AMT SS-20 Manual

AMT Ikke kategoriseret SS-20

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1 1
Safety precautions
CAUTION! Risk of electric shock! Danger! Even after disconnection from
mains the internal circuits can be up to 500 Volts live.
In order to avoid electric shock you must not remove
the cover the rear panel of the device. There are no
user serviceable parts inside. Repair of the device can
be carried out only by qualified experts. If the device is not used it must be
disconnected from mains.
WARNING! In order to avoid fire or electric shock the device must not be exposed to
rain or moisture. Do not let water or other liquid get inside the device. Do not place
vessels such as vases filled with liquid on top of the device.
This symbol indicates the presence of non-insulated
dangerous voltage inside the device and the danger of
electric shock.
This symbol indicates important information related to the
device maintenance and servicing contained in the
accompanying documentation.
Please read the instruction manual very carefully.
1. Keep the user's guide at hand.
2. Pay attention to warnings.
3. Follow all instructions related to device operation.
4. To clean the device, use only a dry cloth having disconnected
the device from mains prior to that.
5. You must not block or cover vent slots. When installing the
device, follow the instructions provided by the manufacturer.
6. Do not place the device near heat sources, keep it from direct
sunlight.
7. Lay the mains cable so that it is not stepped on and avoid its
contact with sharp corners, etc. If you use the plug or outlet for
switching the device off they should be easily accessible.
8. Use only additional devices and accessories recommended
by the manufacturer. Disconnect the device from mains in
case of thunder-storm or when the device is not in use for
prolonged time.
9. All works related to the device repair must be done only by
qualified service personnel.
10. WARNING! All service instructions are intended only for
qualified personnel in order to avoid electric shock; do not
carry out any repair works which are not described in the
instruction manual. Repair works must be carried out only
by qualified experts.
Contents
Important instructions 1
Complete set 1
Introduction 2
Before you start 2
Specifications 2
Power adapter low-voltage contacts arrangement 2
Controls 3
Front panel 3
Rear panel 3
Only for qualified service personnel 3
Tube replacement 3
Connections and switching 3
Block diagram 4
References 4
IMPORTANT INSTRUCTIONS!
NON-OBSERVANCE OF THE FOLLOWING INSTRUCTIONS CAN CAUSE
DAMAGE OF THE DEVICE. THE DAMAGES RESULTED BY NON-
OBSERVANCE OF THESE INSTRUCTIONS MAKE THE WARRANTY VOID.
¾ After transportation or storage of the product under
negative temperatures, before switching the device on it is
necessary to leave the device under room temperature in
its original package for AT LEAST 2 hours!
¾ To connect the guitar preamp to other devices use only the
cables intended for such connections.
¾ You must not use other cables types such as speaker, etc.
SWITCHING ON the guitar preamp:
¾ Switch the device on ONLY AFTER YOU HAVE DONE all
audio connections!
¾ Before connecting the preamp to mains make sure that the
case, the connecting cable and the of the power adapter
have no damages such as cuts, cracks, dents, etc. and are
operational.
¾ To switch the preamp on first insert the low-voltage
connector of the power adapter into corresponding jack on
the rear panel of the guitar preamp and only then plug the
adapter into the mains outlet.
SWITCHING OFF the guitar preamp:
¾ To switch the preamp off first disconnect the power
adapter from mains and then disconnect its low-voltage
connector from the jack on the rear panel of the guitar
preamp.
COMPLETE SET
The complete set includes:
1. The guitar preamp 1
2. Power adapter 1
3. Instruction manual 1
4. Packaging 1
5. Warranty card 1
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2 2
INTRODUCTION
The SS-20 guitar preamp is intended for use in studio and live performances. The
principle and the motto of this device: it is the TUBE that sounds in
SS-20, but the transistors do their best to make it sound in all its
beauty and originality not by limiting but helping the TUBE! In order to
make tube drivers fully open under the "hottest" conditions they need huge
amplitude - a hundred and more volts. The dynamic behavior characteristic to
authentic tube preamps have been realized in SS-20 due to the omission of op amp
which normally limits the signal in the preliminary amplification sector to 20 – 250 V,
and application of special drivers capable of up to 250V amplitude and possessing
the nonlinearity similar to 12АХ7 triode. In this way we have managed to realize the
complete delivery of guitar signal avoiding usual hybrid "stiffness" as well as to give
SS-20 its peculiar characteristic sound.
The special attention was given to the clean channel - there we also tried to provide
the maximum guitar signal dynamics simultaneously forming soft "nonlinearity"
inherent in vacuum triodes drivers. It also allowed us to avoid both "stiffness" and
"refinement" which are often found in hybrid devices having CLEAN-channel.
When building the internal preamp structure we were guided by the principle of
maximum use of amplification and nonlinear transformation of the tube sector of the
device. Thus, the semi-conductor part of a hybrid practically does not participate in
limitation process (except for preamp use in LEAD mode with Gain LEAD level of
over 7) and the entire spectrum is formed by the tube part of the preamp.
Architecture and features of SS-20 guitar pedal:
9 Unique hybrid circuitry.
9 Two full-potential channels: CLEAN and DRIVE with the possibility of DRIVE
channel operating in two basic modes: the mode of moderate sensitivity
(CRUNCH), the mode of high sensitivity (LEAD).
9 CLEAN channel has a separate tone-volume controls unit and adjustments of
sensitivity and output level.
9 DRIVE channel has separate tone-volume controls and adjustments of
sensitivity and output level.
9 Sequential break (LOOP).
9 Possibility of operation with specialized guitar amplifiers (OUTPUT) and mixers
or linear power amplifiers (OUTCAB.EMUL.).
LEAD channel is designed for modern, extremely aggressive sounds for players
who use both standard and lowered tuning. Carefully calculated spectral and tone
balances of the channel are good for modern “punch” and bright flageolets and
extreme readability fast licks. Thus, the channel can be used both for aggressive
rhythm parts and for brightly outlined solos.
CRUNCH channel is distinguished by lesser overall sensitivity but possesses high
universality. The user can choose using PRE-EQ switch for one of the three variants
of preliminary signal correction having different tone balance between the lowest and
highest frequencies which allows to use the channel both for "rhythm" and "solo".
The wide adjustment range of sensitivity in combination with expanded possibilities
of target tone adjustments results in the sound starting from light airy crunch to
dense and bright Lead channel-like heavy sounding.
CLEAN channel is designed for classical clean sound with graceful light limitation in
the mode of the maximum sensitivity and crystal cleanliness and brightness within
the zone of moderate sensitivity value. It has separate controls of sensitivity and
output level.
Before you start
For the purpose of transportation the device was carefully packed by the
manufacturer. However, if cardboard packaging is damaged, it is necessary to check
the device for the presence of external damages.
¾ In case of damages do not send the device to us, but inform the
seller and transport agency since otherwise you lose the right
to damage compensation.
¾ In order to avoid damages during storage and transportation
always use original packaging.
¾ Do not allow children to play with the device and packaging
materials.
¾ Please recycle all packaging materials in the way harmless to
environment.
¾ In order to avoid the device overheating provide sufficient air
flow, do not cover and do not place it near other heat-
generating devices.
¾ Operating the device next to powerful radio transmitters and
sources of high-frequency signals can lead to significant sound
distortion. In this case increase the distance between the
device and the transmitter and use the screened cables for all
interconnections.
WARNING!
Please be aware that high sound volume can harm your hearing
and / or to damage the speakers of your PA system. Before
switching the device on turn the controls "VOLUME" into
extreme left position (counter-clockwise). Always try to adhere
to moderate level of volume.
Specifications
Use only auxiliary devices and accessories
recommended by the manufacturer.
Tubes
12AX7 (ECC-83) 1
INPUT
Impedance 1,0 M Ohm
Sensitivity -10dB
RETURN
Impedance 1,0 M Ohm
Sensitivity -10dB
OUTPUT
Output impedance 10k Ohm
Output signal level +10dB
OUT CAB.EMUL.
Output impedance 10k Ohm
Output signal level -10dB
SEND
Output impedance 10k Ohm
Output signal level -10dB
Power supply
Voltage DC 12V
Current 0,5A
Power adapter
Voltage DC 12V
Current 1,25A
Dimensions / Weight
NET dimensions (WxHxD). (Without
power adapter) 119x57x103 mm
NET weight (without power adapter) 0,52 kg
GROSS dimensions (WxHxD). About 206x83x140mm.
GROSS weight About 0,78 kg

Produkt Specifikationer

Mærke: AMT
Kategori: Ikke kategoriseret
Model: SS-20

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