Genelec 7050A User Manual

LSE Series

Operating Manual

Genelec 7050A
Active Subwoofer

Genelec 7050A Active Subwoofer

General description

Genelec 7050A active subwoofer is a very

compact low frequency loudspeaker,

designed to extend the bass reproduction

of Genelec 1029A, 2029A or 2029B active

monitors in stereo applications. Adding the

7050A to a 1029/2029 system creates a com-

pact neareld monitoring system capable of

a at frequency response from 38 Hz to 20

kHz (± 3 dB).

Driver

The 7050A contains a single 200 mm (8”)

magnetically shielded low frequency driver,

housed in Genelec Laminar Spiral Enclosure

TM

(LSETM).

Crossover

The active crossover contained within the

amplier unit lters the input signals. This

accurately rejects the higher frequencies that

the monitors reproduce, and allows the lower

frequencies to pass. The sensitivity can be

attenuated from 0 dB to -18 dB for easy level

matching with the main loudspeakers. Due to

the input sensitivity of the 7050A subwoofer

it can only be used with Genelec 1029A,

2029A and 2029B active monitors.

Amplifier

The amplier produces 70 W of output power,

with very low THD and IM distortion. Driver

overload protection and power-on signal

muting is included in the amplier circuitry.

The amplier also incorporates thermal over-

load and short circuit protection.

Installation

The subwoofer is supplied with a mains

cable, signal cables to go between the

main monitors and the subwoofer and this

operating manual. Once unpacked inspect

the subwoofer to ensure that it has not been

damaged in transport. Check that the mains

voltage selector switch is set to your local

mains voltage (Subwoofers sold in Europe

have a xed 230 V setting). Ensure that both

the subwoofer and the main monitors are

switched off before making any connections.

Audio connections to the subwoofer are

made with balanced 1/4" Jack / XLR cables

supplied with the subwoofer. Signals from the

source are fed to the XLR input connectors

of the 1029A/2029A/2029B monitors. The

7050A gets its input signal from the 1/4"

Jack "SUB OUT" output connectors of the the

1029A/2029A/2029B monitors (see Figure 1).

When used in conjunction with the 7050A the

"BASS ROLL-OFF" dip switch (switch 2) on

the 1029A/2029A/2029B should be switched

to position "ON". Once all connections have

been made, the subwoofer and main monitors

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 subwoof-

er's location can make a marked difference

in the frequency balance and often a patient

and methodical experimentation and testing

is needed to nd the optimum placement. The

placement will affect the phase difference

between the main monitors and the subwoofer

and the bass roll-off rate.

First place the subwoofer slightly offset

from the center of the front wall. The

recommended distance to the wall is less than

90 cm / 36" measured from the subwoofer's

driver. This position gives increased acoustic

loading (and SPL) due to the proximity of the

front wall and oor. Cancellations from the

front wall and oor are also avoided. Front

wall cancellation for the 85 Hz high pass

ltered main speakers can be eliminated by

placing them at least 110 cm / 43" away from

the front wall (see Figure 2).

If the frequency balance does not seem

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

Figure 1. Connecting the 7050A to a pair of G enelec 1029A/2029A/2029B active monitors

Figure 2. Recommended distances to
front wall

the bass level at lower frequencies and may

cause asymmetrical spatial imaging.

Although the 7050A is magnetically

shielded, it may cause colour distortion if

placed near to 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

or other objects

Do not cover the driver side of the subwoofer

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 amplier unit.

The reex port side (opposite of the con-

nector panel side) should always have a

clearance of at least 7,5 centimeters (3") to

any objects to ensure proper functioning of

the reex port.

Flush mounting the subwoofer

If the subwoofer is ush mounted into a wall

or a cabinet, it is important to ensure ampli-

er cooling and unrestricted airow from the

reex port. This can be done by making the

recess 7,5 centimeters (3") wider than the

subwoofer. Place the subwoofer into the right

end of the recess with the driver side facing

the room. This leaves sufcient 7,5 centime-

ters (3") of free space on the reex port side.

The height and depth of the recess should

not be any bigger than what is needed to t

the subwoofer ush with the wall surface.

Setting the input sensitivity

The 7050A is set to the same sensitivity

as the 1029A/2029A/2029B monitors in free

eld conditions. However, when placed near

reecting surfaces the sensitivity typically

needs to be attenuated due to increased

room loading. A typical starting point would

be -4 dB. This is achieved by adjusting the

rotary level control on the amplier plate. The

use of proper measuring equipment together

with careful listening is highly recommended.

The maximum attenuation is -18 dB.

Safety considerations

Genelec 7050A subwoofer has been designed

in accordance with international safety stand-

ards. 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 lled with liquid,

such as vases on the

subwoofer or near it.

• Servicing and adjustment must

only be performed by

qualied service personnel.

• Opening the amplier unit is strictly

prohibited except by quali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 85dB, which may

cause permanent hearing damage.

Maintenance

No user serviceable parts are inside the

amplier unit. Any maintenance of the unit

must only be performed by qualied service

personnel.

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.

7050A Operating Manual

SYSTEM SPECIFICATIONS

7050A

Free eld frequency response
(+/- 3 dB) 38 Hz…85 Hz

Maximum shor t term sine wave
SPL output averaged from
45 to 85 Hz, measured in
half space at 1 meter ≥ 100 dB SPL

Maximum peak SPL output with
random pink noise, measured
in half space at 1 meter ≥ 105 dB SPL

Self generated noise level in
free eld @ 1 m on axis
(a-weighted) ≤ 15 dB

Harmonic distortion @ 95 dB SPL
at @ 1 m on axis in half space 40 … 85 Hz
2nd ≤ 3 %
3rd ≤ 2 %

Driver, magnetically shielded 200 mm (8”)

Weight 15 kg (33 lbs)

Dimensions
Height 410 mm (16 1/8”)
Width 350 mm (13 3/4”)
Depth 314 mm (12 3/8”)

CROSSOVER SECTION

7050A

Subsonic lter
(18 dB/octave) below 38 Hz

Crossover frequency,
(sub/main channels) 85 Hz

AMPLIFIER SECTION

7050A

Short ter m amplier output
power (Long term output power
is limited by dr iver unit
protection circuitry) 70 W

Amplier system distortion
at nominal output
THD ≤ 0.08%

Mains voltage 230 V, 115/230 V or 100/200V

according to region

Power consumption (average)
Idle 10 VA
Full output 100 VA

INPUT SECTION

7050A

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 0…–18 dB (referenced to 1029/2029 output)

Genelec Docu ment D0045R001. Copyright Ge nelec Oy 5.2002. All data s ubject to change witho ut prior notice

CONTROLS

7050A

Input sensitivity 0…–18 dB

Inter national e nquiries:

Genele c, Olvitie 5

FIN-74 100, Iisal mi, Finlan d

Phone [phone]

Fax [phone]

Email genele [e-mail]

In the U.S. please c ontact

Genele c, Inc., 7 Tech Ci rcle

Natick, MA 01760

Phone [phone]

Fax [phone]

Email genele [e-mail]

www.genelec.com