Are they more boomy sounding than other speakers you have had in the same position in your listening room using the same electronics? With quality speakers like that, boominess is usually caused by an interaction with your room and/or floor, and then by lack of control of the speakers woofers by you amplifier.
Try moving the speakers away from room boundaries (back wall and side walls) and see if that helps you at all. Another trick to try is plugging the port with a sock or some foam, especially handy if placement is less flexible to achieve best sound. If you have a floor that happens to vibrate at certain frequencies, or reflect vibrations back into your speaker cabinets, that can also cause trouble. Isolating your speakers with a thick wooden or other kind of platform can sometimes stem this.
If the cheap stuff doesn't work, a more powerful amplifier capable of exerting greater control over the Paradigm's woofers can help. These speakers have such great resolving power that I would be careful to add power along with equal measures of finesse, or you may end up with tight bass and fingernails on the black board treble (i.e. spend more money). You may also want to to look at your source, since older CD players and some turntables have less than stellar bass that you may just now recognize if the Studios go down deeper with more fidelity than your previous speakers.
