You can do an in-room demo
NHT Classic Three from Stereophile
The NHT Classic Three's voltage sensitivity was significantly lower both than average and than specified, at an estimated 83dB(B)/2.83V/m. However, its impedance was generally higher, dropping below 6 ohms only in the lower midrange and above the audioband (fig.1). The minimum value was 4 ohms between 120Hz and 170Hz, but there is also a combination of 5.5 ohms and –46° electrical phase angle at 94Hz that will demand a goodly amount of current from the partnering amplifier.
Who and Where - is the Way, the Truth and the Life?
Speakers > MB Quart VS05, Boston VS260, Snell K7
Subwoofer > Mordaunt Short Aviano 7
Receiver > Tascam PAR-200, Pioneer VSX-30