Marschall JCM900 4100 Mode D'emploi page 6

REAR PANEL FUNCTIONS
Marshall Amplification plc,
Bletchley, Milton Keynes, England.
WARNING: DO NOT OBSTRUCT VENTILATION GRILLES
ATTENTION:
NE PAS OBSTRUER LES GRILLES DE VENTILA
1. LOOP LEVEL
Adjusts the level of the FX Loop from
-10dBV to +4dBu. Higher settings
match modern FX processors and
lower settings match floor FX pedals.
NOTE: Some FX such as Distortion
and Compressor are best suited to
connection via the front panel INPUT
jack socket.
2. SEND
Connect to the input of an external FX.
3. RETURN
Connect to the output of an external FX.
4. RECORDING COMPENSATED LINE OUTPUT
Use this jack socket for direct
connection to recording equipment or
PA system. The signal is specially filtered
for optimum recording performance.
5. DIRECT LINE OUTPUT
Unfiltered preamp signal for connection
to an external power amplifier. NOTE:
Using the DIRECT LINE OUTPUT does
not omit the need for a speaker load
to be connected to the 4100 output
All manuals and user guides at all-guides.com
Made in England by
HIGH
LOOP
LEVEL
1.
stage. See item #1 in Important Setup
Information in this manual.
6. IMPEDANCE SELECTOR
Two-way switch for matching amplifier
and speaker impedance.
7. LOUDSPEAKERS
Parallel wired jack sockets for
connecting speaker cabinet(s). Ensure
that the speaker cabinet(s) is easily
capable of handling the full amplifier
power and that the impedance is
correctly selected (item #6). If in any
doubt, consult your Marshall dealer for
advice.
8. MODE
Switches the amplifier from HIGH to
LOW power output. The LOW setting
configures the output stage to 'triode'
operation which halves the rated output.
The HIGH power position configures the
amplifier to 'pentode' operation for full
100 Watt rated power output. NOTE:
Switching to lower power will not half
the volume of the amplifier. The purpose
of this feature is to alter the amplifier's
EFFECTS LINE OUTPUT
LOW
SEND RETURN RECORDING
COMPENSATED
2. 3 4.
POWER LEVEL OUTPUT
LOUDSPEAKERS
100W R.M.S.
IMPEDANCE
SELECT
(4)16 8
DIRECT
DO NOT USE WITHOUT CONNECTING SPEAKER
SEE MANUAL FOR CORRECT OPERATION AND RA
5. 6.
TION
7.