API Audio 5500 Dual Equalizer handleiding

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Handleiding

5500 Dual Equalizer API

2.0 Front Panel Controls

2.1 Bypass

BYPASS: When BYPASS is engaged, the unit enters a true hard-wire bypass,

the output is connected directly to the input.

• There are no electronics in the signal path when BYPASS is engaged

• Illuminates in red when engaged

2.2 Channel Controls

The 5500 is a two-channel unit that can be used as two separate mono EQs or in stereo.

Each channel has an identical set of controls, all of which will be outlined in the following

sections.

2.2.1 IN

IN: When IN is engaged, the equalizer is fully operational.

• When it is “out” (not engaged) there is no equalization applied

• IN differs from BYPASS in that the electronics and output transformer

are still in the signal path

• Illuminates in blue when engaged

2.2.2 Four-Band Equalization

The 5500 Dual Equalizer offers four overlapping bands of equalization that enables

exception control over tonal shaping: LO, LO-MID, HI-MID, and HI.

2.2.3 Frequency Selection

Each band equipped with seven (7) fixed frequency selections:

LO: 30Hz, 40Hz, 50Hz, 100Hz, 200Hz, 300Hz, 400Hz

LO-MID: 75Hz, 150Hz, 180Hz, 240Hz, 500Hz, 700Hz, 1kHz

HI-MID: 800Hz, 1.5kHz, 3kHz, 5kHz, 8kHz, 10kHz, 12.5kHz

HI: 2.5kHz, 5kHz, 7kHz, 10kHz, 12.5kHz, 15kHz, 20kHz

2.2.3.1 Peaking and Shelving

All equalizer sections have peaking (also called “bell” in the UK) response characteristics.

While the central frequency of that boost (or cut) is the one engraved on the panel,

there is of course amplitude variation that occurs to a lesser extent on nearby

frequencies. This is termed the Q where higher Q’s have less effect on adjacent

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