If you are worried. bring it all up with no speakers connected, connect a multimeter then slowly wind up the volume, there should be no appreciable DC on the speaker terminals. Things do age, drift is possible, as well as component failure so it cannot hurt to be cautious and check. Something can also be said about purposely feeding DC into an amp (with no speakers) to verify it's protection circuits are present and actually work, a 'fire drill' for your amp.
Yes in case of a doubt I would definitively do this ! Once is sure : if for any reason a significant dc part is injected in a power amp with no dc blocking feature the woofers will move until stop and quickly burn out ! Exactly this happened to me a long time ago with a DIY preamp where I unintentionally bypassed the output coupling capacitors + Hi-End power amp without input capacitors "by design" (Jean Hiraga 2x20W Pure Class A, still in use). In France we say "a forewarned man is worth two" ... Note : no issues with the other speakers than woofers because they normally have hi-pass filters.
Life is full of risks...the chance of your speakers getting fried from a DC offset is smaller than the chance of having a serious car accident on your next trip. So before adding capacitors to protect your speakers, make sure you sell your car.
The letter writer read on audio forums "this that and the other" from other audiophiles. We can alway count on audio forums to give us the wrong answers. Actually better opinions on audio in pubs, elevators, food courts; maybe even laundromats.
dc offsets must remain minimum always , to ensure direct dc coupling , safe , on direct switching on of amplifiers , dc levels has to stablised , by having an on timer relay .
As a general rule you want to have as few capacitors in the signal path as possible, ideally none. Decoupling caps sit in the signal path normally on the output of the preamp or the input of the power amp. If you must have one this is the one where getting the highest quality is most important. With solid state preamps DC offset is unlikely to be an issue. With valve preamps you might have a problem if one of the tubes goes out of wack.
My Audible Illusions preamp with phono stage had a switch that bypassed the DC output blocking capacitors was feeding an Audio Research tube amp for many years without even a whisper of this or any problem that the writer is speaking about.
You have 2 pcs. protection circuits! One is a capacitor on the input or output of a preamplifier and amplifier. This is to protect against DC. current that may occur if there is a fault with the equipment. DC. is amplified in amplifier, preamplifier and can blow up your speakers, amplifier. Anything you run sound through will weaken the sound in one way or another. You don't always hear this very well Number 2 is a real card connected between amplifier and speaker that sits inside the amplifier which cuts the signal if there is 1.5v DC or more.
Why would anyone want DC coupling ? I know I know capacitors have phase shifts but aren't they less noticeable than all that circuitry used to detect DC offset ?
@@hugobloemers4425 No but that is a good point. I should add a few more videos since I have so interesting ones. I was the third commenter. Normally I am first but I like to give losers a chance to win once in awhile.
@@funny0000000 "I was the third commenter." I was third at the lunch counter. But you do not see me spamming forums with useless information that no one asked for, virtually no one cares about, and is 100% divorced from the topic of the video. "Normally I am first but I like to give losers a chance to win once in awhile." If you deem it necessary to announce that you are first, third, or whatever, then no need to look for other losers. If you deem yourself to be a winner, by being first, third, or whatever, then no need to look for other losers. A good start is for a loser to recognize that they are a loser when they announce such things.
@@NoEgg4u Read the comment I posted on the video the day before about bass. It was top rates with 14 thumbs up. I don't spam. Normally I write a comment but if I have nothing interesting to add I just comment something to help the youtube channel out. It is not spam. All the youtubers like comments. It helps the youtube algorithm so they get views and money. I leave many meaningful comments on his videos. Go look them up. I was only trying to help. I am not a loser, I have over 1 million dollars in muscle cars and a 100K in audio equipment and designed speakers since I was 10 years old. By you interacting with me it also helps Paul's channel out. You guys are the losers because you have no clue how business or youtube works and you want to argue about helping a channel out. I won't comment anymore if that is how you feel but I have so very high rated comments in the past about speaker design and how females like to feel the bass in their third ear as well as how black people have better years that don't go deaf like white people. I know about so much stuff and you want to cry about me saying "third"!?!??! WOW!
@@funny0000000 "Read the comment I posted on the video the day before about bass." I will not. You could have quoted it. "It was top rates with 14 thumbs up." Non sequitur. "I don't spam." You wrote it on the internet. So it must be true. "Normally I write a comment but if I have nothing interesting to add I just comment something to help the youtube channel out." Is that why youtube is such a success? Spam is helping out youtube. Got it. "All the youtubers like comments." I asked my Uber driver, and I asked my pizza guy, and I asked my phrenologist. None of them like comments. Who did you ask? Please provide a link to the survey you took that concluded that all youtubers like comments (especially spam comments). "It helps the youtube algorithm so they get views and money." How altruistic of you to generate income for people by leaving spam comments. "I leave many meaningful comments on his videos." And with each 10 meaningful comments, you earn the honor of being a spammer for the day. "Go look them up." You either have a good sense of humor, or you are living in La La land. "I was only trying to help." Such selfless giving of yourself. "I am not a loser, I have over 1 million dollars in muscle cars and a 100K in audio equipment and designed speakers since I was 10 years old. By you interacting with me it also helps Paul's channel out. You guys are the losers because you have no clue how business or youtube works and you want to argue about helping a channel out." You made my point. "By you interacting with me it also helps Paul's channel out." Paul can buy his next beach house. On which IRS form do you report income from youtube comments? "You guys are the losers because you have no clue how business or youtube works and you want to argue about helping a channel out." It is unfortunate that you see this as an argument. "I won't comment anymore if that is how you feel but I have so very high rated comments in the past about speaker design and how females like to feel the bass in their third ear as well as how black people have better years that don't go deaf like white people." How have the major news networks not featured you on their shows? "I know about so much stuff and you want to cry about me saying "third"!?!??!" You were triggered by my comment. That was not my intention.
If you are worried. bring it all up with no speakers connected, connect a multimeter then slowly wind up the volume, there should be no appreciable DC on the speaker terminals. Things do age, drift is possible, as well as component failure so it cannot hurt to be cautious and check.
Something can also be said about purposely feeding DC into an amp (with no speakers) to verify it's protection circuits are present and actually work, a 'fire drill' for your amp.
Yes in case of a doubt I would definitively do this ! Once is sure : if for any reason a significant dc part is injected in a power amp with no dc blocking feature the woofers will move until stop and quickly burn out ! Exactly this happened to me a long time ago with a DIY preamp where I unintentionally bypassed the output coupling capacitors + Hi-End power amp without input capacitors "by design" (Jean Hiraga 2x20W Pure Class A, still in use). In France we say "a forewarned man is worth two" ...
Note : no issues with the other speakers than woofers because they normally have hi-pass filters.
Life is full of risks...the chance of your speakers getting fried from a DC offset is smaller than the chance of having a serious car accident on your next trip. So before adding capacitors to protect your speakers, make sure you sell your car.
😂Good point.. absolutely no "common" sense these days..😂
The letter writer read on audio forums "this that and the other" from other audiophiles. We can alway count on audio forums to give us the wrong answers. Actually better opinions on audio in pubs, elevators, food courts; maybe even laundromats.
dc offsets must remain minimum always , to ensure direct dc coupling , safe , on direct switching on of amplifiers , dc levels has to stablised , by having an on timer relay .
As a general rule you want to have as few capacitors in the signal path as possible, ideally none. Decoupling caps sit in the signal path normally on the output of the preamp or the input of the power amp. If you must have one this is the one where getting the highest quality is most important.
With solid state preamps DC offset is unlikely to be an issue. With valve preamps you might have a problem if one of the tubes goes out of wack.
class-a amps would not be sitting at 0 if there's no cap to filter out the dc tho? even when working as intended.
Thank you.
My Audible Illusions preamp with phono stage had a switch that bypassed the DC output blocking capacitors was feeding an Audio Research tube amp for many years without even a whisper of this or any problem that the writer is speaking about.
Is it the pre-amps job to block DC or the Power Amp? And how do you know if your pre-amp is working properly, you can’t hear DC?
You have 2 pcs. protection circuits!
One is a capacitor on the input or output of a preamplifier and amplifier.
This is to protect against DC. current that may occur if there is a fault with the equipment.
DC. is amplified in amplifier, preamplifier and can blow up your speakers, amplifier.
Anything you run sound through will weaken the sound in one way or another. You don't always hear this very well
Number 2 is a real card connected between amplifier and speaker that sits inside the amplifier which cuts the signal if there is 1.5v DC or more.
what speakers are those there behind ?.. look nice
The original concept for the aspen speakers. Only one pair ever made.
BTW Your HVAC is pretty loud. Lots of rumble. 😊
Yes indeed it is in that room.
If your power amp gets blown up by the DC offset of your pre-amp, it too had no blocking capacitor. Who is to blame?
"As far as DC offset is concerned, don't worry about your gear. It'll be just fine." And now we have Bikini Atol...
I want a PS audio Phono pre-amp aswell!
Why would anyone want DC coupling ? I know I know capacitors have phase shifts but aren't they less noticeable than all that circuitry used to detect DC offset ?
the best couplings is capacitive coupling , the safest method.
The best coupling capacitor is no capacitor.
Third!
Are you referring to the number of years since you posted a video?
@@hugobloemers4425 No but that is a good point. I should add a few more videos since I have so interesting ones. I was the third commenter. Normally I am first but I like to give losers a chance to win once in awhile.
@@funny0000000 "I was the third commenter."
I was third at the lunch counter. But you do not see me spamming forums with useless information that no one asked for, virtually no one cares about, and is 100% divorced from the topic of the video.
"Normally I am first but I like to give losers a chance to win once in awhile."
If you deem it necessary to announce that you are first, third, or whatever, then no need to look for other losers.
If you deem yourself to be a winner, by being first, third, or whatever, then no need to look for other losers.
A good start is for a loser to recognize that they are a loser when they announce such things.
@@NoEgg4u Read the comment I posted on the video the day before about bass. It was top rates with 14 thumbs up. I don't spam. Normally I write a comment but if I have nothing interesting to add I just comment something to help the youtube channel out. It is not spam. All the youtubers like comments. It helps the youtube algorithm so they get views and money. I leave many meaningful comments on his videos. Go look them up. I was only trying to help. I am not a loser, I have over 1 million dollars in muscle cars and a 100K in audio equipment and designed speakers since I was 10 years old. By you interacting with me it also helps Paul's channel out. You guys are the losers because you have no clue how business or youtube works and you want to argue about helping a channel out. I won't comment anymore if that is how you feel but I have so very high rated comments in the past about speaker design and how females like to feel the bass in their third ear as well as how black people have better years that don't go deaf like white people. I know about so much stuff and you want to cry about me saying "third"!?!??! WOW!
@@funny0000000 "Read the comment I posted on the video the day before about bass."
I will not.
You could have quoted it.
"It was top rates with 14 thumbs up."
Non sequitur.
"I don't spam."
You wrote it on the internet. So it must be true.
"Normally I write a comment but if I have nothing interesting to add I just comment something to help the youtube channel out."
Is that why youtube is such a success?
Spam is helping out youtube. Got it.
"All the youtubers like comments."
I asked my Uber driver, and I asked my pizza guy, and I asked my phrenologist. None of them like comments.
Who did you ask?
Please provide a link to the survey you took that concluded that all youtubers like comments (especially spam comments).
"It helps the youtube algorithm so they get views and money."
How altruistic of you to generate income for people by leaving spam comments.
"I leave many meaningful comments on his videos."
And with each 10 meaningful comments, you earn the honor of being a spammer for the day.
"Go look them up."
You either have a good sense of humor, or you are living in La La land.
"I was only trying to help."
Such selfless giving of yourself.
"I am not a loser, I have over 1 million dollars in muscle cars and a 100K in audio equipment and designed speakers since I was 10 years old. By you interacting with me it also helps Paul's channel out. You guys are the losers because you have no clue how business or youtube works and you want to argue about helping a channel out."
You made my point.
"By you interacting with me it also helps Paul's channel out."
Paul can buy his next beach house.
On which IRS form do you report income from youtube comments?
"You guys are the losers because you have no clue how business or youtube works and you want to argue about helping a channel out."
It is unfortunate that you see this as an argument.
"I won't comment anymore if that is how you feel but I have so very high rated comments in the past about speaker design and how females like to feel the bass in their third ear as well as how black people have better years that don't go deaf like white people."
How have the major news networks not featured you on their shows?
"I know about so much stuff and you want to cry about me saying "third"!?!??!"
You were triggered by my comment. That was not my intention.
First!!!
SO WHAT?
Are you referring to that one subscriber you have?