Passive EQ
- Passive EQ Filters
- Broad Strokes
- e.g. Knif Soma, Pultec 1A, 52dB Audio Pequex, Chandler Curve Bender
Program EQ
- Boosts and Attenuates Symmetrically
- Broad Strokes
- e.g. Knif Soma Passive Tube EQ, All Pultecs, 52dB Audio Pequex, BAX (Shelves Only)
– Notice that Real Original Pultec has Tubes, but there are also Solid State Pultecs
Surgical EQ
- Sweep-able Frequencies and Q
- e.g. GML, Sontec
Summing EQ
- Boosting Only
- All Maag EQs
Graphic EQ
- No Discrete OP Amps and Indicators
- EQ with Fixed Frequencies
- Usually 31 or 15 or 10 or 5 Band, Some have a Proportional Q Such as API 560
API EQ
- Discrete OP Amps and Indicators (Capacitors)
- Proportional Q, Stepped Factors
- e.g. API 550(0), Avedis E27, CAPI BT50
Neve / British EQ
- Baxandall Shelves
- Inductor Mids
Vanilla EQ
- Vintage Neve, Trident, Chandler Red Devil
- OP Amps and Indicators
- Most Used EQ
- e.g. SSL
Paragraphic EQ
- Graphic EQ with Q
- Usually Many Bands
Transformer (MIC / LINE)
- Included in Most Above EQ Styles
- e.g. Neve Transformers 1073/1084/2254
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