[Elecraft] K3: Reception below 500 kHz?

[kw1nd at comcast.net]

I see that the K3 receiver is spec'd down to 500 kHz.  What about below that?  Is it completely dead (e.g. due to filtering), or is it alive but with reduced sensitivity, selection, etc.?  

Will it even tune below 500 kHz? (I've seen some receivers that won't tune at all below their lower frequency specification.)

Just curious...not a deal breaker.

73,

Mike
KW1ND