the same frequency range at different ...

Tim

I forgot to ask. Did you use 1" open cell foam to line the interior of your DR200's or just Polyfil? The original plans said to use just polyfil but I believe the latest revision has switched to Open cell foam.

Bill could you comment?

Hal

Tim wrote:

The DR200's do have the low pass filter installed, but they don't use a throat filler, too small of an area to make a difference. The 250's do not have the mods.

This could certainly be a factor in explaining the perceived clarity difference in the DR200 and DR250.

Hal

So do most touring acts, though the FOH is generally 100 to 125 feet out and the room at least 5,000 seats. They use a lot more power, of course, to cover the area past the FOH, and they key to the success of line arrays is that most of that power goes over the heads of the first 30 rows. Agreed. Hal

bgavin wrote

Good gracious, that is about 139 dB at the source! Brutal loud.

This was a Classic Rock "Concert" in a small/medium sized room.

Most "A" level bar bands operate at 100 to 110db at mix position.

Hal

Tim And quite frankly, I never see myself using more than 4/side. That's a lot of juice and coverage, Bill rates that at 1,000 people, and we all know his estimates are conservative. I've been so busy I haven't even plugged the DR's in yet to see if they work! Since I will interpret that your answer...

Tim

Have you actually mixed a band on your DR200's yet? What dsp do you have?

Hal

Dave

This place MANUFACTURES's the bendable plywood:

Buffalo Veneer & plywood co

501 6th Ave NE
Buffalo, MN , 55313-1655
Phone: 763-682-1822
FAX: 763-682-0795

There is no website for some reason, but I'm sure they ship.

Hal

Dave et al This is the company that MANUFACTURE's the bendable Plywoood ( other plywood as well ) Buffalo Veneer & Plywood company 501 6th Ave NE Buffalo, MN , 55313-1655 Phone: 763-682-1822 FAX: 763-682-0795 For some reason they do not have a direct website. I was lucky. They are only a 20 minu...

I will try to do some measurements on crossfired vs straight arrays at 45 degrees when time permits.

Hal

Hello All I have just finished converting on of my DR200’s to be able to use it as either passive (original design), or active 2-way. In the active 2-way mode, the load for the piezo array is provided by one of these: http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=019-020 I have wired i...

Be careful boosting eq frequencies. You may be trying to correct an "un equalizable event" i.e. cancellation due to reflection.

Hal