raph 1 shows the averaged in-room frequency response of the B&W 603 S2 speakers as measured by . You can immediately see that between 100Hz and 20kHz the response is extremely controlled and linear, varying by only a little more than ±1.5dB. That is a remarkable achievement on the part of B&W’s engineers. You can also see that there’s no spectral skew — the plus and minus variations are distributed fairly evenly over the more than seven octaves this frequency span represents. Below 100Hz the response rolls off very evenly,
