Direct from the Marshall Amplification Research & Development labs come the new AudioState, Linear Response multi-purpose professional amplifiers specially designed to handle the widest range of applications.
The term 'Linear Response' means getting out what you put in, only louder, without any undue colouration or distortion, just as you would expect from a good PA or Hi-Fi system. Hence these amps are ideal for keyboards and also for mini P.A. systems in schools and churches for speeches etc, for aerobics classes and the like, right through to a full band playing small venues. The versatility of these professional specification combo amplifiers allows them to suit not only keyboards, but just about any instrument, including; acoustic instruments such as guitars and mandolins, vocal or instrument microphones, samplers, drum machines and woodwind instruments (when fitted with the correct type of pick-up) or a combination of the above.
If you have asked the question "Where can I find an amp that the whole band can plug into, portable enough to fit on the back seat of the car and simple enough to be ready for use in an instant", the answer is right here in the LR230, LR150 or LR300.
Audiostate- the simple sonic answer to a complex sound problem!
 
 
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This 1x15" with piezo horn combo gives you the choice of a mix of up to 4 different inputs and provides 150 Watts (RMS) of clean Marshall power. The LR150 features an internal limiter to prevent distortion; a parallel effects loop for any external effects processor and an in-built spring reverb to add ambience to your sound. Channels 1 and 2 each have 2 band EQ whilst Channels 3 and 4 have 3 band EQ, also a combination of input types allows the connection of keyboards, instruments, microphones, or CD players and other audio equipment.
However, that's not all. Also provided is a Line Out facility which isn't affected by the LR150's Master Volume level. This allows you to connect your LR150 to the house PA system in any venue that has this facility. Your LR150 will then act as an onstage monitor and your mixed signal will be sent to the P.A. The Line Out can also be used to record the mixed signal directly onto recording equipment.
If you want a multi-purpose combo that is versatile and powerful enough for both rehearsal and full blown live performance, the LR150 is the one for you.
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Ideal for home practice, for use in the classroom or any other small venue, this 2x30 Watt (RMS) 2x10" combo allows you to mix up to 2 stereo or 4 mono sources, such as microphone, keyboards, drum machines, tape decks, CD players, sequencers, acoustic guitars etc.
The LR230's in-built limiter prevents distortion and ensures a clear sound at all times, a parallel effects loop handles any external effects processor and a built-in spring reverb gives size and spread to your sound. Also included are a Stereo Headphone Jack and Line Out.
The LR230 equips you with all you need for high quality sound reproduction and allows you to be heard.
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The LR300's 5 channels come equipped with a variety of input and sound forming options, including 3 band EQ, Gain and Effects Send controls, plus the power (300 Watts RMS) and sonic quality to enable many different live sound uses. The LR300 can be used to mix and amplify whatever is put into it as a main system at club level or as a monitor system on louder concert stages. The inclusion of the renowned Marshall Speaker Emulation system on channel 4 provides not only superb clean guitar response, but also the ability to connect distortion generating effects pedals or pre-amps.
In addition to the normal jack inputs on all channels, Channels 1 and 2 also feature balanced XLR inputs for low impedance microphones for vocal or acoustic instrument amplifying duties, plus channel 5 has phono inputs for tape, CD or even a computer sound card. The LR300 has a built in premium quality 15''speaker and a high frequency horn with a pro grade crossover and horn protection circuit. Spring reverb and Line Out complete the feature line up of this impressive high powered multi-purpose combo.
With so much versatility on tap, the creative horizons of the LR300 are almost boundless.
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LR Series Handbook