MARSHALL AVT275X
Owner's Manual

The first 10 programs offered are all Reverbs. Reverberation effects recreate the natural echo reflections found in physical environments such as halls and rooms or, in the case of plate reverbs, a mechanically vibrating metal plate. These echoes are extremely complex in nature and are, therefore, notoriously difficult to recreate. In developing these 10 programs we've gone to great lengths to ensure that none of the harsh digital �graininess� normally associated with some digital reverbs is present. ENGLISH Below is a brief description of each of the 16 DFX programs available: 1 2 3 4 5 6 7 8 9 10 11 Hall A: this is a large, bright sounding, concert hall. �Wembley Arena, are you ready to rock!?� Hall B: warmer sounding than Hall A, this program is perfect for adding depth and character to clean and acoustic tones. Hall C: a medium sized hall with 12ms of delay before the reverb starts. Room 1: a hardwood studio with lots of early reflections. Perfect for acoustic type sounds. Room 2: perfect for adding some subtle ambience. Room 3: warmer sounding than Room 1, perfect for clean or acoustic work. Plate 1: a bright, transparent plate sound ideal for lead work. Plate 2: warmer sounding than Plate 1, this program is great for adding sustain, especially on clean and acoustic tunes. Plate 3: an accurate emulation of a vintage tube plate reverb. As this program has very little low end it is great for adding �cut�. Gated Reverb: by �chopping-off� the end of the reverb�s decay �tail� via a Noise Gate, this program is great for spicing-up chord stabs without cluttering up your sound. Chorus: splitting the signal and then mixing the dry signal with a detuned version creates this popular effect. To add to the subtle �widening� this creates, the detuned signal is modulated by an LFO (Low Frequency Oscillator) which causes the detuning to vary. The result is a subtle, lush sound that is equally effective on both clean and dirty tones. Flange: similar to chorus but much more �jet� like in nature. Delay: this creates an echo repeat of the original signal. The delay time is adjustable in 10 millisecond (ms) increments and can be set to be as long as 1270ms which is well over 1 second. Chorus/Room: as the name suggests, this combines Chorus and a large room Reverb. Chorus/Delay/Room: if program 14 isn't dramatic enough for you then this is definitely the one for you, as it adds Delay to the Chorus & Reverb mix! Modulation: this effect is similar to the chorus effect but is less subtle and can be used to create rotary speaker-like effects.

23. DFX Mix Controls (Clean FX & Overdrive FX)
These determine the level of the internal effects selected by the pair of Program controls (25). The top DFX Mix control works on the two OD channels while the bottom one works on the Acoustic Simulator and Clean channels. In general you will find that the modulation effects (e.g. Chorus, Flange) require more level than the reverbs and delays. As always, let your ears decide what is right!

26. Digital FX Program/Adjust Table
This lists the 16 programs selectable via the Program control (25) and also indicates which parameter the Adjust control (24) modifies for each one. For added convenience, this table is shown below. ENGLISH

24. Adjust Controls (Clean FX & Overdrive FX)
For each of the 16 selectable DFX a particular parameter is adjustable. For example, when a Reverb is chosen, the decay (how long the reverb will be heard before it fades away) is adjustable via this control. The �Program/Adjust� table (26) on the front panel of your amp lists what the Adjust control does for each of the 16 programs. As was the case with the DFX Mix controls, the top Adjust control works for the two OD channels and the bottom one for the Clean & Acoustic Simulator channels.

25. Program (Clean FX & Overdrive FX)
These select each one of the 16 on board digital effects - the top Program control works on the two OD channels and the bottom control works for the Clean and Acoustic Simulator Channels. The DFX available include single effects such as Reverb (9 types), Delay or Chorus and also multi-FX such as Chorus/Delay/Room. To add further to the flexibility of these two DFX sections, they can be switched on and off via the sturdy, LED foot-controller which comes supplied with each amp.

27. Power Switch
Wait for it...yes, this switches the amp on and off! When the amp is on the power switch is illuminated and vice-versa. Advanced power amplifier muting circuitry provides anti-thump protection on power up and down. Important Note: As is the case with an all-valve amplifier, there will be no signal heard until the amp's ECC83 preamp valve warms-up and starts to pass signal. This can take up to 15 seconds so don't panic!

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