Munro Sonic EGG100, Руководство по эксплуатации

Страница: 7 / 12

7
EGG100 MONITORING SYSTEM
Operation Manual
Equalisation
The EGG100 is naturally neutral in its frequency response. This is mainly a result of the acoustically optimal enclosure
and the choice of small drivers with almost perfectly controlled directivity. However, not all rooms are neutral and
also the positioning of the speakers will affect the response. Placing a speaker very near a wall will increase bass and a
corner will have even more effect. This is because energy is reflected from any surface and that energy will be in phase
with the direct sound at low frequencies. This might sound like a good thing but without some degree of acoustic
treatment the results can be unpredictable as at some frequencies the reverse will occur and the reflections will
tend to cancel the direct energy. The EGG has precision trim potentiometers to equalise the bass and high frequency
response for a given location. The HF trim can be used to compensate for acoustic imbalances or (more likely) personal
preference. We all hear high frequencies in slightly different ways and also some allowance may be required for the
intended reproduction of the recording although almost all media have a ‘flat’ response these days. As a general guide
a quarter turn (90
o
) will give 2dB of attenuation of the highest octave and that is the preferred setting for most studio
monitoring applications.
Control Unit
The EGG is unique in that all the electronics are housed in a separate unit that can be placed within reach of the
operator and within the listening area. This has several important advantages.
• All balancing and adjustment can be done without having to move back and forth behind the speakers.
• The power amplifiers do not compromise the acoustic integrity of the EGG ‘shell’.
• The unit acts as a volume controller in its own right.
• The 2m speaker cables allow the unit to be placed in a rack or free standing.
• Power can be switched without having to clamber behind the speakers.
Protection
The EGG100 is well protected against electronic malfunction. An LED indicates when the system is approaching audio
clip and this (when illuminated continuously or for more than a few seconds) should be regarded as a warning to
reduce monitoring level. The high currents used in professional loudspeakers are capable of generating very high
voice coil temperatures and prolonged loud listening can cause driver failure. Loud transients will pass through the
system unhindered and the intermittent triggering of the overload LED is quite acceptable. Some manufacturers
prevent this by limiting and signal processing but this can give a false impression of true dynamic range and can also
impair sound quality.
The HF driver is fitted with a self resetting thermal fuse, therefore if the HF driver stops working, reduce the level and
allow a few minutes for the fuse to reset. Then resume working but at a lower level to avoid a repeat.
Setting up your System