Genelec 7073A User manual

Genelec 7073A
Active Subwoofer
Data Sheet
7073A

The Genelec 7073A active subwoofer is a
powerful and precise bass reproduction tool
for large Surround Sound or Stereo installa-
tions. Its 19 Hz lower cut-off frequency and
124 dB sound pressure output capability
are sufficient to handle the most demanding
high SPL applications. All electronics are
integrated into the subwoofer cabinet: active
crossover filters, driver overload protection
circuits and power amplifiers. The built-in
bass management unit on the 7073A has six
signal input and output channels (L/C/R Front
and L/C/R Rear), LFE input and summed
signal output connectors, providing great
flexibility and easy connection. The discrete
LFE signal input is equipped with a select-
able 85/120 Hz low-pass filter and a 0/+10 dB
LFE sensitivity switch. An integrated 85 Hz
test tone generator is provided for accurate
crossover phase alignment.
The 7073A also features adjustable Sensi-
tivity, Bass Roll-Off and Phase matching con-
trols to tailor the response of the subwoofer
to its environment.
Cabinet construction
The speaker cabinet of the 7073A is a bass
reflex design constructed of MDF and heavily
braced to eliminate structural resonances. The
black paint finish is rugged and stratch-resis-
tant. The long, straight bass reflex tube runs
along the rear wall of the speaker cabinet and
opens on the connector panel side.
The crossover electronics are mounted
on vibration absorbers to ensure rattle-free
operation. The protective cast-aluminium
grilles also function as heatsinks for the
power amplifiers.
Drivers
The 7073A has four 305 mm (12”) cone driv-
ers. The drivers are magnetically shielded
long throw types capable of producing high
SPLs.
Amplifier
The amplifiers on the 7073A produce a total
of 1000 W of short term RMS power with very
low THD and IM distortion. Driver overload
protection and power-on signal muting are
included in the amplifier circuitry.
Bass management unit
The built-in bass management unit of the
7073A splits the six main channel input sig-
nals into low and high frequency components,
accurately dividing the input signal between
the subwoofer and the main speakers. The
crossover frequency is fixed at 85 Hz. The
low pass section has an adjustable sensitiv-
ity, to allow easy level matching with the main
speakers. The six high pass sections have 0
dB passband gain. The high pass filters can
be bypassed using an optional bypass switch
System
Main Features:
• Efficient port/enclosure design
• Highly configurable 6.1 channel
Bass Manager
• Unparalleled low frequency
performance
• Phase calibration Tone
• RJ11 remote control connection
• SUM out and in for “daisy
chaining” units

so that the effect of the subwoofer on the
whole monitoring system can be determined.
Balanced XLR connectors are used for the
system inputs and outputs.
A dedicated “LFE IN” input connector
allows easy set-up and accurate monitoring
of the LFE channel in 5.1 and 6.1 channel
surround sound systems. The LFE channel
on the 7073A can be set to two bandwidths:
19 to 85 Hz or 19 to 120 Hz. If the LFE
signal includes higher frequencies than
120 Hz, they can be monitored by using
the "redirect" function. In this case, frequen-
cies above 85 Hz in the LFE signal are
redirected to the center channel output to
be reproduced by the center channel moni-
tor. The sensitivity of the LFE channel can
easily be set to 0 or +10 dB according to the
monitoring needs.
Two or more subwoofers can be coupled
together via the “SUM OUT” connector if a
higher maximum SPL is required.
To provide a flat bass response in many
different acoustic environments, two ‘Bass
Roll-Off’ switches are included allowing
adjustments to the subwoofer response
in three 2 dB steps. Two phase alignment
switches in the crossover allow compensa-
tion for the phase delay which occurs if the
subwoofer is placed away from the main
speakers or for other phase changes in the
loudspeaker system. Four settings are pro-
vided between 0° and -270°.
Options
Order code Description
1092-400 1/4” jack bypass switch
7000-415 RJ 11 remote Power/
Overload LED
7000-416 RJ 11 remote control
for bypass and +10 dB
LFE functions Figure 3: 7073A harmonic distortion analy-
sis in free field. In half space the SPL will
be 6 dB higher.
Figure 1: The amplifier panel layout of the 7073A subwoofer. Figure 2: 7073A free field frequency response
for different bass roll-off and LFE bandwidth
settings.

7073A
Subsonic filter
(18 dB/octave) below 19 Hz
Upper bandwidth/LFE cutoff 85 Hz/120 Hz selectable
Crossover frequency,
(sub/main channels) 85 Hz
Crossover slopes
Lowpass 36 dB/octave
Highpass 12 dB/octave
Midband rejection >400 Hz ≥ 50 dB
Bass roll-off control operating From 0 to –6 dB @ 20 Hz
range in 2 dB steps
Phase matching control From 0 to 270° @ 85 Hz
in 90° steps
International enquiries:
Genelec, Olvitie 5
FIN-74100, Iisalmi, Finland
Phone [phone]
Fax [phone]
Email [email protected]
In the U.S. please contact
Genelec, Inc., 7 Tech Circle
Natick, MA 01760
Phone [phone]
Fax [phone]
Email [email protected]
AMPLIFIER SECTION
INPUT SECTION
CROSSOVER SECTION
SYSTEM SPECIFICATIONS
7073A
Free field frequency response 19 Hz…85 Hz
(+/- 3 dB) LFE 85/120 Hz
Maximum short term sine wave
SPL output averaged from
30 to 85 Hz, measured in
half space at 1 meter ≥ 124 dB SPL
Maximum peak SPL output with
random pink noise, measured
in half space at 1 meter ≥ 129 dB SPL
Self generated noise level in
free field @ 1 m on axis
(A-weighted) ≤ 20 dB
Harmonic distortion @ 105 dB SPL
at @ 1 m on axis in half space 30 … 85 Hz
2nd ≤ 2 %
3rd ≤ 2 %
Drivers 4 x 305 mm (12”)
Weight 120 kg (265 lbs)
Dimensions
Height 524 mm (20 5/8”)
Width 1440 mm (56 11/16”)*
Depth 558 mm (22”)
* If the subwoofer is flush mounted into a wall or a cabinet, the
recess must be 20 cm (8”) wider than the subwoofer to allow
sufficient clearance for the reflex port situated at the end of the
subwoofer enclosure.
7073A
Short term amplifier output
power (Long term output power
is limited by driver unit
protection circuitry) 1000 W
Amplifier system distortion
at nominal output
THD ≤ 0.05%
Mains voltage 100/200V
or 115/230V
Power consumption (average)
Idle 60 VA
Full output 1000 VA
OUTPUT SECTION
CONTROLS
7073A
Input connector XLR female
pin 1 gnd
pin 2 +
pin 3 –
Input impedance 10 kOhm balanced
Input level for 100 dB SPL
output @ 1 m Variable from +6 to –12 dBu
7073A
Output connector XLR male
pin 1 gnd
pin 2 +
pin 3 –
Remote LED connector (RJ11) Remote LED for
Power/Overload+Bypass
Main monitor Out gain 0 dB
Sum/Link Out gain 0 dB
7073A
Input sensitivity +6 to –12 dBu
Bass roll-off 0/-2 dB/ -4 dB/ -6 dB@ 20 Hz
Phase 0/90/180/270°
LFE/upper bandwidth limit 85 / 120 Hz selectable
Bypass Bypasses the bass
management for the
main channels
LFE sensitivity 0 / +10 dB
Redirect Redirects LFE channel signal
above 85 Hz to center channel
Sum in Changes subwoofer to
Sum in mode
Test tone for phase adjustment 85 Hz
Genelec Document BBA0049001b. Copyright Genelec Oy 12.2002. All data subject to change without prior
www.genelec.com
7073A Data Sheet