O: Amplifier...they're two big (and now explains it's a Pioneer brand)
Finally points to the light and where he draped the jeans.
I'm not buying that story. What did he do on previous nights to black out the LED light? We have one in our bedroom that bugs the heck out of me, and I just make sure the computer is shut down and the screen is off. Blue LED lights can be very distracting.
So does OP pick up a random piece of clothing to cover it every time he sleeps in his bedroom? At this point, a more permanent solution should have been in place (ie, a piece of black tape, or unplug the thing altogether). I wish Nel had asked if the blue LED light turns off if the sound system is turned off.
Just my opinion.
Mel