F1 front of house with L1 stage monitor

Portable PA
1

We will continue to use our L1 system with two B1 bass units behind us as a monitor system. For some very small venues this will be loud enough for the audience as well.

However, for larger Club and Theatre gigs we will have two F1s out front.

Is there likely to be any phasing problem because of the different distances of the F1s and L1 from the audience?

We will keep the volume of the L1 down to reduce the over spill to the audience.

2

Hi John,

Great question.

John Sparks posted:

We will continue to use our L1 system with two B1 bass units behind us as a monitor system. For some very small venues this will be loud enough for the audience as well.

However, for larger Club and Theatre gigs we will have two F1s out front.

Is there likely to be any phasing problem because of the different distances of the F1s and L1 from the audience?

The possibility exists and it's difficult to predict...



We will keep the volume of the L1 down to reduce the over spill to the audience.

but keeping the volume down will reduce the likelihood that you'll notice it. I'd be more concerned if you were running three identical L1®s (one behind and two out front).

ST

3
ST posted:

I'd be more concerned if you were running three identical L1®s (one behind and two out front).

ST

Why would this be a bigger concern vs the F1 up front?

John Lacson

4

Hi John,

The three L1®s are going to produce identical outputs and with a lot more overlap because of the wider horizontal dispersion. There's much more opportunity for  Multiple Source Interference.

Does that help?

ST

5

Ah! Ok, 3 mono outputs. My bad. I was wondering what the L1 model had to do with it.

6

We did once get a major cancellation when using two L1s as a standard up front PA.

We changed to the current setup partly as a result.

Thanks for the help.

John

7

For those reading along...

The minimum recommended distance when running dual mono (two L1®s running the same material) is 20 feet. For more detail, please follow the link below.

Stereo / Mono / Distributed Systems

example

T1® to two L1® Model IIs

ST

8
ST posted:

For those reading along...

The minimum recommended distance when running dual mono (two L1®s running the same material) is 20 feet. For more detail, please follow the link below.

Stereo / Mono / Distributed Systems

 

Hello ST I'm afraid that the link doesn't work for me - I get a 'request rejected' error message. 

9

Hi Bruno,

Here's the raw link. I just tried it. It's working from here.
http://toonz.ca/bose/wiki/inde..._Distributed_Systems

Please try again.

ST



PS - I just tested and the site is accessible from Dallas, Vancouver, Melbourne, San Jose, Stockholm. I don't have a way to test from Singapore.

10

Thanks ST it's working now. Guess it was just one of those temporary glitches

Bruno