LR150, LR230
& LR300
Linear Response Combos
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WARNING!
Please read the following list carefully.
A. ALWAYS ensure that a good quality mains plug is fitted to your Audio State™ conforming to the latest
B.S.I. standards (UK only) lead supplied.
B. ALWAYS ensure that the plug is wired in accordance with the regulations of your country.
C. DO NOT attempt to remove the chassis. There are no user serviceable parts inside your Audio State™.
D. ALWAYS have your Audio State™ serviced or repaired by competent, qualified service technicians.
E. NEVER use your Audio State™ in damp or wet conditions.
F. DO NOT obstruct airflow around the amplifier, a clearance of 30cm is required at the top, back and sides.
G. WARNING This apparatus must be earthed.
In t ro d u c t io n
LR3 0 0
The Marshall LR300 is a com bination of a 5 channel m ono m ixer, high quality 300
Watt RMS power am p with distortion reducing lim iting circuit and a com pact high
quality loudspeaker system , intended to provide a very versatile single unit solution
to all applications where linear stage am plification is required. Let us just take a
m om ent to understand what we m ean by Linear Response. Linear response
essentially m eans getting out what we put in, only louder, without any undue
colouration, distortion, or undesired frequency changes, just as you would expect
from a good PA or HiFi system . Those qualities are desired in a guitar am p, for
instance, but NOT when you are am plifying keyboards, sound m odules, pre-recorded
m usic or vocals. The LR300 allows you to do this with ease as it is self contained in
one package, rather than carrying around (and finding stage space for) the m inim um
of three units that would m ake up a norm al PA type set up.
The LR300’s 5 channels com e equipped with a variety of input and sound form ing
options, plus the power and sonic quality to enable m any different live sound uses to
be perform ed. For instance, the LR300 can be used to m ix and am plify up to 5
keyboards, sound m odules and/or sequencers, as either a m ain system at club level
or as a m onitor system on louder concert stages. Want to use a guitar as well? No
problem ! With the inclusion of the reknowned Marshall loudspeaker em ulation
system on channel 4, not only is great clean guitar sound possible, it also allows the
use of external distortion generating effects, i.e. stom p boxes or pream ps, without the
sound being harsh and fizzy, unlike a norm al PA system or m ixer. Great for keyboard
players who double on guitar!
Besides the norm al jack line inputs on all channels, channels 1 and 2 also feature
balanced XLR inputs for low im pedance m icrophones for vocal or acoustic instrum ent
am plifying duties, plus channel 5 also has phono inputs for tape, CD, or even a
com puter sound card! Channel 1 also features a dedicated series FX loop, so that you
can add specialised FX to that channel, i.e. how about a harm onizer on your vocals?
With so m uch versatility on tap the creative horizons of the LR300 are quite
boundless. For exam ple, how about using it as a percussion m onitor - m iking and
m ixing both electronic and acoustic drum sources. Or as a “band in a box” used by
solo/duo artists (or even a full band!) for bar, lounge and cabaret functions where
space and transport is lim ited, but high quality sound is the order of the day. For the
m ore technically m inded the LR300 also features a 15” prem ium bass driver and
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2
com pression driven Constant Directivity high frequency horn with a pro grade
crossover and horn protection circuit. Each channel has 3 band EQ, gain and FX send
controls, whilst the m aster has a parallel FX loop, spring reverb and line outs to send
the m ixed signal to a larger PA system or tape recorder if required.
The LR300 features a protection device fitted to the cross over filter to protect the
horn. If pushed too hard into distortion, the horn will be autom atically de-activated.
Once the protection device has cooled down sufficiently it will re-activate the horn.
Besides the rugged side carrying handles, the LR300 has built in castor inserts to suit
the optional Marshall castors, available from your Marshall dealer.
LR2 3 0
The Marshall LR230 is a stereo 30 Watt 2x10” com bo and is ideal for hom e practice
use providing the user(s) with the opportunity to m ix up to 2 stereo sources such as
keyboards, drum m achines, tape decks, CD players and sequencers. Other features
include an internal lim iter to prevent distortion, a parallel effects loop and an in-built
spring reverb.
LR1 5 0
The Marshall LR150 however is ideal for rehearsals and gigging. This 1x15” with
piezo horn com bo provides 150 Watts of power and allows a m ix of up to 4 different
inputs. The user(s) can send the m ixed signal via the Line Out to a P.A. which is
independent of the com bo’s m aster volum e allowing the com bo to be used as an
onstage m onitor. Other features include an internal lim iter to prevent distortion, a
parallel effects loop and an in-built spring reverb.
This handbook is designed to help you get the m ost from your Marshall Linear
Response am plifier. We would suggest that you read this carefully before plugging in.
LR230
AUDIOSTATE
LR2 3 0 Fro n t P a n e l Fe a t u re s (p a g e 3 6 )
of Line Inputs are Keyboards, drum machines
and sequencers.
Ch a n n e l 1
1. Phono Input Left
4. Right J ack
This is a high impedance unbalanced input.
Typical uses of Line Inputs are drum machines,
For use with the right side of a stereo input when
used in conjunction with item 3. This is a high
C.D. players, tape deck, 4 tracks and computers.
impedance unbalanced input.
This is for connection to the left output of
external device used.
5. Volum e
Controls individual volume level for channel 1.
Overall volume will be governed by the Master
Volume control (item 20).
2. Phono Input Right
This is a high impedance unbalanced input. This
is for connection to the right output of external
device used.
6. Effect & Reverb
When using the in-built reverb on the LR230 this
control will adjust the amount of reverb on
Channel 1. When using an external effects
processor this will control the amount of effected
3. Left / Mono J ack
This is for either a mono input or the left side of a
stereo input if item 4 is used as well. This is a
high impedance unbalanced input. Typical uses
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3
signal through Channel 1, as it dictates the
amount of signal to the Effects Send (item 12).
12. Send J ack
For connection to the input of an external effects
processor (mixed to mono).
Note - this will be effected by the Effect Return
control (item 15) and the Master Reverb control
(item 16).
13. Return Left / Mono J ack
For connection to the left output of a stereo
external effects processor or from the output of a
mono effects processor.
Ch a n n e l 2
7. Mic Input XLR
14. Return Right J ack
Unbalanced low impedance for microphone
input.
For connection to the right output of a stereo
external effects processor.
8. Left / Mono J ack
15. Effect
This is for either a mono input or the left side of a
stereo input if item 9 is used as well. This is a
high impedance unbalanced input. Typical uses
of Line Inputs are Keyboards, drum machines
and sequencers.
Controls the ratio of effected to dry signal in your
overall tone. Further control is given by Effect &
Reverb controls on Channel 1 and Channel 2
(item 5 and item 10).
9. Right J ack
Re ve rb
16. Reverb
For use with the right side of a stereo input when
used in conjunction with item 8. This is a high
impedance unbalanced input.
Controls master level of internal reverb.
17. Rem ote J ack
10. Volum e
Allows you to switch internal reverb on and off
from remote footswitch (optional extra, model
no. PEDL-00020)
Controls individual volume level for channel 2.
Overall volume will be governed by the Master
Volume control (item 20).
11. Effect & Reverb
Ma s t e r
18. Low
When using the in-built reverb on the LR230 this
control will adjust the amount of reverb on
Channel 2. When using an external effects
processor this will control the amount of effected
signal through Channel 2, as it dictates the
amount of signal to the Effects Send (item 12).
Controls overall low frequencies of combo.
19. High
Controls overall high frequencies of combo.
Note - this will be effected by the Effect Return
control (item 15) and the Master Reverb control
(item 16).
20. Volum e
Controls overall volume of combo. This also
controls the level of the Line Out on the rear
panel.
Effe c t s
21. Power Switch
The LR230 features a parallel effects loop to
allow you to use external effects processors.
Switches the mains power to the combo and
indicates power status.
LR2 3 0 Re a r P a n e l Fe a t u re s (p a g e 3 6 )
1. Mains Input
Line Out
For connection to the mains. We would always
recommend that your plug is wired in accordance
with your country’s regulations.
In some instances you will want to connect the
LR230 to a P.A. system or to recording
equipment. The Line Out level on the LR230 is
controlled by the Master Volume (item 20).
2. Headphone J ack
3. Left
For headphone input when silent practice is the
call of the day.
For connecting the left hand signal to a P.A.
system or recording equipment.
Note - connecting headphones will disconnect
internal speakers.
4. Right
For connecting the right hand signal to a P.A.
system or recording equipment
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4
LR150
AUDIOSTATE
LR1 5 0 To p P a n e l Fe a t u re s (p a g e 3 8 )
Note - this will be effected by the Effect Return
control (item 19) and the Master Reverb control
(item 20).
Ch a n n e l 1 & Ch a n n e l 2
1. & 5. Low
Controls the low frequencies on Channel 1 and
Channel 2 respectively.
13. & 18. Volum e
Controls individual volume level for channel 3
and 4 respectively. Overall volume will be
governed by the Master Volume control (item
21).
2. & 6. High
Controls the high frequencies on Channel 1 and
Channel 2 respectively.
3. & 7. Effect
Ma s t e r S e c t io n
19. Effect Return
When using the in-built reverb on the LR150 this
control will adjust the amount of reverb on
Channel 1 and Channel 2 respectively. When
using an external effects processor this will
control the amount of effected signal, as it
dictates the amount of signal to the Effects Send
(item 10) on the rear panel.
This is the master Effects Return and is an effects
mix control, allowing you to decide when using
an external effects processor how much of your
overall sound will be effected. Further control is
given by the individual Effect control which
features on each channel.
Note - this will be effected by the Effect Return
control (item 19) and the Master Reverb control
(item 20).
20. Master Reverb
The LR150 comes complete with an in-built
spring reverb. The overall reverb level for the
combo is set here, with independent controls
featuring on each channel allowing you to set
independent levels for each channel.
4. & 8.Volum e
Controls individual volume level for channel 1
and 2 respectively. Overall volume will be
governed by the Master Volume control (item
21).
21. Master Volum e
The overall volume of the combo is set here. As
with effects and reverb, there is an independent
control on each channel allowing you to set
independent volume levels for each channel.
This will not however affect the level of the Line
Out Jack on the rear panel (item 12).
Ch a n n e l 3 & Ch a n n e l 4
9. & 14. Low
Controls the low frequencies on Channel 3 and
Channel 4 respectively.
10. & 15. Mid
22. LED
Controls the mid frequencies on Channel 3 and
Channel 4 respectively.
Indicates operating status of combo.
11. & 16. High
Controls the high frequencies on Channel 3 and
Channel 4 respectively.
12. & 17. Effect
When using the in-built reverb on the LR150 this
control will adjust the amount of reverb on
Channel 3 and Channel 4 respectively. When
using an external effects processor this control
will control the amount of effected signal, as it
dictates the amount of signal to the Effects Send
(item 10) on the rear panel.
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5
LR1 5 0 Re a r P a n e l Fe a t u re s (p a g e 3 8 )
N.B. Reads from right to left on panel.
1. Mains Input
7. Line Input J ack
This is a high impedance unbalanced input.
For connection to the mains. We would always
recommend that your plug is wired in accordance
with your country’s regulations
Ch a n n e l 4
8. Mic Input XLR
2. Power
This is a low impedance balanced input for use
with microphones.
Switches the mains power to the combo
9. Line Input J ack
Ch a n n e l 1
This is a high impedance unbalanced input.
3. Line Input J ack
10. Send J ack
This is a high impedance unbalanced input.
Typical uses of Line Inputs are Keyboards, drum
machines and sequencers.
For connection to the input of an external effects
processor.
11. Return J ack
For connection to the output of an external effects
processor.
Ch a n n e l 2
4. Line Phono Input
12. Line Out J ack
This is a high impedance unbalanced input.
Typical uses of Line Inputs are drum machines,
C.D. players, tape deck, 4 tracks and computers.
The Line Out jack can be used for connection to
recording equipment for direct recording or for
connection to a P.A. system. This is not effected
by the Master Volume (item 21).
5. Line Input J ack
This is a high impedance unbalanced input.
13. Rem ote J ack
Allows you to switch internal reverb on and off
from remote footswitch (optional extra, model
no. PEDL-00020).
Ch a n n e l 3
6. Mic Input XLR
This is a low impedance balanced input for use
with microphones.
LR300
AUDIOSTATE
LR3 0 0 To p P a n e l Fe a t u re s (p a g e 4 0 )
1, 6, 11, 16 & 23. High
4, 9, 14, 21 & 26. Vol
Controls the high frequencies on Channel 1, 2, 3,
4 and 5 respectively.
Controls individual volume level for Channel 1,
2, 3, 4 and 5 respectively. Overall volume will be
governed by the Master Volume (item 30).
2, 7, 12, 19, & 24. Effect
5, 10, 15, 22 & 27. Low
When using the in-built reverb on the LR300 this
control will adjust the amount of reverb on
Channel 1, 2, 3, 4 and 5 respectively. When
using an external effects processor this will
control the amount of effected signal, as it
dictates the amount of signal to the Effects Send
on the rear panel.
Controls the Low frequencies on Channel 1, 2, 3,
4 and 5 respectively.
17. Switch - Speaker Em ulator
Switches Speaker Emulator on.
The LR300 features Marshall acclaimed speaker
emulation circuitry on Channel 4. When in
operation, this will re-voice this channel to suit
guitar.
Note - this will be affected by the Effect Return
control (item 28) and the Master Reverb control
(item 29).
18. LED
3, 8, 13, 20 & 25. Mid
Indicates when Speaker Emulator is on.
Controls the middle frequencies on Channel 1, 2,
3, 4 and 5 respectively.
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6
28. Effect Return
30. Master Volum e
This is the master Effects Return and is an effects
mix control, allowing you to decide when using
an external effects processor how much of your
overall sound will be effected. Further control is
given by the individual Effect control which
features on each channel.
The overall volume of the combo is set here. As
with effects and reverb, there is an independent
control on each channel allowing you to set
independent volume levels for each channel.
This will not however affect the level of the Line
Out Phono on the rear panel (item 11).
29. Master Reverb
31. LED
The LR300 comes complete with an in-built
spring reverb. The overall reverb level for the
combo is set here, with independent controls
featuring on each channel allowing you to set
independent levels for each channel.
Indicates operating status of combo.
LR3 0 0 Re a r P a n e l Fe a t u re s (p a g e 4 0 )
1, 5, 7, 8 & 9. Line Input J ack
11. Line Out Phono
This is a high impedance unbalanced input for
channels 1, 2, 3, 4 & 5 respectively. Typical uses
of line jack type inputs are drum machines and
keyboards.
The Line Out can be used for connection to
recording equipment for direct recording or for
connection to a P.A. system. This is not affected
by the Master Volume.
2. Mic Input XLR - Channel 1
12. Send J ack
This is a low impedance balanced input for use
with microphones.
For connection to the input of an external effects
processor.
3. Effects Send J ack
13. Return J ack
For connection to the input of an external effects
processor. For use on Channel 1 only.
For connection to the output of an external effects
processor.
4. Effects Return J ack
14. Rem ote Footswitch
For connection to the output of an external effects
processor. For use on Channel 1 only.
Allows you to switch internal reverb on and off
from remote footswitch,
(optional extra, model no. PEDL-00020).
6. Mic Input XLR - Channel 2
15. Power
This is a low impedance balanced input for use
with microphones.
Switches the mains power to the combo.
10. Line Inputs Phono
16. Mains Input
These are high impedance unbalanced inputs.
Typical uses of Line, phono type inputs are drum
machines, C.D. players, tape deck, 4 tracks and
computers.
For connection to the mains. We would always
recommend that your plug is wired in accordance
with your country’s regulations.
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7
LR2 3 0 - Fro n t P a n e l
LINEAR RESPONSE AMPLIFIER
POWER
CHANNEL 1
CHANNEL 2
EFFECTS
REVERB
MASTER
RETURN LEFT/MONO
LEFT/ MONO
LEFT/ MONO
EFFECT
EFFECT
8
13
3
VOLUME
& REVERB
SEND
EFFECT
REVERB
REMOTE
VOLUME
VOLUME
& REVERB
LOW
HIGH
7
0
1
L
1
2
14
21
R
18
-10dB+10dB
5
19
-10dB+10dB
20
6
9
4
10
11
15
16
12
17
LINE INPUT
RIGHT
0
10
0
10
MIC
RIGHT
0
10
0
10
RETURN RIGHT
0
10
0
10
0
10
LR230
AUDIOSTATE
LR2 3 0 - Re a r P a n e l
WARNING!:
SHOCK HAZARD. DO NOT OPEN. TO REDUCE THE RISK OF
FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR
MOISTURE. THIS APPARATUS MUST BE EARTHED.
AVIS!:
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR. POUR EVITER LES
RISQUES D’INCENDIE ET DE DECHARGES ELECTRIQUES, N’EXPOSEZ JAMAIS CET
APPAREIL A L’HUMIDITE OU A LA PLUIE. CONNECTER CET APPAREIL A LA TERRE.
1
Manufactured in England by:
Marshall Amplification plc, Bletchley,
Milton Keynes, England.
CAUTION!:
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE
COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
HEADPHONE
LINE OUT
ATTENTION!:
POUR EVITER LES RISQUES DE DECHARGES
3
4
ELECTRIQUES, NE PAS OUVRIR LE COUVERCLE. CET APPAREIL NE COMPORTE
AUCUNE PIECE SUSCEPTIBLE D’ETRE REPAREE PAR VOS SOINS. FAITES
TOUJOURS APPEL A UN TECHNICIEN QUALIFIE POUR TOUTE REPARATION.
2
MAINS INPUT
230V ~ 50 Hz
100 Watts
OUTPUT
LEFT
RIGHT
2x30 Watts RMS into 4 Ω
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3 6
3 7
LR1 5 0 - To p P a n e l
CHANNEL 1
CHANNEL 2
CHANNEL 3
LINEAR RESPONSE AMPLIFIER
ON
CHANNEL 4
15 16
10
11
14
1
2
5
6
9
MASTER
22
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
1 9
20
21
LOW
HIGH
LOW
HIGH
LOW
MID
HIGH
LOW
MID
HIGH
0
10
0
10
0
10
17
18
3
4
7
8
12
13
EFFECT
RETURN
MASTER
REVERB
MASTER
VOLUME
0
10
0
10
0
10
0
10
0
10
0
10
0
10
0
10
EFFECT
VOLUME
EFFECT
VOLUME
EFFECT
VOLUME
EFFECT
VOLUME
LR150
AUDIOSTATE
LR1 5 0 - Re a r P a n e l
3
13
12
11
10
9
8
7
6
5
4
OUTPUT
2
1
150 Watts RMS into 8 Ω
REMOTE
LINE OUT
RETURN
LINE
MIC
LINE
MIC
LINE
LINE
SEND
LINE
CHANNEL 4
CHANNEL 3
CHANNEL 2
CHANNEL 1
POWER
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3 8
3 9
LR3 0 0 - To p P a n e l
LINEAR RESPONSE AMPLIFIER
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
SPEAKER
EMULATOR
POWER ON
MASTER
1
3
6
8
1 1
1 3
1 6
1 7
1 9
1 8 2 3
-10dB +10dB
3 1
-10dB +10dB
-10dB +10dB
-10dB +10dB
-10dB +10dB
MASTER
REVERB
HIGH
HIGH
HIGH
HIGH
HIGH
2
4
7
1 2
2 4
0
10
0
10
0
10
0
10
0
10
EFFECT
EFFECT
EFFECT
EFFECT
EFFECT
2 0
2 5
2 8
2 9
3 0
-10dB +10dB
MID
-10dB +10dB
MID
-10dB +10dB
MID
-10dB +10dB
MID
-10dB +10dB
MID
EFFECT
MASTER
RETURN
VOLUME
9
1 4
2 1
2 6
0
10
0
10
0
10
0
10
0
10
VOL
VOL
VOL
VOL
VOL
5
1 0
1 5
2 2
2 7
-10dB +10dB
LOW
-10dB +10dB
LOW
-10dB +10dB
LOW
-10dB +10dB
LOW
-10dB +10dB
LOW
LR300
AUDIOSTATE
LR3 0 0 - Re a r P a n e l
1 1
1 0
1 4
1 3
1 2
9
8
7
6
5
4
3
2
1
LINE
OUT
1P5OWER
Made in England by:
FOOTSWITCH
RETURN
SEND
LINE
LINE
LINE
LINE
MIC
LINE
RETURN
SEND
MIC
LINE
Marshall Am plification plc,
Bletchley, Milton Keynes,
England.
MASTER
CHANNEL 5
CHANNEL 4
CHANNEL 3
CHANNEL 2
CHANNEL 1
MAINS INPUT
120V ~ 60 Hz
500 Watts
OUTPUT
WARNING!:
SHOCK HAZARD. DO NOT OPEN. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. THIS APPARATUS MUST BE EARTHED.
300 Watts RMS into 4 Ω
AVIS!: RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR. POUR EVITER LES RISQUES D’INCENDIE ET DE DECHARGES
ELECTRIQUES, N’EXPOSEZ JAMAIS CET APPAREIL A L’HUMIDITE OU A LA PLUIE. CONNECTER CET APPAREIL A LA TERRE.
WARNING!:
DO NOT
CAUTION!: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
OBSTRUCT GRILLES
1 6
AVIS!:
NE PAS
OBSTRUER LES GRILLES
ATTENTION!:
POUR EVITER LES RISQUES DE DECHARGES ELECTRIQUES, NE PAS OUVRIR LE COUVERCLE.
CET APPAREIL NE COMPORTE AUCUNE PIECE SUSCEPTIBLE D’ETRE REPAREE PAR VOS SOINS. FAITES TOUJOURS APPEL
A UN TECHNICIEN QUALIFIE POUR TOUTE REPARATION.
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4 0
4 1
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