Mackie TH-15A Benutzerhandbuch

9

The OL (overload) indicator lights when the 

amplifiers in the TH-15A are near the clipping point. It 
is okay if the OL indicator blinks occasionally, because 
this means that the transient peaks are just reaching 
the maximum output of the amplifiers and you are 
getting the most from your TH-15As. 

If the OL indicator is blinking frequently or lighting 

continuously, turn down the LEVEL control [3] on 
the TH15A or turn down the signal at it source (e.g., 
the mixing console) until the OL indicator blinks 
occasionally or not at all.

This control gives you up to 15 dB boost or cut above 

12 kHz. The circuit is flat (no boost or cut) 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 remove high frequency 
hiss.

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 (U). 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.

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.

This control gives you up to 15 dB of boost or cut 

below 80 Hz and it is also flat at the center position
(U). This frequency range represents the punch in bass 
drums, bass guitar, fat synth patches, and some really 
serious male singers.

This switch allows you to bypass the EQ section. 

When the switch is out (OFF), the EQ section is 
bypassed and the EQ knobs have no effect on the signal. 
When the switch is pushed in (ON), the EQ controls can 
be used to tailor the frequency response of the TH-15A.

Use this switch to turn the TH-15A loudspeaker 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.

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 11 for information about replacing the 
fuse.