AS80R
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WARNING!
PLEASE READ THE FOLLOWING LIST CAREFULLY.
E
A. The Plug attatched to the mains lead provided is wired in accordance with the
following colour code. Blue -neutral. Green/Yellow -Earth. Brown -Live (UK only).
B. Always ensure that the value of the fuse corresponds to the rating marked on the plug.
C. Never under any circumstances, operate the amplifier without an earth.
D. Always have this equipment serviced or repaired by competent, qualified personnel.
E. Do not attempt to remove the amplifier chassis, there are no user serviceable parts
inside.
L
N
G. Never use any amplifier in damp or wet conditions.
H. Please read this instruction manual carefully before switching on.
country style playing. This makes the Acoustic
Soloist the ideal amp for singers who also need to
play acoustic and electric rhythm guitar for their
backing.
Acoustic Soloist -AS80R.
Due to the increased popularity of acoustic
and electro/ acoustic instruments, a dedicated
amplification system that can accurately
reproduce the pureness of an acoustic’s unplugged
sound is a must for many performers.
Channel 3 -Transducer.
The main Transducer channel is intended for
piezo type acoustic transducers either direct from
the instrument or from pre-amped devices.
To amplify the subtle nuances and natural
characteristics of acoustic instruments requires an
amplifier of great flexibility and superb overall
tone.
It's highly flexible features include active
volume and EQ, two specially designed anti-
feedback filters and a unique ‘pick attack’ control
which accentuates the contrast between plectrum
and finger picking styles.
The unique design and high versatility of the
Acoustic Soloist offers all this within its three
independent channels, each designed for a specific
purpose but with the flexibility to provide much
more -plus the ability for each channel to be used
simultaneously.
It also has a ‘pedal level’ effects loop suitable
for connecting floor pedals such as delays,
compressors, swell pedals etc, exclusively through
this channel.
Channel 1 -Microphone.
Featuring a balanced XLR connector into a
studio grade pre-amplifier with active volume and
EQ controls.
The Master Section.
The Acoustic Soloist boasts an 80 watt stereo
(40 watts per side) power amplifier specifically
designed for wide frequency response and low
distortion. Semi ‘soft knee’ limiting is included so
maximum headroom can be achieved cleanly
without any undue harshness.
A phase switch is provided to prevent
problems when linking an instrument in
conjunction with a pick-up device through another
channel.
The flexibility of this channel enables the use
of a microphone for either instrument or vocal
reproduction, making the Acoustic Soloist ideal
for the ‘solo’ performer playing small gigs, where
space is at a premium.
The built in stereo reverb creates warm,
natural depth while Marshall’s renowned
analogue chorus provides a stereo spread that adds
incredible width to the sound.
The Rear Panel.
Channel 2 -Magnetic Auxiliary.
The Acoustic Soloist features a ‘Phase
Reversal’ switch on the rear panel that will help to
eliminate one of the most common problems
associated with amplified acoustic instruments -
unwanted feedback and overtones. Furthermore, it
does so without compromising the tone in the
slightest.
As well as being perfect for magnetic or piezo
type acoustic pick-ups, this multi purpose channel
is also ideal for inputing a backing tape or drum
machine.
A shift switch re-voices the channel to suit
clean, electric guitar and is excellent for jazz or
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Also included are stereo line-outs, for direct
linking to larger sound re-inforcement systems,
an effects loop with mono send and stereo return
jacks and Reverb/ Chorus footswitch jack.
Channel 3 -Transducer.
11. J ack input.
With source select pushswitch for piezo or
pre-amped input. Piezo -10 meg input. Pre-amp -
100K input.
Speaker com plem ent.
To help ensure that the Acoustic Soloist’s
sound remains warm and natural, we’ve used two
specially voiced Celestion 10" speakers that have
extended low and high frequency response with a
flat mid-range. This means that the sound always
has superb clarity and dynamic response even at
high volume levels. Also a piezo type dome
tweeter provides all the high-end crispness you
could ever need.
12. Active Volum e/ Gain control.
Controls the channel gain level.
13. FB1 & FB2 Anti-Feedback filters.
Very narrow notch filters centered on the two
frequency bands normally problematic with
acoustic guitars.
14. Pick Attack control.
Centre off control to add or subtract the
higher harmonics of the signal to either remove
pick noise or accentuate these frequencies when
utililising finger style playing.
Fro n t P a n e l
Channel 1 -Microphone.
15. Pedal Level Effects Loop.
1. XLR -Balanced input.
(Pre gain and EQ) Effects loop to match
floor pedals. 1 meg Ohm return impedance to
prevent interaction with swell pedals.
Input to mic, pre-amplifier.
2. Phase switch.
16. Fixed EQ.
Reverses the phase of channel 1 only -to
prevent frequency cancellation problems when
mic’ing an instrument in conjunction with a pick-
up device through another channel.
Sweepable mid range circuit + or -12dB,
250Hz to 2K5Hz.
17. Low and high active E.Q.
3. Active Volum e/ gain control.
Provides cut and boost of + or -12 dB at
80 Hz (lo) and 8 KHz (hi).
For optimum headroom/ noise performance
controls the channel gain level.
Master Section.
4. 3 Band active EQ.
Provides cut and boost of + or -12 dB at
80 Hz (lo), 600 Hz (mid) and 8 KHz (hi).
18. Mix control.
Controls the level of effects/ dry signal when
using external effects processors through the
effects loop.
5. Chorus in/ out push switch.
Selects the chorus in or out of this channel.
19. Stereo Reverb.
Channel 2 -Magnetic Auxiliary.
With depth control, footswitchable with LED
status indicator.
6. J ack input.
20. Output volum e.
Jack input of approximately 10 Meg input Z.
Controls the overall output volume level.
7. Shift push switch.
21. Stereo Chorus.
Selects flat response for acoustic and tailored
response for electric guitar.
Front panel on/ off switch for Stereo Chorus
with LED indication. Note:( this item is also
footswitchable (see item 23).
8. Active Volum e/ Gain control.
Controls the channel gain level.
For the footswitch to function the panel
switch should be pushed to the‘in’position.
9. 3 Band Active EQ.
Provides cut and boost of + or - 12 dB at
22. Stereo Chorus.
80 Hz (lo), 600 Hz (mid) and 8KHz (hi).
Dual voice LFO’s with resonance, intensity
and rate controls.
10. Chorus in/ out push switch.
Selects the chorus in or out of this channel.
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Re a r P a n e l
23. Footswitch jack.
Twin footswitch for chorus and reverb
switching functions.
24. Effects Send jack.
Jack socket to feed the input of an external
effects processor.
25. Effects Return jacks.
Sockets to accept the left and right outputs
from an external effects processor.
26. Phase Reversal switch.
Reverses the system phase to enhance
acoustic control (feedback and overtone
elimination) when using the amplifier in a
confined space with the guitar.
27. Line Out jacks.
Left and right line out jacks suitable for
direct connection to PA or recording mixers.
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Front Panel
11
1
2
3
4
5
12
13
14
18
19
20
21
Microphone
Transducer
Acoustic Control
FBF2
Volume
Lo
Mid
Hi
Volume
FBF1
Attack
FX Return
Reverb
Output
Volume
ACOUSTIC
Input
SOLOIST
Chorus
Chorus
0
10 -12
+12 -12
+12 -12
+12
+12
0
10
0
10
0
10
-
+
0
10
0
10
0
10
0
0
Phase
Input source
Return
Reverb
On
Chorus
On
E.Q.
Chorus
Send
1
Power
Model A1080
10
Volume
-12
+12 -12
+12 -12
-12
+12 -12
+12 250
2k5 -12
+12
0
10
min
max Slow
Fast LFO1
LFO2
Shift
Lo
Mid
Hi
Pedal Loop
Lo
Mid
Frequency
Hi
Resonance
Intensity
Rate
Modulation
Magnetic/Auxillary
16
17
6
7
8
9
10
15
22
Rear Panel
Where applicable, This Apparatus Must Be Earthed
Line Out
Effects Return
WARNING! No user serviceable parts inside; refer servicing to qualified
Rev/Chorus
personnel only.
Left
Right
Left
Right
Effects send
Footswitch
WARNING! Risk of shock. Do not open
Output
Phase
MAIN S IN PUT
AVIS! Risque de choc. Ne pas ouvrir.
2 3 0 V
~
5 0 Hz
Fire & Shock Hazard: Do not expose this unit to rain or moisture.
3 5 0 W a tts
+
–
Manufactured in Great Britain by: Marshall Amplification plc, Bletchley,
Milton Keynes.
23
24
27
26
25
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