Table of Contents
Advertisement
left and right main channels and so these are advised in larger systems where the crossover may be set
below 80 Hz.
To overcome this potential LFE problem, sound engineers are advised by Dolby and DTS to check their
mixes with the LFE channel band limited between 20-80 Hz so they can be sure it still sounds good on
systems with LFE channel that has additional band limiting.
3.4
Cabinet Mounting
3.4.1
Main Loudspeakers
Genelec loudspeakers can be mounted into cabinetry. Experience has shown that the void to the sides
and top of the loudspeaker should be filled as much as possible with insulation or dense open foam. This
usually helps keep the cabinetry resonances under control and inaudible. Some setting of the Bass Tilt
control may then be necessary to compensate for the additional loading on the bass driver - see Section
4.2.2 Using the Room Response Controls.
3.4.2
Subwoofers
Mounting the subwoofers inside cabinetry often gives good results. With the 5050A, HTS3B and HTS4B
all that is required is some additional space: the cavity should be at least 10 cm (4") wider, deeper and
taller than the outer dimensions of the subwoofer. This allows leaving 5 cm (2") of space on either side of
the subwoofer's passive radiators and sufficient space behind and above the enclosure to allow cooling
for the electronics (see Figure 7).
The HTS6 needs 20 cm (8") of free space on the connector panel side where the reflex port is situated.
Resonance in the void are normally in the 200-500 Hz region and so will not be excited by the subwoofer's
limited bandwidth, therefore no damping is required if the void is kept as small as possible.
Figure 7. Required free space around a 5050A, HTS3B or HTS4B subwoofer.
3.5
Home Theater Front 'Wall'
Home Theater front walls consist usually of a structural hard front wall construction with a combination
of standard or custom made cabinetry mounted in front of that hard wall. All loudspeakers, subwoofers,
electronics and cabling are mounted in that cabinetry. A thin structure (often cloth material over wood
frames) covers the cabinetry to hide all equipment but the projection screen.
21
Advertisement
Table of Contents
