Q4 audio GE134 User manual

GE134 SINGLE 1/3 OCTAVE GRAPHIC EQUALISER
GE234 DUAL 1/3 OCTAVE GRAPHIC EQUALISER
USER MANUAL
B
A
LE
CUT FILTERS
12dB/OCT
.
ON BYPASS
ALL
POWER
SHELVING FILTERS
6dB/OCT.
CLIP
3
6
9
12
1
18
21
dB
SIG.
MAX
OUT
IN
MEASURING
POINT
H
E
A
D
R
O
O
M
GAIN
0+1
3
8
+12
dB
-1
3
8
-12
DYN
01
3
8
12
dB
1
3
8
12
LOW
NOISE
HP
90
180
300
Hz
1
230
20
40
LF
0
+3
+6
dB
-3
-6
LP
10K
22K
40K
Hz
2K
30K
K
HF
0
+3
+6
dB
-3
-6
CH1
0
+6
dB
+3
CLIP
3
6
9
12
1
18
21
dB
SIG.
MAX
OUT
IN
MEASURING
POINT
H
E
A
D
R
O
O
M
CLIP
3
6
9
12
1
18
21
dB
SIG
.
H
E
A
D
R
GAIN
0+1
3
8
+12
dB
-1
3
8
-12
GAIN
0+1
3
8
+12
dB
-1
3
8
-12
DYN
01
3
8
12
dB
1
3
8
12
LOW
NOISE
01
3
8
12
dB
1
3
PHIC
6 dB
SCALE
CUT FILTERS
12dB/OCT
.
ON
ONPOWER
SHELVING FILTERS
6dB/OCT
.
HP
90
180
300
Hz
1
230
20
40
LF
0
+3
+6
dB
-3
-6
LP
10K
22K
40K
Hz
2K
30K
K
HF
0
+3
+6
dB
-3
-6
0
+3

2

3
Thank you for choosing this GE series graphic equaliser for your
application. You have made an excellent choice.
The GE series are designed and built to be the most versatile
analog graphic processors available.
The combination of a full featured graphic equaliser with high
and low pass and shelving filters provides full control to even the
most exacting user.
The dynamics trim control and the 8 segment level peak meter
provide headroom optimisation of the signal path. This unique
feature makes it possible to reduce the noise floor of the unit by
as much as 12dB, making the equaliser virtually dissapear in
critical applications.
If a higher noise floor is acceptable, this control can create an
extra 12dB of headroom for the filter circuits, thereby minimising
distortion and clipping.
The autoranging power supply of the GE series guarantees trou-
ble free operation of these units all over the world, independent
on local mains conditions.
You probably want to start working with this new equipment right
away and not read all of the information inside this manual.
For those of you who are in a hurry, please read the safety in-
structions carefully. Also the information about the DYN control,
a unique feature of these units, will be very enlighting.
Because of the apparent similarities between the GE134 and
the GE234, both are covered together in this manual.
Summit Engineering nv
Q4audio division
Tongersesteenweg 190
3800 Sint Truiden
Belgium
tel: [phone]
fax: [phone]
www.Q4audio.com
email: [email protected]
Q4audio is a registered trademark of Summit Engineering nv
All other trademarks are property of their respective owners
SE Part Number: 7000-0004
Rev. B

4
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN !
!
ATTENTION
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR !
ACHTUNG
GEFAR FUR ELEKTRISCHEN
SCHLAG
GERÄT NICHT ÖFFNEN
!
This symbol is intended to alert the user of presence
of uninsulated dangerous voltage within the products
enclosure that may be of sufficient magnitude to con-
stitute risk of electric shock to persons.
This symbol is intended to alert the user of presence
of important operating and maintenance (servicing)
instructions in the literature accompanying the appli-
ance.
Explanation of grahical symbols:
Explication des symboles graphiques:
Ce symbole doit alerter lutilisateur du danger
provenant dun voltage dangereux et non prot g à
lint rieur de lappareil, voltage suffisamment fort pour
repr senter un danger r el d lectrocution.
!
Ce symbole doit attirer lattention de lutilisateur sur
les instructions importantes qui concernent le service
et la maintenance et qui accompagnent tout appareil.
Erklärung der Bildsymbole:
Dieses Symbol warnt den Benutzer vor nicht isolierter
gefährlicher Spannung im Inneren des Gerätes. Diese
Spannung ist hoch genug um Personen durch
elektrischen Schlag zu gefährden.
Dieses Symbol weist den Benutzer auf wichtige
Bedienungs- und Wartungsanweisungen hin die in den
gerätebegleitenden Unterlagen aufgeführt werden.
Note:
This equipment has been tested and found to comply with EN55103-
1 and EN55103-2 product specifications. These product specifica-
tions are designed to provide a reasonable protection against harm-
ful interference. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance
with instructions, can cause harmful interference. There is no guar-
antee that interference will not occur in a specific installation. If
harmful interference is detected try and correct it by one of the fol-
lowing measures:
Increase the separation between the equipment.
Connect the equipment to different mains outlets.
Reroute cables.
!
CAUTION: To reduce the risk of electric shoc, do not open.
No user-serviceable parts inside. Refer servicing to quali-
fied personnel.
WARNING: To prevent fire or electric shoc, do not ex-
pose this equipment to rain or moisture.
ATTENTION: Pour viter les risques de choc lectrique,
ne pas ouvrir. Cet appareil ne comporte aucune pièce
pouvant être r par e par lutilisateur. Confier lentretien à
un technicien qualifi .
AVERTISSEMENT: Pour viter les risques de choc
lectrique ou dincendie, nexposez cet appareil ni à
lhumidit ni à leau (pluie...).
ACHTUNG: Um Gefährdung durch elektrischen Schlag
zu vermeiden darf das Gerät nicht geöffnet werden. Es
befinden sich keine vom Benutzer reparierbaren Teile im
inneren des Gerätes.Jegliche Reparatur soll einem
qualifizierten Fachmann uberlassen werden.
WARNUNG: Um die Gefahr eines Feuers bzw. eine
Verletzung durch elektrischen Schlag zu vermeiden sollte
das Gerät niemals Regen oder Feuchtigkeit ausgesetzt
werden.

5
Safety Instructions
1. Read nstructions - All safety and operating instructions should
be read before this unit is put into service.
2. Keep instructions - The safety and operating instructions
should be retained for future reference.
3. Observe Warnings - All warnings on the unit and in this oper-
ating manual should be strictly followed.
4. Water and Moisture - This unit should not be used near water
- for example, near bathtub, washbowl, kitchen-sink, laundry
tub, in a wet basement, near a swimming pool or the like.
5. Heat - This unit should be placed away from heat sources,
such as radiators or other devices which produce heat.
6. Power cord protection - The power supply cord should be
routed so that it is not likely to be stepped on or pinched by
objects placed on or against them.
7. Non-use periods - The power cord of the unit should be un-
plugged from the outlet when the unit is not used for a longer
period.
8. Object and liquid entry - Care should be taken so that objects
do not fall and liquids are not spilled into the inside of the unit.
9. Damage requiring service - Unplug the unit and refer servic-
ing to qualified service personnel under any of the following
conditions:
Objects have fallen, or liquid has been spilled into the unit.
The unit has been exposed to rain.
The unit does not appear to operate normally or exhibits a
marked change in performance.
The unit has been dropped, or its chassis damaged.
The power cord or plug is damaged.
10. Servicing - The user should not attempt to service the unit
beyond those means described in this operating manual. All
other servicing should be referred to qualified personnel.
11. To prevent fire or electric shock - Only use the polarised
mains plug option together with a polarised receptacle. This
unit is equipped with a single pole disconnect device (fuse) in
the phase (live) wire. If an unpolarised mains connection is
used the receptacle the unit is connected to must be equipped
with a two pole disconnect device (fuse) of appropriate rating.
12. Grounding and mains polarisation - Precautions should be
taken so that the grounding and mains polarisation means of
the unit are not defeated.
13. Ventilation - Slots and openings in the unit are provided for
ventilation, to ensure reliable operation and to prevent over-
heating of the unit. These openings should not be blocked or
covered!

6
GRAPHIC
SECTION
GRAPHIC
SECTION
ONON
6 dB
SCALE
6 dB
SCALE
00
+6 dB+6 dB
-6 dB-6 dB
-3-3
+3+3
12K512K5 16K16K 20K Hz20K Hz
CUT FILTERS
12dB/OCT.
CUT FILTERS
12dB/OCT.
ONON ONON BYPASS
ALL
BYPASS
ALL
PO ERPO ER
SHELVING FILTERS
6dB/OCT.
SHELVING FILTERS
6dB/OCT.
CLIPCLIP
33
66
99
1212
1515
1818
21 dB21 dB
SIG.SIG.
MAXMAX
OUTOUT
ININ
MEASURING
POINT
MEASURING
POINT
H
E
A
D
R
O
O
M
H
E
A
D
R
O
O
M
GAINGAIN
00+1+1
33
55
88
+12
dB +12 dB
-1-1
33
55
88
-12-12
DYNDYN
0011
33
55
55
88
12
dB 12 dB
11
33
88
1212
LO
NOISE
LO
NOISE
HPHP
9090
180180
300
Hz 300 Hz
1515
230230
2020
4040
LFLF
00
+3+3
+6
dB +6 dB
-3-3
-6-6
LPLP
10K10K
22K22K
40K
Hz 40K Hz
2K2K
30K30K
5K5K
HFHF
00
+3+3
+6
dB +6 dB
-3-3
-6-6
1 2 4 56 7 10 11 13
12
14
1598
3
16
The Front Panel
1. Sliders to cut or boost the individual 1 3 octave frequencies
of the graphic equaliser.
2. Graphic section switch with control led enables or disa-
bles the graphic equaliser. Even in bypass mode, the level
and clip detection keeps monitoring the graphic equalisers
circuitry for overload conditions.
3. 6 dB scale switch with control led to alter the cut and
boost range of the graphic equaliser from 12dB to 6 dB.
4. High Pass frequency adjustment. Adjustment range is 15Hz*
to 300Hz*.
5. HP switch with control led to turn HP filter on or off.
6. LP switch with control led to turn LP filter on or off.
7. Low Pass frequency adjustment. Range is 2KHz* to 40KHz*.
8. Low Frequency Shelving filter control. Enables tilting the
low frequency range by ±6db.
9. High Frequency Shelving filter control. Enables tilting the
high frequency range by ±6dB.
10. Power led indicates when mains power is connected to
the unit.
11.Measuring point switch selects monitoring of input, output

7
or maximum signal level. During operation the switch should
be in the MAX position, indicating the maximum signal level
of all possible overload points inside the unit. Time con-
stants are chosen for easy read-out and comfortable ad-
justment of the DYN control.
The INPUT and OUT positions enable overall gain adjust-
ment of the unit and should only be used temporarily while
adjusting the equaliser. Response time of the display is
very fast in this mode to avoid delay.
12. Headroom meter and a clip indicator. The headroom indi-
cator is an average calibrated peak meter that indicates
headroom in dB from clipping level. The clip led lights at
+20dBu (0 dBu is 0.7746V). The absolute overload point of
the unit is at +21dBu. The clip led gives accurate indication
of overload conditions inside the unit, independent of the
measuring point switch position.
13. Bypass All switch with control led to bypass the complete
equaliser. By pressing this knob, the input is directly linked
to the output by means of a the fail-safe relay. When the
power to the unit is removed, the unit automatically switches
to this bypass mode.
14. Dynamics control knob. This control enables levelling of
the signal inside the equaliser. By turning the control anti-
clockwise (low noise position) the signal is amplified at the
input and attenuated at the output. This increases the sig-
nal level in the equaliser electronic circuits and improves
the signal to noise ratio by as much as 12dB. Use the head-
room indicator as a read-out of the maximum signal level in
the units circuits to adjust this control.
Turning the DYN control clockwise will reduce the input gain
and at the same time increase output gain, to keep overall
gain constant. As a consequence, the input signal level to
the filters is lowered, giving more headroom at the expense
of an increased noise floor. Because the headroom indica-
tor measures signal level at every critical point in the equal-
iser, therefore also at the output, turning the DYN control
clockwise will not always show up on the headroom indica-
tor. Reason is that the output level remains the same and
decreasing the signal level in circuits that precede the out-
put is not sensed by the headroom indicator.
The true virtue of the clockwise DYN range becomes ap-
parent when some filters in the unit are masked by others.
For instance, when the shelving controls are used to boost
a range of frequencies while the graphic equaliser is used
to cut a specific range of these frequencies. In such case it
can be important to reduce the signal level in the shelving
filters to accommodate the boost and avoid clipping of the
these filters. In this case the gain in headroom is clearly
indicated by the level meter because the measuring point at
the shelving filters in not masked by the output measuring
point because the graphic equaliser that follows the shelv-
ing filters in the signal path, attenuates the output level.
Changing the DYN control position does not change overall
gain of the unit (smaller than ±0.5dB of overall gain change
over the entire control range).
15. Gain control knob to adjust overall gain between -12dB
and +12dB. 16. Four M4 screws fix the 19" bracket orna-
mental parts. In case a security cover is mounted, these
mounting positions are used to fix the security cover.
* Note: Although high quality carbon polymer potentiometers
are used in this unit, absolute calibration accuracy of these
controls is only modest. Indicated values on the front panel
represent average numbers collected from several produc-
tion lots. Actual values can differ by as much as 20% from
the indicated values.

8
The Rear Panel
1 2 5 3 4
AVIS
RISQUE DE CHOC
ELECTRIQUE
NE PAS OUVRIR
CAUTION
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
ATTENTION: AFIN DE REDUIRE LE
RISQUE DE CHOC ELECTRIQUE, NE
PAS EXPOSER A LA PLUIE NI A
L'HUMIDITE.
INPUT
!
1
2
3
GND
+
-
ARNING: TO REDUCE THE RISK
OF FIRE OR ELECTRIC SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE. NO USER
SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED
PERSONNEL.
READ INSTRUCTION MANUAL
CAREFULLY BEFORE USE.
CAUTION: FOR CONTINUED
PROTECTION AGAINST FIRE HAZARD
REPLACE ONLY ITH SAME FUSE
TYPE AND RATING. REFER TO TYPE
LABEL FOR FUSE RATING.
ATTENTION: AFIN D'ASSURER UNE
PROTECTION PERMANENTE CONTRE
LES RISQUES D'INCENDIE REMPLECEZ
UNIQUEMENT PAR UN FUSIBLE DE
MEME TYPE ET VALEUR. CONSULTEZ
LA PLAQUE DE MARQUAGE.
INPUT IMPEDANCE:
20K BALANCED
10K UNBALANCED
OUTPUT IMPEDANCE:
100 OHM BALANCED
50 OHM UNBALANCED
OUTPUT SYSTEM CONNECTOR
MAINS INPUT
CLASS 1 EQUIPMENT.
MUST BE EARTHED!
LINE: 85-264V / 50-60Hz
www.Q4audio.com
Q4audio IS A PRODUCT OF SUMMIT ENGINEERING NV
MADE IN BELGIUM, EU
ATTACH TYPE LABEL TO THIS LOCATION. THIS
LABEL CONTAINS IMPORTANT SAFETY
INFORMATION AND MUST NOT BE REMOVED.
REPLACE LABEL IN CASE IT GOT DAMAGED
OR LOST.
NOTICE: SYSTEM CONNECTOR USES
PROPRIETARY FORMAT. REFER TO USER
MANUAL BEFORE MAKING CONNECTIONS.
Model: GE 134
Serialnr.: GE134-02AA-0001
Date of manufacture: 28.08.02
Made in Belgium, EU
FUSE: T 315 mA / 250 V
Power requirements: 85-264V AC 50/60Hz 12
AVIS
RISQUE DE CHOC
ELECTRIQUE
NE PAS OUVRIR
CAUTION
RISK OF ELECTRIC
SHOCK
DO NOT OPEN
!
1
2
3
GND
+
-
ATTENTION: AFIN DE REDUIRE LE RISQUE DE CHOC
ELECTRIQUE, NE PAS EXPOSER A LA PLUIE NI A L'HUMIDITE.
ARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
READ INSTRUCTION MANUAL CAREFULLY BEFORE USE.
CAUTION: FOR CONTINUED
PROTECTION AGAINST FIRE HAZARD
REPLACE ONLY ITH SAME FUSE
TYPE AND RATING. REFER TO TYPE
LABEL FOR FUSE RATING.
ATTENTION: AFIN D'ASSURER UNE
PROTECTION PERMANENTE CONTRE
LES RISQUES D'INCENDIE REMPLECEZ
UNIQUEMENT PAR UN FUSIBLE DE
MEME TYPE ET VALEUR. CONSULTEZ
LA PLAQUE DE MARQUAGE.
INPUT IMPEDANCE:
20K BALANCED
10K UNBALANCED
OUTPUT IMPEDANCE:
100 OHM BALANCED
50 OHM UNBALANCED
CH1
CH2
INPUT
OUTPUT
MAINS INPUT
CLASS 1 EQUIPMENT.
MUST BE EARTHED!
LINE: 85-264V / 50-60Hz
www.Q4audio.com
Q4audio IS A PRODUCT OF SUMMIT ENGINEERING NV
MADE IN BELGIUM, EU
ATTACH TYPE LABEL TO THIS LOCATION. THIS
LABEL CONTAINS IMPORTANT SAFETY
INFORMATION AND MUST NOT BE REMOVED.
REPLACE LABEL IN CASE IT GOT DAMAGED
OR LOST.
Model: GE 234
Serialnr.: GE234-02AA-0001
Date of manufacture: 28.08.02
Made in Belgium, EU
FUSE: T 315 mA / 250 V
Power requirements: 85-264V AC 50/60Hz 20

9
1. Balanced input XLR-3. The input impedance is 20K Ohm bal-
anced or 10K unbalanced. Each input leg has the same im-
pedance to ground to maximise input common mode rejection
ratio, independent of source impedance. The maximum over-
load level of the input circuitry is +21dBu. Pin 1 of the input
connector is connected to chassis ground. Pin 2 is the non-
inverting (positive,) pin 3 the inverting (negative) input, con-
form international standards.
2. Balanced output XLR -3. The output impedance is 100 Ohm
balanced or 50 Ohm unbalanced. The output can drive +21dBu
into 600 Ohm with low distortion. Pin 1 is connected to chassis
ground. Pin 2 is the non-inverting (positive,) pin 3 the inverting
(negative) input, conform international standards.
3. Mains inlet and fuseholder. The mains connector is a stand-
ard 3 pin IEC connector. The centre terminal is directly con-
nected to the chassis of the unit and must be connected to the
earth terminal of the mains outlet. This is important for your
safety. The mains cable supplied with this unit is a universal
European model. Use only the polarised mains plug option
together with a polarised receptacle. This unit is equipped
with a single pole disconnect device (fuse) in the phase wire. If
an unpolarised mains connection is used the receptacle the
unit is connected to must be equipped with a two pole discon-
nect device (fuse) of appropriate rating. In case the mains
plug on the mains cable is not conform to your local standard,
you will need to replace it with a suitable one. In this case it is
very important to respect the colour coding of the wires:
yellow green : earth ground
brown or black : phase (live)
blue : neutral
The mains fuse is a standard 5x20mm fuse. Rating is indi-
cated on the type label on the back of the unit. The fuse drawer
can easily be opened with a flat tip screwdriver. For safety
reasons, the mains cable must be removed before the drawer
can be opened. Replace only with the same fuse type and
rating. The auto-ranging power supply of the GE series guar-
antees trouble free operation all over the world, independent
of local mains conditions. Acceptable mains voltages are in
the range from 85 to 264 Vrms 50 60Hz. When mains power is
removed, the unit automatically switches to the bypass mode,
hardware linking the input to the output by means of the fail-
safe relay.
4. The screws on both sides of the mains inlet are essential for
the safety of the unit. These screws connect the earth pin of
the mains connector to the chassis. These screws must be
well tightened at all times.
5. (GE134 only) 15pin SubD system connector. This connector
integrates the equaliser in the optional Q4audio equaliser
drawer.

10
S eci fications
nputs:
Type: Electronically balanced. Transformer balancing op-
tional.
Input impedance:10KOhm. Equal impedance for + and - legs.
Maximum input level: +21dBu.
Input connector: XLR-3F
Pin 1 Floating
Pin 2 Signal + (hot)
Pin 3 Signal - (cold)
Outputs:
Type: Electronically balanced and floating, simulating trans-
former output. Active transformer balancing optional.
Output impedance: 100 Ohms 50 Ohms each leg.
Maximum output level: +21dBu into 600 Ohms or greater.
Output connector: XLR-3M
Pin 1 Ground
Pin 2 Signal + (hot)
Pin 3 Signal - (cold)
General performance:
Frequency response: ±0.5dB, 20Hz-20KHz (all controls flat).
THD: <0.005%, 20Hz-20KHz.
Noise: <-93dBu, 22Hz-22KHz unweighted, graphic equaliser
in circuit 0dB settings.
Channel separation: > 80dB 20Hz-20KHz (GE234).
Level meter display: 8 led average calibrated peak respond-
ing headroom indication in 3dB steps. Clip led lights for ap-
proximately 200ms if the instantaneous peak voltage at any
potential overload point in the unit comes within 1 dB of clip-
ping, independent on level display routing switch position.
Dynamics control: Continuously variable ±12dB of gain shift
lowers noise floor by 12dB or increases headroom by 12dB.
Changing the DYN control settings will change overall gain of
the unit by no more than ±0.5dB (±0.3dB typical).
Filters:
Graphic equaliser: 30 near ISO centre frequencies 25Hz-
20KHz 1 3 octave.
Graphic filters centre frequency tolerance < 5%.
Max boost cut: switcheable 6 or 12dB ±0.5dB reciprocal.
Graphic equaliser switcheable in out of signal path.
High pass filter: 15Hz-300Hz frequency range.
Butterwort maximally flat 12dB octave response.
Switcheable in out of signal path.
Low pass filter: 2KHz-40KHz frequency range.
Butterwort maximally flat 12dB octave response.
Switcheable in out of signal path.
Shelving filters: 6dB of boost and cut at 100Hz and 14KHz.
6dB octave slope.
Power requirements
Voltage: 85V-264V 50 60Hz.
Consumption: 12VA (GE134), 20VA (GE234).
Connector: IEC 3 pin.
Dimensions:
GE134: 420mm (482.6mm with 19" mounting brackets) wide
x 88.9mm high x 55mm deep.
GE234: 420mm (482.6mm with 19 mounting brackets) wide
x 133.3mm high x 55mm deep.
Weight:
GE134: Shipping: 3.1kg; Net: 2.4 kg.
GE234: Shipping:4.0 kg; Net: 3.3 kg.
Standards:
Safety: EN60065
EMC: EN55103-1 EN55103-2 E2 E3

11
Warranty
SUMMARY
The Q4audio division of Summit Engineering nv Tongersesteenweg 190 3800 Sint-Truiden Belgium, the creators and manufacturers of
the Q4audio product line warrants to you, the original purchaser and any subsequent owner of this Q4audio product, for a period of 2
(two) years (warranty period) from the date of purchase by the original purchaser that the product is free of defects in components and
factory workmanship. The date of purchase is the date appearing on the first end-users sales receipt or other proof of original purchase
from an authorised Q4audio dealer.
TEMS EXCLUDED FROM WARRANTY
This Q4audio warranty does not cover product failure caused by misuse, accident or neglect. Nor shall it be applicable to any product
on which the serial number has been defaced, altered or removed. This warranty shall be considered void if this product is subjected to
repair work or alteration by persons other than authorised by Q4audio in such a manner as to injure, in the sole judgment of Q4audio, the
performance, stability, reliability or safety of this product. This warranty does not apply to finish or appearance items. This warranty is
in effect only during the warranty period.
OUR COMM TMENT
During the warranty period, Q4audio will remedy any defect (except as excluded) by repair or at its option replacement or refund. In case
of refund the defective or malfunctioning product shall be made available to us free and clear of all lies or other encumbrances. The
refund will be equal to the original purchase price less a reasonable depreciation of 10% per year from the date of purchase. The refund
will not include interests, insurance, closing costs, loss of profit or other financial costs that may be the result of the products defect.
OBTA N NG WARRANTY SERV CE
You must notify us of your need for warranty service, preferably by filling out the service request form in this manual and returning it to
us. We will give you notice of the authorised service center to whom you may deliver the product or we will give you an authorisation to
return it to the factory. All components must be shipped in a factory pack, shipping prepaid. Repairs and replacement parts provided
under the terms of this warranty shall carry only the unexpired portion of this warranty.
D SCLA MER
Q4audio is not liable for any damage to other products such as speakers, amplifiers or any other equipment that is caused by using this
Q4audio product.
PRODUCT CHANGES
We reserve the right to change the design on any product without prior notice and with no obligation to make corresponding changes in
products previously manufactured.

12
420,00
482,60
55,00 88,90
-12 dB -12 dB
GRAPHIC
SECTION
GRAPHIC
SECTION
ONON
6 dB
SCALE
6 dB
SCALE
00
+1+1
+3+3
+6+6
+9+9
+12
dB +12 dB
-1-1
-3-3
-6-6
-9-9
00
+6
dB +6 dB
-6 dB -6 dB
-3-3
+3+3
2525 3131 4040 5050 6363 8080 100100 125125 160160 200200 250250 315315 400400 500500 630630 800800 1K1K 1K251K25 1K61K6 2K2K 2K52K5 3K153K15 4K4K 5K5K 6K36K3 8K8K 10K10K 12K512K5 16K16K 20K Hz 20K Hz
CUT FILTERS
12dB OCT.
CUT FILTERS
12dB OCT.
ONON ONON BYPASS
ALL
BYPASS
ALL
POWERPOWER
SHELVING FILTERS
6dB OCT.
SHELVING FILTERS
6dB OCT.
CLIPCLIP
33
66
99
1212
1515
1818
21
dB 21 dB
SIG.SIG.
MAXMAX
OUTOUT
ININ
MEASURING
POINT
MEASURING
POINT
H
E
A
D
R
O
O
M
H
E
A
D
R
O
O
M
GAINGAIN
00+1+1
33
55
88
+12
dB +12 dB
-1-1
33
55
88
-12-12
DYNDYN
0011
33
55
55
88
12
dB 12 dB
11
33
88
1212
LOW
NOISE
LOW
NOISE
HPHP
9090
180180
300
Hz 300 Hz
1515
230230
2020
4040
LFLF
00
+3+3
+6
dB +6 dB
-3-3
-6-6
LPLP
10K10K
22K22K
40K
Hz 40K Hz
2K2K
30K30K
5K5K
HFHF
00
+3+3
+6
dB +6 dB
-3-3
-6-6
GE134 GE134
GRAPHIC EQUALISER
GE134 Dimensions

13
420,00
55,00
482,60
133,30
BYPASS
ALL
CH1
CH2
0
+1
+3
+6
+9
+12
dB
-1
-3
-6
-9
-12
dB
0
+6
dB
-6 dB
-3
+3
0
+1
+3
+6
+9
+12
dB
-1
-3
-6
-9
-12
dB
0
+6
dB
-6 dB
-3
+3
25 31 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1K25 1K6 2K 2K5 3K15 4K 5K 6K3 8K 10K 12K5 16K 20K Hz
CLIP
3
6
9
12
15
18
21
dB
SIG.
MAX
OUT
I
MEASURI G
POI T
H
E
A
D
R
O
O
M
CLIP
3
6
9
12
15
18
21
dB
SIG.
MAX
OUT
I
MEASURI G
POI T
H
E
A
D
R
O
O
M
GAI
0+1
3
5
8
+12
dB
-1
3
5
8
-12
GAI
0+1
3
5
8
+12
dB
-1
3
5
8
-12
DY
01
3
5
5
8
12
dB
1
3
8
12
LOW
OISE
DY
01
3
5
5
8
12
dB
1
3
8
12
LOW
OISE
GRAPHIC
SECTIO
O
6 dB
SCALE
CUT FILTERS
12dB/OCT.
O O POWER
SHELVI G FILTERS
6dB/OCT.
HP
90
180
300
Hz
15
230
20
40
LF
0
+3
+6
dB
-3
-6
LP
10K
22K
40K
Hz
2K
30K
5K
HF
0
+3
+6
dB
-3
-6
GRAPHIC
SECTIO
O
6 dB
SCALE
CUT FILTERS
12dB/OCT.
O O
SHELVI G FILTERS
6dB/OCT.
HP
90
180
300
Hz
15
230
20
40
LF
0
+3
+6
dB
-3
-6
LP
10K
22K
40K
Hz
2K
30K
5K
HF
0
+3
+6
dB
-3
-6
GE234 GRAPHIC EQUALISER
GE234 Dimensions