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Ashdown Engineering PRO FX Manual Del Usuario página 7

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ASHDOWN ENGINEERING - PRO FX
Specifications:
Specifications:
- Input Gain Control
- Ratio Control
- Threshold
- Momentary switching
- 18 volt - Power Supply (Not Included)
Weight & Dimensions:
Weight & Dimensions:
H: 58mm (inc Pots) - 2.2"
W: 105mm - 4.1"
D: 117mm - 4.6"
Kg: 0.6
Lbs: 1.3
USER GUIDE
STUDIO COMPRESSOR
The Studio
The studio is a conventionally styled "above threshold " type
compressor/ limiter but with a few enhancements.
By Utilising a continuously changing threshold at the
setting chosen with the threshold knob a more sonically
desirable compression curve is produced that avoids the
sharp level changes associated with
a conventional example of this type of compressor.
The threshold is adjustable from +10db to -30db . A gain
control is provided to recover any lost output due to com-
pression, this control has a range of +/-20db.
The Ratio control has a range from zero
to almost infinity (Brick wall) the sweep is arranged so that
the midpoint of rotation on the control is approx 3.5:1.
This type of compressor has a vast number of uses which
cannot be covered here so only two examples will be men-
tioned.
To use as a limiter for protection of the
USER GUIDE
amplifier against clipping and distortion the Studio should
be paced between the pedal board and the amplifier, set
the amplifier to normal stage volume and then add a touch
more volume.
Switch on the pedal set the ratio and threshold control to
max , advance the gain control until the preset stage vol-
ume is reached. Finally reduce the threshold till the normal
stage volume is recovered, at this point the pedal will be
just on the point of limiting and should prevent any surges
of signals that would otherwise cause overload.
Using the pedal as a general compressor the threshold
should be set to max initially and the ratio set to mid point,
Adjust the gain control to give no noticeable change in level
when the pedal is switched in/out, now reduce the thresh-
old until the desired level is reached before the onset
of compression and adjust the ratio to give the desired
amount of compression, once happy readjust the gain
control to recover the original signal level so that when the
pedal is switched in/out there is no change in level.

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