GM says this :

" If it hums and/or has moving parts, it likely needs at least some, even that fine 09 BD player. My 23FD perks right up with a stack of old vinyl albums holding it down.

GM "

LOL. YES !! , just read your words above !!

My Pioneer Elite BPD-09FD weighs about 30 pounds. But I just looked at it, and sure enough, I had placed a $1.47 16.5 pound concrete square on it, maybe six months ago, when I was doing my A7 enclosures.

Here : http://www.pioneerelectronics.com/PU...ayers/BDP-09FD

Also, much concrete is added on my 45 DIY DC SET amp, all over it !!

'Need to look-up 'yer 23FD next.

Jeff Medwin Low Ohms