Can you put a Krell in an apartment?

Of course you can.

ApartKRELLment

No, you cannot run this amp in your apartment. Take it from one who has had both the FPB 300cx AND the 400cx. I ran my 300cx in a condo and CONSTANTLY was blowing circuits. The 400cx actually has TWO power supplies and absolutely requires a dedicated 20 amp circuit. Given your space, you will absolutely fine with a 300cx and it will sound great. 

There's no big deal about 20 amp. It's used often, especially in kitchens.

In terms of size and weight why would you even want this in a small apartment especially if at some point you want to change things around?
I honestly wish I had the space for something like this but you might see it turn into a major headache physically in spite of it sounding good.

What is the size and weight? It looks like a beast though I bet it sounds great.

I run my Krell 300c on a 15 amp circuit and have never popped a breaker