Atomic Bass Box, User Manual, Page: 6 / 10

6
EQ CONTROLS
The EQ is controlled by the 4 knobs in the bottom row. The EQ is always on but you can bypass it by
having all 4 of those knobs in the up (12 o’clock) position.
The EQ has 3 modes, selected by the EQ toggle switch which is located between the two mid EQ
knobs.
In all modes, the BASS and TREBLE knobs adjust the level of the low and high frequencies. In each
mode, the middle two knobs have
different functions.
BASS KNOB
- The Bass knob allows you to cut low frequencies by turning the knob to the left or
boost them by turning the knob to the right.
TREBLE KNOB - The Treble knob allows you to cut high frequencies by turning the knob to the left or
boost them by turning the knob to the right.
LEFT MID KNOB
-
(See description in MODES 1-3 below)
RIGHT MID KNOB
-
(See description in MODES 1-3 below)
EQ TOGGLE SWITCH
- This toggle switch allows you to select one of the three different EQ modes.
(Insert images of the switch in the three positions showing the function)
MODE 1
- 4-BAND EQ (TOP POSITION)
The knobs are BASS, LO-MIDS, HI-MIDS, and TREBLE. All knobs are used to boost or cut their
predetermined frequencies.
80Hz, 150Hz, 400Hz, 850Hz. Any knob set to the 12 o’clock position will not boost or cut that
frequency.
MODE 2
– 3-BAND EQ WITH SEMI-PARAMETRIC MIDS (MIDDLE POSITION)
The knobs are BASS, MIDS, FREQ, and TREBLE and act like a 3-band eq with a sweepable mids
section. The MIDS knob allows you to cut midrange frequencies by turning the knob to the left
or boost them by turning the knob to the right. The FREQ knob selects the center frequency of
the midrange band. Frequency range is sweepable logarithmically from 40Hz to 4kHz. Low pass-
bandpass-highpass all crossover at the FREQ point.
MODE 3 – 3-BAND EQ STATE VARIABLE FILTER (BOTTOM POSITION)
The knobs are BASS, FREQ, Q, TREBLE and act like a 3-band EQ with adjustment for the level of the
bass band and the treble band, but the mid level is fixed. FREQ adjusts the center frequency of the
midrange band from 254Hz to 2.3kHz with Q adjusting the bandwidth between 0.333 to 3.0.
ad
fet
tu
b
e
= 4-band = parametric = state variable eq
= ssa = tube = sva
= ratio = knee = attack
= comp = limit = level
= od = tube = fet
= hi mids = freq = q
ad
fet
tu
b
e
= 4-band = parametric = state variable eq
= ssa = tube = sva
= ratio = knee = attack
= comp = limit = level
= od = tube = fet
= hi mids = freq = q
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