RB-930AX Power Switch "pop"

[rotarius]

Hello, I am new to club rotel. I recently purchased an RB-930AX and RB-970BX amps to bi-amp my mains and they both sound great the only issue is when I power up the 930, the speakers "pop" but they don't with the 970. So is this normal for a 930 or is there something I can do to fix it? Any input from someone who owns/owned this amp will be greatly appreciated.
Darius

[GosonFletchy]

I have had amps in the past that had slight pops when powered up and I think that it can be normal as long as it is not extremely loud and possibly damaging to the speaker.

G.

:assimilate:

[rotarius]

I have had amps in the past that had slight pops when powered up and I think that it can be normal as long as it is not extremely loud and possibly damaging to the speaker.

G.

:assimilate:

Well it's not a loud "thud" because the amp only powers the mids/tweeters but it's not quite faint either. So what could cause it in some amps and not others?

[soundhound]

Mechanical switches, relay contacts can get "dirty". There are some very good contact cleaners on the market that can remedy most instances of this.