Madhu_7 I had on 16th Feb an audition of Klipsch sw350,sw450 at AVO k1/14 Basement CR park , New Delhi. The owner Rajeev Mehna was understanding and was warm in his approach towards me, though I had clearly stated that I am for audition only.
Audition was done for music - Western and Indian apart movie clips were also played. Tried to have same volume level when comparing Klipsch 350 and 450. I had 2 more of my friends so that 3 of us could feel the difference.
Truely Klipsch sw450 outperformed Klipsch sw350. To focus on SW 450 - this sub made the difference to music as well as movies. Bass was tight and powerfull. I also particularly love bass effect. In movies ( Body Gaurd fight scene ) Sw 450 provided that body shaking experience. In music ( like Pitbull, Eagles - Hotel California ) ,by adjusting to right amount of sound level , bass was complemented. There was no boomyness in the sound. Tried and played with LFE and Volume and came out that adjustments need to be done for type of sound you prefer, placement and room properties.
As time and opportunity permits will try to write more on other subs I have chance to feel ( I think its more now to feeling than hearing - a step above ).
Thanks for asking ...