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Author Topic: Shure DFR22 in auditorium  (Read 4165 times)

Tom Bourke

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Shure DFR22 in auditorium
« on: June 22, 2004, 05:11:55 pm »

I am working on a new system for a 600 seat high school auditorium.  Basic use of the space is 3 theater/musical productions a year plus countless talking head at a lectern gigs.  I am planing on a center cluster of 3 with 2 delay cabinets (EV SX300 fit the room nicely), any sub will be off aux and on its own processing.

I will use one output on the DFR22 to drive the mains and one to drive the delay.  I am planing on one input being fed by a simple mic mixer hooked to the floor jacks.  The other input will come from the console I use for theater and music.  Any subs will run off aux and have there own processing.

My thinking is that I can put a push button back stage that will activate the sound system (power up, select preset 1 on the DFR22 via the contact inputs.) This would be for the custodians to use when I am not there for the simple gigs.  I would have other programs for when I had a show in progress and I could access the EQ and other goodies in real time using a laptop.  But the custodians could still use there button back stage and get a lectern mic working with out messing up my settings during the day time.  Also they would not have access to the mic mixer, that would just be there to combine the mic jacks in the floor that they use.  My idea for preset 1 is:
delay, limiting and EQ for the speakers, auto gain and/or compression of the mic feed, and the feedback eliminator with only the simple mixer input active.  The big mixer input would be muted.  Above all the system would be set very stable so feedback was not a concern in auto mode.

It is the contact closures and flexibility of this unit that attracted me.  Am I reading the specks right? or is there a better unit for what I want to do?  Those of you that have used it, how reliable is it?

Tom B
sound and lighting supervisor
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Michael 'Bink' Knowles

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Re: Shure DFR22 in auditorium
« Reply #1 on: June 22, 2004, 05:53:37 pm »

Yes, the DFR22 offers the flexibility you are looking for. You can buy a DSR10 or make your own switch to give the house a few options like straight playback on preset one, predetermined podium mic position on preset two and mobile vocal mic autofeedback reduction on preset three, etc. There are other pieces of gear that will do this job but the Shure is a fine choice.

Make sure to check on the power-off signal throughput characteristics. I don't think it will pass sound when there is no power applied, unlike the Sabine GRQ. The Shure DFR family has solid-state bypass, not relay bypass. Also, keep the DFR away from amplifiers, wireless and other pieces of gear with interfering fields.

Have fun -

-Bink
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Michael 'Bink' Knowles
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Tom Bourke

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Re: Shure DFR22 in auditorium
« Reply #2 on: June 22, 2004, 09:58:48 pm »

Bink wrote on Tue, 22 June 2004 16:53


Make sure to check on the power-off signal throughput characteristics. I don't think it will pass sound when there is no power applied, unlike the Sabine GRQ. The Shure DFR family has solid-state bypass, not relay bypass. Also, keep the DFR away from amplifiers, wireless and other pieces of gear with interfering fields.

Have fun -

-Bink


If it blocked audio with no power applied that would be good!  As for the rf field, does it have bad shielding?  The rack it would be mounted in is 6ft away from a 96 space strand CD80 dimmer rack and would be mounted with the amp (QSC PLX3402 or Crown K2 TBD) and mic mixer Possibly with WLS receivers above all that.  The rack is 5 ft tall so I can put in some space.

Tom B
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Michael 'Bink' Knowles

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Re: Shure DFR22 in auditorium
« Reply #3 on: June 23, 2004, 10:05:57 am »

Quote:

... As for the rf field, does it have bad shielding?  The rack it would be mounted in is 6ft away from a 96 space strand CD80 dimmer rack and would be mounted with the amp (QSC PLX3402 or Crown K2 TBD) and mic mixer Possibly with WLS receivers above all that.  The rack is 5 ft tall so I can put in some space.


Tom, I would say that the RF shielding is adequate and that Shure is erring on the side of caution. They recommend at least one rack space between the DFR and any amplifiers. I'm sure your dimmer rack is far enough away.

-Bink
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telejeff

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Re: Shure DFR22 in auditorium
« Reply #4 on: June 23, 2004, 08:32:40 pm »

That is an awesome setup, I could really use something like that in my space.  I use an XTA DP224, its pretty nice.  I've never had to make any major changes to it, the contractors did a great job.  I keep the thing locked up so idiots don't mess around with it.  But it sounds like you either hate your job, or your just sick of the work.  There countless wireless microphone/podium events, I wish I had this simplicity.  You'll like the Sx300s, I recently purchased two pairs for a portable system.
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Karl P(eterson)

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Re: Shure DFR22 in auditorium
« Reply #5 on: June 23, 2004, 10:32:37 pm »

[quote title=telejeff wrote on Wed, 23 June 2004 20:32]But it sounds like you either hate your job, or your just sick of the work.
Quote

Well, While I don't know what his motivation is behind the automixer setup, I doubt it is out of hate of the job. Generally speaking a lot of people hired full time to do audio visual for a campus (school, corporate, religious or other) have better and more pressing things to do than manage a talking head event where an automixer could do a fine job itself.

Karl P
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Tom Bourke

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Re: Shure DFR22 in auditorium
« Reply #6 on: June 24, 2004, 11:12:54 am »

telejeff wrote on Wed, 23 June 2004 19:32

That is an awesome setup, I could really use something like that in my space.  I use an XTA DP224, its pretty nice.  I've never had to make any major changes to it, the contractors did a great job.  I keep the thing locked up so idiots don't mess around with it.  But it sounds like you either hate your job, or your just sick of the work.  There countless wireless microphone/podium events, I wish I had this simplicity.  You'll like the Sx300s, I recently purchased two pairs for a portable system.


I love my job.  The auto mixer/one button sound system is for the events I am not brought in to do.  I am not there for lectures and such.  There are also the presentations I am not told about.  The big advantage I see is that the custodians will not have to go mess with my console.  Example of how they run sound:  person is coming in to speak so custodians go into the booth and push all the faders up!  Including the 2 house record mics that normally feed a tape recorder on a prefade aux.  I come in the next day to find the console like this and a complaint that the system makes lots of noise and hiss.

I cant stop them from using the system with out me so I am going to make it easy for them not to screw up.

There is also a choir teacher that likes to have some of the soloist rehearse with a mic.  She does not want to clime to the booth and turn on the system for one song.  I have set it up in the past where the system stays on for a few weeks before a show so she can just plug in a mic and go.

As for the 300's, that was an easy sell.  The school has a nice portable rig that uses them.  All I said is I want to use the same speakers in the auditorium.  I have used them many times before and I think the coverage and vocal projection will be great in my room.
Tom B
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telejeff

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Re: Shure DFR22 in auditorium
« Reply #7 on: June 25, 2004, 04:46:22 pm »

Just a little humor, but I completely agree with you.  I've had to miss class a few times because the orchestra conductor wanted effects during a rehersal.
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wesburgh

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Re: Shure DFR22 in auditorium
« Reply #8 on: August 04, 2004, 06:59:20 pm »

Look into RANE RPM, either the 22(two in and out), or 26(two in six out).  The DSP is more open than the Shure and it still has contact closure control.  They also have great single gang remote controls that have preset recall and volume via a rotary encoder.  Probably price comparable to the Shure.  The new software has great feedback reduction.
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