Pro Amp With Auto On Function - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 34 Old 02-26-14, 03:21 PM Thread Starter
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Pro Amp With Auto On Function

sorry if this has been asked before, i've searched but have come up empty... are you guys aware of any of the pro amps that feature an auto on function? seems like a trivial feature, but it is rather necessary in an installation i'm considering.

thanks for any suggestions,
scott
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post #2 of 34 Old 02-26-14, 03:52 PM
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Re: Pro Amp With Auto On Function

I cant think of any but there are other options. One of the best is getting one of these Ethereal power conditioners that have a built in trigger for several of the outlets.

Home theater:
Onkyo 805, Yamaha YDP2006EQ, Samson Servo 600 amp
3 EV Sentry 500 monitors across the front, 4 Mission 762i's Surrounds, SVS PB13U sub, Panasonic BDT220, Harmony 1100, Nintendo WiiU
Panasonic PT-AE8000 on a 120" 2,35:1 fixed screen

Living room system:
Sherwood/Newcastle R972, Mission 765's, SVS SBS02's, A/D/S MS3u sub, Yamaha YDG2030EQ
Yamaha KX-393 Tape deck, CDC 805 CD changer, Panasonic BD60, Sony turntable PS-T20
Panasonic TC-P50ST60, HD-PVR & WDTV Live, Harmony 900

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post #3 of 34 Old 02-26-14, 03:52 PM
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I can't think of one. But do you have a power center of some sort. I have mine plugged in to a switch outlet on the power center and it works great. I hit one button and everything except the blu ray. Xbox. Dish etc. Then you just turn the one of those you want on and enjoy. Works great to power the projector on also.
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post #4 of 34 Old 02-26-14, 03:58 PM
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Re: Pro Amp With Auto On Function

Quote:
qx56 wrote: View Post
Works great to power the projector on also.
A switched outlet for a projector is a bad idea as switching it off before it has gone through its cool down cycle will damage the bulb.

Home theater:
Onkyo 805, Yamaha YDP2006EQ, Samson Servo 600 amp
3 EV Sentry 500 monitors across the front, 4 Mission 762i's Surrounds, SVS PB13U sub, Panasonic BDT220, Harmony 1100, Nintendo WiiU
Panasonic PT-AE8000 on a 120" 2,35:1 fixed screen

Living room system:
Sherwood/Newcastle R972, Mission 765's, SVS SBS02's, A/D/S MS3u sub, Yamaha YDG2030EQ
Yamaha KX-393 Tape deck, CDC 805 CD changer, Panasonic BD60, Sony turntable PS-T20
Panasonic TC-P50ST60, HD-PVR & WDTV Live, Harmony 900

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post #5 of 34 Old 02-26-14, 07:31 PM
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Re: Pro Amp With Auto On Function

You can make a non-auto amplifier a switched one by using a simple relay with a 12Vdc coil and 120Vac contact. All you need is a 12V trigger to make it work, which sadly is usually only available on high-end AVRs.

Quote:
tonyvdb wrote: View Post
A switched outlet for a projector is a bad idea as switching it off before it has gone through its cool down cycle will damage the bulb.
+1 on that!


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post #6 of 34 Old 02-26-14, 07:47 PM
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I never shut it down that way. I always turn the projector off the proper way and then hit the button on the power center. Although my last projector I hard powered it down for 5 years and 2000 hours on the bulb. It was still going strong when I sold my last house. Im sure sometimes my wife or son forget and just hit the switch but its not the end of the world. 99% of the time we do it the "right" way.
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post #7 of 34 Old 03-03-14, 06:47 AM
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This is my solution to the same problem - my receiver also doesn't have a signal voltage output. Using a smart strip with the sense outlet to the receiver:
http://www.belkin.com/us/p/P-F7C007/

But rather than run the subwoofer power amplifier (EP2500) off the switched outlet directly; I run a 12v plug pack (wall wart) that switches a SSR.
With the inrush current to a toroid up to 20x the operating current I don't see the smart strip lasting long otherwise.

Pro Amp With Auto On Function-forumrunner_20140304_010934.png
You're not really supposed to use a zero crossing solid state relay with an inductive load as it switches at the highest load, but this unit is designed for 400A inrush (at our nominal 230v!) so I'm quite sure it will be fine. It's rated at 40A continuous with full heatsinking. The SSR is attached to a 10mm aluminium plate which should be well into the safe zone. And here in 230v land the EP2500 is 8A max. According to the data sheet I could probably run it without a heat sink at all.

Anyhow, much nicer than a mechanical relay generating emi, and contacts to wear out, without an appropriate additional arc suppression circuit. The SSR has a built in snubber.
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post #8 of 34 Old 03-03-14, 06:51 AM
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post #9 of 34 Old 03-03-14, 07:45 AM
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Re: Pro Amp With Auto On Function


For those looking for a cheap and easy “plug and play” option, Adcom used to make a nifty power distro called the ACE-515 that can be found on ebay in the $100 range. The outlets are triggered by a switched outlet from your receiver. It also features off and on power sequencing. I think Panamax and Monster offer more modern units with similar features that are 12-volt triggered, but I’m sure cost quite a bit more.

Regards,
Wayne



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post #10 of 34 Old 03-15-14, 01:18 PM
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There are a lot of options until you need to pull 20 amps or more. Im working on a DIY Trigger box for the shack now. It should be up shortly.
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