Engl E633, Operator'S Manual

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Please contact us via e-mail: service@engl-amps.com before shipping a product to us.
The more precise the error description is, the better our service team can help you. It is best to send us
a photo of the control settings and a video recording. A detailed description of the error also helps us to
isolate and locate the problem faster.
• Which channels are affected?
• Which functions are activated?
• In which knob positions does the problem occur?
• Are you using effects devices before the input or in the FX-Loop?
• Does the problem occur in standby mode (noise issues)?
• What equipment is used in detail?
Packaging
Please make sure to use suitable packaging to ensure undamaged transport (use original PKG). To unfold
the full protective function of the packaging, the outer packaging, the device and the inner packaging must
form a single unit. This is the only way to ensure that the device survives the transport route undamaged.
Please check used packaging for tears, signs of compression, pressure marks, perforations or other da-
mage before use. Please do not use damaged packaging. Note that a flight case is not a suitable shipping
packaging and is therefore not accepted. Please never pack devices together (e.g. Z4 Foot E633
Head), but send them separately. As it is our responsibility to use suitable shipping packaging for re-
turn shipping, we reserve the right to use a new original packaging if necessary and must also invoice it.
Original Packaging
Our original packaging consists of particularly thick cardboard material and is equipped with special, cus-
tom-made molded foam parts for each model.
This packaging can be used several times - do not throw it away!
Tubes
When replacing the power amp tubes, the operating point (BIAS) must be set. If you use ENGL tubes with the
same “grade”, the operating point does not have to be set.
When replacing the preamp tubes, please be ensured that the input tube will be replaced with a specially
selected ENGL FQ (First Quality) ECC83 / 12AX7. The remaining preamp tubes should be replaced with ENGL
Selected ECC83 / 12AX7.
Whilst the information contained herein is correct at the time of publication, due to our policy of
constant improvement and development, ENGL AMPLIFICATION reserves the right to alter specifi-
cations without prior notice.