www.amtelectronics.com www.amtelectronics.com
3
CONTROLS.
1.
Signal correction switch for
CLEAN
channel.
2.
CLEAN
channel indicator.
3.
CRUNCH
channel indicator.
4.
CRUNCH PRE-EQ
switch. The position of the switch determines the
degree of signal preliminary equalization (processing) in CRUNCH
channel.
5.
LEAD
channel indicator.
6.
CRUNCH/ LEAD channels indicator.
7.
TREBLE SHIFT
switch of CRUNCH channel.
8.
TREBLE SHIFT
switch of LEAD channel.
9.
CRUNCH
channel indicator.
10.
LEAD
channel indicator.
11.
POWER ON
indicator (lit when preamp is on).
12.
POWER
switch for turning the preamp on and off.
13.
MASTER
determines the general output signal volume.
14.
LEVEL LEAD
for LEAD channel volume control.
15.
PRESENCE LEAD
determines the PRESENCE correction level of
LEAD channel.
16.
CRUNCH/LEAD
for switching between CRUNCH/LEAD channels.
17.
LEVEL CRUNCH
determines signal level of CRUNCH channel.
18.
PRESENCE CRUNCH
determines PRESENCE correction level of
CRUNCH channel.
19.
HIGH
for
CRUNCH/LEAD
channel sets the high frequency range for
CRUNCH/LEAD channels.
20.
MID
for
CRUNCH/LEAD
sets the mid-frequency range of
CRUNCH/LEAD channels.
21.
LOW
for
CRUNCH/LEAD
sets low-frequency range of CRUNCH/LEAD
channels.
22.
GAIN LEAD
for
CRUNCH/LEAD
sets the gain level to the input signal
of LEAD channel.
23.
GAIN CRUNCH
for
CRUNCH/LEAD
sets the gain level to the input
signal of CRUNCH channel.
24.
CHANNEL
switches between CLEAN/(CRUNCH/LEAD) channels.
25.
LEVEL CLEAN
sets the signal level of CLEAN channel.
26.
HIGH
for
CLEAN
sets the high-frequency range of CLEAN channel.
27.
MID
for
CLEAN
sets the mid-frequency range of CLEAN channel.
28.
LOW
for
CLEAN
sets low-frequency range of CLEAN channel.
29.
GAIN CLEAN
sets the gain level to the input signal of CLEAN channel.
30.
INPUT
is intended for connecting your guitar o the preamp.
31.
IN DC ADAPTER
for connection of the power unit.
32.
F.SWITCH
for connection of external CLEAN/
(CRUNCH/LEAD) switch.
33.
PHONE
for headset connection.
34.
OUT CAB.S.
for connecting to Line input of a mixer.
35.
OUTPUT
the preamp output (0 dB).
36.
RETURN
for connecting to the external effects unit’s output (-10 dB).
37.
FX LOOP
for controlling Return input signal.
38.
SEND
for sending signal to the external effects unit (-10 dB).
39.
INPUT
for connection of your electric guitar to the preamp.
INPUTs priority.
INPUT
located on the front panel has the priority in relation to
INPUT
,
located on the rear panel of the preamp. I.e. in case of simultaneous
connection to the inputs located on the front panel and the rear panel the
preamp will operate with the signal coming to the front panel input. When
you disconnect the cable jack from the front panel
INPUT
the preamp will
start operate using the signal coming to the
INPUT
located on the rear
panel of the device.
CAUTION!
All connections are to be carried out only when the power of
the preamp has been SWITCHED OFF!
For qualified personnel only.
DANGER! High voltage!
Even after disconnection from mains the internal
circuitry can be up to 500 V DC live. In order to avoid
electric shock you MUST NOT disassemble the device. There
are no user-serviceable components inside the device. The
device repair must be done only by qualified specialists.
If the device has not been used, it is necessary to disconnect
it from mains.
WARNING! High voltage inside the preamp. To avoid
possible malfunctions the device must not be exposed to
rain or moisture. Prevent water or other liquids from
getting inside the device
Tubes replacement.
To replace the tubes:
1.
Unscrew 7(seven) nuts of the jacks located on the rear panel ( 32-36,
38,39);
2.
Remove
FX LOOP
knob (
п
37);
3.
Unscrew the nut of
FX LOOP
resister ( 37, under the knob);
4.
Remove the rear panel of the device by unscrewing 12 (twelve)
screws: 7 on the top part and 5 on the rear;
5.
Carefully remove the old tubes;
6.
Put the new tubes instead of the old ones;
7.
Fix the rear panel of the guitar preamp in place by means of 12
(twelve) screws: 7 on the top part and 5 on the rear;
8.
Screw on the nut of
FX LOOP
resistor (37);
9.
Put
FX LOOP
knob in place (37);
10.
Screw on 7 (seven) nuts of the jacks located on the rear panel (32-36,
38,39);
For replacement use only the tubes recommended by the
manufacturer.
AUDIO CONNECTIONS AND WITCHING.
CAUTION! All connections are to be carried out only
when the power of the guitar preamp has been
SWITCHED OFF!
Possible audio connections of the preamp with external devices:
AMT Electronics reserves the right to change the internal and external design of the device
which won’t decrease its consumer properties without preliminary notification. In this
connection the specifications and appearance of the device might differ from the ones
shown in this document.
