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[Keith Branagan]

Hello all, please excuse my question if you've answered it before (I have searched and found some really useful information) I currently run a single KF850e on top of 2 SB1000's per side. (Small narrow room)
subs: 2x Crown 5002, one channel per box
Lows: Crown 3600 one channel per box
Mids: crown 2400 one channel per box
High's: Crown 1202 one channel per box.
Am I correct in thinking that the amps do not have the same voltage gain therefore the processor settings online will need further adjustments after putting in the greybox settings?
Should I alter the band outputs (mids high's etc) in the 4800 to compensate for the different voltage gains?
Would altering the band outputs also alter the crossover points?
Any information would be really helpful, I just can't get my head around how to set the processor to replicate equal voltage gain in the amps.
Many thanks.

[Mac Kerr]

subs: 2x Crown 5002, one channel per box
Lows: Crown 3600 one channel per box
Mids: crown 2400 one channel per box
High's: Crown 1202 one channel per box.
Am I correct in thinking that the amps do not have the same voltage gain therefore the processor settings online will need further adjustments after putting in the greybox settings?
Should I alter the band outputs (mids high's etc) in the 4800 to compensate for the different voltage gains?
Would altering the band outputs also alter the crossover points?
Any information would be really helpful, I just can't get my head around how to set the processor to replicate equal voltage gain in the amps.
Many thanks.

If you put all the amps in the 26dB position on the sensitivity switch they will all have the same voltage gain (26dB). In the other positions they do not have the same gain.

Mac

[Keith Branagan]

If you put all the amps in the 26dB position on the sensitivity switch they will all have the same voltage gain (26dB). In the other positions they do not have the same gain.

Mac

Thanks Mac,

I did think about that, will the output level be lower than I'm used to if I do this?
I assume I would have to put in at lease x2 voltage to get the levels out that I'm used to or am I wrong?
Thanks again for you speedy answer.

Keith.

[David Sturzenbecher]

Hello all, please excuse my question if you've answered it before (I have searched and found some really useful information) I currently run a single KF850e on top of 2 SB1000's per side. (Small narrow room)
subs: 2x Crown 5002, one channel per box
Lows: Crown 3600 one channel per box
Mids: crown 2400 one channel per box
High's: Crown 1202 one channel per box.
Am I correct in thinking that the amps do not have the same voltage gain therefore the processor settings online will need further adjustments after putting in the greybox settings?
Should I alter the band outputs (mids high's etc) in the 4800 to compensate for the different voltage gains?
Would altering the band outputs also alter the crossover points?
Any information would be really helpful, I just can't get my head around how to set the processor to replicate equal voltage gain in the amps.
Many thanks.

How do you plan on putting EAW gray box settings in a dbx4800? 


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[Ivan Beaver]

How do you plan on putting EAW gray box settings in a dbx4800? 


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The same way you put a Ford engine program in a Chevy.  I don't see the issue   

[Ivan Beaver]

Thanks Mac,

I did think about that, will the output level be lower than I'm used to if I do this?
I assume I would have to put in at lease x2 voltage to get the levels out that I'm used to or am I wrong?
Thanks again for you speedy answer.

Keith.

Gain and max level are very different things.

There are a lot of "it depends" and "compared to what" involved in the "correct" answer.

[Keith Branagan]

How do you plan on putting EAW gray box settings in a dbx4800? 

Am I wrong in thinking that the processor settings found on the DBX website are based on the greybox settings? Those are the settings I'm using.
As far as gain/ level etc I mix at around 104dB at the desk with peaks of 110dB if I were to switch the amps to the 26dB setting would I have to put more into them to get the same reading at the desk?

Thanks for all the answers.

Keith.

[Ivan Beaver]

if I were to switch the amps to the 26dB setting would I have to put more into them to get the same reading at the desk?

Thanks for all the answers.

Keith.

It depends on what you are comparing that to.  You may or may not need to increase the drive level.

Of course, having a lower gain setting on the amps will give you a greater dynamic range to the system.

[David Sturzenbecher]

How do you plan on putting EAW gray box settings in a dbx4800? 

Am I wrong in thinking that the processor settings found on the DBX website are based on the greybox settings? Those are the settings I'm using.
As far as gain/ level etc I mix at around 104dB at the desk with peaks of 110dB if I were to switch the amps to the 26dB setting would I have to put more into them to get the same reading at the desk?

Thanks for all the answers.

Keith.

I only see EAW settings for the 480 not the 4800. So those won't work.  Additionally, the 4800 does not have FIR capabilities, which are the basis of the grey box magic.   While the 4800 is a really good processor, if you want grey box turnings (and you really do) then get an EAW processor.

[Ivan Beaver]

I only see EAW settings for the 480 not the 4800. So those won't work.  Additionally, the 4800 does not have FIR capabilities, which are the basis of the grey box magic.   While the 4800 is a really good processor, if you want grey box turnings (and you really do) then get an EAW processor.

And then he can simply (I assume) adjust the limiter thresholds to whatever amp gains he has.

A simple voltage measurement on the output of the amp will do the trick if there is no easy "conversion".

Simply turn the threshold up high, put a sine wave into the DSP somewhere around the middle of the particular passband.

DO NOT attach speakers!!!!!!!!!!!!!!!!!!!!

Turn up the input until the voltage is 10-20% (it really doesn't matter) higher than the desired limit voltage and then back down the limiter threshold until the voltage gets to the desired level.

If there are multiple limiters (peak-rems-heat etc) then start with the highest voltage one (peak) FIRST, and then work your way down.

Repeat on other passbands with different frequencies.

It should only take a couple of minutes at most.

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