SA-31MK - Audio Amplifier VINCENT - Free user manual and instructions

USER MANUAL SA-31MK VINCENT

Instructions for use

english

we thank you for the confidence you prove in purchasing our product. It will match your high demands towards sound and manufacturing quality. Though it is understandable that you want to plug and play this product instantaneously, we encourage you to read this manual carefully before installation.

It will help you in handling and operating this machine in your system and obtaining the best possible performance, even if it was installed by your dealer.

Please follow the security precautions, though some of those things may seem obvious.

In the appendix to this manual you will find a glossary explaining some established technical terms.

If there are open questions your audio specialist dealer will help you. He also represents your contact person in case of needed warranty service or repairs after the warranty period and is interested to hear from your experiences with Vincent products.

We wish you plenty of joy with your / our product,

your Vincent-Team

Cher client,

Other instructions 21

Included in delivery 22

Description of the appliance 22

Remote control 25

Installation 27

Operating the appliance 30

Tips 32

Search for errors 33

Technical specifications 34

Glossary 35

english

This appliance was produced under strict quality controls. It complies with all established international safety standards. Nonetheless, the following instructions should be fully read and observed in order to prevent any hazard:

Do not open the appliance! Risk of electric shock!

There are no parts in the appliance that require maintenance by the user.

Maintenance/Alterations

All equipment that is connected to the domestic mains voltage can be dangerous to the user if not handled properly. Leave maintenance work to qualified professionals. The product is only permitted for connection to AC 230Volt/50Hz, for earthed sockets and use in enclosed areas. Altering the product or manipulating its serial number voids the warranty. After a fault, leave the appliance's fuse to be replaced only by a professional with one of the same kind.

Power Cable Connection

Always pull the plug and never the power cable if you want to disconnect the appliance from the mains power. Make sure when setting up the appliance that the power cable is not squashed, severely bent or damaged by sharp edges. Do not touch the power lead with wet or damp hands. Use the power cable supplied or another one from Vincent.

Switching Off

Switch the appliance off every time before you connect or remove other components or loudspeakers, disconnect or connect it to the mains power, leave it unused for a longer period or want to clean its outside. On all amplifiers and receivers, wait approx. 1 minute after this before disconnecting or reconnecting the cable.

Moisture/Heat/Vibration

Contact of electrically operated equipment with liquids, moisture, rain or water vapour is dangerous for such equipment and the user and must be avoi

ded without fail. Take care that no liquids or objects get inside the appliance (ventilation slots etc.). It must be disconnected from the mains power immediately and examined by a professional if this happens. Never expose the appliance to high temperatures (direct sunshine) or strong vibration.

Heat Build-up

Make sure that a gap of 5cm remains around the appliance and that the surrounding air can circulate (do not install in enclosed cupboards). Vents must not be covered up.

Volume

The maximum tolerable volume is always reached well below the maximum possible setting on the amplifier. Be careful with the volume setting, therefore, in order to prevent damage to hearing. So that you do not expose yourself to high volumes unintentionally, always set to a low level before changing the input channel.

Cleaning

Pull out the power plug before cleaning the outside of the product. Whenever possible, use a soft, lint-free cloth that has been dampened. Do not use abrasives, solvents, thinners, flammable chemicals, polishes and other cleaning products that leave marks.

Batteries

Take note of the instructions for using batteries in the chapter "Remote Control".

OTHER INSTRUCTIONS

Setting up the appliance

How the system is set up has an effect on the sound quality. Therefore only place it on a suitable, stable surface. To make the most of your system's sound quality, we recommend placing the equipment on Vincent racks and not putting them on top of each other.

Old electronic equipment

This appliance is subject to the conditions set out in the European Directive 2002/96/EC. This is identified by the symbol of a crossed out waste bin on the appliance.

What this means for you as a consumer: All old electrical and electronic equipment that is no longer used must be disposed of separately from domestic waste using places provided by the authorities. By doing so you can prevent damage to the environment and help to encourage manufacturers to produce more durable or reusable products. For further information about disposing your old appliance, please consult your local authority, waste disposal agency or the shop where you bought the product.

CE sign

This appliance complies with the current EU directives about attaining the CE mark and thus meets the requirements for electrical and electronic equipment (EMC regulations, safety regulations and regulations for low voltage equipment).

Declarations

This document was written by Andreas Böer. It is a product of Sintron Vertriebs GmbH, 76473 Iffezheim and may not be copied or distributed partly or in full without express, written consent.

Vincent is a registered trademark of Sintron Vertriebs GmbH, 76473 Ilfezheim.

Vincent works continually to improve and develop its products. Therefore, the appearance and technical design of the appliance are subject to changes, as long as they are in the interest of progress.

The content of these instructions is for information purposes only. It can be changed at any time without prior notice and does not constitute any obligation on the part of the trademark's owner. The latter assumes no responsibility or liability for errors or inaccuracies, which may be included in these operating instructions.

Storage of the packaging

We strongly recommend that you keep the original packaging in case you need to transport the equipment again at a later date. Transport damages are mainly caused by improper packaging of the HiFi-devices. Because the original packaging fits the equipment accurately it will reduce the risk of damage if transport is necessary.

Explanation of the symbols

The lightening bolt tells you that dangerous voltages are present in the appliance, which can cause an electric shock.

This symbol brings your attention to particularly important information regarding operation and maintenance.

This symbol identifies useful information and advice about how to handle the appliance.

INCLUDED IN DELIVERY

Please check the contents of the packaging, which in addition to the appliance should contain the following accessories:

1 power cable
- 1 stereo set of RCA cables to connect the main amplifier
- 1 remote control "SRC-1"
- 2 battery cells size AAA (LR3)
- this manual

DESCRIPTION OF THE APPLIANCE

Despite the fact that development is constantly moving in the direction of digital audio format and towards audio video systems with an increasing number of channels, high quality stereo systems still enjoy a large degree of popularity. Recent trends also have not brought any changes concerning the advantages of separate pre-/main amplifier systems over integrated amplifiers.

The SA-31MK is a remote controllable stereo preamplifier within the Vincent range. The amplifier circuitry of this preamplifier combines the advantages of both transistor amplifiers and tube amplifiers. The outcome from the elaborate development work is a preamplifier, which does not only

have few competitors in terms of sound quality, but also will never lose control under the most diverse connection circumstances and in connection with almost all main amplifier types. The highest manufacturing quality and excellent value for money go without saying.

This preamplifier is also the ideal partner for the main amplifiers SP-331/SP-331MK as well as DVD players, CD players, tuners, headphone amplifiers and loudspeakers from the Vincent range. In combination with the HiFi furniture and speaker cables from the range, one can build a perfectly harmonious system.

FRONT VIEW

1. INPUT: Input Selector

This dial allows you to choose one of the six inputs (named TUNER, TAPE, AV and CD). The LED (2) that is actually lit shows you what input channel has been selected.

2. LEDs displaying the input channel selection

Depending on what input channel has been selected (1), one of these LEDs is lit. Additionally these LEDs show that the appliance is switched on.

3. VOLUME: Volume dial

This is the knob for the adjustment of the main volume level of the system. The LED in this dial is blinking for some seconds while after switching on the tubes are being warmed up or while the preamplifier is muted.

4. MUTE

Press this button to mute your system's loudspeakers as an effect of muting the signals of the pre-amplifier output "OUTPUT" (13) and the recording output "REC OUTPUT" (12). After pressing this button again the original volume level is being restored.

5. SR: Infrared receiver for the remote control

6. LOUD: Loudness function

This button activates and deactivates an audio signal correction that adapts the speaker audio signal to the human auditory sensation in the lower volume range.

7. POWER

This is the main power switch for turning on and off the device. The preamplifier is separated from the mains voltage when switched off and cannot be set into a standby state.

8. TONE

If deactivated, audio signals bypass the tone control that has been set with the BASS and TREBLE dials.

9. BASS

Knob for setting the bass proportions (low frequencies) of the sound.

10. TREBLE

Knob for setting the treble proportions (high frequencies) of the sound.

REAR VIEW

11. INPUT: Terminal for stereo audio signals of the source equipment

Here you find six stereo RCA input sockets for source equipment with analogue stereo (line level) audio output.

12. REC OUTPUT: Output connectors assigned to a recording device

If desired, you can connect a recording device like a CD recorder or a tape recorder to this output. The stereo signal of this output is identical to the output signal of the selected audio source at one of the preamplifier inputs. It is independent of the volume control, tone control and the loudness function. As long as the preamplifier is muted (4)(16), this output does not give the music signal.

13. OUTPUT: preamplifier outputs

With these two pairs of connectors you can connect the preamplified stereo audio signal of the currently selected source to the power amplifier channels. The volume, bass, treble, tone, mute and loudness settings have effect on the signal at this output.

14. FUSE: Fuse holder

This small plastic housing holds the fuse. Refer to the security precautions.

15. AC: Power Connector

To establish the power supply, connect the plugs of the power cable to the device and to a suitable wall outlet.

REMOTE CONTROL

Point the front of the remote control directly at the front of the appliance, making sure there are no objects between the remote control and the appliance.

The distance between the remote control and the appliance should not be more than 7m as the reliability of the remote control is affected beyond this range.

Make sure that you do not point the remote control at an angle to the appliance, as beyond an angle of ± 30^ to the centre axis the appliance may not respond as well to the remote control.

Change both batteries if the distance at which the remote control can be used effectively decreases.

BATTERIES

Using batteries

Handling batteries incorrectly can cause battery acid to escape or an explosion in extreme cases. The batteries must be correctly inserted taking note of the polarity, which is marked in the inside of the battery compartment.

In order to make full use of the batteries' life, do not mix new and used batteries. Make sure that you insert batteries of the same type.

Some batteries are rechargeable, others are not however. Take note of the precautions and instructions that are included on all batteries.

Remove the batteries if the remote control is not going to be used for a long time.

Under no circumstances must batteries be short-circuited, taken apart or heated up.

For environmental reasons, used batteries should be disposed of in accordance with local environmental regulations and not put with domestic waste.

Only use AAA (LR3) size batteries.

Changing/Inserting batteries:

a) Open and remove the battery compartment lid of the remote control by tugging sharply on the fishplate on the edge of the remote control. The battery compartment lid is held in place magnetically, there is no need to loosen the screws!

b) If necessary, remove used batteries and insert new ones correctly as shown by the diagram in the battery compartment.

c) Put the compartment cover back on and close the battery compartment.

BUTTONS OF THE REMOTE CONTROL

16. MUTE

Pressing this button once cuts the signals at the outputs "OUTPUT" (13) and "REC OUTPUT" (12) so that the system's loudspeakers are muted. Pressing it again returns to the original volume.

17. Input selector buttons

Select the input source you want to listen to with these buttons.

These buttons change the amplifier's volume level for the preamplifier outputs "OUTPUT" (13).

INSTALLATION

Set up the cable links in a sequence as follows. Connect the power cable between device and power supply only after all other connections have been made.

DURING INSTALLATION PLEASE OBSERVE THE FOLLOWING ADVICE:

Protective caps

Prior to the first installation the protective plastic caps must be removed from all the connections used at the rear of the unit.

Cable connections

Make sure that all plugs fit tightly. Inadequate connections can cause noise interference, failures and malfunctions.

RCA connections

Mechanically identical RCA plugs are available for analogue and digital outputs. Make sure that you do not get these connections confused during installation!

Make sure that you do not mix up the analogue connectors for right and left. The RCA plugs for these are mostly colour coded as follows: red for the right channel, black or white for the left channel.

To make the most of the components' sound potential, only high quality loudspeakers and connecting cables, for example Vincent cables, should be used. Your local stockist will be glad to advise you about this.

Contacting the middle pin of the RCA plugs with the outer ring of the RCA chassis jack may lead to damages to the main amplifier if it is switched on! To avoid this hazard, connect or disconnect only in switched-off state and more than one minute after deactivating!

Check whether the wall socket provides the appropriate mains power, which is the case if it is supplied with 230V AC 50Hz . Push the plug on the power cable supplied firmly into the power socket on the back of the appliance. Plug the other end of the power cable into a mains socket.

CONNECTION OF THE SOURCE EQUIPMENT

Connect the outputs of the source appliances to the inputs "S1"..."S6" (11) of this preamplifier. You can connect up to six devices with analogue stereo high level output such as a CD player in order to provide the audio signals of your input sources to the system. The output sockets on the source equipment are usually indicated by "Line Out", "Audio Out" or "Front Out". You will find information about ways to connect source equipment in their operating manuals. The audio inputs "S1"..."S6" (11) represent electrically equivalent standard high level inputs with RCA connection. They have an identical function and differ only in name.

General hints:

To use a record player you need a so-called phono preamplifier (also called an equaliser preamplifier), which is installed in the signal path between the record player and one of the high-level inputs. Some models of record player already include this preamplifier and can be connected directly. You will find further information in this appliance's operating manual.

The stereo sound of appliances that use output connectors other than RCA (DIN plugs, jack plugs) can often also be used with the aid of adaptors.

CONNECTION OF A RECORDING DEVICE

If you want, you can use the RCA sockets "REC OUTPUT" (12) on the back of the appliance to connect an analogue stereo recording device (e.g. CD recorder, cassette recorder etc.) or another appliance that is intended for receiving the unchanged, fixed stereo output level (line level) from the signal source selected on the amplifier at any given time. The output level is independent from the volume and tone settings (BASS, TREBLE, TONE, LOUD).

Connect this signal output to the signal input ("LINE IN", "TAPE IN" or "REC IN") on the recording appliance using RCA cables. Please note that some recording equipment can have a slightly detrimental effect on the audio signal quality. Some recording devices have rather low input impedance, which can slightly alter the input signal voltage. For maximal music enjoyment we recommend that you connect to the "REC" terminal only for as long as the recording is actually being made.

CONNECTION OF ONE OR MORE POWER AMPLIFIERS

This preamplifier has two stereo preamplifier outputs with RCA connectors for the main amplifier channels. In this way it is possible to drive four loudspeakers or bi-amp one pair of loudspeakers. The main amplifiers supply the system's loudspeakers and the loudspeakers are connected to the outputs of these. Instead of each stereo main amplifier shown here you can alternatively use two mono main amplifiers.

Connection of one pair of speakers:

In this case you will need two main amplifier channels, for example one stereo main amplifier. Connect both sockets named "1" in the field "OUTPUT" with the RCA input sockets of the main amplifier channels (often marked as "INPUT" or "POWER AMP IN"). For this you need RCA cables. Please pay attention not to interchange right with left channels. The letters "R" and "L" indicate the correct correlation. You may further use the SA-31MK preamplifier output marked with "2" for a headphone amplifier.

Also select this type of main amplifier connection if you want to connect one speaker pair for bi-wiring.

Connection of two pairs of speakers:

Four main amplifier channels are required in this case, e.g. two stereo main amplifiers. Connect both sockets named "1" in the field "OUTPUT" with the RCA input sockets of the main amplifier channels for the first pair of speakers. Additionally connect the two sockets of the RCA combination marked with "2" within the SA-31MK "OUTPUT" terminal area with the RCA input jacks of the main amplifier channels for the second pair of speakers. The input jacks of main amplifiers are often marked as "INPUT" or "POWER AMP IN". Please pay attention not to interchange right with left channels. The letters "R" and "L" indicate the correct correlation. Your specialist dealer will advise you of this on request.

Also select this type of main amplifier connection if you want to connect a pair of speakers for bi-amping. Therefore four main amplifier channels are required, e.g. two stereo main amplifiers.

OPERATING THE APPLIANCE

Operation	Button(s)	Description
Switch on and off	POWER (7)	The preamplifier is switched on and off using this button at the front panel. It has no standby option. When switched off the device is internally separated from the AC power. As a precaution, after switching on, the volume setting of the preamplifier should be reduced. After switching on, the device needs a few seconds before it is ready to operate. Meanwhile, the LED in the speaker's knob (3) will be blinking. During power-on mode, one of the LED for the input selection (2) will be lighted.
Select an input	INPUT (1)Input keys (17)	At the front panel: If you turn the dial "INPUT", you select one of the devices connected to the inputs on the back of the SA-31MK (11) for playback. Using the remote control: A short touch on the button for the desired input channel (e.g. "S1") changes to the playback of the audio source connected there.The LED associated to the selected input channel will be illuminated at the front of the appliance. Before switching over the input channel, the volume (3)(18) should be turned down as a precaution!
Change the volume	VOLUME (3)VOLUME▲/▼ (18)	At the front panel: Turn the knob "VOLUME" clockwise to turn up the volume and counter-clockwise to turn it down.Using the remote control: Press and hold the button "VOLUME▲" to raise its value. Use "VOLUME▼" to lower the volume level.The volume setting does never influence the signal at the output "REC OUT-PUT" (12).
Mute the preamplifier output	MUTE (4)(16)	The MUTE function can be activated or deactivated at the front panel as well as with the remote control. It switches off the preamplifier outputs "OUT-PUT" (13) and the recording output "REC OUTPUT" (12). The LED in the volume knob will be blinking during mute mode. Pressing one of these buttons again restores the volume to its original setting.
Change the treble proportions of the sound	TREBLE (10)	With the "TREBLE" control dial on the front of the device you affect the proportion of higher frequencies in the sound. Turning it in clockwise direction increases the treble intensity and moving it in anticlockwise direction reduces it. In the middle setting the treble proportions of the input signals remain unchanged. The adjustment of the treble control only has an effect if the button "TONE" (8) has been pressed. The signal of the output "REC OUT-PUT" (12) is independent of this.
Change the bass proportions of the sound	BASS (9)	With the "BASS" control dial on the front of the device you affect the proportion of lower frequencies in the sound. Turning it in clockwise direction increases the bass intensity and moving it in anticlockwise direction reduces it. In the middle setting the bass proportions of the input signals remain unchanged. The adjustment of the bass control only has an effect if the button "TONE" (8) has been pressed. The signal of the output "REC OUTPUT" (12) is independent of this.

OPERATING THE APPLIANCE

Operation	Button(s)	Description
Switch off tone control (BASS/TREBLE)	TONE (8)	If the sound is not to be changed, it is recommended that you switch off the sound control (BASS, TREBLE) with this button on the front of the device. When this button is pressed, the sound processing settings in the tone controllers (9)(10) come into play. If the button is not pressed, the two sound controllers in the preamplifier are bypassed and the signals from the source are not changed in terms of their frequency levels.
Switch the audio signal correction for low volume on and off	LOUD (6)	This function is operated from the front panel. It is a feature of audio amplifiers that permits the user to strengthen low and high frequencies compared with middle frequencies at the touch of a button. It thereby corrects the impression of volume at low volume. In an audio system, when the volume is small, low and high frequency ranges are insufficient because of the characteristic of human auditory sensation. This function should only be used at low volume. It has no effect on the signal of the output “REC OUTPUT” (12).

TIPS

Burn in/ Warm up

Your audio components need a certain time period until they reach maximum performance. The duration of this "warm up" time is very different for the various elements of your audio system. Higher and homogeneous sound quality is achieved while keeping the device switched on.

Your audio specialist dealer has enough experience to give you more information.

Net frequency noise

Some audio source devices may in combination with the amplifier cause a humming noise at power line frequency audible from your speakers. Usually, its volume varies with the volume setting of the amplifier. This is no sign of a defect or fault of your audio products but has to be eliminated. Generally, every wall-powered device connected to the ground wire of the power plug can cause this problem when connected to the amplifier.

Experience shows that this problem is mainly caused by antenna-connected components (as TV-sets or Tuners), personal computers, electrostatic loudspeakers, subwoofer, record players or headpho

ne amplifiers that are connected to the audio inputs of the amplifier. Another possible reason for humming noise is electromagnetic interference of other components' power supplies with pick-up systems of record players (change the place of the record player for a test).

In most electric devices the ground potentials of all signals are connected to each other at one central point, where they have one common connection. If the device uses the protective conductor of the wall outlet, the corresponding wire of the line cord is connected intractably to the metal housing of the device. This is mostly the point where the central grounding point is attached to. By doing this the housing is able to shield all signals from external radiated noise. Some main amplifiers are equipped with a "Ground Lift" switch. If it is activated, ground potential of the chassis and the protective ground wire are being separated from the central signal ground point. The protective ground wire keeps its function. Sometimes this helps prevent noise caused by errors in grounding.

If the problem occurs and cannot be solved by yourself your audio specialist dealer will help you.

SEARCH FOR ERRORS

Symptom	Possible Cause	Countermeasure
Unit does not work after pressing the power button	Mains cable is not connected to a suitable mains wall outlet.Mains cable has not been firmly inserted into wall power socket and the device's socket. Otherwise it may be defective.Unit fuse or unit is defective.	Connect to a functioning socket using a suitable mains voltage.Check the power cable. If necessary, exchange it with a suitable mains cable and push its plug firmly into wall socket and the device's power connector.Contact your dealer.
No sound on both channels although the unit is ready for use (one of the LEDs for the input selection (2) is lit).	The currently selected audio source (1)(17) is giving no signal.One of the audio settings of a connected DVD player (analogue/digital) has not been correctly selected.The output of the source device is not connec-ted or is wrongly connected e.g. not connec-ted to the selected input channel terminal of the preamplifier.Wrong input channel has been selected at the preamplifier.Volume (VOLUME) is set too low at the pre-amplifier.The amplifier is muted (MUTE function).Main amplifier(s) has/have not been connec-ted correctly to the preamplifier, is/are swi-ched off or is/are faulty.The speaker cables are not properly connec-ted to the main amplifier's terminals or are defective.	Switch on the source unit and begin playback.Correct the settings in the player's setup.Correct the connection.Set the amplifier to the input that your desired source is connected to (1)(17).Carefully increase the volume (3)(18).Deactivate mute function ("MUTE" button (4)(16)).Check the connection and ready status of the main amplifier(s) and whether it is/they are workingCHECK and tighten the speaker cables at the main amplifier and the speakers.
No audio playback on one channel	The source equipment is giving signal on only one channel.One of the signal cables between audio source and preamplifier inputs has not yet been plugged in or is defective.One or more audio signal cables between pre- and main amplifier are defect or one of the plug connections is loose.One of the speaker cables is not correctly con- nected to the main amplifier or is defective.	Check the audio source. You can try to use it at a different amplifier for a test.Check the cable connections, tighten them if necessary.Check and tighten all cable connections.Check and refasten the speaker cables at the speaker terminal of the main amplifier and at the speaker's connectors.

SEARCH FOR ERRORS

Symptom	Possible Cause	Countermeasure
Poor sound quality	The cable connections are not tight, the connectors are dirty or a cable is defective.	Check the cables and cable connections.
	The tone settings on the dials “TREBLE”, “BASS” or “LOUD” have not been selected correctly.	Check the settings selected there.
	A record player has been connected to a line level input without using a phono preamplifier.	Interconnect a phono preamplifier.
The remote control cannot perform any functions	No batteries inserted in the remote control, batteries are not inserted correctly or are depleted.	Check and replace the batteries if necessary.
	The line-of-sight between the remote control and the unit is obstructed, the range was exceeded or the hand unit was operated from a position too far to one side.	Try to point the remote control at the front of the unit only when the sight-line is clear, within a 7-metre distance and, if possible, facing the unit.
	The unit is not switched on.	Switch on the unit.
Humming low frequency noise is audi-ble, even as no audio source is play-ing back	See section “Net frequency noise” in the chapter “Tips”.	See section “Net frequency noise” in the chapter “Tips”.

TECHNICAL SPECIFICATIONS

Frequency response:	20 Hz - 20 kHz ±0.5 dB
Nominal Output Voltage:	2 V
Total Harmonic Distortion:	< 0.1% (1 kHz, 1 W)
Input sensitivity:	350 mV
Signal to Noise Ratio:	>95 dB
Input Impedance:	47 kΩ
AC power connection type:	230 V/50 Hz
Inputs:	6 × RCA stereo (LINE IN)
Outputs:	2 × RCA stereo (PRE OUT), 1 × RCA stereo (REC OUT)
Dimensions:	430 × 95 × 365 mm
Weight:	8 kg
Colour:	silver / black
Tubes:	4x 6N16B

GLOSSARY

Audio Sources/Source devices

These are the components of your HiFi system and all other appliances, whose sound you want to hear over the system and are thus connected to the pre-amplifier, amplifier or receiver. This includes CD players, DVD players, FM tuners, cassette players, DAT recorders, personal computers, record players, portable audio devices and many more.

Input sensitivity

Term for the smallest average (RMS) input voltage which causes the maximum output power at the maximum volume setting on the amplifier. Examples: 100mV to 500mV (Millivolts) on line level inputs, 2mV to 5mV on the phono MM input or 0.1mV to 0.5mV on the phono MC input.

dB Level

This is a way of describing any physical quantity; it is a common measurement for signal voltages and the volume. It is given in decibels (dB). Alternating signal voltages below 1V (RMS) are described as "line level" voltages, which are suitable as music

signals for amplifier inputs. Inputs on amplifiers (mostly represented by RCA sockets), which are designed for signals on the CD player, tape recorder, DVD player etc. are also referred to as "line level inputs". Those signal inputs must not be confused with inputs that accept preamplified signals.

RCA

RCA is the American name for a type of coaxial connectors and sockets, originally the abbreviation for "Radio Corporation of America", the name of a United States company. Both the plug and cable consist of a rod-shaped inner lead and a cylindrical-shaped outer lead. This enables a mono audio signal or a video signal to be transmitted. Compared to the XLR plug connector, this type of connection is also called "unbalanced signal connection".

Dynamics

The volume difference between the quietest and the loudest sounds possible in audio signals, without distortion or transition to noise.

CONSIGNES DE SECURITE

Please keep the receipt, store it together with this manual. The receipt is your proof for the beginning of the warranty period. Note the serial number in the following box, you can read it from the rear side of the device.

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