How do I set the acoustic tone controls (I am getting too much bass)?GENELEC monitors are all calibrated in an anechoic chamber for free field conditions, i.e. no nearby reflecting boundaries that create comb filtering or load the drivers. The consequence of this is that when the monitor is placed in a room the low frequency driver receives additional loading from nearby boundaries. This has the effect of increasing the omni-directional bass energy and so the music will sound 'bass-heavy' and 'muddy'. To achieve a flat low frequency response an adjustment of typically -4 dB on the bass tilt control is required. However, rooms vary in their shape, size and layout so sometimes only -2 dB or even -6 dB is required.
Often there is some remaining interaction between the room and the monitor so GENELEC also provides a bass roll-off control to compensate for excessive LF energy around the low cut-off frequency.
Differences in room reverberation time and listening distance can lead to changes being required in the treble region so treble tilt is fitted to most of the models in the GENELEC range.
On the three-way monitors and large systems there are additional driver controls for the bass level, mid level and treble level which enable very fine adjustment of the frequency response so that monitors can be placed in many different listening environments whilst still achieving a consistent and neutral sound reproduction.
The best way to set the tones controls of a GENELEC monitor is by measurement using a system such as WinMLS or MLSSA. Unfortunately, this is unavailable to most users so the Quick Set-up Guide supplied with the monitor gives a good starting point that will give satisfactory results in most typical situations. GENELEC and its Distributor network offer a free calibration service where a Genelec Product Specialist will come to your studio and measure the monitors on site. Consult your dealer or country distributor for details of availability as this service only applies to the larger monitors in the range.