LSE Series
Operating Manual
Genelec 7060A, 7070A and 7071A
Active Subwoofers
7060A, 7070A and 7071A Active Subwoofers
General description
Genelec 7060A, 7070A and 7071A are powerful active subwoofers, incorporating all the
amplifi er and crossover electronics needed
for bass management and reproduction in
modern 6.1 or 5.1 channel surround sound
or traditional stereo systems. Their 19 to 120
Hz (±3 dB) (29 to 120 Hz on the 7060A) frequency range, ample sound pressure capability and versatile connections make these
subwoofers ideal companions for Genelec's
active monitoring speakers.
Bass management unit
The built-in bass management unit has six
signal input and output channels (L/C/R Front
and L/C/R Rear), a discrete LFE signal input
and a summed signal output, providing great
fl exibility and easy connection in all monitoring environments.
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 low pass frequency of the LFE input
channel can be set to 85 Hz, 120 Hz or 85 Hz
with "Redirect" function that routes LFE con-
tent above 85 Hz to the front center monitor.
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 fl at bass response in all acous-
tical environments, enabling adjustments of
the subwoofer response in three -2 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°. An 85 Hz test
tone generator is included to help achieve
accurate crossover phase alignment.
Installation
Each subwoofer is supplied with a mains cable
and an operating manual. Once unpacked,
place the subwoofer in a suitable location (f or
more details see the "Positioning" section).
Before connecting the audio signals, ensure
that both the subwoofer and the main monitors are switched off. Check that the voltage
selector switch is set according to your local
mains voltage (subwoofers sold in Europe
have a fi xed 230V setting). Connections are
easier to make if you roll the subwoofer on
its side with the amplifi er panel facing up. Use
this position only for making the connections
and roll the subwoofer back to its normal
upright position before use. Audio connections to the subwoofer are made via balanced
XLR connectors. An unbalanced source can
also be used with a special RCA to XLR
cable; the correct connection for the cable is
shown in Fig. 2. Howev er , we recommend the
use of balanced cables and connectors due
to their better noise immunity . The connectors
are arranged in three rows on the amplifi er
panel (see Fig. 1):
Top row
LFE IN / SUM IN: Use this connector for
the LFE or .1 output channel of a 5.1- or
6.1-channel discrete surround sound source,
or the SUM OUT signal from the "master"
subwoofer in a daisy-chained multiple subwoofer confi guration. Note that the "sub-
woofer out" channel of an analogue matrix
surround decoder (Dolby Surround, Dolby
Figure 2. XLR to RCA connector for
unbalanced operation.
Figure 1. 7070A's amplifier panel, connectors and controls.
Pro Logic) should not be connected to the
"LFE IN" input. See section "Subwoofer in
analogue matrix sound systems".
SUM OUT: Use this output connector when
you want to link another subwoofer to your
system. "SUM OUT" carries an unfi ltered
sum of signals combined from all input channels. See section "Using multiple subwoofers".
Middle row
FRONT L, C, R CHANNELS IN/OUT: Use
these connectors for the Front Left, Center
and Right channels of a surround sound
system or the Left and Right channels of
a Stereo system. Connect line level signal
cables from your signal source to their respective "LEFT IN", "CENTER IN" and "RIGHT IN"
connectors. Then connect the subwoofer to
your main monitors with XLR cables from the
"LEFT OUT", "CENTER OUT" and "RIGHT
OUT" connectors. All "L, C and R OUT" channels are high pass fi ltered with the fi ltering
frquency fi xed at 85 Hz (12 dB/octave).
Bottom row
REAR L, C, R CHANNELS IN/OUT: Use
these connectors for the Rear Left, Center
and Right channels of a surround sound
system. The connection is made in the same
way as with the Front channels. Also these
channels are high pass fi ltered at 85 Hz.
subwoofer and main monitors are ready to be
powered up.
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
is needed to fi nd the optimum placement.
difference between the main monitors and
the subwoofer , and also the bass roll-off rate .
These effects can be compensated by the
use of the controls in the amplifi er unit;
but we recommend that at fi rst you leave
the switches untouched and concentrate on
fi nding the position where the subwoofer
gives the smoothest response, and only then
use the controls to fi ne-tune the balance and
phase alignment between the subwoofer and
the main monitors.
Once all connections have been made, the
Positioning in the room
The placement will affect the phase
To begin with, place the subwoofer slightly
Figure 3. Recommended distances to
the front wall
offset from the center of the front wall.
The recommended distance to the wall is
less than 60 cm / 24" measured from the
subwoofer's driver (See Fig. 3). This position
gives increased acoustic loading (and SPL)
due to the proximity of the front wall and fl oor .
Cancellations from the front wall and fl oor are
also avoided. Front wall cancellation for the
85 Hz high pass fi ltered main speakers
can be eliminated by placing them at least
110 cm / 43" away from the front wall. In
a multichannel system the main monitors
should ideally be positioned symmetrically
and at an equal distance from the listening
position.
If the frequency balance is not right, try
moving the subwoofer slightly to the left or
right so that different room modes are
excited at different levels. Positioning the
subwoofer close to a corner will boost the
bass level at lower frequencies and may
cause asymmetrical spatial imaging. If you
are using two subwoofers, try placing them
asymmetrically relative to the side walls.
Sometimes moving the subwoofers apart
into the front corners helps with problematic
rear wall refl ections and the loss of mutual
coupling is compensated by the bass boost
caused by corner positioning.
Phase Difference: 0°
Phase Difference: 90°
Table 1. Suggested Bass Roll-Off settings
85 Hz
Phase Difference: 180°
85 Hz
Figure 4. The effect of phase difference between the subwoofer and the main monitors
Although the 7060A, 7070A and 7071A
subwoofers are magnetically shielded, they
may cause some picture distortion if placed
near very sensitive video monitors or computer displays. Move the subwoofer further
away or try turning the driver side of the
subwoofer away from the screen.
Minimum clearances to walls
85 Hz
Phase Difference: 270°
85 Hz
fi er cooling. This can be done by making the
recess 7,5 centimeters (3") wider than the
subwoofer . Place the subwoof er into the right
end of the recess with the driver side facing
the room. This leaves suffi cient 7,5 centime-
ters (3") of free space on the refl ex port side.
The height and depth of the recess should
not be any bigger than those needed to fi t
the subwoofer fl ush with the wall surface.
or other objects
The power amplifi ers are attached to the
lower part of the aluminium grille, which functions as a heatsink. Do not cov er the g rille or
place the subwoofer so that there is less than
10 centimeters (4") of free space in front of
the grille.
Make sure that the space underneath the
subwoofer is clear from obstructions. Thick
carpets may block the ventilation clearance
needed for cooling the electronics' box.
The refl ex port side (opposite of the ampli-
fi er panel side) should always have a clearance of at least 7,5 centimeters (3") to any
objects to ensure proper functioning of the
refl ex port.
Flush mounting the subwoofer
If the subwoofer is fl ush mounted into a wall
or a cabinet, it is important to ensure unrestricted airfl ow from the refl ex port and ampli-
Setting the input sensitivity
The subwoofer requires input sensitivity
alignment to the source to obtain a correctly
balanced system. The input sensitivity control is located on the amplifi er panel of the
subwoofer. An input voltage of -6 dBu with a
-6 dBu input sensitivity setting will produce
100 dB SPL @ 1m in free fi eld. To obtain a
110 dB SPL output an input voltage of +10
dBu is required when the input sensitivity is
set to 0 dBu.
Setting the Bass Roll-Off
switches
The acoustic response of the subwoofer may
have to be matched to the characteristics of
the room and the positioning in which it will
be used. To adjust the subwoofer to match
these characteristics use the ''Bass Roll-Off'
control switches located on the amplifi er
Figure 5. Flush mounting the subwoofer.
Note the clearance needed on the reflex
port side.
panel. Table 1 provides some suggestions
for the "Bass Roll-Off" switch settings. When
both roll-off switches are set to "OFF", a fl at
anechoic response is obtained.
Setting the phase control
Incorrect phase alignment between main
monitors and subwoofer causes a drop in the
frequency response of the whole system at
the crossover frequency. The graphs above
(Fig. 4) show the eff ect of phase difference to
the frequency response.
The phase difference between the main
monitors and subwoofer at the listening position is dependent upon the position of the
subwoofer, so the phase adjustment should
be done only after the preferred position
is found. Acoustic measuring equipment is
required for accurate system alignment. If
this equipment is not available, the following
coarse phase matching can be applied.
Coarse phase adjustment
method
Genelec 7060A, 7070A and 7071A subwoofers are equipped with a built-in 85 Hz frequency test tone generator for easy phase
alignment. The test tone generator is connected to the subwoofer's "FRONT CENTER
OUT" channel only. In a stereo system it is
Table 2. Recommended subwoofer/main monitor combinations.
consists of a LED in a compact case and
a RJ11 cable to connect the case and the
"REMOTE" RJ11 connector on the amplifi er
panel.
Subwoofer bypass control
A bypass control feature is included in the
subwoofer circuits so that the effect of the
subwoofer on the whole monitor system can
be determined. With the bypass switch on,
the high pass fi lters for the main monitors are
overridden and the system behaves as if the
subwoofer was not connected. The bypass
function has no effect on the LFE input. Two
different bypass remote controllers are available as optional equipment: 1092-400 switch
that can be connected to a 1/4" jack connector on the amplifi er panel and 7000-416 that
connects to the "REMOTE" RJ11 connector.
The 7000-416 option also includes remote
control of the "LFE +10 dB" function and a
link for the 7000-415 remote LED option.
necessary to temporarily connect either of
the channels to this output.
Power up the system and set the DIP
switches 3 (SUM IN MODE) and 4 (LFE +10
dB) on the fi rst switch group to "ON" Now you
should hear an 85 Hz test signal from the
subwoofer and the main monitor connected
to the center channel output.
Toggle the -180° phase switch
(DIP 4 on the second switch
group) on and off, and set
it to the position which gives
the lowest sound level at the
listening position.
Next toggle the -90° phase
switch (DIP 3) on and off, and
again set it to the position which
gives the lowest sound level.
Finally , set the -180° phase switch
(DIP 4) to the opposite setting
and deactivate the test signal.
Phase correction method with
test equipment
The following procedure matches the phase
between the subwoofer and the main monitors using a frequency analyser and a pink
noise generator. Connect a high grade measuring microphone to the analyser and feed
pink noise into the "CENTER IN" input of
the subwoofer. The subwoofer's bass management system will direct the frequencies
above 85 Hz to the center main monitor while
the subwoofer reproduces the frequencies
below 85 Hz.
Position the microphone at the listening
position and adjust the input sensitivity of
the subwoofer until frequencies below and
above 85 Hz are reproduced at equal level.
Then adjust the phase control switches for
the maximum dip of at least -6 dB at the
crossover frequency (85 Hz).
Change the -180° switch to the opposite
setting. The phase should now be set
correctly and the frequency analyser should
show a smooth response around 85 Hz.
Overload indicators
The mode indicator LED on the amplifi er
panel will turn from green to yellow to indicate clipping and then to red to indicate that
the protection circuit has activated. If this
occurs frequently, reduce the input level to
the subwoofer until the LED remains green.
If the LED on the amplifi er panel is not
easily visible, the optional Remote LED Kit
can be used to bring it into view. The kit
Subwoofer in analogue matrix
surround sound systems.
When using Genelec 7060A, 7070A or 7171A
subwoofers in a consumer analogue matrix
surround sound system, such as Dolby Surround, Dolby Pro-Logic or Pro-Logic II or a
professional matrix decoder such as a Dolby
SDU-4, route the front channels through the
subwoofer so that the output of the subwoofer is matched to the rest of the system
and select "Large" setting for the front speakers on the decoder. If there is a subwoofer
channel output on the decoder it should NOT
be connected to the subwoofer's "LFE IN"
input since the processing within an analogue decoder will confl ict with the fi ltering in
the subwoofer. Connecting the rear channels
to the subwoofer is optional since the rear
channels from most matrix decoders are
band limited down to 100 Hz.
Monitoring the LFE channel
in digital discrete surround
sound systems
Some digital surround sound systems use
a discrete Low Frequency Effects channel
which should be connected to the "LFE IN"
input on the amplifi er panel. This enables the
subwoofer to correctly reproduce all the bass
information in the mix.
The LFE channel on the 7060A, 7070A
and 7071A can be set to two frequency
ranges: 19 to 85 Hz or 19 to 120 Hz by
using the "LFE BANDWIDTH" switch. If the
LFE signal includes higher frequencies than
120 Hz, they can be monitored by using the
"Redirect" function: Set "LFE BANDWIDTH"
switch to "85" and the "REDIRECT" switch
to "ON". Now the subwoofer reproduces
LFE frequencies up to 85 Hz and reroutes
all higher LFE content to the front center
channel. This is the most fl exible setting
for LFE signal management, as it ensures
that all LFE content can be monitored in all
situations and encoding formats. Note that
the "Redirect" function is not enabled when
the "LFE BANDWIDTH" switch is set to 120
Hz.
Typical applications of different
LFE bandwidth settings
As stated above, using the 85 Hz LFE bandwidth setting with "Redirect" function is the
most universal confi guration for LFE moni-
toring. However, there are situations when
the band-limited LFE settings serve a defi nite
purpose.
Limiting the LFE bandwidth to 85 Hz without using the "Redirect" function can be
used to simulate the effect of some consumer decoders that do not replay information above 80 Hz on the LFE channel when
the bass management is used. Checking the
multichannel mix with this setting on lets you
know how it translates in systems with this
limitation.
The 120 Hz LFE bandwidth setting complies with the replay systems of movie theaters and cinemas. 35 mm movie soundtracks
use the LFE channel to reproduce a bandwidth of 20 - 120 Hz through dedicated subwoofers. In this case the LFE and main channel bandwidths overlap between 85 and 120
Hz, which may create unwanted acoustical
summing if the same signal is present in
both channels. To avoid this, the LFE content should be kept completely different (decorrelated) from the low frequency content of
the main channels when mixing music and
sound effects for fi lm release.
Using the LFE +10 dB function
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 7060A,
7070A and 7071A subwoofers 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's
fi rst switch group to "ON" or by using the
remote control. A yellow LED indicates that
the function has been activated.
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
DVD-Audio (MLP), SACD (DSD) etc.
• When monitoring a decoded Dolby
Digital or DTS soundtrack. The decoder
will automatically provide +10 dB
LFE gain.
Using multiple subwoofers
Genelec 7060A, 7070A and 7071A subwoofers are equipped with a "SUM OUT" connector to provide an easy way of coupling two or
more subwoofers together in high SPL applications. Table 2 shows the recommended
confi gurations with different Genelec moni-
tors. Connect an XLR cable from the "SUM
OUT" connector of the "master" subwoofer
to which the main monitor channels are connected, to the "LFE IN / SUM IN" connector
of the other, "slave" subwoofer and turn the
"SUM IN MODE" dip switch on the "slave"
subwoofer to "ON".
When two subwoofers connected in this
way are positioned close to one another , bass
level increases by 6 dB. Three subwoofers
give an SPL increase of 9,5 dB and four
subwoofers 12 dB compared to a single
subwoofer. Adjust the sensitivity control of all
subwoofers in the group to match the SPL
level of the main monitor system.
Phase and Bass Roll-Off adjustments
should be done individually for each
subwoofer in the chain, especially if they
are not placed close together. To check the
phase alignment for the "master" subwoofer
switch off the "slave" subw oofer and follow the
instructions given in the previous sections.
To adjust the phase alignment of the
"slave" subwoofer, you need to switch off
the "master" subwoofer, connect a signal
cable from the "slave" subwoofer's "FRONT
CENTER OUT" connector to the center
channel monitor and switch the "SUM IN
MODE" switch to "OFF". This effectively
changes the "slave" to "master" mode and the
phase adjustment can be carried out. Return
the connections and "SUM IN MODE" setting
on the "slave" subwoofer back to the "SUM
IN" mode after completing the adjustment.
Safety considerations
The LSE series subwoofers have 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:
• Do not expose the subwoofer to water
or moisture. Do not place any objects
fi lled with liquid, such as vases on
the subwoofer or near it.
• Servicing and adjustment must only
be performed by qualifi ed
service personnel.
• Opening the amplifi er panel is
strictly prohibited except by
qualifi ed service personnel.
• Always use a mains power connection
with protective earth. Failing to do
this may lead to personal injury.
Warning!
This equipment 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
amplifi er unit. Any maintenance of the unit
must only be performed by qualifi ed service
personnel.
Guarantee
This product is supplied with a ONE year
guarantee against manufacturing faults or
defects that might affect the performance of
the unit. Refer to supplier for full sales and
guarantee terms.
Accessories
1092-400 1/4” jack "Bypass" switch
7000-415 RJ11 remote Power/Overload
indicator LED
7000-416 RJ11 remote control for
"Bypass" and "+10 dB LFE"
functions
Figure 9. The free field frequency response
of the 7060A subwoofer at different Bass
Roll-Off settings
Figure 10. The free field frequency
response of 7070A and 7071A subwoofers
at different Bass Roll-Off settings.
Figure 6. 1092-400 "Bypass" switch
Figure 7. 7000-415 Remote Power/OVL LED
Figure 8. 7000-416 Remote control switch
for "Bypass" and "+10 dB LFE" functions
Figure 11. The curves above show the
harmonic distortion analysis of the 7060A in
free field. In half space the SPL will be 6 dB
higher.
Figure 12. The curves above show the
harmonic distortion analysis of the 7070A
and 7071A in free field. In half space the SPL
will be 6 dB higher.
7060A, 7070A and 7071A Operating Manual
SYSTEM SPECIFICATIONS
7060A 7070A 7071A
Free fi eld frequency response 29 Hz…85 Hz 19 Hz…85 Hz 19 Hz…85 Hz
(+/- 3 dB) LFE 85/120 Hz LFE 85/120 Hz LFE 85/120 Hz
Maximum short term sine wave
SPL output averaged from
30 to 85 Hz, measured in
half space at 1 meter ≥ 108 dB SPL ≥ 112 dB SPL ≥ 118 dB SPL
Maximum peak SPL output with
random pink noise, measured
in half space at 1 meter ≥ 113 dB SPL ≥ 117 dB SPL ≥ 123 dB SPL
Self generated noise level in
free fi eld @ 1 m on axis
(A-weighted) ≤ 15 dB
Harmonic distortion @ 95 dB SPL @ 95 dB SPL @ 100 dB SPL
at @ 1 m on axis in half space 30 … 85 Hz 30 … 85 Hz 30 … 85 Hz
2nd ≤ 2 % ≤ 2 % ≤ 2 %
3rd ≤ 2 % ≤ 2 % ≤ 2 %
Driver, magnetically shielded 250 mm (10”) 305 mm (12”) 2 x 305 mm (12”)
Weight 26 kg (57 lbs) 50 kg (110 lbs) 81 kg (178 lbs)
Dimensions
Height 527 mm (20 3/4”) 625 mm (24 5/8”) 755 mm (29 3/4”)
Width 462 mm (18 3/16”) 555 mm (21 7/8”) 803 mm (31 5/8”)
Depth 360 mm (14 3/16”) 490 mm (19 5/16”) 490 mm (19 5/16”)
CROSSOVER SECTION
7060A 7070A 7071A
Subsonic fi lter
(18 dB/octave) below 29 Hz 19 Hz 19 Hz
Crossover frequency,
(sub/main channels) 85 Hz
LFE cutoff Hz 85 Hz/120 Hz selectable
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 From 0 to –6 dB From 0 to –6 dB
range in 2 dB steps @ 30 Hz @ 20 Hz @ 20 Hz
Phase matching control From 0 to 270
in 90° steps @ 85 Hz
AMPLIFIER SECTION
7060A 7070A 7071A
Short term amplifi er output
power (Long term output power
is limited by driver unit
protection circuitry) 120 W 250 W 500 W
Amplifi er system distortion
at nominal output
THD ≤ 0.05%
Mains voltage 230 V, 115/230V or 100/200V
according to region
Power consumption (average)
Idle 15VA 15 VA 30 VA
Full output 150 V A 250 VA 500 VA
INPUT SECTION
7060A 7070A 7071A
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 +12 to –6 dBu
OUTPUT SECTION
7060A 7070A 7071A
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 Out gain 0 dB
Genelec Document D0032R001. Copyright Genelec Oy 5.2002. All data subject to change without prior notice
7060A 7070A 7071A
Input sensitivity +12 to –6 dBu for 100dB @ 1 m
Bypass Bypasses the bass management for the main channels
LFE bandwidth 85 / 120 Hz
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
Bass Roll-Off 0/-2 dB/ -4 dB/ -6 dB 0/-2 dB/ -4 dB/ -6 dB 0/-2 dB/ -4 dB/ -6
@ 30 Hz @ 20 Hz dB @ 20 Hz
Phase 0/90/180/270° @ 85 Hz
International enquiries:
Genelec, Olvitie 5
FIN-74100, Iisalmi, Finland
Phone +358 17 83 881
Fax +358 17 812 267
Email genelec@genelec.com
CONTROLS
In the U.S. please contact
Genelec, Inc., 7 Tech Circle
Natick, MA 01760
Phone +1 508 652 0900
Fax +1 508 652 0909
Email genelec.usa@genelec.com
www.genelec.com
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