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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Installed Sound/Contracting => Topic started by: Tim Weaver on May 20, 2021, 03:54:03 PM

Title: Anybody used a motion sensor to turn powered speakers on/off?
Post by: Tim Weaver on May 20, 2021, 03:54:03 PM
I'm about to hang 2 K10's in a permanent install situation. This is a sunday school classroom, so used once a week but the teachers will come in and do planning, load the pro presenter, etc during the week.

The lights are on a motion sensor already. Has anyone used a similar system for powered speakers? This would be ideal in my case since the end users are not techs. They are volunteers. This would just turn the rig on when someone walks in and turn it off after, say 30 minutes or so. Would keep the hours down considerably, but would be completely transparent to the users.

What are your thoughts?
Title: Re: Anybody used a motion sensor to turn powered speakers on/off?
Post by: Tim Weaver on May 20, 2021, 04:30:13 PM
I guess "Occupancy Sensor" is the correct nomenclature. Looking to use this Leviton unit. It can switch 1000 watts and is rated for a 1/4hp motor so I think it should be fine for a pair of K10's.


https://www.leviton.com/en/products/odc0s-i1w
Title: Re: Anybody used a motion sensor to turn powered speakers on/off?
Post by: Lou Kohley on May 20, 2021, 05:01:02 PM
Don't the K10s have a standby mode? Where they turn on once they start getting audio.

LOU
Title: Re: Anybody used a motion sensor to turn powered speakers on/off?
Post by: Tim Weaver on May 20, 2021, 05:23:16 PM
Don't the K10s have a standby mode? Where they turn on once they start getting audio.

LOU


That's a very good question that I should probably find the answer for! lol.
Title: Re: Anybody used a motion sensor to turn powered speakers on/off?
Post by: Scott Holtzman on May 20, 2021, 06:21:21 PM

That's a very good question that I should probably find the answer for! lol.


They do have a terminal block for remote on off switch
Title: Re: Anybody used a motion sensor to turn powered speakers on/off?
Post by: Lou Kohley on May 20, 2021, 07:10:06 PM
To save trouble and future forum searchers reference

K series Manual
https://www.qsc.com/resource-files/productresources/spk/k/q_spk_k_usermanual.pdf

Page 14 says:

Standby
All K Series models are equipped with an automatic standby feature to conserve energy when the systems are not in use. If no signal is present on any input of a K Series system or the gain knob is turned to off for five minutes, the power amplifier will go into standby and the green STANDBY LED will illuminate. No other LEDs will illuminate when the unit is in standby; this includes both the Rear Power LED and the Front Power LED. In this mode, the amplifier will be powered down. A small amount of voltage will continue to flow from the AC power source into the power supply of the K Series power module. This voltage will keep the power supply and DSP “awake” to reduce turn on time when the system is brought out of standby. The power up time of the amplifier is negligibly small and is shorter than the latency of the DSP, so no signal will be cut off when the K Series system is brought out of standby. A K Series loudspeaker can also be brought out of standby manually by turning the power switch off and then back on.

Hopefully this will work for your application.

LOU