Summit Audio FeQ-50 Passive Tube/Solid State EQ - Manual (Page 5)

Model FeQ-50 4-Band Passive, Parametric Equalizer 5
Front Panel
High-Mid Band
The Boost/Cut controls can boost or attenuate the chosen
frequencies by up to ±14dB.
The Bandwidth (Q) is slightly less than 2 octaves in the
narrow setting and slightly more than 3 octaves in the wide
setting (maximum gain).
The center point of the filter band can be set to any of six
frequencies: 1.2 kHz, 1.5 kHz, 2.2 kHz, 3.3 kHz, 4.7 kHz
and 5.6 kHz.
High Band
The High-Mid EQ band can be set for either a peak or
shelving response and can boost or cut by up to ±14dB. The
center point of the filter band can be set to any of six
frequencies: 5 kHz, 7.2 kHz, 8.2 kHz, 10 kHz,
12.5 kHz, or 18kHz.
Bandwidth Control
On the two mid-bands, the bandwidth control sets the Q or
width of the bell-shaped response curve. The bandwidth
circuit employs a “proportional Q” design, which results in a
wider bandwidth at low boost/cut settings and a narrow
bandwidth at high boost/cut settings.
Peak or Shelving Response
The Low and High EQ bands can be set for either peak or
shelving response. In shelf mode, for example, the High band
continues to boost or cut frequencies above the center
frequency. In peak mode the High band creates a bell-shaped
response curve.
Boost/Cut
Bandwidth
Freq.
Select
+14 -14
0
kHz
3.3
4.7 5.6
2.2
1.5
1.2
Boost/Cut
Peak/Shelf
Freq.
Select
kHz
+14 -14
0
7.2
8.2 10 12.5
18
5