LABORATORY TEST REPORT

Graph 1 shows the in-room frequency response of the Harbeth Compact 7ES-3 XD loudspeakers when measured using a pink noise test stimulus. It’s the averaged result of nine individual measurements, taken in a grid pattern with the tweeter at the centre of the grid. You can see that it’s extraordinarily flat-monitor-standard flat in fact-not only across the midrange, but also in the upper bass and the lower and upper treble regions.

Across the area between 2kHz and 8kHz, the response is so linear that it essentially tracks the graphing grid, so it’s essentially ±0.1dB. Between 140Hz and 2kHz, the