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audiomagi
Premium
join:2000-08-28
North Las Vegas, NV

reply to Subaru

Re: 1500 W amp can power how many speakers?

Well, I would consider installing a low cut filter (a crossover would work fine) right before the power amp to filter out anything subsonic, and also probably anything below 40-50Hz anyway, especially if someone wants to be loud and you don't have subs...

Another thought....how about some fuses (or self-resetting circuit breakers) inline with either the speakers or the high drivers?

A third thought: how about a compressor configured as a brick wall limiter? (threshold +4, ratio infinity:1, attack as fast as it can be, and release times of +1 sec should work)

-Sam
--
"Say...There's a hoopy frood who really knows where his towel is."


Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT

I can do the crossover and the compressor I use that now but it's in a rack I mean if I really really need to I can pull it out just for a few hours..

I mean as you know people always help you setup but don't help bring back stuck.. Not like it's heavy or anything



audiomagi
Premium
join:2000-08-28
North Las Vegas, NV

Yeah, that's always the way it goes. Nobody wants to help at the end - or they insist in coiling my cables over their elbow. If you want max volume, with reduced risk of speaker damage, I would go ahead and use the crossover and comp. I would put the crossover before the comp, so that the bass that you filter won't trigger the compressor. This will result in a less-noticeable action on the part of the compressor, but will still provide the same protection. Outdoors is a hard thing to do from a sound standpoint, simply because you have no walls to help with reinforcement. If you could put the "stage" or whatever this event might have against a wall even the reflections off of it will help to create a bit more efficiency from your speakers. Also, If your area that you are trying to cover is longer than wide I would consider maybe placing two speakers near the front of the "stage" and then the other pair maybe 50' feet back from the first pair. Optimally in this situation, you would want to use a delay unit to delay the audio coming out of the 2nd pair of speakers. This is to preserve coherence in the area where the speakers' outputs overlap.

-Sam
--
"Say...There's a hoopy frood who really knows where his towel is."



Hall
Premium,MVM
join:2000-04-28
Dayton, OH
kudos:2

said by audiomagi:

or they insist in coiling my cables over their elbow.

Oooh, that annoys me too !!


audiomagi
Premium
join:2000-08-28
North Las Vegas, NV

Over and under all the way for me!

-Sam



Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT

reply to audiomagi
over and under is the only way to go!

You know what I'm going to take the compressor because I just remembered I have my settings saved in it.. it's a dbx drive rack PA


sk1939
Premium
join:2010-10-23
Washington, DC
kudos:9
Reviews:
·T-Mobile US

That's a nice compressor. You could always look into using a digital crossover at some point as well. You should be fine as long as you don't crank it, and watch the subsonic frequencies. Also, make sure your generator can handle at least a 1.8 kw load.



audiomagi
Premium
join:2000-08-28
North Las Vegas, NV

reply to Subaru
The driverack PA has crossover and delay functions....that will work well for you....does that one have a look-ahead setting for the limiter? Negative attack times on limiters are very handy.

-Sam
--
"Say...There's a hoopy frood who really knows where his towel is."



Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT

1 edit

said by audiomagi:

The driverack PA has crossover and delay functions....that will work well for you....does that one have a look-ahead setting for the limiter? Negative attack times on limiters are very handy.

-Sam

to be honest It's been a long time I'd have to check the manual matter of fact I'm looking on the website now for it.

I think it's under the delay settings?

this is from the pdf manual

The DriveRack® PA offers alignment delay to use for compensating signal delay that occurs due
to internal speaker components such as horns, speakers and subwoofers within speaker cabinets.
The alignment delay is also ideal to compensate for the difference in high and low frequency
speed.

The parameters for the alignment delay are as follows and are user adjustable:

Delay On/Off
Turns the Speaker Alignment delay on and off.

Units - Seconds, Feet or Meters

Selects the unit of measurement for the delay.

Length
Sets the amount of Speaker Alignment delay time. Delay times include: Seconds- 0.00-10.00 ms,
Feet- 0.00-11.3 and Meters - 0.00-3.43. Fine adjustments are made in 20uS increments. Coarse
adjustments are made in 21uS increments.


audiomagi
Premium
join:2000-08-28
North Las Vegas, NV

If I read your spec right it has a max of 11.3 feet...not quite the 50 or so feet....i'm not sure what good a delay position would do at only 11.3 feet back from the T-zero position. It sounds like that is a box delay meant for aligning speaker components.

-Sam
--
"Say...There's a hoopy frood who really knows where his towel is."



Subaru
1-3-2-4
Premium
join:2001-05-31
Greenwich, CT

Yeah I think that's what it is as well.


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