Tapco THUMP TH-15A - Manual (Page 9)

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5. HIGH EQ
This control gives you up to 15 dB boost
or cut above 12 kHz, and it is also flat
at the center position (U). Use it to add
sizzle to cymbals, and an overall sense of
transparency or edge to the keyboards,
vocals, guitar, and bacon frying. Turn it
down a little to reduce sibilance, or to hide
tape hiss.
6. MID EQ
This is a midrange EQ control that
provides 15 dB of boost or cut centered at
any frequency between 100 Hz and 8 kHz.
The MID EQ circuit is flat (no boost or cut)
at the center position. This frequency range
includes most vocals (male at the lower end
of the range and female at the upper end
of the range), and the fundamentals and
harmonics for many instruments.
7. MID FREQ
This knob ranges from 100 Hz
to 8 kHz and determines the center
frequency for the MID EQ filter. This allows
you to zero in on the precise narrow band of
frequencies you want to have affected by
the MID EQ.
8. LOW EQ
This control gives you up to
15 dB of boost or cut below 80 Hz.
The circuit is flat (no boost or cut) at the
center position. This frequency range
represents the punch in bass drums, bass
guitar, fat synth patches, and some really
serious male singers.
9. DIRECT/EQ Switch
This switch allows you to bypass the EQ
section. When the switch is out (DIRECT), the
EQ section is bypassed and the EQ knobs
have no effect on the signal. When the
switch is pushed in (EQ), the EQ controls can
be used to tailor the frequency response of
the TH-15As.
10. POWER Switch
Use this switch to turn the active
loudspeakers on and off. The indicating
LED above the POWER switch lights when
the POWER switch is on and AC power is
available at the linecord socket. A second
power indicator is located on the front of
the cabinet.
11. Line Cord Socket and Fuse
Connect the detachable line cord to
this IEC socket securely, and plug the other
end into your AC outlet. Make sure the
AC power is matched to the AC power
indicated on the rear panel (under the IEC
socket).
The fuse is located behind the fuse cover,
at the bottom of the IEC socket. See the
“Troubleshooting” section on page 9 for
information about replacing the fuse.