Figure 2. Location of the acoustic axis

 

 

Cable

 

 

RCA

Screen

XLR

 

 

 

(Source)

 

(Speaker)

Figure 1. Amplifier panel layout of the 8040A

Figure 3. RCA to XLR cable

 

 

Minimum clearances

Sufficient cooling for the amplifier and functioning of the reflex port must be ensured if the loudspeaker is installed in a restricted space such as a cabinet, or integrated into a wall structure. The surroundings of the loudspeaker must always be open to the listening room with a minimum clearance of 5 centimeters (2") behind, above and on both sides of the loudspeaker. The space adjacent to the amplifier must either be ventilated or sufficiently large to dissipate heat so that the ambient temperature does not rise above 35 degrees Celsius (95°F).

Mounting options

The vibration insulating Isolation Positioner/ Decoupler™ (Iso-Pod™) table stand allows tilting of the loudspeaker for correct alignment of the acoustic axis. 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.

Setting the input sensitivity

The input sensitivity of the loudspeakers can be matched to the output of the mixing con- sole, 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

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.