I am looking for guidance in selecting the correct parts for a small project. I would like to build a simple, wifi enabled speaker switch. I have a house with a "whole home audio system" with speakers in many areas. I run the home as a short term rental, and would like to be able to disable the speakers in certain areas remotely during certain windows of time (e.g. 10 PM to 10 AM) so my renters don't disturb the neighbors, blasting music at 3 am sort of thing.
My idea is to use a wifi smart switch (with a timer) to trigger the event. This will apply 110v to a contactor or relay (normally closed), and this will cut one of the speaker wires. Another more complex option is for the relay to reroute the speaker signal through a resistor, to cut the volume in 1/2.
My concern is in selecting the correct contactor / relay, because I would like to avoid any hum / feedback through the speaker when the 110 v is applied. Not sure if there is any shielding etc I need to consider.
For guidance, I am turning to the members of this forum, so any help would be appreciated.
My idea is to use a wifi smart switch (with a timer) to trigger the event. This will apply 110v to a contactor or relay (normally closed), and this will cut one of the speaker wires. Another more complex option is for the relay to reroute the speaker signal through a resistor, to cut the volume in 1/2.
My concern is in selecting the correct contactor / relay, because I would like to avoid any hum / feedback through the speaker when the 110 v is applied. Not sure if there is any shielding etc I need to consider.
For guidance, I am turning to the members of this forum, so any help would be appreciated.
Forgive my ignorance, but if I wanted to cut the volume in 1/2, by adding a resistor, is there a standard resistor I should use, or does it all depend on the output of the amp? Perhaps a potentiometer instead of a resistor, so I could adjust the desired volume instead of only have one fixed volume.
For 8 ohm speakers You would put another 8 Ohm in series, but it should have the same wattage as the speaker. Say a 20W speaker would use a 20W resistor. Now if we are talking about 70 or 100V speaker lines that's another story...
How are the speakers powered ? Passive or active ?
Passive connected in Parallel or in series ?
For active speakers there are remote switched plugs, some of them work of the internet perhaps or run a separate power wire to the plug & disconnect than one at a central point.
If passive in series if You disconnect one & the others don't work.
I would power off the amp during the night by a timer.
How are the speakers powered ? Passive or active ?
Passive connected in Parallel or in series ?
For active speakers there are remote switched plugs, some of them work of the internet perhaps or run a separate power wire to the plug & disconnect than one at a central point.
If passive in series if You disconnect one & the others don't work.
I would power off the amp during the night by a timer.