Genelec 1037-C Owners manual

1037C and
1038B

Operating Manual

Genelec 1037C and 1038B
Tri-amplified Monitoring Systems

Genelec 1037C and 1038B Tri-amplified Monitoring Systems

System

The Genelec 1037C and 1038B are three-

way active monitoring systems including

drivers, multiple power amplifiers and active

crossovers. The systems are designed for

medium sized control rooms and suited for

music recording studios, film and video post-

production and general broadcasting moni-

toring as well as for mastering suites. They

are designed to perform well both as free-

standing monitors or flush mounted into the

control room wall.

The unique Directivity Control Waveguide™

(DCW™) Technology developed by Genelec

provides excellent stereo imaging and fre-

quency balance even in difficult acoustic

environments. The fast, low distortion ampli-

fiers are capable of driving the stereo system

to peak output levels in excess of 124 dB

SPL at 2 m (1038B) or 126 dB SPL at 1.7

m (1037C) with program material. Versatile

crossover controls allow for precise matching

of the speaker system to different acoustic

conditions.

Drivers and cabinet

construction

On the 1038B the low frequencies are repro-

duced by an 385 mm (15”) bass driver loaded

with a 110 liter vented box. The -3dB point

is 33 Hz and the low frequency response

extends down to 29 Hz (-6 dB). The 1037C

features a 305 mm (12”) bass driver in a 65

liter vented box with the -3 dB point at 35 Hz

and -6 dB at 32 Hz.

Both models share the same midrange

and high frequency driver layout with a pro-

prietary 130 mm (5”) direct radiating cone

for the MF and a 25 mm (1”) metal dome for

the HF loaded by proprietary Directivity Con-

trol Waveguide. All drivers are magnetically

shielded.

Crossover filters

The active crossover network consists of

three parallel bandpass filters. The crosso-

ver frequencies are 410 Hz and 3.0 kHz

on the 1038B and 420 Hz and 3.2 kHz on

the 1037C. Bass, midrange and treble level

controls with 1 dB steps are included in the

crossover to obtain uniform frequency bal-

ance in different acoustic conditions. The low

frequency Tilt and Roll-off controls both have

four 2 dB steps to allow refined low frequency

response tailoring. The crossover network is

driven by an active balanced input stage, fed

by a 3 pin XLR connector. Variable input sen-

sitivity allows for accurate level matching to

console output section.

Amplifiers

The bass, midrange and treble amplifiers

on the 1038B produce 400 W, 120 W and

120 W of short term power. The 1037C has a

180 W amplifier for the low frequency driver

and 120 W amplifiers each for midrange and

treble drivers. The amplifiers are designed

to operate at very low THD and IM distortion

values and incorporate special circuitry for

driver overload protection and amplifier ther-

mal protection.

Installation

Each monitor is supplied with an integrated

amplifier unit, a mains cable and an operat-

ing manual. Once unpacked place the loud-

speaker in its required listening position,

taking note of the line of the listening axis

(see Figure 1).

Sufficient cooling for the amplifier must

be ensured. The minimum clearance for the

amplifier is 10 centimeters (4”) to any object.

The space adjacent to the amplifier must

either be ventilated or sufficiently large to

dissipate heat so that the ambient tempera-

ture does not rise above 35 degrees Celsius

(95°F). If the speaker is flush mounted into

the wall structure, the amplifier can be placed

separately into an equipment rack using an

Speaker mounting

W1

H1

> 1

m

W2

H2

ACOUSTICAL
AXIS

> 1

m

-2

-4 dB

-6

-8

BASS
ROLL-OFF

INPUT SENSITIVITY

SIGNAL INPU

T

INPUTSENSITIVITY
REQUIREDFOR
100dBSPL@1m.
REFERT

O
OPERATINGMANUAL
FORMAXIMUM SPL.

PIN1 =GROUND
PIN2 =+INPUT
PIN3 =-INPUT

˜

MAINSINPUT
50/ 60Hz
300Watts
115/

230V

ON

MAINS
VOL

TAGE

SELECTOR

2

3

-4+4

1

dBu

+6

-6

+2

0

-2

ENSURETHAT THECORRECT VOLTAGEIS SELECTEDBEFORE
CONNECTINGTO THEMAINS SUPPLY.

THISEQUIPMENT

ISCAPABLE OFPRODUCING SOUND

PRESSURELEVELS

INEXCESS OF 85dBWHICH MAYCAUSE

PERMANENTHEARING DAMAGE.

NEVEROPERATE THISEQUIPMENT WITHOUT

APROPER

EARTHEDMAINS CONNECTION.

DONOT EXPOSETO WATEROR MOISTURE.

SERIAL
NUMBER

ITIS FORBIDDENTO UNDOANY SCREWS ONTHIS EQUIPMENT.
SERVICINGAND ADJUSTMENTMUST ONLYB

ECARRIED OUT

BYQUALIFIED SERVICEPERSONNEL.

ELECTRIC SHOCK HAZARD!

WARNING

MADEIN FINLAND

www.genelec.co

m

1037CTRI-AMPLIFIED MONITORING SYSTEM

GENELECR

f

20Hz 100Hz

-4

-6

-8

0

-2

ALLOFF

MID
LEVEL

TREBLE
LEVEL

BASS
LEVEL

BASS
TILT

-1

-2

-3

-4 dB

-5

-6
MUTE

-2

-4 dB

-6

-8

OFF ON

OFF O

N

OFF O

N

-1

-2

-3

-4 dB

-5

-6
MUTE

OFF ON

-1

-2

-3

-4 dB

-5

-6
MUTE

OFF ON

FORACCURATE OPERATIONONLY ONE

SWITCHIN EACH

TONECONTROL GROUP

SHOULDBE ON ATA TIME.

0

-1

-2

-3

-4

-5

-6

20Hz 400Hz 3kHz 20kHz

ALLOFF

0

20Hz 250Hz

dB

-6

-8

-4

-2

dB

FORA FLATFREE FIELD RESPONSESET ALL

TONECONTROLS TO OFF.

BASS

dB

MI

D

LEVELCONTROLS

CALPOSITION
ALL

TONECONTROLS : OFF

INPUTSENSITIVITY

:-6dBu

TREBLE

USING THETONE CONTROLS

REFERTO THE OPERATINGMANUAL FOR

SUGGESTED

TONECONTROL SETTINGS.

TREBLE,

MIDRANGE

AND BASS

LEVEL

SWITCHES

BASS TILT

AND

ROLL-OFF

SWITCHES

INPUT

SENSITIVITY

ADJUSTMENT

SIGNAL INPUT

CONNECTOR

MAINS VOLTAGE

SELECTOR,

MAINS
CONNECTOR
AND SWITCH

position

Bass

roll-off

Bass tilt Bass

level

Midrange

level

Treble

level

Free anechoic response None None None None None

Free standing in a
damped room

Free standing in a
reverberant room

None -2 dB None None None

None -2 dB -2 dB None None

In a corner -2 dB -2 dB -2 dB None None

Soffit mounted in a control
room wall

None None -4 dB None None

Table 1. Suggested ton e control setting s for different acoustic environments

H1 mm (in) W1 mm (in) H2 mm (in) W2 mm (in)

1037C 540 (21

1038B 650 (25

1

/4") 200 (7 7/8") 230 (9 1/16") 170 (6 11/16")

5

/8") 240 (9 1/2") 275 (10 7/8") 210 (8 1/4")

Figure 1. Location of the acoustic axis Figure 2. Amplifier panel layout of the 1037C.

optional rack mount kit (see sections ‘Flush

mounting’ and ‘Accessories’).

Before connecting up, ensure that the

mains switch is off (see Figure 2). Check that

the mains voltage selector is correctly set to

your local voltage. Audio input is made via a

10kOhm balanced XLR connector, but unbal-

anced leads may be used as long as pin 3 is

grounded to pin 1 of the XLR. Once connec-

tion has been made, the speakers are ready

to be powered-up.

Setting the input sensitivity

Adjustment of the input sensitivity of each

speaker can be made to match the output of

the mixing console or other source, by use of

the input sensitivity control on the rear panel

(see Figure 2). A small screwdriver is needed

for the adjustment. The manufacturer default

setting for this control is -6 dBu (fully clock-

wise) which gives an SPL of 100 dB @1m

with -6 dBu input level. To get the full output

level of 120 dB SPL from the 1038B an input

level of +14 dBu is needed at this setting.

Respectively, the full output level of the 1037C

is reached at an input level of +10 dBu.

The acoustic response of the system may

also have to be adjusted to match the acous-

Setting tone controls

tic environment. The adjustment is done by

setting the five tone control switch groups

degrees in the appropriate direction and

remount the screws.

‘bass tilt’, ‘bass roll-off ’, ‘bass level’, ‘mid

level’ and ‘treble level’ on the rear panel of

the amplifier. The manufacturer’s default set-

tings for these controls are ‘All Off ’ to give

a flat anechoic response. See Table 1 for

suggested tone control settings in differing

acoustic environments. Figures 7 and 8 show

the effect of the controls on the anechoic

response. Always start adjustment by setting

all switches to the ‘OFF’ position. Then set

only one switch per group to the ‘ON’ posi-

tion to select the response curve required. If

more than one switch is set to ‘ON’ (within

one switch group) the attenuation value is no

longer accurate.

The 1037C and 1038B can be used flush

mounted into the control room wall, which

offers some acoustical benefits. No cabinet

edge diffraction will occur, resulting in an

improved response, especially at midrange

frequencies. Low frequency reflections from

the wall behind the speaker can be avoided,

which improves the low frequency response

and efficiency and allows the speaker to work

in half space conditions. In terms of installa-

tion and orientation, the speaker’s acoustical

axis (See Figure 1.) should also point directly

to the listening position. The speaker should

Flush mounting

be vertically aimed so that the acoustical axis

Vertical / horizontal mounting

The speakers are delivered either for verti-

cal or horizontal mounting. In the horizontal

mounting position the bass drivers should

point inwards to obtain better low frequency

coupling. If the speaker positioning needs to

be changed, the DCW plate can be rotated

so that the midrange driver remains always

located at the bottom of the DCW. Remove

the four corner screws of the DCW and pull

the plate carefully out without stressing the

wires and the gasket. Rotate the plate 90

of the two speakers meet midway between

the standing and seated listening position

(1.4m - 4’7” from the floor). In the horizon-

tal plane the speaker should be positioned

according to the standard stereophonic (60

degrees between left-right channels) or mul-

tichannel (ITU-R BS.775-1) placement rec-

ommendation.

The ceiling, side walls and especially the

rear wall should be acoustically absorbent

at low frequencies. The wall in which the

speakers are mounted should have a high

Figure 3: Flush mounting the speaker in a

HEAVY WOODEN WALL

ABSORBING

MATERIAL

VIBRATION
ISOLATORS
f ~ 2-8 Hz

AMPLIFIER

REMOVED

FROM ENCLOSURE

CONCRETE WALL

SAND

BAGS

VIBRATION
ISOLATORS
f ~ 2-8 Hz

AMPLIFIER

REMOVED

FROM ENCLOSURE

CONCRETE

STRUCTURE

MULTI-LAYERED WALL
(WOOD, CONCRETE,
BRICKS)

VIBRATION
ISOLATORS
f ~ 2-8 Hz

AMPLIFIER

REMOVED
FROM
ENCLOSURE

FACING PANEL

FIXED TO THE WALL

(50-100 mm / 2-4")

RUBBER GASKET

(5-10 mm / ¼-½")

SPEAKER

WALL

wall constructed of wood

Figure 4: Flush mounting the speaker in a
wall constructed of concrete

Figure 5: Flush mounting the speaker in
a wall constructed of a combination of
materials.

acoustical mass to properly implement a low

frequency radiation condition into half space

and be angled so that the speakers are cor-

rectly aimed. However, the speakers should

not be mounted too high as this increases

the required vertical tilt of the speaker (maxi-

mum tilt angle < 20 degrees) and reduces the

optimum listening area. Great care should be

taken over how the speaker is mounted into

the wall. Note the following:

A space 50 to 100 mm (2 to 4”) wide can

be left around the speaker. Cover the space

around the speaker with a facing panel that

should be fixed to the wall. Leave a gap of

about 5 to 10 mm (¼ to ½”) between the

speaker and the panel. Fill this gap with a

soft rubber gasket to allow for possible cabi-

net movement (see Figure 6).

Ensure that the speaker cables can reach

the rear of the speaker cabinets.

Regardless of the type of front wall con-

str uction the speaker cabinet should be

mounted on vibration isolators, with a reso-

nant frequency between 2 to 8 Hz, to prevent

vibrations from being transmitted to the wall

and impairing the low frequency perform-

ance.

If a heavy wooden front wall construction

is used, the space around the cabinet should

be filled with absorbent mineral wool or foam

plastic. The wooden wall structure must be

heavily braced to achieve sufficiently high

mass and rigidity (see Figure 3).

In a solid wall (e.g. concrete) structure,

the space around the cabinet should be filled

with either absorbent mineral wool or sand

bags (see Figure 4).

The wall can also be constructed of a com-

bination of materials to achieve high acousti-

cal structural mass that will disable low fre-

quency sound propagation and provide high

LF sound isolation (see Figure 5). Acoustic

consultants will be able to provide details and

design these structures.

Ensure that the cabinet is flush with the sur-

face of the wall. Discontinuities in the speaker

mounting wall will cause diffraction, which

leads to inferior frequency response and

stereo imaging. So, if a decorative cloth frame

is used to cover the wall, make sure that the

edges adjacent to the speaker are less than

20 mm (3/4”) deep. The cloth must be very thin

Tricot or an acoustically transparent material

otherwise the high frequency response of the

system will be adversely affected. Genelec

approved cloth grilles are available.

Overload indicators

The speaker is provided with two indicator

LED’s marked ‘CLIP PROTECT (FAULT)’ and

‘READY’ (1038B) or ‘ON’ and ‘OVL’ (1037C).

The green LED indicates that the speaker is

ready for use. The red LED indicates that the

amplifier is overloaded or the driver protec-

tion circuit is activated. In both cases reduce

the signal level so that the LED stops blink-

Figure 6: Covering the gap between the
wall and the speaker cabinet.

ing. If the red LED stays on constantly it indi-

cates that the amplifier thermal protection is

activated. Let the amplifier cool down and

check that the ventilation around the ampli-

fier is not blocked. There should be a clear-

ance of more than 100 mm (4”) between the

amplifier face panel and any solid surface at

the back.

Maintenance

No user serviceable parts are to be found

within the amplifier unit. Any maintenance or

repair should only be undertaken by quali-

fied service personnel. Ensure that if fuse

replacement is required, only fuses of the

same voltage and current rating are used.

Remember to disconnect the power supply

by removal of the mains cable, before fuse

replacement.

Figure 7: The curves above show the effect of t he ‘bass’, ‘mid’ and

80

85

90

20

20k

50

100

200 500

1k 2k

5k

10k

dBr

Hz

80

85

90

80

85

90

BASS LEVEL

BASS ROLL-OFF

MIDRANGE LEVEL

BASS TILT

TREBLE LEVEL

AUDIO PRECISION 1038BANEC vs 16 APR 02LEVEL(dBr) FREQ(Hz)

BASS TILT

BASS LEVEL

TREBLE LEVEL

BASS ROLL-OFF

MIDRANGE LEVEL

80

85

90

20

20k

50

100

200 500

1k 2k

5k

10k

dBr

Hz

80

85

90

80

85

90

AUDIO PRECISION 1037CANEC vs 04 OCT 02LEVEL(dBr) FREQ(Hz)

0

15

30
45

65

70

75

80

85

90

95

20

20k

50

100

200 500

1k 2k

5k

10k

dBr

Hz

85

90

95

100

AUDIO PRECISION 1037CANEC vs 04 0CT 02LEVEL(dBr) FREQ(Hz)

65

70

75

80

85

90

95

20

20k

50

100

200 500

1k 2k

5k

10k

0°

30°

15°

45°

dBr

Hz

85

90

95

100

AUDIO PRECISION 1038BANEC vs 16 APR 02LEVEL(dBr) FREQ(Hz)

‘treble’ level controls, and the ‘bass tilt’ an d ‘bass roll-off ’ controls
on the free field response of the 1037C, measur ed at 2 m.

Figure 8: The curves above show the effect of t he ‘bass’, ‘mid’ and
‘treble’ level controls, and the ‘bass tilt’ an d ‘bass roll-off ’ controls
on the free field response of the 1038B, measur ed at 2 m.

Figure 9: The upper curve group shows the horiz ontal directivity
characteristics of the 1037C in its vertical co nfiguration
measured at 2 m. The lower curve is a 1/6 octav e power
response measurement, derived from 144 individu al directivity
measurements.

Safety considerations

Although the 1037C and 1038B monitors

have been designed in accordance with

international safety standards, to ensure

safe operation and to maintain the instrument

under safe operating conditions, the following

warnings and cautions must be observed:

1. Servicing and adjustment must only

be performed by qualified service

personnel. The amplifier’s rear panel

must not be opened.

2. Do not use this product with an

unearthed mains cable as this may lead

to personal injury.

3. To prevent fire or electric shock, do not

expose the unit to water or moisture. Do

not place any objects filled with liquid,

Figure 10: The upper curve group shows the hori zontal
directivity characteristics of the 1038B in its vertical configu ration
measured at 2 m. The lower curve is a 1/6 octav e power
response measurement, derived from 144 individu al directivity
measurements.

such as vases on the speaker or near it.

4. Note that the amplifier is not completely

disconnected from the AC mains

service unless the mains cable

is removed from the amplifier or the

mains outlet.

WARNING!

These speakers are capable of producing

sound pressure levels in excess of 85 dB,

which may cause permanent hearing

damage.

Guarantee

This product is supplied with one year guar-

antee against manufacturing faults or defects

that might alter its performance. Refer to sup-

plier for full sales and guarantee terms.

1037C Accessories

Order code

Wall mount 1037-404

Floor stand 1037-405

Handles 1001-406*

Protective grille 1037-409

Rack adapter 1037-412

* Factory installed option only

1038B Accessories

Order code

Floor stand 1038-405

Handles 1001-406*

Protective grille 1038-409

Rack adapter 1038-421

* Factory installed option only

1037C and 1038B Operating Manual

SYSTEM SPECIFICATIONS

1037C 1038B

Lower cut-off fr equency, -3 dB
Upper cut-off fr equency, -3 dB
Free field frequency response
of system

Maximum short te rm sine wave
acoustic output on axis in half spa ce,
averaged from 10 0 Hz to 3 kHz

Maximum long ter m RMS acoustic
output in same c onditions with IEC ­weighted noise ( limited by driver u nit
protection circu it)

Maximum peak aco ustic output
per pair above c onsole with music
materia

Self generated n oise level in free field
@1m on axis

Harmonic distort ion at 95 dB SPL at
1m on axis:

Drivers
Bass
Midrange
Treble
All drivers are magnetically shield ed

Weight 37 kg (82 lb) 60 kg (130 lb)

Dimensions
Height
Width
Depth

<35 Hz
>22 kHz
37 Hz - 21 kHz ( ±2.5 dB)

@1m >116 dB SPL @1m >120 dB SPL

@1m >107 dB SPL @1m >116 dB SPL

@ 1.7m >126 dB @ 2m >124 dB

<15 dB (A weight ed)

freq. <100 Hz <3 %
freq. >100 Hz <0 .5%

305 mm (12") con e
130 mm (5") cone
25 mm (1") metal dome

680 mm (26 3/4")
400 mm (15 3/4")
380 mm (15")

<33 Hz
>20 kHz
35 Hz - 20 kHz ( ±2.5 dB)

freq. 50...100 H z <1%
freq. >100 Hz <0 .5%

385 mm (15") con e
130 mm (5") cone
25 mm (1") metal dome

810 mm (32")
480 mm (18 9/10" )
420 mm (16 1/2")

CROSSOVER SECTION

1037C 1038B

Input connector XLR female pin 1 gnd

Input impedance 10 kOhm

Input level for 100 dB SPL
output @1m

Input level for maximum short term
output

Subsonic filter 18 dB/octave

Ultrasonic filte r 12 dB/octave abo ve 25 kHz

Crossover freque ncy
Bass/Mid
Mid/Treble

Crossover acoust ical slopes 18 - 24 dB/octav e 24 - 32 dB/octav e

Crossover level control operating
range in 1 dB st eps
Bass
Mid
Treble

Bass roll-off co ntrol in 2 dB steps from 0 to -8 dB @35 Hz from 0 to -8 dB @33 Hz

Bass tilt contro l in 2 dB steps from 0 to -8 dB @8 0 Hz

pin 2 +
pin 3 -

variable from +6 to -6 dBu

variable from +2 2 to +10
dBu for 116 dB S PL @1m

below 35 Hz

420 Hz

3.2 kHz

from 0 to -6 dB
from 0 to -6 dB
from 0 to -6 dB

The 'CAL' positi on is with all tone controls set to 'o ff'
and input sensit ivity control to ma ximum.

variable from +2 6 to +14
dBu for 120 dB S PL @1m

18 dB/octave
below 33 Hz

410 Hz
3 kHz

AMPLIFIER SECTION

1037C 1038B

Bass amplifier s hort term output
power

Midrange amplifi er short term outpu t
power with an 8 Ohm load

Treble amplifier short term o utput
power with an 8 Ohm load

Slew rate 80V/µs

Amplifier system distortion at nomi nal
output
THD
SMPTE-IM
CCIF-IM
DIM 100

Signal to Noise ratio, referred to full
output
Bass
Midrange
Treble

Mains voltage 10 0/200V or 115/230V

Voltage operating range nominal ±10%

Power consumption
Idle
Full output

180 W (4 Ohm loa d) 400 W (8 Ohm loa d)

120 W

120 W

Long term output power is limited b y driver unit prote c­tion circuitry.

<0.05%
<0.05%
<0.05%
<0.05%

>100 dB
>100 dB
>100 dB

50 W
300 W

60 W
500 W

Genelec Docu ment D1037CR001a Copy right Genelec Oy 2.200 5. All data subject t o change without prio r notice

Intern ational en quiries:

Genele c, Olvitie 5

FIN-74 100, Iisal mi, Finlan d

Phone [phone]

Fax [phone]

Email genele [e-mail]

In the U.S. plea se contact :

Genele c, Inc., 7 Tech C ircle

Natick , MA 01760 , USA

Phone [phone]

Fax [phone]

Email genele [e-mail]

In Chi na please contact:

Genele c China Re presentati ve Office

Soho N ew Town, 88 Jia nguo Road

D-150 4, Chaoyan g District

Beijin g 100022, China

Phone [phone]

Fax [phone]

www.genelec.com