CA30D Acoustic Amplifier
The Front Panel:
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1: Power. Use this switch to apply power to8: Mid. This serves as the midrange control
the amplifier: the amp is on when the topfor both channels. Adjust this control to
of the switch is depressed, off when theget the best projection and midrange
bottom of the switch is depressed. Thetones for your instrument. The center
switch illuminates when the amp is on.point of the mid control is chosen by the
2: Line Out. Use this jack to connect a highsetting of the contour control (#7).
impedance, unbalanced line level signal9: Low. This serves as the bass control for
to a house sound board, a recording con-both channels. Adjust this control to get
sole or another amplifier.the best sounding bass response for your
3: Insert. Use this jack to add external effectsinstrument. Excessive boost of the low
to the signal. The ring = send (line out),control can cause an unnatural howling
tip = return (line in), sleeve = ground.(acoustic feedback from your instrument)
This jack can also be used to Ochain� mul-and should be avoided.
tiple amplifiers together, since connecting11,13:Input 2, Input 1. The signal output from
to this jack does not interrupt the signalyour acoustic instrument, tape player,
going to the amplifier. (See the illustra-rhythm machine, high-Z microphone or
tions on page 5 for more information.)other source may be connected to either or
4: Effects Level. Use this control to adjustboth of these jacks by means of a shielded
the amount of digital signal processingsignal cable. Each of the input jacks is gov-
applied to the output signal. erned by its corresponding gain control
(#10 for Input 2, #12 for Input 1). The sig-
5: Effects Mode. Use this control to select the
type of digital signal processing applied tonals from these two jacks are summed
the output signal. (See the section entitledtogether after their gain stages.
OThe DSP Section� on page 6 for more infor-10,12:Gain 2, Gain 1. Use these controls to set
mation.)the input gain level for the corresponding
6: High. This serves as the treble control forinput jack. These controls set the level of
the input signal and serve as the amplifi-
both channels. Adjust this control so your
high notes and harmonic overtones areerOs volume controls.
lively but not overpowering.14: AC Line Cord. (Rear panel, not shown)
The grounded power cord should only be
7: Contour. Use this control to set the center
point of the mid control. This controlplugged into a grounded power outlet
should be set at the frequency whichthat meets all applicable electrical codes
and is compatible with the voltage,
gives you the most natural midrange
tones. power, and frequency requirements stat-
ed on the rear panel. Do not attempt to
defeat the safety ground connection.
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ACEC
