English
From the Chairman
I would like to thank you personally for selecting the AS50R, Acoustic Soloist combo.
The Marshall name has been associated with many fine products over the years and our commitment to quality remains as constant today as it did right back at the birth of Marshall Amplification back in 1962.
In the case of the Acoustic Soloist, much time and research has gone into making the sound as natural as possible. As all of my designers are also guitarists, they fully understand the needs of the player and bring their expertise to bear on all our products. You can also rest assured that every Marshall amplifier has been designed and engineered to the highest possible standards, so as a result will stand the test of time and constant use.
I strongly suggest that you read this handbook carefully before using your AS50R and then keep it on hand for future reference.
I am certain that you will get great enjoyment from your Marshall Acoustic Soloist combo and wish you every success with it.
Yours Sincerely,
Introduction
The AS50R is a compact and portable 50 Watt combo amplifier specially designed for use with acoustic instruments. Between its two channels, this combo has the flexibility to handle instruments with transducers, such as piezo or magnetic pick-ups (channel 1), or microphone for either vocal or instrument reproduction (channel 2).
The built-in Chorus effect is assignable to either or both channels and the Reverb can be controlled and balanced between the channels to create just the right ambience. If you want to add further effects, then there is an on-board parallel effects loop which can be balanced between the channels in the same way as the Reverb.
One of the most difficult aspects of amplifying some acoustic instruments is feedback. To help you eliminate this, the AS50R features several ‘anti-feedback’ controls, including a Phase switch and a frequency controllable Notch Filter. The combination of these two elements will give you precise control of the frequencies where feedback is likely to occur and help you to eliminate them.
For clear and detailed performance, the AS50R is loaded with two 8" speakers and a high efficiency piezo tweeter. There is also an internal limiter which allows you to push the maximum level from the 50 Watt output, whilst remaining distortion free.
Neat and compact, flexible and portable, the AS50R is the ideal amplifier for the acoustic player who wants a system as suitable for small gigs as it is at home.
Front Panel Features
Channel 1 - Acoustic Instrument Channel
1. Input Jack
Plug the lead from your guitar in here. The high impedance of this input will help you to get the best from the passive or active piezo or magnetic pick-ups.
2. Volume Control
Controls the volume level of the Acoustic Channel 1. A good place to start with this control is the half way, or 12 o’clock position, then adjust according to the sensitivity of your pick-up.
3. Bass Control
Adjusts the amount of bass, or bottom end of the instrument’s tone. Care should be taken when setting this control as adding excessive bass can cause unnatural howling. Again, the half way position is the best place to start.
4. Treble Control
Adjusts the treble, or top end of your sound. Careful adjustment will make your high notes lively but not too harsh. It is worth noting that set in higher positions, this control will induce a certain amount of noise.
Channel 2 - Microphone / Aux Channel
5. Phono Inputs
Inputs to take connection from a tape or CD player.
6. Microphone Input
Balanced XLR type input for connection of a microphone and suitable for vocal or instrument applications.
7. Jack Input
Input to take any source, such as a drum machine, keyboard, etc.
8. Volume Control
Controls the volume level of the Microphone / Aux Channel 2. A good place to start with this control is the half way, or 12 o’clock position, then adjust according to the sensitivity of your pick-up
9. Bass Control
Adjusts the amount of bass, or bottom end of your sound. Care should be taken when setting this control as adding excessive bass can cause unnatural howling. Again, the half way position is probably the best place to start.
10. Treble Control
Adjusts the treble, or top end of your sound. Careful adjustment will make your high notes lively but not too harsh. It is worth noting that set in higher positions, this control will induce a certain amount of noise.
Master Section
11. Chorus Assign Switches
Allows the built in Chorus effect to be selected on either channel individually, or both channels together.
12. Chorus Speed Control
Controls the speed of change of frequency for the built-in Chorus effect.
13. Chorus Depth Control
Controls the amount of change of the frequency shift for the built-in Chorus effect.
English
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