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the main channels when mixing music and
sound effects for film release.
In Dolby Digital and DTS encoding formats
the LFE channel has to be monitored with
+10 dB gain in relation to the main channels.
The object is to increase the recording head-
room of the LFE channel. Consumer and the-
atrical decoders automatically add +10 dB of
LFE gain to restore the level balance.
The "LFE +10 dB" function on the 7050B
subwoofer is designed to add the +10 dB
gain to the LFE channel in the production
stage, if it is not already done in the output
matrix of the mixing console. The function is
activated by switching the "LFE +10 dB" dip
switch on the subwoofer to "ON".
The "LFE
+10 dB" function should
not
be used in fol-
lowing cases:
• If the +10 dB LFE gain is already
implemented by another device.
• When producing an audio format that
does not require the use of +10 dB
gain on the LFE channel, such as
DVD-Audio (MLP), SACD (DSD) etc.
• When monitoring a decoded Dolby
Digital or DTS soundtrack. The decoder
will automatically provide +10 dB
LFE gain.
Safety considerations
Genelec 7050B subwoofer has been
designed in accordance with international
safety standards. However, to ensure safe
operation and maintain the unit in safe oper-
ating condition, the following warnings and
cautions must be observed:
• Servicing and adjustment must only be
performed by qualified service
personnel. The subwoofer cabinet or
electronics unit must not be opened.
• Do not use this subwoofer with an
unearthed mains cable or an unearthed
mains connection as this may
compromise electrical safety.
• Do not expose the subwoofer to water
or moisture. Do not place any objects
filled with liquid, such as vases on the
subwoofer or near it.
• This subwoofer is capable of producing
sound pressure levels in excess of
85 dB, which may cause permanent
hearing damage.
• Free flow of air around the subwoofer is
necessary to maintain sufficient cooling.
Do not obstruct airflow around the
subwoofer.
• Note that the amplifier is not completely
disconnected from the AC mains service
unless the mains power cord is removed
from the amplifier or the mains outlet.
Warning!
This subwoofer is capable of delivering sound
pressure levels in excess of 85 dB, which
may cause permanent hearing damage.
Maintenance
No user serviceable parts are inside the
subwoofer. Any maintenance of the unit must
only be performed by qualified service per-
sonnel.
Guarantee
This product is supplied with a ONE year
guarantee against manufacturing faults or
defects that might alter the performance of
the unit. Refer to supplier for full sales and
guarantee terms.
EC Declaration of Conformity
This is to certify that Genelec 7050B Active
Subwoofer conform to the following standards:
Safety:
EN 60065 / IEC 60065:1998 6th Edition
EMC:
EN 55020 : 2002 + A1 : 2003
EN 55020: (1994), A11: (1996), A12: (1999),
A13: (1999), A14: (1999)
EN 61000-3-2 (2000)
EN 61000-3-3 (1995)
The product herewith complies with the
requirements of The Low Voltage Directive
73/23/EEC, EMC Directive 89/336/EEC and
93/68/EEC
Signed:
Ilpo Martikainen
Position: Managing Director
Date: 3-May-2005
Figure 7. The curves above show the
harmonic distortion analysis of the 7050B
in free field. In half space the SPL will be
6 dB higher.
Figure 6. The free field frequency
response of the 7050B subwoofer at
different Bass Roll-Off settings