Putting the sub close to your seating position is called a near field placement. It can help achieve better output performance in large rooms. The answer to your question about "can you be to close to the sub"? The answer is, not really.Will your sub sound best in a near field placement? Maybe, maybe not. It may sound better somewhere else in the room. Now if you lack room for the sub in the room and this is your only choice. Then you don't have much choice. Give it a try and see how it sounds. You can always turn it down if it's to loud in a near field position.