This is a DIY project to build a device that will automatically turn on and off your "pro" amplifier. A lot of people around here have built subwoofers powered by pro amps like Crown, QSC, and Behringer. These pro amps have no way to be turned on or off remotely by either 12VDC or 120VAC "trigger" or "switched outlets" from AV equipment. These amplifiers also tend to draw a lot more current than your average AV receiver. Most solutions I have seen used by people are either way underated or prohibitively expensive.
My Behringeer EP2500 has the capacity to draw 9.6 amps at full power according to the manual. At one point in time I had 2 EP2500's and 2 EP1500's plugged into the back of a monster HTS3500. I don't think it was meant to carry that kind of load. If we want to allow headroom so that the device does not heat up and burn out over time, we are looking at something that is rated at 12 amps or more per amplifier.
We could use a mechanical relay with large capacity but they are bulky, mechanical, and noisy. They also have moving parts which tend to fail over time. Or we could use a device known as a "solid state relay" or SSR. This is a sold state version of the mechanical relay. It comes in a small package, can have current ratings in the 100's of amps, and are relatively inexpensive. SSR's are available with either DC or AC voltage control circuits.
The few parts needed are shown below. They consist of:
01) - SSR from surplus or that auction place
02) - Box to mount the SSR in from Mouser Electronics or Radio Shack
03) - 18 AWG 2 conductor power cord for trigger
04) - 14/3 power cord for amplifier current
05) - Strain relief bushings to keep the cords in the box safely
To be continued............
My Behringeer EP2500 has the capacity to draw 9.6 amps at full power according to the manual. At one point in time I had 2 EP2500's and 2 EP1500's plugged into the back of a monster HTS3500. I don't think it was meant to carry that kind of load. If we want to allow headroom so that the device does not heat up and burn out over time, we are looking at something that is rated at 12 amps or more per amplifier.
We could use a mechanical relay with large capacity but they are bulky, mechanical, and noisy. They also have moving parts which tend to fail over time. Or we could use a device known as a "solid state relay" or SSR. This is a sold state version of the mechanical relay. It comes in a small package, can have current ratings in the 100's of amps, and are relatively inexpensive. SSR's are available with either DC or AC voltage control circuits.
The few parts needed are shown below. They consist of:
01) - SSR from surplus or that auction place
02) - Box to mount the SSR in from Mouser Electronics or Radio Shack
03) - 18 AWG 2 conductor power cord for trigger
04) - 14/3 power cord for amplifier current
05) - Strain relief bushings to keep the cords in the box safely
To be continued............
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