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 headroom of the LFE channel. Consumer and theatrical 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 following 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
•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 operating 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
EN
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:
Figure 6. The free field frequency response of the 7050B subwoofer at different Bass
harmonic distortion analysis of the 7050B in free field. In half space the SPL will be 6 dB higher.