I'm on the same page a Bill - of course I suspect this is because we share the same concept of slam. Short transients that pressure the room/ears - it is almost more of a feeling than "sound" as it is so transient. This is completely different from tremendous impressive bass - my speakers with 12" woofers have very little heavy bass response - on most music it is nearly all transient effects at the low end that you perceive..... except, of course on double bass and organ if you get my meaning.
To get the full impact you also need to buy the right music - try Keb 'Mo "Slowdown" album - it has a very nice dynamic recording of drums - and use this to audition speakers. You also may need to buy acoustic treatments and use a bass management system to get a reasonably flat in room response....room modes can mess up slam too. Perception of Slam is also related to the way the 3 to 5 KHz region behaves ....many audiophile designs are deliberately rolled off in the upper mid range region (for that more polite laid back enjoyable sound) and this will reduce the perception of slam ....which is why I suggested giving pro speakers an audition.
I suspect the Genelec's may be a wee bit small in a 20 by 20 foot room but if you don't listen loud it may be worth a try.
To get the full impact you also need to buy the right music - try Keb 'Mo "Slowdown" album - it has a very nice dynamic recording of drums - and use this to audition speakers. You also may need to buy acoustic treatments and use a bass management system to get a reasonably flat in room response....room modes can mess up slam too. Perception of Slam is also related to the way the 3 to 5 KHz region behaves ....many audiophile designs are deliberately rolled off in the upper mid range region (for that more polite laid back enjoyable sound) and this will reduce the perception of slam ....which is why I suggested giving pro speakers an audition.
I suspect the Genelec's may be a wee bit small in a 20 by 20 foot room but if you don't listen loud it may be worth a try.