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Old 27th March 2008, 09:13 PM   #1
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Default Power outlets on Pre-amp

Hi folks.
I am running a rotel RC995 Pre amp and 2 RB971 (effectively as a class D amp each).
My question is this:- My RC995 has 2 switched power outlets so when it is turned on it can power 2 other components. Is it advisable to run my power amps through these so when i turn on my pre amp they also come on. WOuld it degrade the sound etc if i do this.
Grateful of any advice.
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John
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Old 28th March 2008, 02:37 AM   #2
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Typically a pre-amp power switch is only rated to switch low power devices like CD players and AM/FM tuners. The switch won't last long if it's used to turn on power amplifiers. But while it still works, it won't affect the sound quality.
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Old 29th March 2008, 04:19 PM   #3
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Thanks for the reply.
In the manual, it stated that the switching will do up to 800w total power consumption. The power amps have a power consumption of 250w each, leaving a redundancy of 300w in total.
So, assuming that the total is cumulative (and i am not missing an obvious rule that states when connecting 2 or more items that the out put of each is doubled etc) i should be safe connecting them?

Also, my power amps currently use a 3 pin plug arrangement (uk) and the connectors in the rear of the pre amp are 3 pins but in a different configuration (rectangular push in connector with a flat horizontal centre feamale and one squareish small feamle either side). As i am new to electronics, i am not sure what this is called and where i can get one.
Grateful of any help
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John
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Old 29th March 2008, 04:29 PM   #4
TheMG is offline TheMG  Canada
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Is it something like this?

Click the image to open in full size.

Those are IEC type C19/C20 connectors.
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Old 29th March 2008, 04:35 PM   #5
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No. Looking at it more closely. the middle pin does not appear to have any metal connection (almost looks like a recess). The 2 connector pins are vertical and are rectangular.
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John
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Old 29th March 2008, 05:26 PM   #6
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You should be OK. Class "D" amps don't have the huge inrush current that some DIY class "A/B" amps do. "A/B" amps with very large filter capacitors are hard on switches and rectifier bridges.
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