Radial Engineering Ltd.
PowerTube™ Preamp
True to the Music
®
5
AIR
This switch introduces high end to accentuate harmonics. Adding air to a signal is often done
to hype a male vocal track or add breath the a female singer so that it cuts through the mix.
Another common use is adding shimmer to an acoustic guitar to accentuate the harmonics
and attack of the picking. You may even use it to add shimmer to cymbals. Experiment. When
not needed, simply turn it off.
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AIR Filter Response
HPF FILTER
A high-pass fi lter (low cut) is generally used in the studio to clean up excessive bottom end
that can render recordings muddy and cause some instruments to become indistinct. Bass
frequencies are so much longer and more powerful than highs, so controlling them can often
be very advantageous. Live sound engineers will often reduce the low end from acoustic
instruments to reduce resonance and prevent run-away feedback. Test the high-pass fi lter
so that you get a feel to how it works. You may fi nd it works really well on certain voices,
acoustic guitar and bass.
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High Pass Filter Response
