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Very interesting thing I've found out about the RSA Protector

post #1 of 27
5/2/10 at 4:38pm
Thread Starter 
For those who are using the Protector in a balanced configuration please turn off the Protector and turn the volume knob all the way to the max. Make sure you still have your earphones or headphones in, do you hear music? I do, and it's weird. The music though is heavily distorted and weak but it's actually audible!
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post #2 of 27
5/2/10 at 5:04pm
this is not unusual some of my home speakers amps did similar things
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post #3 of 27
5/2/10 at 5:06pm
Ive heard the same thing, also the same thing happens with the pico slim, though the volume doesnt need to be as loud on the slim to be able to hear it. It just means that your source is powerful enough to "push" its way all the way through the amp. Its much easier for me to hear it using my dac19 at home, as compared to running them from a LOD on my iPod classic
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post #4 of 27
5/2/10 at 5:07pm
Thread Starter 
Quote:
Originally Posted by jp11801 View Post
this is not unusual some of my home speakers amps did similar things
Why? Isn't the amp suppose to be off?
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post #5 of 27
5/2/10 at 5:10pm
power is draining from caps that allow the amp to continue to play for a few moments after the amp is powered off
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post #6 of 27
5/2/10 at 5:21pm
Thread Starter 
Quote:
Originally Posted by jp11801 View Post
power is draining from caps that allow the amp to continue to play for a few moments after the amp is powered off
Ohhhh, thanks!
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post #7 of 27
5/2/10 at 11:53pm
Quote:
Originally Posted by jp11801 View Post
power is draining from caps that allow the amp to continue to play for a few moments after the amp is powered off
But then it would only last for maybe half a minute. I'm pretty sure none of these amps use supercaps on their power supply and amps tend to draw a lot of power.

How long does the effect last for?
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post #8 of 27
5/3/10 at 7:16am
Quote:
Originally Posted by semisight View Post
But then it would only last for maybe half a minute. I'm pretty sure none of these amps use supercaps on their power supply and amps tend to draw a lot of power.

How long does the effect last for?
correct my experience with any amp I have tried is just that for a few moments after power down, not sure how long the op has experienced this after power down
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post #9 of 27
5/3/10 at 10:09am
Possibly radio interference?

My Protector doesn't do this. However, I did have an improperly grounded phono stage that picked up radio frequencies which played thru my headphones if the volume on my amp was turned up.

Does the music eventually stop, or is it there continuously after several minutes?
Does it sound like a radio station, or your own music?
Does this occur only when the Protector is connected to the charger? Or also when disconnected from the charger?
What source(s) do you have connected to your Protector?
Does this occur with sources that are disconnected from the mains (iPod, PCDP, etc.)?
Are your interconnects shielded?
Does this only occur in balanced mode, or also SE?
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post #10 of 27
5/3/10 at 10:45am
this may not have anything to do with caps draining (although it most likely does). depending on how sensitive the headphones are, the type of circuit and how powerful the source; even without the battery power there can also be an open circuit through which the power of the line-in signal is enough to make it through in small amounts. I have had this effect with all manner of amps and not always when its recently been on.
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post #11 of 27
5/3/10 at 10:53am
With my jh-13's, if i max out the volume i hear extremely distorted sound, it sounds awful and almost nothing like the music, but you can tell that it is the music, this is coming from either my iPod or dac19. I can see why some wouldnt hear it with a less sensitive headphone.
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post #12 of 27
5/3/10 at 3:18pm
Quote:
Originally Posted by qusp View Post
... even without the battery power there can also be an open circuit through which the power of the line-in signal is enough to make it through in small amounts. I have had this effect with all manner of amps and not always when its recently been on.
Yes. For example, the Headsix - although it is has nothing to do with the volume setting which is necessarily at zero since that is how you turn the amp off.
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post #13 of 27
5/3/10 at 4:09pm
The best example of capacitor draining I've heard was the Xin Reference with it's 2 huge caps. It would play fully normal up to 30-45 seconds after being turned off with some phones
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post #14 of 27
5/3/10 at 4:15pm
i did a week ago some experiments in the physics labs on how long a cap can hold charge and some of the caps took 5 minutes to drain all the charge.also one of my friends tested this on a very bad quality cap and it hold charge for 15 minutes,so ya maybe thats the reason although i definetly dont know.
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post #15 of 27
5/4/10 at 2:30pm
Quote:
Originally Posted by cooperpwc View Post
Yes. For example, the Headsix - although it is has nothing to do with the volume setting which is necessarily at zero since that is how you turn the amp off.

If I recall correctly, my old Corda 2Move would allow some signal through even when powered down.
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