API The BOX - Page 23

API “The BOX” Operator’s Manual
23
NOTE: The band-pass filter in the equalizer should not be confused with the high-
pass filter in the input channels.
Additional information about the 550A equalizer can be found at:
http://apiaudio.com/550a.html
Mid Frequency:
• Center Frequency (knob & blue numbers):
200Hz, 400Hz, 600Hz, 800Hz, 1.5kHz, 3kHz, 5kHz
• Boost/Cut (ring & white numbers):
+/- 12dB in 5 steps each
FLTR (band-pass filter): Activates the band-pass filter
• -3dB @ 50Hz
• -3dB @ 15kHz
• Illuminates when engaged
High Frequency:
• Center Frequency (knob & blue numbers):
2.5kHz, 5kHz, 7kHz, 10kHz, 12.5kHz, 15kHz, 20kHz
• Boost/Cut (ring & white numbers):
+/- 12dB in 5 steps each
• Peak or shelf
High Frequency Shelving: Changes the high frequency band from a peaking
EQ to a shelving EQ
• All frequencies above the selected center frequency will be boost or cut
Low Frequency:
• Center Frequency (knob & blue numbers):
30Hz, 40Hz, 50Hz, 100Hz, 200Hz, 300Hz, 400Hz
• Boost/Cut (ring & white numbers):
+/- 12dB in 5 steps each
• Peak or shelf
Low Frequency Shelving: Changes the low frequency band from a peaking EQ
to a shelving EQ
• All frequencies below the selected center frequency will be boost or cut
IN: Places the EQ in the signal path when engaged
• Silent operation
• Illuminates when engaged