Acoustic Soloist
AS80R
From the Chairman
I would like to thank you personally for selecting
Marshall’s first ever venture into acoustic guitar
amplification, the Acoustic Soloist.
The Marshall reputation for producing classic tones that
have led the field in electric guitar amplification for over
three decades, has been achieved by a combination of many
factors. Most notably as a result of our constant investment
into research and development, plus our ability to listen to
musicians and produce the sounds they desire. The latest
result of our listening is the Acoustic Soloist.
Retaining all the hallmarks of unrivalled Marshall quality,
the AS80R Acoustic Soloist has been built by my dedicated
team of experts with the utmost versatility in mind.
I suggest that you read this handbook carefully in order to
fully understand the many sounds and functions contained
within your amplifier.
As is the case with all our fine products, the Acoustic
Soloist is built to withstand the test of time. When it comes
to quality and reliability Marshall is world famous for never
compromising.
The incredible sound, features and flexibility of the
Acoustic Soloist make it the combo amplifier that every
acoustic performer has been waiting for.
I’m sure you will enjoy your new Marshall amplifier
immensely and I wish you every success with it.
Sincerely,
1
ENGLISH
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.
To amplify the subtle nuances and natural
characteristics of acoustic instruments requires an
amplifier of great flexibility and superb overall
tone.
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.
Channel 1 -Microphone.
Featuring a balanced XLR connector into a
studio grade pre-amplifier with active volume and
EQ controls.
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.
Channel 2 -Magnetic Auxiliary.
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
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.
Channel 3 -Transducer.
The main Transducer channel is intended for
piezo type acoustic transducers either direct from
the instrument or from pre-amped devices.
It's highly flexible features include active
volume and EQ, two specially designed antifeedback filters and a unique ‘pick attack’ control
which accentuates the contrast between plectrum
and finger picking styles.
It also has a ‘pedal level’ effects loop suitable
for connecting floor pedals such as delays,
compressors, swell pedals etc, exclusively through
this channel.
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.
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.
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.
WARNING!
PLEASE READ THE FOLLOWING LIST CAREFULLY.
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.
G. Never use any amplifier in damp or wet conditions.
H. Please read this instruction manual carefully before switching on.
ENGLISH
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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.
Speaker complement.
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.
Front Panel
Channel 1 -Microphone.
1. XLR -Balanced input.
Input to mic, pre-amplifier.
2. Phase switch.
Reverses the phase of channel 1 only -to
prevent frequency cancellation problems when
mic’ing an instrument in conjunction with a pickup device through another channel.
3. Active Volume/ gain control.
For optimum headroom/ noise performance
controls the channel gain level.
4. 3 Band active EQ.
Provides cut and boost of + or -12 dB at
80 Hz (lo), 600 Hz (mid) and 8 KHz (hi).
5. Chorus in/ out push switch.
Selects the chorus in or out of this channel.
Channel 2 -Magnetic Auxiliary.
6. Jack input.
Jack input of approximately 10 Meg input Z.
7. Shift push switch.
Selects flat response for acoustic and tailored
response for electric guitar.
8. Active Volume/ Gain control.
Controls the channel gain level.
9. 3 Band Active EQ.
Provides cut and boost of + or - 12 dB at
80 Hz (lo), 600 Hz (mid) and 8KHz (hi).
10. Chorus in/ out push switch.
Selects the chorus in or out of this channel.
Channel 3 -Transducer.
11. Jack input.
With source select pushswitch for piezo or
pre-amped input. Piezo -10 meg input. Pre-amp 100K input.
12. Active Volume/ 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.
15. Pedal Level Effects Loop.
(Pre gain and EQ) Effects loop to match
floor pedals. 1 meg Ohm return impedance to
prevent interaction with swell pedals.
16. Fixed EQ.
Sweepable mid range circuit + or -12dB,
250Hz to 2K5Hz.
17. Low and high active E.Q.
Provides cut and boost of + or -12 dB at
80 Hz (lo) and 8 KHz (hi).
Master Section.
18. Mix control.
Controls the level of effects/ dry signal when
using external effects processors through the
effects loop.
19. Stereo Reverb.
With depth control, footswitchable with LED
status indicator.
20. Output volume.
Controls the overall output volume level.
21. Stereo Chorus.
Front panel on/ off switch for Stereo Chorus
with LED indication. Note:( this item is also
footswitchable (see item 23).
For the footswitch to function the panel
switch should be pushed to the‘in’ position.
22. Stereo Chorus.
Dual voice LFO’s with resonance, intensity
and rate controls.
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ENGLISH
5
Rear Panel
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.
ENGLISH
2
1
7 86
4 5 12 14 20191813
11
3
9 10 15
16
17 22
Volume
Microphone
Lo
-12010
-12 -12
Chorus
Chorus
-12010 -12 -12
Mid Hi Volume
Transducer
Input
Send Return
FBF1
010010 010- + 010010 010
ReverbOnChorus
On
FBF2 Attack FX Return Reverb Output
Volume
Mid Hi
-12-12 250 -12
Mid
E.Q.
Frequency HiLoPedal Loop
Shift
Phase Input source
Flat
Elec.Guitar
Positive
Negative
Piezo
Preamp
Acoustic Control
+12 2k5 +12
min
010
Intensity
Chorus
Rate Modulation
Power
Resonance
Model A1080
+12
+12 +12
+12 +12 +12
max Fast
AAAACCCCOOOOUUUUSSSSTTTTIIIICC
CC
SSSSOOOOLLLLOOOOIIIISSSSTT
TT
Volume Lo
Magnetic/Auxillary
+12
0
1
LFO1 LFO2
Slow
21
Front Panel
27
26
25
24
23
Rear Panel
MAINS INPUT
230V ~ 50 Hz
350 Watts
Where applicable, This Apparatus Must Be Earthed
WARNING! No user serviceable parts inside; refer servicing to qualified
personnel only.
WARNING! Risk of shock. Do not open
AVIS! Risque de choc. Ne pas ouvrir.
Fire & Shock Hazard: Do not expose this unit to rain or moisture.
Manufactured in Great Britain by: Marshall Amplification plc, Bletchley,
Milton Keynes.
Line Out Effects Return
Output
Phase
+ –
Left Right
Right
Left Effects send
Rev/Chorus
Footswitch
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