Stereophile's analysis of the B&W Matrix 801 was published long before the magazine acquired the DRA Labs and Audio Precision measurement systems used for its loudspeaker reviews. As my wife owns a pair of the big B&Ws, however, I have measured the speaker at various times over the past 13 years. Here, then, is a complete but never-before-published set of measurements to accompany Lewis Lipnick's 1987 review.
At an estimated 87dB(B)/W/m sensitivity, the B&W 801 is average in this respect. But as can be seen from the plots of its impedance…