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What is Equalization?
Equalization (or EQ) is so called because its primary function is to accurately “equalize” or balance the frequency
profile of a signal for a given application or environment. This is especially noticeable in large rooms, which can
emphasise “boominess” in the low frequencies or rooms with soft furnishings, which can absorb a lot of the high
frequencies. An equalizer can be set to reduce “boomy” low frequencies or replace lost high frequencies.
At best, human ears can detect sound from 20Hz to 20000Hz (or 20Hz 20kHz). All natural (and some unnatural)
sounds have many harmonics and overtones across the listening spectrum, giving them varying tonal
characteristics. We often refer to the lowest frequencies as “Bass” and the highest frequencies as “Treble” but this
only describes 2 regions of tone, whereas the listening spectrum could be divided into as many sections as desired
in order to give more accurate measurement and manipulation of the sound characteristics.
EQ can also be used as a tool to push a signal forward in a mix or set it further back into the mix by boosting or
cutting key mid frequencies, reducing feedback by cutting frequencies which are prone to resonance and boosting
specific frequencies to lift certain instruments in a piece of music.
Connection
The unit can be used in 2 configurations…
1. As 2 independent mono graphic equalizers e.g. for 2 separate microphones on channel inserts
2. As a stereo left & right EQ e.g. as a main L+R EQ on master inserts or between the mixer and amplifier.
Before connecting to an amplifier or other equipment, turn down all volume controls to avoid loud noises which may
cause damage to other equipment. Always switch amplifier power on last in line with volume levels down. Use good
quality 6.3mm jack or XLR signal leads to connect the equalizer to allied equipment. The unit can be used as 2
independent mono equalizers (e.g. for 2 microphone channels, requiring specific EQ profiles). Connect mains
power via the IEC (ensuring lead is in good condition and the voltage selector is same as the supply voltage) and
switch the POWER on.
7. IEC mains inlet
8. Mains voltage selector
9. Output 6.3mm jack
10. Outputs - XLRM
11. Inputs - XLRF
12. Inputs - 6.3mm jack
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