B&K 200.5 S2 Power Amp problem - Please help

since you have power you definitely don't need to worry about the main fuse (15 amp), and likewise you have some sound so you don't have to worry about the speaker fuse) The Rail fuse is a 6 amp Slow Blow with 250 volt rating (6A SB/250V)

Here's the fuse you want - they have them at radio shack:
6 amp Slow Blow fuse

How does your amp sound other than it's not loud? If the rail fuses were out, I'm thinking you would have worse problems than low volume. I also wonder of the volume pots are somehow inside your amp.

Did you compare your amp sound to your friends in your system? If not, your perception may also be resulting from your pre/pro setting.

First, all your fuses would appear to be 'good'. You ARE getting output from all 5 channels, right?

Look at the back panel. There will be a balanced / unbalanced switch near each set of inputs. IF you are using RCA connections, make sure it is set to 'unbalanced'.
Turn the level way down...or the system OFF before adjusting this.
I'll bet the last owner used balanced connections and it is so adjusted.

Also, how sensitive are your speakers? I can't believe that is the problem, but it never hurts to ask. This amp should even drive my low-sensitivity panels OK.

I read the instructions:: no level controls inside the amp.

Magfan - You're right. Last night, I changed RCA/XLR switch from XLR to RCA and the output volumne increased. I thought the amp won't have any sound if the switch does not setup correctly. My bad!!!

Anyway, thank you so much guys for all your help and make my life happy now......

For a second there, I though I was unbalanced!

Good for you......

sounds like it should now, right?

If you run a dedicated outlet of 20A breaker and outlet to an Amp that has a 15A fuse, I`m quite sure you will blow the main fuse on the amp due to allowing 20A come through a 15A fuse.