Vincent DAC-7 D/A-Converter with tube output stage Instructions

Vincent DAC-7 D/A-Converter with tube output stage

SAFETY GUIDELINES

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:

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 5 cm 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, lintfree 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 2012/19/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 is a product of Sintron Distribution 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
Distribution GmbH, 76473 Iffezheim.
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 HiFidevices. 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.
| his 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 cable for the POWER CONTROL
• 1 stereo set of RCA
• 1 USB-Cable
• 1 remote control VDA-8
• 1 Button cell CR2032
• this manual

DESCRIPTION OF THE APPLIANCE

FRONT VIEW

1. POWER
   This is the main power switch for turning on and off the device.

2. SR: sensor diode for the remote control

3. Select
   Button for selecting one of the six Inputs (AES/EBU, Digital IN, Coaxial IN, USB) for playback.

4. Display window for the tube

5. INPUT: Input Selector
   This dial allows you to choose one of the six inputs.
   The LED that is actually lit shows you what input channel has been selected. Additionally these LEDs show that the appliance is switched on.

6. TUBE/FET: amplification mode switch
   Toggle between tube amplification and transistor amplification.

7. PHONES
   If desired, you can connect a set of headphones with an impedance between 32Ω and 600Ω to this stereo jack.

REAR VIEW

8. ANALOG OUTPUT:
   analogue audio signal outputs
   Either the RCA connector pair or the XLR socketss (“BALANCED”) must be connected to the corresponding input of the amplifier, preamplifier etc.

9. LAMP: Dimmer for the tube illumination
   The setting of this switch affects the brightness of the illumination of the tube display window (5).

10. POWER CONTROL (12V)
    These jack connectors (3.5 mm) send the signals for the standby control (12V Trigger).

11. DIGITAL IN:
    USB: input connector
    Here you can connect a PC, laptop etc. by a USB B/A cable.

12. DIGITAL IN:
    AES/EBU + Coaxial 1 & Coaxial 2
    Connections for audio signals of source devices with digital sound such as, for example,
    DVD players. “Coaxial” for connection via coaxial cable and “AES/EBU” via symmetrical XLR cable.

13. DIGITAL IN:
    Optical 1 / Optical 2
    Connections for audio signals of source devices with digital sound via optical fibre connection.

14. Voltage Selector:
    The voltage selector behind the pane allows switching the voltage from 230 V to 110 V.
    Refer to safety instructions for further information (p. 32, “Switching the Voltage”)

15. AC 220-240V: 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 7 m, 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 coin cell CR2032

The remote control for this item utilizes Lithium button cells. In case of old appliance disposal put out this battery and dispose seperately!

Change/inserting the batteries:

1. Open the battery compartmentof the remote control by pushingout the clip and pulling out the battery compartment.

2. Remove the optionally used battery and correctly insert the new button cell, as schematically shown in the battery compartment.

3. Close the battery compartment of the remote control.

BUTTONS OF THE REMOTE CONTROL

16. MUTE
Pressing this button once mutes analoge output (8).
Pressing it again returns to the original volume.
17. Input selector buttons
Select the input source you want to listen to with these buttons

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.

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.

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.

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!

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

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.

SWITCHING THE VOLTAGE

This device is equipped with a switch (14) that can be used to change the country-specific voltage from 230 V to 110 V.

Please never actuate the switch during operation! The voltage must only be switched by a technician, since the device fuse must also be replaced after actuation of the switch! Information about the device fuse can be found on the back of the device.
Unauthorised actuation of the switch will void any warranty claim!

CONNECTION OF THE SOURCE EQUIPMENT

Connection of a USB-source device
The integrated D/A converter makes it possible to transfer digital music signals directly from the computer through the amplifier similar to the boxes. For this, the USB jack serves as input

CONNECTION OF SOURCE DEVICES OVER OPTICAL IN AND COAXIAL IN

The integrated D/A converter makes it possible to receive also digital audio signals via an optical and/or coaxial cable and to transmit them analogously to the amplifier. Here, the “Optical IN” (13) and “Coaxial IN” (12) connections serve as input.

Digital audio source with optical signal connection

Digital audio source with coaxial signal connection

CONNECTION OF SOURCE DEVICES OVER AES/EBU

The input “AES/EBU” (12) can only be connected with audio devices that own a balanced input connector, too. Leave the inputs free if none of your audio sources uses this kind of connectors. Sometimes audio source devices have the option of using either of these connection standards.

CONNECTION TO AMPLIFIER, RECEIVER OR PREAMPLIFIER

The DAC-7 has two analogue signal outputs on the back of the device. The signal from the integrated D/A converter can be input to a traditional analogue audio component (amplifier) via the analogue outputs (8).

Use of one of the analogue outputs with RCA connectors
This is where the stereo audio signal converted to analogue by the high quality integrated D/A converter and amplified by the Hybrid stage is output. One of the two outputs and an RCA cable is required for connection to an amplifier. Connect one pair of RCA connectors (“L” and “R”) in the field “ANALOG OUTPUTS” (8) with the left and right audio connectors of the amplifier input (standard line level input) which is usually labelled “CD,” “LINE IN” or “FRONT R/L”. If you want, you can use both outputs at the same time.

Use of the analogue output with XLR connectors
This is where the stereo audio signal converted to analogue by the high quality integrated D/A converter and amplified by the hybrid stage is output symmetrically. Two XLR cables are required for connection to an amplifier. Connect the XLR connectors “L” and “R” in the field “ANALOG OUTPUTS” (8) with the left and right connectors of the XLR amplifier input which is usually labelled “CD,” “XLR IN,” “BALANCED IN” or “FRONT R/L”.

CONNECTIONS FOR THE STANDBY CONTROL (POWER CONTROL)

Many AV-Systems consist of a multitude of individual components. To avoid the necessity of switching them on and off before and after every use, many manufacturers have equipped their devices with what is known as “POWER CONTROL” circuit or “TRIGGER”. This kind of remote-controlled standby circuit is used primarily for preamplifier and power amplifiers. Particularly for preamplifiers and main amplifiers this kind of remote standby control is utilized, as power amplifiers are often placed far from other devices near the speakers. To employ these functions, direct or indirect cable connections must be made between the preamplifier (or integrated amplifier) and all the devices which support this function. The “POWER CONTROL” function operates in such a way that each switching on or off of one device in the system (usually the preamplifier) automatically brings about the switching on or off of all the connected devices which support this function. Please keep in mind that all devices which respond to the power control are not disconnected from the mains network when switched off. They are set to a standby state instead. For connecting cables, two-core cables with 3.5 mm jack plugs (mono) are used. For each connection between two devices one of those cables is needed.

If you don’t wish to use this function or if the other components do not support it, all you have to do is leave out these cable connections.

The DAC-7 is equipped with two output connectors for the power control. Here, the switching signal generated by the DAC-7 is available for other components of the system. Two HiFi components that are able to react to the power control signal can be connected directly to the amplifier’s power control outputs. If more than two devices, which can be controlled, are to be connected, then it is necessary to make the power control connection between the amplifier and these further devices through the outputs of the two devices which are connected directly. For that reason, every HiFi component that accepts power control signals is also equipped with a power control output. Thus, in theory it is possible to provide an infinite number of HiFi components with the power control signal. This approach, to loop a signal through a chain of components, is commonly referred to as “daisy chaining”.

CONNECTIONS FOR THE STANDBY CONTROL (POWER CONTROL)

Caution:
Many devices which can be controlled by a switching signal (not preamplifiers or integrated amplifiers), have two terminals which do not differentiate between input and output. In this case either of the two can be selected.
“POWER CONTROL” sockets of preamplifiers or integrated amplifiers must not be interconnected! All receiving devices must not be connected to more than one preamplifier or integrated amplifier (directly or indirectly)!

CONNECTION OF THE POWER CABLE

Check that the electricity supply to your home is appropriate to the device. The required voltage and frequency can be read on the back of the device beside the socket for the mains. If the electricity supply is appropriate, push the inlet connector of the supplied mains cable firmly into socket for the mains on the back of the device. Connect the other end of the mains cable to a mains socket.

using this button at the front panel. It has no standby option. When switched off the device is internally sepa- rated from the AC power. As a precaution, after switching on, the volume setting of the preamplifier should be reduced. After switching on, the devi- ce needs up to 30 seconds before it is ready to operate. During power-on mode, one of the LED for the input selection will be lighted.
Select input source| (3) SELECT| With this button, you can select between four input sources (AES/EBU, USB, Coaxial IN and Optical IN). By pressing this button, the player changes to the playback of the device connected thereto.
Switch between tube amplification and transistor amplification| TUBE/FET (5)| This switch allows you to choose if the converted music signal that is read from the CD is amplified to the output level using the internal TUBE amplifier or the internal FET transistor amplifier. This selection can only be made on the front panel.
Volume of the connected headphones (7)| LEVEL (7)| This function can only be operated on the front of the device. Turn the dial “LEVEL” clockwise to increase the volume in the headphones and anticlockwi- se to reduce the volume. This volume control has no effect on the output level of the analogue “ANALOG OUTPUTS” (8) on the back of the device.

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, subwoofers, 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-upsystems 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

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 suit- able 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 is lit).| The currently selected audio source (3)(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.
The amplifier is muted (MUTE function).
Main amplifier(s) has/have not been connec- ted correctly to the preamplifier, is/are swit- ched off or is/are faulty.
The speaker cables are not properly connec- ted to the main amplifier’s terminals or are defective.
The used data format can not be played or is damaged.| 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 (3)(17).
Deactivate mute function (“MUTE” button (16)).
Check the connection and ready status of the main amplifier(s) and whether it is/they are working
Check and tighten the speaker cables at the main amplifier and the speakers.
Please check the data you want to play if it is compatible with the device.
No audio playback on one channel| The source equipment is giving signal on only one channel.
One of the signal cables between audio sour- ce 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.
Poor sound quality| The cable connections are not tight, the con- nectors are dirty or a cable is defective.
A record player has been connected to a line level input without using a phono preamplifier.| Check the cables and cable connections.
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.
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.
The unit is not switched on.| Check and replace the batteries if necessary.

Try to point the remote control at the front of the unit only when the sight- line is clear, wit-   hin a 7-metre distance and, if  possible,  facing the unit.

Switch on the unit.

Humming low fre- quency 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

1x AES/EBU (24 Bit / 192 kHz),
2x Coaxial (24 Bit / 192 kHz),
2x Optical (24 Bit / 192 kHz)
Outputs:| 1 x Stereo RCA, 1 x Stereo XLR
Headphones (3,5 mm jack)
Formats:| MP3, WMA, AAC, AAC+, ALAC, FLAC
APE, WAV, DSD64, DSD 2
Colour:| black/silver
Weight:| 6,5 kg
Dimensions (WxHxD):| 430 x 95 x 360 mm

**FURTHER INFORMATION AS DEFINDE BY THE ECODESIGN REGULATION**

Time without input signal until auto-standby: 15 min. (autostandby can be switched off).

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 preamplifier, amplifier or receiver. This includes CD players, DVD players, FM tuners, cassette players, DAT recorders, personal computers, re cord 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: 100 mV to 500 mV (Millivolts) on line level inputs, 2 mV to 5 mV on the phono MM input or 0.1 mV to 0.5 mV 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.

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© Dezember 2021
International Distributor: Sintron Distribution GmbH · Südring 14 · D-76473 Iffezheim

Documents / Resources

| Vincent DAC-7 D/A-Converter with tube output stage [pdf] Instructions
DAC-7, D-Converter, A-Converter with tube output, tube output stage, Converter with tube output
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