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theguitarfreak

Member Since 13 Feb 2014
Offline Last Active Mar 09 2014 12:29 AM
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Posts I've Made

In Topic: Upgrading to crown amps, help with choosing for my setup

09 March 2014 - 12:31 AM

View Postdakos, on 07 March 2014 - 08:48 PM, said:

View Posttheguitarfreak, on 07 March 2014 - 08:51 AM, said:

View Postdakos, on 27 February 2014 - 12:30 AM, said:

Added a comment about the headroom, was everything clear enough?
Avi

Thanks a lot Dakos. Its more or less clear. I have two systems in my company.  One indoor system where we use VRX and for outdoor shows we use DAS Aero 50. I ordered MA5000i for running the VRX. I will be running 2 VRX932LA coupled running at 4 ohms from one channel of MA5000i. I know the speakers need an rms power of 1600w at 4 ohm so ideally my amp should be 3200w per channel to provide peak headroom. But I think I will have to go with the 5000i which is 2500w per channel due to budget constraints. So going by this what do u think should be my rms and peak limiter settings on the amp so I get the max headroom without burning the coil.

Dear theguitarfreak,
The peak limiter for 1, 2, 3 ,4 or whatever number of speakers connected in parallel is the same, you saw the calculations we did for Peter so either choose the 131V or 113V, you'll have a bit better protection with the 113V.

As for RMS limiting and headroom, headroom is something you create by the way you configure your rig, the need for different headroom settings depends mostly on the type of music you play, so what type of music do you intend to play?
Avi

It will mostly be loud rock bands and DJ playing.

In Topic: Upgrading to crown amps, help with choosing for my setup

07 March 2014 - 08:51 AM

View Postdakos, on 27 February 2014 - 12:30 AM, said:

Added a comment about the headroom, was everything clear enough?
Avi

Thanks a lot Dakos. Its more or less clear. I have two systems in my company.  One indoor system where we use VRX and for outdoor shows we use DAS Aero 50. I ordered MA5000i for running the VRX. I will be running 2 VRX932LA coupled running at 4 ohms from one channel of MA5000i. I know the speakers need an rms power of 1600w at 4 ohm so ideally my amp should be 3200w per channel to provide peak headroom. But I think I will have to go with the 5000i which is 2500w per channel due to budget constraints. So going by this what do u think should be my rms and peak limiter settings on the amp so I get the max headroom without burning the coil.

In Topic: Upgrading to crown amps, help with choosing for my setup

20 February 2014 - 12:36 AM

View Postdakos, on 19 February 2014 - 11:34 PM, said:

View Posttheguitarfreak, on 13 February 2014 - 11:15 AM, said:

Hi i am currently planning to upgrade to Crown amps for the speaker setup that i have in my rental company. From what i understand power amp output rating should be 1.5 to 2 times that of the speaker's RMS rating. So going by that, this is the speaker viz a viz amp config i have made for my setup. Tell me if its alright or some things that i should consider.

1 JBL VRX932 1600W at 4ohms (2 cabs coupled) = 1 channel of XTi 6002 giving 2100W at 4 ohm (500W extra good enough?) or will a Macro Tech 5000i giving 2500W at 4 ohm be better?

1 JBL SR4733 1200W at 4ohms (1 cab) = 1 channel of XTi 6002 (900W extra good enough?)

1 JBL VRX932 800W at 8ohms (1 cab) = 1 channel of Xti 6002 giving 1200W at 8ohm?

We use XTA processors for the crossover points and other DSP but i can always bunk it and use the XTi's DSP if its good enough.

From what you write I feel you lack a bit of basic knowledge about amps and speakers so I would advise you to read this:
http://www.crownaudi...490
You are matching RMS speaker power to the amps power and that's not how you're supposed to do it!!

Now, for the second part of you question, the more AD/DA conversions you have going on in your rig, the sound coming out of them will sound like it was converted to mp3. The maximum number of conversions recommended are:
Maximum of 1 conversion at 48KHz.
Maximum of 2 conversions at 96KHz.
Maximum of 4 conversions at 192KHz.
Since you can't shut down the DSP on the XTi and both are working at 48KHz, you might as well use the one on the XTi and gain some free sound quality.
Avi

Thats clear a lot of things up as definition. Now if you could follow it up with an example, say powering a coupled VRX932 at 4 ohms with a few different wattage amps like xti 6002 or MA5000i, what would be the differences in terms of RMS, headroom and all that.