Genelec 7050C, Руководство по эксплуатации

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General Description
The Genelec 7050C active subwoofer is a
very compact low frequency loudspeaker,
designed to extend the bass reproduction
of Genelec active loudspeakers in stereo
or surround applications. Adding the
7050C to the system creates a compact
nearfield monitoring system capable of a flat
frequency response down to 24 Hz (-6 dB).
Driver
The 7050C contains a single 205 mm (8
in) magnetically shielded low frequency
driver, housed in a Genelec Laminar Spiral
Enclosure
TM
(LSE
TM
) bass reflex cabinet.
Bass Management Unit
The built-in bass management unit has
five signal input and output channels and a
discrete LFE signal input.
The active crossover contained in the bass
management unit splits the input signals into
low and high frequency components at 85
Hz. Frequencies below 85 Hz are directed to
the subwoofer and frequencies above 85 Hz
to the main speakers.
The low pass section sensitivity can be
adjusted from +12 dBu to -6 dBu to allow
easy subwoofer level matching with various
main speakers. All outputs have 0 dB
passband gain.
The input sensitivity of the LFE channel
can be set to 0 dB or +10 dB.
Balanced XLR connectors are used for the
system audio inputs and outputs.
Two "Bass Roll-Off" switches are
included to provide a flat bass response
in all acoustical environments, enabling
adjustments of the subwoofer response
in three -4 dB steps. Two phase
matching switches in the crossover allow
compensation for the delay which occurs
if the subwoofer is placed away from the
main speakers, or for other speaker systems
phase behaviour. Four settings are provided
between 0° and -270°.
ISS TM Autostart
The automatic power saving function ISS
(Intelligent Signal Sensing) can be activated
by setting the “ISS” switch on the connector
panel to “ON.” Automatic powering down
to standby mode happens after a certain
time when playback has ended. The
power consumption in standby mode is
typically less than 0.5 watts. Playback will
automatically resume once an input signal is
detected from the source.
There is a slight delay in the automatic
powering up. If this is undesirable, the ISS
function can be disabled by setting the “ISS”
switch on the connector panel to “OFF.” In
this mode, the subwoofer is powered on and
off using the power switch on the connector
panel.
The “ISS SENSITIVITY LOW” switch
lowers the triggering sensitivity of the
ISS function. This can be necessary if the
subwoofer “wakes up” even if there is no
audio signal.
Amplifier
The amplifier produces 130 W of output
power, with very low THD and IM distortion.
Driver overload protection and power-on
signal muting is included in the amplifier
circuitry. The amplifier also incorporates
thermal overload and short circuit protection.
Installation
The subwoofer is supplied with a mains
cable and this operating manual. Once
unpacked inspect the subwoofer to ensure
that it has not been damaged in transport.
If the subwoofer is brought in from a cold
strorage or transport, let it warm completely
to the room temperature before making any
connections. Ensure that both the subwoofer
and the main loudspeakers are switched off
before making any connections.
Audio connections are made with
balanced XLR cables. The 7050C has IN/
OUT connector pairs for five main channels
and a dedicated LFE input connector
for the LFE channel. Connect the signal
cables from your source to the female XLR
"IN" connectors on the upper connector
row. Next connect XLR cables from the
corresponding "OUT" male XLR connectors
on the lower row to the input connectors of
each main loudspeaker.
Use the "LFE IN" connector for the LFE or
.1 output channel of a 5.1-channel discrete
surround sound source.
Once all connections have been made,
the subwoofer and main loudspeakers are
ready to be powered up.
Positioning In The Room
The placement of the subwoofer in
the room affects the overall frequency
response and sound level of the system
dramatically, as at low frequencies the
effects of the room are strong. Even a
slight change in the subwoofer's location
can make a marked difference in the
frequency balance and often patient and
methodical experimentation and testing
Genelec 7050C Active Subwoofer