"Slam-factor" has more to do with the amp and speaker combination than it has to do with the amp alone. I've heard speakers take the slam out of amps that supposedly have a lot of slam. And I've heard speakers make supposedly slam-less amps sound slamming.
It would be nice if we could simply look at specs to determine if an amp has slam, but this is not the case. If you do look at specs also look at the speaker's efficiency and impedence. Usually, high efficient and high impedence speakers with lower powered tube amps or low efficient with low impedence with mega wattage solid state amp produces the right amount of slam.
It would be nice if we could simply look at specs to determine if an amp has slam, but this is not the case. If you do look at specs also look at the speaker's efficiency and impedence. Usually, high efficient and high impedence speakers with lower powered tube amps or low efficient with low impedence with mega wattage solid state amp produces the right amount of slam.