Engl Metalmaster 20 E304, Руководство оператора

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Power Soak Panel
Power Soak
nicht aktiv Power Soak
aktiviert Power Soak
aktiviert Power Soak
aktiviert
I. Full Power II. 5 watts III. 1 watt IV. Speaker Off
25 Power Range Selector: Use this switch to activate the Power Soak and select the desired power
level. The Power Soak works only in combination with the amp's Output "C" (jack 24)!
You have four options:
The first setting (I) is "Full Power." It deactivates the
Power Soak and feeds the power amp's full
output to the speaker output "C" (24, "Poweramp Output C 8 - 16 Ohms, Power Soak").
The second setting (II) is "5 watts." It activates the
Power Soak and reduces the power sent
to the speaker or cabinet connected to the Output "C" (24) to 25 percent (about 5 watts).
The third setting (III) is "1 watt." It activates the
Power Soak and reduces the power sent
to the speaker or cabinet connected to the Output "C" (24) to 5 percent (about 1 watt).
The fourth setting (IV) is "Speaker Off." It activates the
Power Soak , whose resistors convert the
power amp's full output to heat, and switches the cabinet connected to the Output "C" off.
CAUTION: The Power Soak circuit works only in conjunction with an 8-ohm or 16-ohm speaker
(or cabinet) connected to the Output "C" (24). Make absolutely certain a speaker is connected
to the Output "C" - for example, the Combo amp's internal speaker - before you engage the
Power Soak by setting switch 25 to "5 watts" or "1 watt."
Poweramp Output "C" (24) and the power soak circuit is disabled whenever a ¼" jack plug is
connected to the Output "A" (22). In other words: if you intend to employ the Power Soak
make sure to connect the cabinet or speaker to the Output "C" (24) and at the same time make
certain there is no ¼" jack plug connected to the Output "A"(22)!
Heads up: When activated, the Power Soak's resistors convert some or all of the power amp's
output into heat. These heavy-duty resistors reside on a circuit board behind behind a steel grille.
Ventilation is important for every tube amp, but all the more so for this amp because the
temperature around the Power Soak circuitry can climb quite steeply depending on the Master
volume and
Power Range Selector settings. So, make sure air can circulate freely around the back
of the amp!
Do not operate the amp at peak loads – that is, with the Master knob set to position 5 or beyond,
pushing the power amp hard into overdrive - for longer periods with the
Power Soak activated
because its power resistors may overheat!
Important tips from the designer:
You can use the Power Soak , which attenuates the signal sent to a connected 8-ohm or 16-ohm
cabinet, for several purposes. For example, you may want to shape your tone with moderate (!)
power amp saturation, but the volume with the Master knob cranked may be too loud for the
situation or location. In that case, simply cut the power sent to the speaker. You can opt to reduce
output by three quarters or even down to just one watt.
The "1 Watt" setting drastically reduces the volume level, though it will still be loud enough for
monitoring during recording sessions.
The
Power Soak Selector's "Speaker Off" is the setting of choice when you want to mute
the speaker for direct-to-desk recording.
The power amp's entire output is then fed to the
Power Soak's heavy-duty resistors, which ensure
the power amp gets the load it needs to run safely.
If you are using the
Power Soak in combination with the Clean channel, don't drive the
power amp too hard by setting the Master to position 5 or beyond for a longer period
because the power resistors' temperature will rise sharply.
If you do set the
Master to position 5 or beyond, I highly recommend that you back off the Bass
and Input Gain knob settings, particularly for the Clean channel, to prevent undesirable clipping.
Bear in mind the golden rule that a speaker or cabinet may be only connected to the Output "C"
(jack 24) when you intend to employ the Power Soak. When in doubt, always check first!
If you want to record via the
Line Out without a connected speaker – typically a cabinet connected
to the head – simply select "Speaker Off".
The
Power Soak's heavy-duty resistors will provide the necessary load for the power amp.
1 watt
Full Power
5 watts
Speaker off
Power
Range
Selector
1 watt
Full Power
5 watts
Speaker off
Power
Range
Selector
1 watt
Full Power
5 watts
Speaker off
Power
Range
Selector
1 watt
Full Power
5 watts
Speaker off
Power
Range
Selector
Important note:
the Power Soak only
affects the 8 Ohms
Poweramp Output!
1 watt
POWER SOAK
R
Full Power
5 watts
Speaker off
Power
Range
Selector
26