Engl E633, Operator'S Manual

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Main Supply Connector (AC Power Inlet, IEC – C14 connector)
Plug the mains cord in here.
CAUTION!
Make sure you use an intact mains line cord with a grounded plug! Before you power the amp
up, ensure the voltage value (e.g. printed on the Type Label or alongside the mains port) is the same as the
current of the local power supply or wall outlet. Please also heed the guidelines set forth in the separately
included pamphlet, Instructions for the Prevention of Fire, Electrical Shock and Injury.
Mains Fuse Box
The rear chamber contains the mains fuse and the front chamber a spare fuse.
NOTE:
Ensure replacement fuses bear identical ratings (refer to the technical data)!
CAUTION!
Always make sure replacement fuses are of the same type and have the same ratings as the
original fuse! To this end, please refer to the fuse ratings shown on the type panel.
Footswitch
Mid Boost, FX Loop, (conventional 6.3mm / ¼“ TRS). Use this jack to connect a conventional footswitch with
two switching functions, i.e. the ENGL Z4 (2 x off/on – Single Pole Single Throw or SPST for short).
Tip:
switching Mid Boost on and off.
Ring:
switching the FX Loop on and off.
Default (no footswitch connected):
Mid Boost is off, FX Loop is on.
Clean/Lead (conventional 6.3mm / ¼“ TRS). Use this jack to connect a conventional footswitch with two
switching functions, i.e. the ENGL Z4 (2 x off/on – Single Pole Single Throw or SPST for short).
Tip:
switching between the Clean and the Lead channels.
Ring:
switching Master Volume Boost on and off.
Default (no footswitch connected):
Clean channel is activated, Master Volume Boost is off.
Noise Gate Threshold Level
This control activates the onboard Noise Gate serving to suppress any excess noise generated when the
Lead Channel is active. To this end, twist the knob clockwise, near or just beyond the 9 or 10 o‘clock position.
Use this knob to set a threshold value (that is, the noise level) at which the Noise Gate activates to suppress
the signal within the 9 to 5 o‘clock range. The further you twist the knob to the right, the higher the signal
level at which the Noise Gate kicks in. If you set the knob to the 5 o‘clock position, the Noise Gate reacts
to extremely high noise levels, meaning that there‘s not much of a margin between the guitar signal and
background noise.