2230 DC voltage

[Wpala]

Hi there great forums very informative learning something everyday.
New to me Marantz 2230 works great but out of curiosity checked the Dc voltage on speaker terminals and both are reading around 35DCV I ahve always thought that is very bad for the speakers and was planing on doing re-cap on this unit but then I started reading this forum and found out that for a
"any DC on a Cap coupled output can be considered normal"
now I'm confused a bit why would some equipment be bad with a DC voltage on the speakers terminal and could damage the speakers and on this unit seems to be ok thing?
I'm a bit of the "knob" with the electronics would like to learn how to do things myself and enjoy the process so go easy on me with the comments but some sort of explanation would be greatly appreciated, I'm sure ther is few others that would be interested in this topic as well
Cheers
Paul

 

[petehall347]

try voltages with speakers attached
p.s your line voltage might be a little high . manual says 29v .
so long as it is working ok i would leave it alone .

 

[catrafter]

On units with capacitive coupled power amp outputs (like the 2230), it is normal to see voltage on the speaker terminals when no speakers are connected.
Enjoy!

Tom

 

[Steven Tate]

Echowars has a 200+ page thread about DC offlset that is highly educational. This topic came up on page 20 and here was his short explanation:

"Sounds like this might be a cap-coupled unit. Without speakers hooked up, the '-' side of the cap has no DC return, and so will collect a charge. This would explain why the huge voltage readings you saw with the speakers disconnected goes away when you connect 'em."

If you have some spare time and want to learn a lot, read the first few pages and then scan posts as far into it as you can bear. You will learn a lot.
Steve

http://audiokarma.org/forums/index.php?threads/amplifier-distortion-dc-offset-and-you.5634/