Specifications

12
Effect of the Contour Switch
The Contour switch provides a unique control that allows the Model 1400/1415
to emulate the sound of a classic tube bass amplifier. When pressed in (the
“Enhance” setting), a special kind of equalization curve is activated that provides
moderate boost at 45 Hz, deep attenuation at 240 Hz, and gentle boost that
peaks at approximately 3 kHz. This curve is illustrated below:
Even when Contour is on, the front-panel EQ controls are still operational. When
all of them are set to their “0” (flat) position, the boost or attenuation performed
by the preset Contour curve is as shown above. However, when any EQ con-
trols are turned left or right of their 12 o’clock (“0”) position, their boost or attenu-
ation effect is superimposed upon the preset Contour curve. This way, you can
start with the classic tube sound and customize it further still to complement your
instrument and playing style.
When the Contour switch is out (the “Flat” setting), the EQ controls operate nor-
mally, with no preset curve imposed.
ENHANCEFLAT
CONTOUR
40.000
30.000
20.000
10.000
0.0
-10.00
-20.00
-30.00
-40.00
20
100
1k 10k 20k
Ap
AUDIO PRECISION 1400 sweep LEVEL (dBm) vs FREQ (Hz)