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Author Topic: Speaker Management - setup within  (Read 2898 times)

Yoel Farkas

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Re: Speaker Management - setup within
« Reply #10 on: August 02, 2016, 02:31:43 pm »

There is also a separate mono output on the Expression.  I haven't played with it but there is both graphic and parametric available on all the outputs, as well as the matrix outputs Yoel refers to.

The path length for the tapped horns will be longer than the tops so you will probably need to delay the tops a bit. So the delay built into the Crown doesn't help although it could manage the LP/HP sub crossover functions.  Therefore you would need to run some arrangement of separate outputs on the Expression.  And then tweak both to do delay alignment to the backline.  Which sounds fussy to me.  Unless you want to do the aux fed sub thing, I would think a system DSP would be called for.
I'm doing the same thing, powered tops over passive subs.  I happened upon a Sabine (Xilica) processor used for a couple hundred which allowed me to retire my old BSS to back up duty.  You should be able to find something (not a DriveRack PA) decent used with a bit of looking and patience.
the active speaker has its build in crossover.
the subs, I-tech amps has crossovers as well
if you alignment i think the mixer could do that for you. and it is no need for outboard processing.

however, if you carry anyway a rack of amps it might be better to have an outboard DSP.
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Yoel Farkas
Expert Sound inc.
Monroe, NY, USA

Will Cash

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Re: Speaker Management - setup within
« Reply #11 on: August 02, 2016, 06:21:29 pm »

Is there anything particular I should look for in a power conditioner?
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Stephen Kirby

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Re: Speaker Management - setup within
« Reply #12 on: August 02, 2016, 06:51:05 pm »

Is there anything particular I should look for in a power conditioner?
Yes, don't bother with one.  Just about any consumer "power conditioner" won't filter any audio frequency noise in the line (from bad neon lights or funky dimmers) or pass enough current to be useful.

Good solid connections with commercial grade Edison outlets are key.  Anything else is superfluous. 

If you have line voltage issues there are autotap transformers but they won't handle high power amps.  They can keep an unregulated tube guitar amp or ancient analog mixer at the proper voltage, but if you're running TH118s off a suitable amp, they won't help.

Look up "Poor Man's Distro" and find an electrician to build you one.  Common solid ground is your first defense against noise.
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Mark Wilkinson

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Re: Speaker Management - setup within
« Reply #13 on: August 02, 2016, 08:28:22 pm »

the active speaker has its build in crossover.
the subs, I-tech amps has crossovers as well
if you alignment i think the mixer could do that for you. and it is no need for outboard processing.

however, if you carry anyway a rack of amps it might be better to have an outboard DSP.

Hi Yoel,
When i look at the specs on the RCF 4Pro 6001 mains, with their -3db @50hz,
I say no way can I align these to a horn loaded sub without traditional HP filters ..(and of course delay...)

I would need at least a 24db/oct, set of honest HP filters, that could slide between 50hz and 100hz, to have any chance of mating with either the OS or TH118 subs.
IMO, there is just too much overlap, subs to mains, with mains dropping down to 50hz, that can't be aligned across such a broad range.(This is assuming subs are being used for more than <50hz....)

Plus I'm asking the mains to do too much lifting at the lower end of their specs...
Gotta get x-over up to 80-100, ....depending on how low the mains can crank without cracking up....

If you can make a pseudo min 24db/oct x-over at whatever freq you want with just PEQs, GEQs, and shelving.....very, very cool !
Waay beyond anything I could try to dial in ...

Oh, all my previous comments were predicated on a quick look at the Soundcraft SI manual, that makes it look like the SI's don't have very robust HP filters on outputs....
maybe wrong here....


Best, Mark
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Yoel Farkas

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Re: Speaker Management - setup within
« Reply #14 on: August 02, 2016, 09:39:14 pm »

Hi Yoel,
When i look at the specs on the RCF 4Pro 6001 mains, with their -3db @50hz,
I say no way can I align these to a horn loaded sub without traditional HP filters ..(and of course delay...)

I would need at least a 24db/oct, set of honest HP filters, that could slide between 50hz and 100hz, to have any chance of mating with either the OS or TH118 subs.
IMO, there is just too much overlap, subs to mains, with mains dropping down to 50hz, that can't be aligned across such a broad range.(This is assuming subs are being used for more than <50hz....)

Plus I'm asking the mains to do too much lifting at the lower end of their specs...
Gotta get x-over up to 80-100, ....depending on how low the mains can crank without cracking up....

If you can make a pseudo min 24db/oct x-over at whatever freq you want with just PEQs, GEQs, and shelving.....very, very cool !
Waay beyond anything I could try to dial in ...

Oh, all my previous comments were predicated on a quick look at the Soundcraft SI manual, that makes it look like the SI's don't have very robust HP filters on outputs....
maybe wrong here....
Best, Mark
i totally agree with you.

However, i use all powered RCF and db tech systems. so i don't have amp racks (beside for my Danley system) i don't want to carry an outboard DSP. so i use the mixers LPF and HPF. but if you have amp racks Outboard DSP will provide more crossover options and more precise adjustments.

i just shared the way i'm doing it. 
« Last Edit: August 04, 2016, 12:05:39 pm by Yoel Farkas »
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Yoel Farkas
Expert Sound inc.
Monroe, NY, USA

ProSoundWeb Community

Re: Speaker Management - setup within
« Reply #14 on: August 02, 2016, 09:39:14 pm »


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