MARSHALL AS100D
Owner's Manual

ENGLISH

ENGLISH

AS100D Front Panel Features Channel 2 - Acoustic Instrument and Microphone
9. Instrument Input
Mono jack input. Plug the lead from your guitar in here to connect to channel 2 only.

AS100D Front Panel Features Channel 1 and Channel 2 mix Anti Feedback Section.
18. �On� Switch
Activates the Anti Feedback filters (items 21 & 22) for both acoustic instrument channels.

27. Volume Control
Adjusts the volume level of channel 3.

Channel 4 - Auxiliary
32. Phono Inputs
Left and right phono sockets for connection to CD/MD/Tape player, Drum Machine or other backing equipment. This channel works in stereo.

28. Bass Control

10. Microphone Input
XLR type socket to connect a microphone to channel 2.

19. Depth Switch
Increases the depth for both notch filter controls 20 & 21.

Adjusts the amount of bottom end or bass in your sound. Too much bass can cause unwanted feed back, therefore care should be taken when setting this control. The best position to start is 12 o�clock, then adjust from there as desired.

33. Volume Control
Controls the volume level of the auxiliary channel.

29. Treble Control
Adjusts the high end or treble frequencies in your tone. Again, care should be taken when setting this control as too much treble will cause high pitched feedback. The starting point of the 12 o�clock position is best, then adjust from there to suit your own preference.

Stereo Digital Effects
34. Program Select Control
Rotary control to select one of the 16 digital effects programs.

11. Link Channel 1 Switch
Switch to link channel 2 (when an instrument with a single stereo jack is connected) to the stereo Input of channel 1 (see item 1). Channel 2 level and EQ settings will affect the signal connected to the ring of the stereo input jack. (item 1). Refer to block diagram.

20. Rotary Feedback Filter (Sweep 1)
Sweeps the band of frequencies most likely to cause body resonance (the main offending feedback frequencies) from 50Hz - 250Hz and reduce it when selected.

35. Parameter Adjust Control
Adjusts the main parameter of the effect selected by Program Select Control (item 34). The main parameter is decay time for all Reverb and Delay programs. For Chorus, Flange and Modulation programs, it is the Speed.

21. Rotary Feedback Filter (Sweep 2)

12. Contour Switch

Changes the contour of the channel EQ by cutting the Mid by a predetermined amount. If you require Phantom power for your condenser microphone, pressing this switch provides +15V.

Provides a second sweep of a broader band of frequencies (60Hz - 650Hz) to help remove the second offending frequency.

30. Internal Effects Mix Control
Selects the amount of effect from the built in digital effects for channel 3 only.

13. Phantom Switch

TIP: In order to select and eliminate the offending frequencies, select the point where the feedback just appears and move the frequency control until it disappears. Next, increase the gain level until the feedback reappears and adjust the frequency again, then back off the level slightly.

31. External Effects Mix Control
Selects the amount of effect on channel 3 from any external effects processor connected through the FX Loop.

36. Effects Level Control
Controls the amount of the digital effects signal in the mix.

14. Phase Switch
Reverses the phase of the signal to cut out unwanted resonances caused by the instrument and speakers being in phase. This can considerably reduce the amount of low frequency acoustic feedback. Ensure that you test this in the position where you will actually perform.

Master Volume
37. Master Volume Control
Controls the overall volume level of the AS100D.

Channel 1 and Channel 2 mix Effects Switches
22. Internal Effects Switch
Activates the internal stereo digital effects section for the acoustic instrument channels.

AS100D Rear Panel Features
1. Mains Input
Plug the mains power cord provided in here

15. Volume Control
Adjusts the volume level of channel 2.

23. External Effects Switch

Activates the external effects loop for the acoustic instrument channels.

5. Stereo Effects Return
Left (mono) and Right returns to accept the output from an external effects processor. If the processor is mono (such as a floor pedal), connect to the left (mono) return jack.

16. Bass Control

Adjusts the amount of bottom end or bass in your sound. Too much bass can cause unwanted feed back, therefore care should be taken when setting this control. The best position to start is 12 o�clock, then adjust from there as desired. Adjusts the high end or treble frequencies in your tone. Again, care should be taken when setting this control as too much treble will cause high pitched feedback. The starting point of the 12 o�clock position is best.then adjust from there to suit your own preference.

Channel 3 - Microphone
24. Microphone Input
XLR type socket to take the input from an external microphone for either vocal or instrument reproduction.

2. Footswitch Jack Socket
For connection to the supplied remote footswitch which provides switching of both internal and external effects.

6. D.I. Outputs
Left and right direct outputs, fully balanced for connection to external PA mixing desk.

3. Effects Send
Sends the signal from the AS100D to the input of an external effects processor.

17.Treble Control

25. Phase Switch
Reverses the phase of the signal to cut out unwanted resonances caused by the instrument and speakers being in phase.

7. Line Out
Unbalanced Left and right direct outputs for connection to recording or other outboard equipment.

4. Effects Level Control
Rotary control to adjust the external effects return level.

26. Phantom Switch
If you require Phantom power for your condenser microphone, pressing this switch provides +15V.

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