User manual GENELEC 8050A

[. . . ] can cause unwanted colouration and blurring of the sound image. These can be minimised by placing the loudspeaker clear of reflective surfaces. For instance, putting the loudspeakers on stands behind and above the mixing console usually gives a better result than placing them on the meter bridge. Amplifiers The amplifier unit is mounted in the rear of the loudspeaker enclosure. The unit incorporates special circuitry for driver thermal overload protection. [. . . ] The stand can be attached to three mounting points allowing vertical and symmetrical horizontal positioning (see figures 1 and 4). Genelec 8040A and 8050A can be fitted to Omnimount® Series 30 (8040A) and 60 (8050A) and König & Meyer loudspeaker mounts on two sets of M6x10 mm threaded holes on the back of the enclosure. On the base of the enclosure is an M10x10 mm threaded hole which can be used for securing the loudspeaker to its base. Do not use this thread for mounting the loudspeaker on a microphone stand which has a 3/8" UNC thread. and the loudspeaker. The factory settings for these controls are all "OFF" to give a flat anechoic response. Bass roll-off control Bass roll-off (first switch group from the left) affects the low frequency roll-off of the loudspeaker and attenuates its energy output near the cut-off frequency. Attenuation levels of -2, -4 or -6 dB can be selected. Desktop low frequency control The desktop low frequency control (fourth switch of first switch group from the left) attenuates the bass frequencies around 160 Hz by 4 dB (see figures 8 and 10). This feature is designed to compensate for the boost often occurring at this frequency range when the loudspeaker is placed upon a meter bridge, table or similar reflective surface. Bass tilt control The bass tilt control switches (second switch group from the left) offer three attenuation levels for the bass response below 800 Hz, usually necessary when the loudspeakers are placed near room boundaries. The attenuation levels are -2 dB, -4 dB and -6 dB. Setting the input sensitivity The input sensitivity of the loudspeakers can be matched to the output of the mixing console, or other source, by adjusting the input sensitivity control on the rear panel (see figure 1). A screwdriver is needed for the adjustment. The manufacturer's default setting for this control is -6 dBu (fully clockwise) which gives an SPL of 100 dB @1m with -6 dBu input level. Setting the tone controls The frequency response of the system may also have to be adjusted to match the acoustic environment. The adjustment is carried out by setting the three tone control switch groups "treble tilt", "bass tilt" and "bass roll-off" on the rear panel of the amplifier. There is also a special "desktop low frequency" tone control which gives an attenuation of 4 dB at 160 Hz to compensate the effect of a mixing console, desk or other reflective surface between the listener Speaker Mounting Position Flat anechoic response Free standing in a damped room Free standing in a reverberant room Near field or console bridge In a corner Treble tilt None None None None None Bass tilt None -2 dB -4 dB -4 dB -4 dB Bass roll-off None None -2 dB -4 dB -4 dB Table 1. Suggested tone control settings in some typical situations Figure 5. The Iso-PodTM can also be attached to the side of the enclosure for horizontal mounting. Figure 7. Carrying bag for a pair of 8040A loudspeakers. Treble tilt control Treble tilt (third switch group from the left) allows adjusting the treble response above 5 kHz by +2, -2, or -4 dB, which can be used for correcting an excessively bright or dull sounding system. An acoustic measuring system such as MLSSA or WinMLS is recommended for analyzing the effects of the adjustments, however, careful listening with suitable test recordings can also lead to good results if a test system is not available. Table 1 shows some typical settings in various situations. [. . . ] Do not obstruct airflow around the loudspeakers. Genelec 8040A and 8050A loudspeakers are capable of producing sound pressure levels in excess of 85 dB, which may cause permanent hearing damage. 8040A Accessories Floor stand black Wall mount black (Omnimount) Ceiling mount black (Omnimount) Wall mount black (K&M) Soft carrying bag for two monitors Order code 8000-400 8040-404-B 8040-405-B 8000-401 8040-420 8050A Accessories Floor stand black Wall mount black (Omnimount) Ceiling mount black (Omnimount) Soft carrying bag for one monitor Order code 8000-400 8050-404-B 8050-405-B 8050-420 Maintenance No user serviceable parts are to be found within the loudspeaker cabinet or the ampli- Figure 8. The curves above show the effect of the "bass tilt", "treble tilt", "desktop low frequency" and "bass roll-off " controls on the free field response of the 8040A. Figure 9. The upper curve group shows the horizontal directivity characteristics of the 8040A measured at 1 m. [. . . ]