SPL Gemini Series User manual

Gemini
Mastering M/S Processor
Manual

Content
Gemini
Version 1.1 – 03/2019 2
Package Contents 2
Product Registration 2
Introduction 3
The rst M/S processor in 120V technology 3
Technical Aspects 4
120 Volt Technology 4
120 Volt Technology – Diagram 5
Installation 6
Voltage Selection 6
First Steps 6
Cabling: Rear Side 7
XLR inputs and output 7
Ground Lift switch to avoid ground loop 7
1 Inputs 8
2 Sends 8
3 Returns 9
4 Outputs 9
Pairing Gemini and DMC 10
Insering a processor 10
Pairing Gemini and Hermes 11

Content
Control Elements 12
1 Active 12
2 Insert (MID) 12
3 Solo (MID) 13
4 Balance & Trim 13
5 Balance 14
6 Trim 14
7 Insert (SIDE) 14
8 Solo (SIDE) 14
9 Filter & Width 14
10 Stereo Width 15
11 Elliptical Filter 15
Specications 16
Measurements 16
Security Advices 17
Notes on Environmental Protection 18
Contact 19
Copy template settings 20

2
Version 1.1 – 03/2019
Developer: Bastian Neu
This manual includes a description of the product but no guarantee as for specific charac-
teristics or successful results.
Unless stated otherwise, everything herein corresponds to the technical status at the
time of delivery of the product and user manual by SPL electronics GmbH.
The design and circuitry are under continuous development and improvement.
Technical specifications are subject to change.
Package Contents
Gemini Mastering M/S Processor
Power cord
Manual
The Gemini Mastering M/S Processor is available in different colors.
Black: Model 1720
Red: Model 1724
All Black: Model 1723
Do consider keeping the original packaging. It can come in very useful whenever you need
to transport your gear. If there is ever the need to send it in for repair, the original packag-
ing guarantees a safe shipment.
Product Registration
Register your device to get useful information concerning the product. On the front page
of this manual you will find a QR code, which includes the link to the registration form and
automatically fills in the serial number and product name into the form. Alternatively you
can also call up the online form with your internet browser via the following link:
https://spl.audio/register

3
Introduction
The rst M/S processor in 120V technology
With Gemini M/S Mastering Processor M/S processing enters the SPL Mastering series.
Gemini is an M/S Encoder and Decoder.
Mid signals (voice, snare, bass …) can clearly be seperated from side signals (guitar, spa-
tial sounds, cymbals …) and can individually be processed. When working on the sum
signal, M/S coding often is the best way to specically get access to individual elements
within a mix.
Gemini also provides the possibility to work on the stereo panorama.
With the Balance control you can position the mid signal within the stereo panorama.
With the Trim control, you can adjust the level of the mid signal in relation to the side sig-
nal. In connection with the Stereo Width control, the mixing ratio of both channels can be
adjusted.
An Elliptical Filter, which can cut low frequency ratios of the side band is also provided.
The SPL Gemini Mastering M/S Processor was developed and manufactured in Germany.

4
Technical Aspects
120 Volt Technology
SPL‘s goal was to push analog signal processing to the limits. That‘s why we combined
the best possible components with a high-grade optimized circuit design.
We have been using the in-house developed 120 Volt technology - the highest-ever oper-
ating voltage used for audio applications - in all our products from the Mastering series
for years. Some of the most highly respected Mastering studios today revolve around
SPL consoles and signal processors from our Mastering series (Bob Ludwigs Gateway
Mastering & DVD in the USA, Simon Heyworth‘s Super Audio Mastering in the UK, Galaxy
Studios in Belgium, and the legendary Wisseloord in the Netherlands, for instance).
The 120 Volt technology is based on op-amps developed internally by SPL‘s co-founder
and Chief Developer Wolfgang Neumann. The Hermes Mastering Router features the
most advanced generation of these op-amps. They boast with even better tech specs
thanks to the thermal behavior optimization they underwent under the hands of Bastian
Neu.
Ultimately, the supply voltage is key for the overall dynamic response of a processor.
Voltage is to an electrical circuit what cylinder capacity is to an internal combustion
engine:
You can‘t replace cylinder capacity with anything else, except more cylinder capacity.

5
Technical Aspects
120 Volt Technology - Diagrams
These diagrams clearly show the advantages of our 120-volt technology in comparison to
other circuits with a lower operating voltage. The direct relation between operating level
and maximum level is fundamental for the classification: the higher the operating level,
the higher the maximum level a circuit can handle. And since virtually all essential acous-
tic and musical parameters depend on this relation, a higher operating voltage also has a
positive impact on the dynamic range, distortion limit and signal-to-noise ratio. The result
is a clearly more laid-back and natural sound with less unpleasant coloring.
Do bear in mind that dB scales do not represent linear but rather exponential increases. A
3 dB increase corresponds to doubling the acoustic power, +6 dB correspond to twice the
sound pressure level, and +10 dB correspond to twice the perceived loudness.
When it comes to volume, the 120-volt technology exhibits a performance that is twice
that of common components and circuits, in regard to maximum level and dynamic range,
with values that are approximately 10 dB higher. THD measurements of the SPL op-amps
show a difference of more than 3 dB compared to the OPA134 at 36 V — in terms of sound
pressure level, that corresponds to an improvement of more than 50%.
The operating level most commonly used for audio equipment is 30 volts.
120
125
130
135
140
145
dBu Dynamic Range
OPA 134@30 VOPA 134@36 VSPL-OP@120 V
124,2
129,1
141,4
0
5
10
15
20
25
30
35
dBu
OPA 134@30 VOPA 134@36 VSPL-OP@120 V
21,5 22,5
33,2
Maximum Levels
0
20
40
60
80
100
120
Volt
+/- 15 Volt +/- 18 Volt +/- 60 Volt
30 V
36 V
120 V
Operational Voltages
-115
-113
-111
-109
-107
-105
dBu TL 071@30 VOPA 134@36 VSPL-OP@120 V
106
111,7
114,2
THD&N

6
Installation
Voltage Selection
Before connecting the Gemini Mastering M/S Processor to the mains, make sure that the
voltage selection corresponds to the values of your local power grid (230 or 115 volts).
Inside the power connector, to the right, next to the on/off switch, there is an opening
that displays the voltage selected. If the voltage indicated does not correspond to the one
required, change it by following this procedure:
Open the power connector lid with a small screwdriver (use the tiny slots on the right hand
side). Use the screwdriver to lever the red fuse holder from above until you can grab it.
Take the fuse holder out and replace the fuse with one corresponding to the local power
grid specifications. You can find the adequate values on the rear of the unit or on page 16
of this user‘s manual. Turn the fuse holder around 180 degrees and place it back again.
When you close the lid again, you should see the correct voltage displayed in the opening.
On the product site on our website (https://gemini.spl.audio) you will find a video con-
cerning the topic “Changing the mains voltage”. If you ever have to exchange a fuse, we
recommend the video “Exchange defective fuses”.
First Steps
Before turning on the Gemini Mastering M/S Processor you must first connect the included
3-pin power cord to the 3-pin IEC socket. The transformer, power cord and IEC socket all
comply to the VDE, UL and CSA regulations.
The Gemini Mastering M/S Processor should not be installed in close proximity to equip-
ment that emits magnetic fields or emanates heat. Avoid exposure to heat, moisture,
dust, and vibrations. Do not install the Gemini Mastering M/S Processor close to any
power amps or digital processors. Instead, install it in a fully “analog rack” where any
interferences can be avoided (Word Clock, SMPTE, MIDI etc.).
The unit should be powered off before connecting or disconnecting any cables or equip-
ment to it.
Use the On/Off switch on the rear panel to turn the unit on or off. The illuminated red LED
in the middle of the front panel indicates the unit‘s operating status. The On/Off switch
was placed on the rear panel to avoid any emissions due to voltage-carrying conductors
running across the unit and affecting sound. When powering on or off, there‘s no need
to observe a specific sequence regarding the connected devices. However, like with any
audio signal chain, power amplifiers should always be powered on last and powered off
first. The Gemini Mastering M/S Processor can be powered on and off with the use of a
circuit breaker, as long as the total load does not exceed the rating of the latter.

7
Cabling: Rear Side
XLR inputs and outputs
We used exclusively Switchcraft/Neutrik XLR input and output plugs to guarantee perfect
connectivity in the studio. They provide an optimal connection thanks to their electrome-
chanical design and large contact surface.
The image shows the XLR connectors pinout. They are balanced and have three conduc-
tors or wires. Conductor 2 (Pin 2) corresponds to the (+) or hot Signal.
In case an unbalanced connection is necessary, the correct polarity of the conductors
needs to be observed.
Ground Lift switch to avoid ground loops
On the rear panel of the Gemini Mastering M/S Processor (see page 8) is also a „GND
LIFT“ (Ground Lift) switch to avoid any ground loops. Ground loops take place when gear
connected in the same network have different potentials
The GND LIFT switch disconnects the equipment ground from the service ground to avoid
such problems. The Ground Lift function is activated (= equipment ground disconnected)
when the switch is depressed.

8
Cabling: Rear Side
56
230
1. Remove Fuse Holder
2. Exchange Fuses
3. Flip Over
4. Reinstall
GND LIFT
GND LIFT
FUSES
VOLTAGE SELECT
GND LIFT
GND
115V:
T 2 A L 250V
230V:
T 1 A L 250V
LR
RL
INPUTS
INPUTS
MIDSIDE
SIDEMID
SENDS
SENDS
MIDSIDE
SIDEMID
RETURNS
RETURNS
LR
RL
OUTPUTS
OUTPUTS
MADE IN GERMANY
Gemini
Model 1720
Serial
Number
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
RISQUE DE CHOC ÉLECTRIQUE
NE PAS OUVRIR
ATTENTION
~115 V AC/~230 V AC; 50 Hz/60 Hz; P max. 60 W
1 Inputs
Gemini provides two balanced inputs labeled as Inputs. These are female XLR jacks.
Connect the stereo signal, which is supposed to be processed with the Gemini, to these
inputs. Connect the left channel to INPUL L and the right channel to INPUT R.
2Sends
Through both unbalanced output jacks, XLR male, Gemini sends the signal to a device or a
collection of devices, with whom the signal can be processed. Connect the left channel to
SEND MID and the right channel to SEND SIDE.
1 Inputs
2Sends
3 Returns
4 Outputs
5 Ground-Lift (see details on page 7)
6 Voltage (see details on page 6)

9
Cabling: Rear Side
We also provide a Screenshow video manual on the product page on our website:
https://gemini.spl.audio
3 124
230
1. Remove Fuse Holder
2. Exchange Fuses
3. Flip Over
4. Reinstall
GND LIFT
GND LIFT
FUSES
VOLTAGE SELECT
GND LIFT
GND
115V:
T 2 A L 250V
230V:
T 1 A L 250V
LR
RL
INPUTS
INPUTS
MIDSIDE
SIDEMID
SENDS
SENDS
MIDSIDE
SIDEMID
RETURNS
RETURNS
LR
RL
OUTPUTS
OUTPUTS
MADE IN GERMANY
Gemini
Model 1720
Serial
Number
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
RISQUE DE CHOC ÉLECTRIQUE
NE PAS OUVRIR
ATTENTION
~115 V AC/~230 V AC; 50 Hz/60 Hz; P max. 60 W
3Returns
Additionally, Gemini provides two balanced input jacks, XLR female, labeled as Returns.
Connect the left channel to RETURN MID and the right channel to RETURN SIDE. Send and
Return together make up the insert of Gemini Mastering M/S Processor. With this insert,
external processors for further signal processing can be used. The signal is sent through
the Send to an external processor and sent back through the Return.
4 Outputs
With both balanced outputs, XLR male, labeled as Outputs, the signal, which is processed
with Gemini is sent back to the original signal path. Connect the left channel to Output L
and the right channel to Output R.

10
Cabling: Rear Side
Pairing Gemini and DMC
~115 V AC/~230 V AC; 50 Hz/60 Hz; P max. 100 W
VOLTA GE Selection:
1. Remove Fu se
Holder
2. Exch ange Fuses
3. Flip Ov er
4. Reinst all
DMC
Serial
Number
RISK OF ELE CTRIC SHOCK
DO NOT OPEN
CAUTION
RISQUE DE CHOC ÉLECTRIQUE
NE PAS OUVRIR
ATTENTION
Made in Germany
LR
L R
INPUT 4
INPUT 4
LR
L RL RL R
LR
PHONITOR/HP OUT
PHONITOR/HP OUT
LR
L R
LR
LR LR
LR LR
L R
L R
L R
L R
INPUT 1INPUT 2INPUT 3
INPUT 1 INPUT 2 INPUT 3
RECORDING OUT 2
RECORDING OUT 2
INSERT RETURNINSERT SEND
INSERT RETURN
SUB/MONO
SUB/MONO
LFE fr. MC16
LFE fr. MC16
SUB/MONO
SUB/MONO
GPI
GPI
GND LIFT
INSERT SEND
LR LR
L R L R
L/R from MC16
L/R to MC16
L/R from MC16 L/R to MC16
RECORDING OUT 1
RECORDING OUT 1 METERING OUTPUTS
METERING OUTPUTS
L R Mono
LR
Tip–Sleeve:
Close
Ring–Sleeve:
Open
SUB/M ONO
GND LIFT
Mono
AUDIO
FEEDS
TO &
FROM
MC16
GND LIFT
GND
FUSES
SUB/M ONO
FUSES
115V:
T 2 A
L 250V
230V:
T 1 A
L 250V
Mono
Mono
Mono
Mono
SUBSPEAKER D
LR
L R
SPEAKERS C
SPEAKERS C
LR
L R
SOURCE 1
SOURCE 1
LR
L R
SOURCE 2
SOURCE 2
LR
L R
SOURCE 3
SOURCE 3
LR
L R
SOURCE 4
SOURCE 4
LR
L R
SPEAKERS B
SPEAKERS B
LR
L R
SPEAKERS A
SPEAKERS A
SUB SPEAKER D
230
Inserting a processor
GND LIFT
GND LIFT
GND LIFT
GND
INPUT 1
INPUT 1
OUTPUT 1
OUTPUT 1
INPUT 2
INPUT 2
OUTPUT 2
OUTPUT 2
TO REDUCE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EX POSE THIS UNIT RAIN OR MOISTURE .
DISCONNECT MAINS BEFORE REMOVING COVER.
THIS EQUIPMENT MUST BE EARTHED.
AC MAINS
AC MAINS
XLRs:
Balanced +4dBu
1 = GND
2 = HOT (+)
3 = COLD (–)
WARNING
AVIS: RISQU E DE CHOC ÉLECTR IQUE • NE PAS OUVRIR
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
Serial
Number
Made in Germany
~ 115V AC / ~230V AC, 50 Hz / 60 Hz, P max . 45W
Fuses:
Voltage Selection:
115V A C: T 1 A L 250 V
230V AC: T 500 mA L 250 V
1. Remove Fuse Holder
2. Change Fuses
3. Flip Over
4. Reinstall
PASSEQ
230

11
Cabling: Rear Side
Pairing Gemini and Hermes
Hermes and Gemini Mastering M/S Processor operate in their complete range of func-
tions as stand-alone devices. A pairing of Hermes and Gemini enables lots of further
possibilities.
If the M/S Encoder and Decoder stages of Gemini are each paired with an insert of
Hermes, it is possible to freely choose a position for the M/S Encoder and Decoder
within the processing chain. This way, it is possible (see image below) to place the M/S
Encoder on the third position, an equal- izer on the fourth to use it for separate proces-
sing of the mid and side signal and then use the M/S Decoder stage of the Gemini on
the fifth position to generate an L/R stereo signal. If you now like to additionally use a
compressor, as a further device for M/S processing, you can place it on position 5 and
the M/S Decoder stage would thus move to position 6.
1
-
8
-
7
-
-
6
5
M/S
Decoder
4
Equalizer
3
M/S
Encoder
2
-
LLMMLLL
RRSSRRR
1
-
8
-
7
-
6
5
M/S
Decoder
4
Equalizer Compressor
3
M/S
Encoder
2
-
LLMMMLL
RRSSSRR

12
Control Elements
234 5 61
Filter &
Width
E
L
L
I
P
T
I
C
F
I
L
T
E
R
Solo
Balance
& Trim
Active
Solo
mastering
m/s
processor
Gemini
T
R
I
M
S
T
E
R
E
O
W
I
D
T
H
dB
Hz
dB
Insert
Insert
120 V DC Audio Rail
MIDM/S
SIDE
Model 1720
-
2
.
5
-
2
.
0
-
1
.
5
-
1
.
0
-
0
.
5
0
0
.
5
1
.
0
1
.
5
2
.
0
2
.
5
3
.
5
3
.
0
2
.
4
1
.
5
0
.
7
0
0
.
7
1
.
5
2
.
4
3
.
0
3
.
5
2
2
2
5
3
3
5
5
1
0
5
1
2
0
1
5
0
2
1
0
3
2
0
3
9
0
4
5
0
-
5
.
5
-
5
.
0
-
3
.
5
-
2
.
0
-
1
.
0
0
1
.
0
2
.
0
3
.
6
5
.
0
5
.
5
dB
B
A
L
A
N
C
E
1Active
2 Insert (MID)
3 Solo (MID)
4 Balance & Trim
5 Balance
6 Trim
1Active
With this button, you activate the M/S Matrix of Gemini. If the button lights up, the M/S
Matrix is active. Before the insert Send in Gemini an M/S encoding takes place and after
the insert Return an M/S decoding. All further buttons and controls of Gemini are also
functioning. If the M/S Matrix is not activated with this button, an M/S encoding and M/S
decoding does not take place. Devices connected to the insert are fed with the regular
L/R stereo signal. All further buttons and controls of Gemini have no effect on the audio
signal in this case.
2 Insert (MID)
If the INSERT button in the MID section is activated, the device connected to the insert
MID is inserted into the signal path (Insert Send: MID Send, Insert Return: MID Return).
With this device, you can only process the mid part of the M/S signal. The mid signal (MID)
is the sum of the left and the right channel of the stereo signal (L+R), hence the “in-phase
part” of the stereo signal. The insert is located after the BALANCE control, though before
the TRIM control. Therefore, the mix balance can be corrected before the inserts and level
differences can be balanced after the inserts.

13
Control Elements
We also provide a Screenshow video manual on the product page on our website:
https://gemini.spl.audio
987
1011
Filter &
Width
E
L
L
I
P
T
I
C
F
I
L
T
E
R
Solo
Balance
& Trim
Active
Solo
mastering
m/s
processor
Gemini
T
R
I
M
S
T
E
R
E
O
W
I
D
T
H
dB
Hz
dB
Insert
Insert
120 V DC Audio Rail
MIDM/S
SIDE
Model 1720
-
2
.
5
-
2
.
0
-
1
.
5
-
1
.
0
-
0
.
5
0
0
.
5
1
.
0
1
.
5
2
.
0
2
.
5
3
.
5
3
.
0
2
.
4
1
.
5
0
.
7
0
0
.
7
1
.
5
2
.
4
3
.
0
3
.
5
2
2
2
5
3
3
5
5
1
0
5
1
2
0
1
5
0
2
1
0
3
2
0
3
9
0
4
5
0
-
5
.
5
-
5
.
0
-
3
.
5
-
2
.
0
-
1
.
0
0
1
.
0
2
.
0
3
.
6
5
.
0
5
.
5
dB
B
A
L
A
N
C
E
7 Insert (SIDE)
8 Solo (SIDE)
9 Filter & Width
10 Stereo Width
11 Elliptical Filter
3 Solo (MID)
If the SOLO button of the MID section is activated, you can only hear the mid part of the
M/S signal. If the SOLO button of the SIDE section is activated, the MID Solo function ist
automatically deactivated. This gives you the opportunity to comfortably switch between
the monitoring of the M/S mid signal and M/S side signal.
4 Balance & Trim
With this button, you can activate the fuctions BALANCE and TRIM. If the button is activa-
ted, functions BALANCE and TRIM with their corresponding controls are in the signal path
of the processor.

14
Control Elements
5 Balance
With the BALANCE control, you can perfectly place the mid part of the stereo signal in
the center of the stereo. The BALANCE control features a very high-resolving radius of
+/- 3.5dB. When hard left, the mid signal is shifted to the left by 3.5dB within the stereo
signal. When hard right accordingly to the right side.
6Trim
With the TRIM control, you can adjust the level of the mid signal. The TRIM control has a
resolution of +/- 2.5dB. When hard left, the mid signal is reduced by 2.5dB and when hard
right it is increased by 2.5dB.
7 Insert (SIDE)
If the INSERT button in the SIDE section is activated, the device connected to the insert
SIDE is inserted to the insert (Insert Send: SIDE Send, Insert Return: SIDE Return). With
this device, you can only process the side part of the M/S signal. The side signal (SIDE) is
the difference of the left and the right channel of the stereo signal (L+R), hence the “out-
phase part” of the stereo signal. The insert is located before the ELLIPTICAL FILTER and
the STEREO WIDTH control.
8 Solo (SIDE)
If the SOLO button of the SIDE section is activated, you can only hear the side part of the
M/S signal. Only one of both SOLO buttons in the MID and SIDE section can be active at
the same time. This gives you the opportunity to comfortably switch between the monito-
ring of the M/S side signal and M/S mid signal.
9 Filter & Width
With FILTER & WIDTH button, the functions ELLIPTIC FILTER and STEREO WIDTH (including
associated controls) can be routed into the signal path. If this button is not active, the
controls ELLIPTICAL FILTER and STEREO WIDTH have no assigned function. To exclusively
remove the ELLIPTICAL FILTER function from the signal path, push the FILTER & WIDTH
button for about two seconds. As soon as the button starts blinking, the button only turns
on or off the STEREO WIDTH function. The ELLIPTICAL FILTER is always deactivated! If you
push the FILTER & WIDTH button again for about two seconds, you return to the regular
button mode.

15
Control Elements
10 Stereo Width
With the STEREO WIDTH control, you can increase or attenuate the level of the side signal
by 5.5dB. This way, you can change the perception of the stereo width.
11 Elliptical Filter
The ELLIPTICAL FILTER (Cauer Filter) removes signal components below a predefined fre-
quency from the side signal. You can then hear these signal component through the M/S
decoding in the mid signal component. The ELLIPTICAL FILTER has an extremely steep
slope. The cut-off frequency can be adjusted from 22Hz up to 450Hz.

16
Specications
Measurements
Inputs
Max. Input Level ...................................................................... + 32.5 dBu
Input Impedance ...................................................................... 20 kOhms (bal.)
Outputs
Max. Output Level .................................................................... + 32.5 dBu
Output Impedance .................................................................... ‹ 100 Ohms (bal.)
Noise (A-weighted, Insert, Balance & Trim, Filter & Width = active) ........ - 98.2 dBu
THD & N (at +20dBu) ..................................................................... › -110 dBu
Common-Mode-Rejection (at 0 dBu) .............................................. › -79 dB
Transmission Bandwidth: 10 Hz-150 kHz
Power Consumption: ..................................... 0.11 Amp, 230V/50Hz, 24 Watt, 32 VA
0.22 Amp, 115V/60Hz, 24 Watt, 32 VA
Fuses ........................................................... 230 V/50 Hz: 0.5 Amp
115 V/60 Hz: 1 Amp
Dimensions
Standard EIA 19 Inch Housing/1U ....... 482 x 44 x 300 mm / ca. 19" x 1.73" x 11.8"
(front panel excl.)
Weight ............................................... 5 kg / 11 lb

17
Security Advices
Connections
Only use the connections as described. Other connections can lead to health risks and
damage the equipment.
Water and humidity
Do not use this device anywhere near water (for example in a bath room, a damp cellar,
near swimming pools, or similar environments). Otherwise your are dealing with an
extremely high risk of fatal electrical shocks!
Insertion of objects or fluids
Be careful to not insert any object into any of the chassis openings. You can otherwise
easily come into contact with dangerous voltage or cause a damaging short circuit. Never
allow any fluids to be spilled or sprayed on the device. Such actions can lead to dangrous
electrical shocks or fire!
Ventilation
The vent openings on the unit are meant to avoid the Gemini from overheating. You should
never cover nor block these openings.
Power Supply
Power the unit exclusively with the voltage rating specified on the unit. In case of doubt,
contact your local dealer or electric provider. Disconnect the unit from the electric power
grid if you are not going to use it for a long period of time. Unplug the power chord from
the mains to cut power supply to the unit. Always make sure that the mains plug is easily
accessible.
Opening the unit
Simply put: DON‘T, if you are not a certified SPL technician or engineer. Really: Do not
open the device housing, as there is great risk you will damage the device, or – even after
being disconnected – you may receive a dangerous electrical shock!
Cord protection
Make sure that your power and audio signal cords are arranged to avoid being stepped on
or any kind of crimping and damage related to such event. Do not allow any equipment or
furniture to crimp the cords. Power connection overloads: Avoid any kind of overload in
connections to wall sockets, extension or splitter power cords, or signal inputs. Always
keep manufacturer warnings and instructions in mind. Overloads create fire hazards and
risk of dangerous shocks!
Lightning
Before thunderstorms or other severe weather, disconnect the device from wall power;
do not do this during a storm in order to avoid life threatening lightning strikes. Similarly,
before any severe weather, disconnect all the power connections of other devices and
antenna and phone/network cables which may be interconnected so that no lightning
damage or overload results from such secondary connections.

18
Security Advices
Controls and switches
Operate the controls and switches only as described in the manual. Incorrect adjustments
outside safe parameters can lead to damage and unnecessary repair costs. Never use the
switches or level controls to effect excessive or extreme changes.
Repairs
Unplug the unit from all power and signal connections and immediately contact a quali-
fied technician when you think repairs are needed – or when moisture or foreign objects
may accidentally have reached inside the housing, or in cases when the device may have
fallen and shows any sign of having been damaged. This also applies to any situation in
which the unit has not been subjected to any of these unusual circumstances but still is
not functioning normally or its performance is substantially altered. In cases of damage
to the power supply and cord, first consider turning off the main circuit breaker before
unplugging the power cord.
Replacement/substitute parts
Be sure that any service technician uses original replacement parts or those with identical
specifications as the originals. Incorrectly substituted parts can lead to fire, electrical
shock or other dangers, including further equipment damage. Safety inspection: Be sure
always to ask a service technician to conduct a thorough safety check and ensure that the
state of the repaired device is in all respects up to factory standards.
Cleaning
Do not use any solvents, as these can damage the chassis finish. Use a clean, dry cloth (if
necessary, with an acid-free cleaning oil). Disconnect the device from your power source
before cleaning
Notes on Environmental Protection
At the end of its operating life, this product must not be disposed of with regular
household waste but must be returned to a collection point for the recycling of electrical
and electronic equipment. The wheelie bin symbol on the product, user‘s manual and
packaging indicates that. The materials can be reused in accordance with their markings.
Through reuse, recycling of raw materials, or other forms of recycling of old products,
you are making an important contribution to the protection of our environment. Your local
administrative office can advise you of the responsible waste disposal point.
WEEE Registration: 973 349 88.
This manual suits for next models
3
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