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Equalizer (EQ): - Frequency selective amplifier
Controls:
1. Level Control
a) Continuously variable (also called 'sweepable'): - You pick any amount of boost or cut
b) Stepped (also called 'detent'): - This will have click stops (detents) at all listed levels
2. Frequency select - can be continuously variable or stepped
Console EQ
1. Set frequency with Level controls a) 2-band with High Frequency and Low Frequency (Shelving EQ): - HF @ 10kHz - LF @ 100 Hz
b) 3-band: - LF & HF shelving EQ @ 100Hz & 10kHz and Mid Frequency (MF) @ 1 kHz (Peaking EQ)
2. 3-band with set LF + HF (100Hz + 10kHz) shelving and MF with Frequency select between 200 Hz ~ 63 kHz (Peaking EQ)
3. 3-band with frequency selects in all bands LF & HF are shelving, MF is Peaking EQ
4. 4-band EQ with Frequency selects in all bands: - LF + HF = Shelving - LM + HM = Peaking
5. 4-band EQ with Frequency selects in all bands: - LF & HF: Shelving switchable to Peaking EQ - LM & MH: Peaking EQ with ‘Q’ (Bandwidth control)
Parametric EQ - 3 to 9 band EQ - All Peaking - Either continuously controlled or stepped - has a) Level controls (+/- 15dB) b) Frequency selects c) Q controls (bandwidth)
Graphic EQ - 3 to 31 bands - All Peaking EQ - All set Frequency (International standard: +/-15 dB level controls)
Cut-Frequency EQ (Cheaper EQ) - Level control between 250 Hz & 1 kHz - Has 3 sections: Bass | Mid (500Hz) | Treble
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