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© 2006 ANACON Technology
HP
(High Pass) filter
This is an active 2
nd
order (12db/octave) 125Hz high-pass filter that can be
switched in before the equalizer section. HP filter can efficiently remove
boominess from some loudspeaker cabs and is very efficient in tightening up
the bass response. Turn the filter on and boost bass at the same time for
strong tight bottom rich tone.
MIDDLE
Most of the tone character and color is determined by the midrange and
treble. TUBEWONDER’s MIDDLE EQ-section has 3 switched mid
frequencies and a dual function HIGH-CUT filter in addition to the TREBLE
control.
The MIDDLE potentiometer together with its center frequency switch “Freq”
is a very versatile tool that gives a very wide range of tone adjustment. The
standard center frequencies are:
•
Low
: 375Hz
•
Mid
: 750Hz
•
High
: 1300Hz
TREBLE
TREBLE switch changes the boost/cut characteristic from shelving to
peaking around 3.2kHz.
Set the switch to “peak/dip” position and turn the pot to about +3 … then
flip the switch to shelving position: now the extreme treble range is also
enhanced – that’s where the shimmer is. It may be too much with a
Telecaster or a Stratocaster’s bridge or mid pick-up so you may want to back
off on the control a bit.
Now turn the treble pot to about –4 or so …then flip the switch to peak/dip
position: this will give you a darker tone but with the edge of pick attack
cutting through.
HIGH-CUT
This is an active low-pass filter with 2 switched cut-off frequencies and
variable slope.
The switch positions are:
1. Left:
Soft 900Hz
2. Center. Off
3. Right: Hard 400Hz
“Soft” position is mainly aimed at fine-tuning the shimmering end of the
treble range while “Hard” setting is useful for achieving very dark tones and
taming high order harmonics that may arise when playing with heavy
distortion.
All controls provide ca +12/-12db of boost/cut at center frequencies in
peaking position as standard. Bass & Treble in shelving position p/-
15db control range at the extremes of their respective frequency ranges.