dynavox VT-80MK Compact Stereo Amplifier Instructions
- June 5, 2024
- dynavox
Table of Contents
dynavox VT-80MK Compact Stereo Amplifier
DEAR CUSTOMER
We thank you,
for the trust you place in us by choosing this audio product. This device
complies with all defined international safety standards. Nevertheless, the
safety instructions should be observed in order to avoid a hazard. To ensure
proper commissioning, please read this manual completely before setting up and
connecting the unit. We assume no liability for damage to property or personal
injury caused by improper handling or non-observance of the safety
instructions. In such cases, any guarantee claim will be void. We strongly
recommend that you keep the original packaging for future transport.
About Dynavox VT-80MK
The VT-80MK is a HiFi compact amplifier for two analog stereo input sources,
as well as digital input possibilities (SD, USB, BT and Tuner). The music can
optionally be playback via one and / or the second pair of loudspeakers or a
headphone. Further equipment features are sound control (bass / treble). The
signal from the currently selected source can be passed on to a further power
amplifier or active subwoofer at the regulated and pre-amplified signal output
(PRE-OUT). Thanks to its signal output on up to 4 loudspeakers, the VT-80MK is
ideally suited for sounding a second room, a terrace, etc. The signal inputs
for SD (cards), USB (sticks) and a BT data transmission also allow the
playback of digital media. The small device dimensions make the VT-80MK to a
space-saving amplifier for a small- up to a medium-sized stereo system.
SECURITY PRECAUTIONS
All equipment that is connected to the domestic mains voltage can be dangerous to the user if not handled properly.
WARNING Any use, other than described above, will damage this product, as well as risks, such as short circuit, fire, electric shock, etc. The entire product must not be altered or modified and the housing must not be opened!
Damage caused by not observing these operating instructions will void the
guarantee claim! We do not accept liability for consequential damages! Check
regularly the technical safety of the device. If the power cable or the
housing is damaged, the device has been stored for an extended period of time
under unfavorable conditions, the device has been subjected to severe stress
during transport or if there is no functions, safe operation is no longer
possible. The device must then be put out of operation and secured against
unintentional reconnection (pull the mains plug out of the socket!).
Leave the service to qualified personnel. If an error occurs, the device fuse
have to get replaced by a specialist to one of the same type. The product is
only approved for connection to 230 V / 50 Hz AC, isolated ground receptacle
and indoor use. Changes to the device or the serial number will invalidate the
guarantee claim. Always unplug the power cord at it’s plug and never unplug
the power cord at it’s cord, when disconnecting from the power supply. Ensure
that the power cord is not squeezed, extremely bent, or damaged by sharp
edges.
Do not touch the power cord with wet or damp hands. Always turn off the unit before connecting or disconnecting cables, if you don‘t use it for an extended period of time, or clean its surface. Ensure that a distance of 5 cm is left around the unit and ambient air can circulate. Ventilation openings must not be obscured. Ensure that the unit is not exposed to liquids, moisture, rain or water vapor. No objects may enter into the device (ventilation slots, etc.). -> It must be immediately disconnected from the power supply and inspected by a specialist if this has happened. Never suspend the unit to high temperatures (sun-light) or strong vibrations. Before cleaning the outer surfaces of the product, unplug the power cord. Do not use abrasives, solvents, thinners, flammable chemicals, polishes and other cleaning products that leave traces. Use a lint-free cloth for cleaning. For reasons of safety and authorization (CE) the unauthorized conversion and / or modification of the device is not permitted. We assume no liability for damage to property or personal injury caused by improper handling or non-observance of the safety instructions. In such cases, any guarantee claim will be voided!
USER INFORMATION
Electronic waste
This device is subject to the provisions of the EU Directive 2002/96 / EC, the
legal implementation of which is regulated in Germany by the Electrical and
Electronic Equipment Act (ElektroG). This is indicated by the symbol of a
dashed waste bin on the device. All items which are WEEE marked in this way,
which are no longer used, has to be disposed of separately from the household
waste at state-approved locations. For further information on the disposal of
the old appliance, please contact the city administration, the disposal office
or the store where You purchased the product.
CE mark This device complies with the valid EU directives for obtaining the CE mark and thus complies with the requirements for electrical and electronic devices (EMC directives, safety guidelines and the guidelines for low-voltage devices). Dynavox is constantly working on improving and developing its products. Therefore, changes to the design and technical design of the device are reserved, as long as they serve the purpose of progress. The content of this manual is for informational purposes only. It is subject to change without notice and does not constitute an obligation on the part of the trademark owner. The latter assumes no responsibility or liability for errors or inaccuracies, which may be contained in this manual. Dynavox is a registered trademark of Sintron Distribution GmbH, 76473 Iffezheim, Germany. This document is a product of Sintron Distribution GmbH, 76473 Iffezheim and may not be copied or distributed in whole or in part without explicit and written permission.
Automatic shutdown in the sense of the Ecodesign Regulation
This device switches itself off automatically after approx. 15 minutes without
an input signal or at volume 0 and then consumes less than 0.4 watts. To
switch the device on again, the on / off switch (1) must be pressed twice.
This device does not have a standby or standby state. To deactivate the
automatic switch-off, set the corresponding switch on the back(26) of the
device to the “Autostandy OFF” position. If the device is not used for a long
time, it is generally recommended to disconnect the device from the mains.
Minimum quality:
highly sensitive audio amplifiers are apt to generate demodulation products
in the vicinity of rf sources.
FRONT VIEW
-
POWER
Switches on and off the amplifier. Reduce volume before switching on! -
Headphone jack plug
This 3,5mm jack plug allows the use of a headphone with a impedance of 32 – 600 Ohm. -
SD
Jack for SD memory. -
USB
Jack for USB memory. -
TREBLE
Regulates the high tone content of the output signal. -
BASS
Regulates the low tone content of the output signal. -
SPEAKER (A, B, A/B)
Regulates the signal output of the speaker connections. With the switching positions A and B you’re able to turn on and off the outputs „SPEAKER A“ and „SPEAKER B“. With the switching position A/B, under usage of suitable speakers (8 – 16 Ohm), you’re able to use both outputs „SPEAKER A“ and „SPEAKER B“ at once. -
Input Selector (AUX IN)
Input selector for signal entrances AUX1 (18), AUX2 (19) and AUX3 (SD (3) / USB (4) / BT / FM-Tuner. -
Display and Mediaplayer
see page 32. -
IR-Receiver
IR-Receiver for remote control. -
VOLUME
Regulates the volume of the outputs „SPEAKER A + B“ (21), „PRE-OUT“ (20) and „ “ (2).
-
MODE
Switches between the digital playback possibilities SD, USB, BT and FM-Tuner. -
START/PAUSE
Starts the playback of incoming digital music signals (USB/SD/BT) or interrupts them and starts the FM auto scan. -
Move Back
Moves back one track during the song playback of digital music signals (USB/SD/BT) or moves back one channel in tuner mode. -
Move Forward
Moves forward on track during the song playback of digital music siganls (USB/SD/BT) or moves forward one chanel in tuner mode. -
Repeat (RPT)
ONE (repeats the current song), FOLD (repeats the whole folder), ALL (repeats all files on the memory storage), RAN (playback in random mode). -
Equalizer (EQ)
Switches between preseted sounds: Normal, Pop, Live, Rock, Jazz und Hall .
-
Signal Input (AUX1)
Stereo RCA socket for external analog sources. -
Signal Input (AUX2)
Stereo RCA socket for external analog sources. -
Signal Output (PRE-OUT)
Regulated and amplified signal output, to transfer to additional power amplifiers or active subwoofers. -
Speaker Connection (SPEAKER A und B) Speaker connectors with screw connection or with 4 mm banana plugs, for up to 4 speakers.
(Under usage of suitable speakers (8 – 16 Ohm), it is possible to run two speaker pairs at once.) -
Power Socket (AC 230V/50Hz)
Socket to plug the power cord in scope of delivery. -
FM Antenna (FM ANT.)
Connection socket for FM Tuner antenna. -
BT Antenna (BT ANT.)
Connection socket for BT antenna. -
Fuse Holder (FUSE)
Device fuse. (follow the safety instructions!). -
Auto-Standby (A-S ON/OFF)
The auto standby function can be switched off here. If this switch is set to “I” (On), the VT-80MK switches off automatically after approx. 15 minutes without an input signal or at volume 0. To switch off this function, set the switch to the “0” position (off).
REMOTE CONTROL
This remote control is used to operate the digital module (USB/SD/BT/FM- Tuner und AUX3).
-
MODE
Switches between the digital playback possibilities USB, SD, BT and FM-Tuner. -
MUTE
Mutes all signal outputs. -
Equalizer (EQ)
Switches between preseted sounds: Normal, Pop, Live, Rock, Jazz und Hall. -
Increase The Volume (VOL+)
Rises the volume of digital signal inputs. -
(U/SD)
Switches between SD and USB. -
PLAY/PAUSE
Starts the playback of incoming digital music signals (USB/SD/BT) or interrupt them or starts the FM autoscan. -
Move Back
Moves back one track during the song playback of digital music signals (USB/SD/BT) or moves back one chanel in tuner mode. -
Move Forward
Moves forward one track during the song playback of digital music siganls (USB/SD/BT) or moves forward one chanel in tuner mode. -
Numeric Buttons (0 – 9)
To input the desired track directly or choose channel in Tuner mode. -
Decrease The Volume (VOL-)
Lowers the volume of digital signal inputs. -
Repeat (RPT)
ONE (repeats the current song), FOLD (repeats the whole folder), ALL (repeats all files on the memory storage), RAN (playback in random mode).
TYPICAL SETUP
When connecting 4 loudspeakers, please note that these must have an impedance between 8 and 16 Ohm! Using lower impedances will damage the amplifier!
CONNECTION AND COMMISSIONING
Establish the cable connection in the following sequence. Never change any cable connections while the unit is switched on! As connectors for inputs and outputs, there are mechanically identical RCA jacks, be careful not to mix up these connecti-ons during installation! Also make sure not to mix up inputs on the right and left. The RCA connectors are often marked as follows: red for the right chan-nel, black or white for the left channel. Make sure that all plug connections are in secure tightness. Inadequate connections can cause noise, failures, and malfunctions.
Connection of source devices
You can connect up to two stereo sources with RCA high-level output to the
stereo RCA inputs “INPUT” (18/19). Use commercially available RCA cables.
Often the output connectors of the source devices are labeled “LINE OUT”. All
two input connectors of this amplifier (AUX1, AUX2) are equivalent high-level
inputs with RCA jacks. For SD/USB/BT/Tuner set the input selector to AUX3, you
can insert and play digital storage media to the “SD” (3) and “USB” (4),
inputs provided for this purpose. Never pull the storage media during
operation! This may result the loss of data. To use the BT function or Tuner,
use the button “MODE” to switch to the responding menu (If you have inserted
memory storages at inputs 3 and 4, you may have to switch to the BT channel or
Tuner by pressing the “MODE” button (12) first). Now locate the amplifier in
the list for available devices with your BT-compatible source device. You can
find more information in the operating instruction of your source device. The
VT-80MK will appear in the list under the name “VT-80MK”. After you have
selected it, the connection will get confirmed acoustically. From now on, all
audio signals are transmitted to the Dynavox VT-80MK. The wireless cross-link
port (BT) can be deactivated (switched off) with the input selector (AUX IN).
USB/SD
The songs are played in the same sequence in which they were saved on the
memory card USB/SD, no matter if they were saved in different folders.
Choosing a special folder is not possible. The name of the actuallly played
music title is shown in the display. In Mode RPT (Folder) you can repeat the
folder content in which the actual played song is located.
Tuner
The Dynavox VT-80MK has got a simple integrated FM Tuner. Just like the
digital inputs it can be selected with the mode button with the input selector
switch in position AUX3. With shortly pressing the play/pause button in tuner
mode the autoscan of the channels starts. All found channels are saved and get
a sequential channel number. This channel number can be selected with the
number buttons on the remote control or by pressing the fast for-ward/backward
buttons to reach the previous or next channel. Sorting or deleting of the
channels is not possible.
Connecting an additional power amplifier or active subwoofer
The RCA jacks “PRE-OUT” (20), on the back of the unit, can be used to add
another output stage (eg for sounding a further room) or an active subwoofer
to the volume controled Stereo output (line level), of the currently selected
source. The output level of the pre-amplified output “PRE-OUT” (20) depends on
the volume setting, the sound control (BASS, TREBLE) and the insertion of a
headphone. Connect this signal output to the signal input (“LINE IN” / “INPUT”
etc.) of the power amplifier / active sub-woofer using commercially available
RCA cables.
Connecting a headphone
A headphone equipped with a 3.5 mm jack plug can be plugged into the headphone
socket ” ” (9) on the front of the unit. All headphones with an impedance
between 32 and 600 Ohm can be used. Unsuitable headphones with another
impedance may damage the unit or produce an unexpectedly high volume that can
damage your hearing. As long as a headphone is plugged in, the speakers are
switched off. Before plugging in, be careful to reduce the volume of the
“VOLUME” knob (11) (this knob is also used to adjust the volume of the
headphone).
Connecting the speakers
Use cables with sufficient cable cross-section to connect your speakers to the
VT-80MK. Ensure that bare loudspeaker wires can never touch each other or the
back of the housing! No active speakers may be connected! Use only speakers
with a nominal impedance of 4 – 8 Ohm. In addition, you have the possibility
to operate the amplifier with 4 loudspeakers. For this, only use speakers with
a nominal impedance of 8 – 16 Ohm. Using speakers with a different nominal
impedance will damage the amplifier. For each loudspeaker (R: right or L:
left), you will find on the back oft he unit two loudspeaker terminals (21)
(positive+ and negative -), which are connected to one side of a loudspeaker
cable. There are similar connections on the loudspeaker, as is the polarity.
The other end of the speaker cable assigned to the loudspeaker is connected
here. The loudspeaker cable must be connected to the same terminals: the “+”
marked terminal on the amplifier must lead to the “+” marked connection of the
loudspeaker. The loudspeaker cables are fitted without connectors. Remove an
approximately 1 cm long piece of insulation from each end of the double cable.
Twist the bare strand to avoid mutual shorts. Rotate the screw of the loud-
speaker clamp counterclockwise to open the clamp contacts and insert the bare
wire end into the clamp hole. Now turn the screw connection of the loud-
speaker clamp clockwise again in order to tighten the wire in the loudspeaker
clamp. You can check that the cable is correctly seated by pulling it lightly.
In case you use pre-assembled speaker cables with 4 mm banana plugs, simply
plug them into the banana holder of the loudspeaker clamp. Make sure that the
polarity is correct.
Volume control
Ther volume setting with the remote control is only for input channel AUX3
(USB/SD/BT/Tuner). The volume can be set in steps of 0-30 and is an additional
volume control to the master volume knob on the front of the device. This
means the max. volume of 30 is always limitted by the master volume. If the
volume is set to 30, it still can be increased (decreased) with the master
volume knob, if this one is not yet set to max. volume (min. volume). Apart
from that the volume can be changed by BT sources (e.g. smartphone or tablet)
in BT mode. The volume of the analog inputs AUX1 and AUX2 can only be set by
the master volume knob.
Connection of the mains cable
Lastly, connect the double-groove plug of the power cable to the double-groove
power supply socket (22) of the amplifier. Plug the power cord into an
electrical outlet that is supplied with a suitable voltage (230 V / 50 Hz).
Make sure that the plug in the item, as well as in the electrical outlet are
secure. Do not turn the unit on until the volume control (11) has been
adjusted to the minimum volume.
TECHNICAL SPECIFICATIONS
- Frequency Response: 20 Hz – 20 kHz (+/-3 dB)
- Output power (Music / 4 Ohm): 160 W
- Impedance: 4 – 8 Ohm
- Input sensitivity: 220 mV (1 kHz, THD 1%)
- Distortion: 0.3 % (1 kHz, 1 W)
- S/N ratio: 83 dB
- Power consumption: in OFF-mode <0,4 in auto standby mode <0,4 W
- No networked standby
- Inputs: 2 x Stereo RCA jack, SD, USB, BT, FM Tuner
- Outputs: PRE-OUT (Stereo RCA), Bananaconnection toup to 4 speaker boxes,
- Mains supply: 230 V / AC, 50Hz
- Dimensions (L x W x D): 250 x 180 x 95 mm
- Weight: 2,9 kg
- Colour: black / silver
References
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