Blackstar Amplification Blackfire 200 Gus G Manual De Instrucciones página 7

30. Volume
This controls the overall volume of your amplifier. Turning it clockwise increases the
volume.
31. DPR (Dynamic Power Reduction)
The patented DPR control allows the output power of the
Blackfire 200 to be reduced anywhere from 200W (100%) down
to 20W (10%) of the rated power.
DPR works by controlling the power supply voltages to the KT88
output valves and also the level of drive signal into the power
amplifier stage. Importantly, there are no components placed
in between the output valves, the output transformer and the
loudspeaker – a relationship which is essential in the delivery of
valve tone.
In addition to reducing the output power of the Blackfire 200,
the DPR system actually controls the amount of power amplifier compression
too. Power amplifier compression is a key ingredient in the characteristics of low
powered valve amplifier tone and gives a very playable 'feel' to the Blackfire 200 at
reduced power settings.
We would recommend experimenting with the channel Gain and Volume, Master
Volume and DPR Control to achieve various combinations of preamplifier and power
amplifier distortion / compression.
Note: Generally speaking the more DPR is applied (i.e. power is reduced) the more
dynamic compression and power amp clipping will be experienced at any given
volume.
Clean DPR Operation
The DPR control is extremely powerful in fine-tuning the exact dynamic compression
characteristics of the power amplifier.
Channel Channel Gain Channel
Volume
Clean Low Mid
Clean Low High
Clean High High
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Master DPR Description/Sound Character
Volume
Mid High Maximum pre and power amplifier
headroom yields extremely dynamic
clean sounds.
High Low Increasing drive to the power amplifier
and reducing output power gives a
compressed clean sound rich in power
amplifier induced harmonics.
High Low Higher channel gain further increases
the power amplifier drive producing a
'full stack' crunch tone at only 20W
output power.
Crunch DPR Operation
The DPR control allows you to pin-point exactly how much valve overdrive you want
to come from the preamplifier section and how much is coming from the KT88s in
the power amplifier section.
Channel Channel Channel Master DPR
Gain Volume Volume
Crunch Low/Mid Mid Mid High
Crunch Mid High High Mid
Crunch High Mid Mid Low
Overdrive DPR Operation
The DPR control allows you to add power amplifier compression to your high gain
lead and rhythm tones. This is superb for encouraging really fluid lead playing rich in
power amplifier sustain and feel.
Channel Channel Channel Master DPR
Gain Volume Volume
Overdrive Mid Mid Mid High
Overdrive High Mid Mid Low
32. Power Indicator Light
The power indicator will light when the amplifier is switched on.
33. Standby
This switch enables the output stage. Always turn this switch on at least 30 seconds
after the Power switch (34). During short breaks in playing use just this switch to turn
'off' and 'on' the amplifier's output.
34. Power
This switch is used to turn the amplifier on and off. You should always turn this
switch on before turning on the Standby switch (33).
Description/Sound Character
Lower gain settings provide a dynamic
crunch utilising the full 200W of available
headroom.
At these settings there is a blend of the
distortion and compression generated in the
preamplifier and power amplifier valves. We
recommend that youexperiment to find your
'sweet-spot'.
Here maximum preamplifier gain is
combined with the lowest power amplifier
output for maximum valve saturation.
Description/
Sound Character
The maximum headroom from the KT88
power amplifier will yield incredibly tight
and dynamic overdrive at extreme volume
settings.
With maximum overdrive gain there is
loads of sustain from the preamplifier
which is augmented by the increased
power amplifier compression as the DPR
is set to minimum. Again, we recommend
that you experiment to find your 'sweet-
spot'.
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