Poly count (base mesh):

-Amplifier: 13756

-CD Player: 10662

-Turntable: 35500

-Speaker (single): 10983

-Shelf: 12032

-Whole scene: 93916

-Misc:

The base mesh is supplied so you can set the sub-d levels to your liking (what you see in renders is sub-d level 2; suitable for most cases; for even "closer" slose-ups, lvl. 3 should do just fine), and also, the modifiers are not applied, so you can even tweak the roundness of (most) edges.