ice power ac or dc coupled?

back · 23rd July 2010, 05:30 AM

hi guys.

before i through some dc at the input anybody knows if they have a dc block cap?

theAnonymous1 · 23rd July 2010, 12:36 PM

Nisbeth · 23rd July 2010, 02:15 PM

DC servo. Look at the bandwidth specs as well.

/U.

Norman Tracy · 23rd July 2010, 05:56 PM

Reminder, the OUTPUT terminals float at 1/2 the main DC power rail. For example in the block diagram of 200AC posted above it shows Vp = +47V so when the amp is not outputting signal Vo+ and Vo- are each sitting at 47/2=23.5 VDC. Of course once an audio signal comes along they head in opposite directions creating the AC differential output.

I am posting this reminder because often when it is asked "before i throw some dc at the input does anyone know if they have a dc block cap" what is being considered is will the amp multiply the DC input to some large DC value at its outputs.

back · 24th July 2010, 10:32 AM

exactly.

i worry if the dc will be multiplied but i still don`t understand from your answer.

forgive my ignorance.

Nisbeth · 25th July 2010, 10:26 AM

No, it will not amplify DC.

/U.

back · 25th July 2010, 01:39 PM

thanks.

i have done it and it works without problem.

23rd July 2010, 05:30 AM	#1
back diyAudio Member Join Date: Nov 2005 Location: crete	ice power ac or dc coupled? hi guys. before i through some dc at the input anybody knows if they have a dc block cap?

23rd July 2010, 12:36 PM	#2
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	__________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

23rd July 2010, 05:56 PM	#4
Norman Tracy diyAudio Member Join Date: Apr 2003 Location: Tulsa OK USA	Reminder, the OUTPUT terminals float at 1/2 the main DC power rail. For example in the block diagram of 200AC posted above it shows Vp = +47V so when the amp is not outputting signal Vo+ and Vo- are each sitting at 47/2=23.5 VDC. Of course once an audio signal comes along they head in opposite directions creating the AC differential output. I am posting this reminder because often when it is asked "before i throw some dc at the input does anyone know if they have a dc block cap" what is being considered is will the amp multiply the DC input to some large DC value at its outputs. __________________ Norman Tracy Audio Crafters Guild

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23rd July 2010, 02:15 PM	#3
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	DC servo. Look at the bandwidth specs as well. /U.

24th July 2010, 10:32 AM	#5
back diyAudio Member Join Date: Nov 2005 Location: crete	exactly. i worry if the dc will be multiplied but i still don`t understand from your answer. forgive my ignorance.

25th July 2010, 10:26 AM	#6
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	No, it will not amplify DC. /U.

25th July 2010, 01:39 PM	#7
back diyAudio Member Join Date: Nov 2005 Location: crete	thanks. i have done it and it works without problem.

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