Operator`s manual

16 FX LOOP I/II
17 Noise Gate
This button switches to and fro between and . The red LED above
the button lights up to indicate is on. You can also select loops via MIDI
program change or the ENGL Custom Z-9 Footswitch.
Both effect loops can be configured in series (that is, 100% processed signal when
is set to ) or in parallel (1% to 99% mix of preamp and effect signal when
is set somewhere between and ), or be bypassed altogether (0 % wet
balance when is set to ). You can connect an effect device to each of the
effect loops and switch from one effect device to the other using the FX Loop I/II
function, or employ just one of the two effect loops (for example, FX II Loop) and use
to activate the effect. In the latter case, serves as a bypass (set
its knob to the position). Note that in the signal path, and
controls are post and pre the power amp.
Press this button to activate an onboard and suppress excess noise in
channel 2, 3 or 4. Control the using the Level Threshold (48) knob on the
back of the amp. The LED above the button lights up to indicate the is
activated. This feature can also be switched via MIDI program change or the ENGL
Custom Z-9 Footswitch.
: The may open up inadvertently
when the is activated, a high-gain channel is selected, and the volume
exceeds the Threshold knob setting. At very high volume and gain settings, this may
generate instant feedback, particularly if your guitar is facing the speakers. Rather
than musical and controlled, this is the shrill, unpleasant and potentially harmful
variety of feedback squealing that sends your audience and fellow musicians packing.
Though the amp is not more susceptible to feedback when the is activated,
the fact that it suppresses extraneous noise means you can't hear those telltale signs
that feedback is swelling and consequently can't take measures to suppress it. For this
reason, make an extra effort to be careful when the is activated: Before
you approach the amp and speaker cabinet with your guitar in hand, turn the guitar's
volume knob to the far left position (to 0 so that no signal is audible) to prevent the
pickups and speakers from interacting!
Noise is a definite no-no in many situations. For example, studio etiquette demands
that you keep a lid on extraneous noise during short breaks. It's in the nature of high-
gain rigs to generate undesirable peripheral noise in overdriven channels. This is
attributable to the physical properties of an amp's constituent components, in
particular its active components. That's right; those cherished tubes are the culprits.
The Noise Gate is a tool that lets you silence this noise during breaks by way of signal
mute circuit. Note that electric guitars pick up interference signals, and these are
amplified tremendously at high gain levels in Hi Gain mode. The most common source
of noise is 50 or 60 hertz mains hum, particularly when the guitar is positioned near
transformers and power units. Because in worst-case scenarios this humming can
attain extremely high levels, the Noise Gate can hardly distinguish between the
musical signal and noise. This makes it hard to find the right Threshold setting. It is
FX Loop I FX Loop II
FX Loop II
Balance wet
Balance dry wet
Balance dry
FX Loop I/II FX Loop I
Balance dry Master A
Master B FX Loop Return
Noise Gate
Noise Gate
Noise Gate
Noise Gate
Noise Gate
Noise Gate
Noise Gate
A tip from the designer:
IMPORTANT note; please read and heed
A tip from the designer:
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