551 – EQ פרמטרי

551

מודול EQ 3 בנדים קלאסי ויוקרתי מסדרת 500

• תחומי תדרים ו-GAIN (נמוכים)- LOW EQ : +/-15 dB shelf or peak (35 Hz, 60 Hz, 100 Hz or 220 Hz) ,
• תחומי תדרים ו-GAIN (תדרי אמצע MID)- (Mid EQ: +/-15 dB  (200 Hz, 350 Hz, 700 Hz, 1.5 kHz, 3 kHz and 6 kH
• תחומי תדרים ו-GAIN (תדרים גבוהים High) Hi shelf: +/-15 dB shelf or peak, selectable for 8 kHz and 16 kHz
• חיתוך נמוכים (LO-CUT)  – 12 dB / octave design at 80 Hz

EQ IN
Engages all bands of the equalizer except the high-pass filter.

8K / 16K + HF LEVEL
With the switch out, the center or corner frequency of the high band is 8 kHz. With the button pressed, the center or corner frequency changes to 16 kHz. Between this switch and the HI PEAK switch, you have 4 different EQ curves to finesse the high frequency content. The HF knob adjusts up to 15 dB of boost or cut at the selected high frequency.

HI PEAK
When the button is out, the high frequency band operates in shelf mode, boosting or cutting above the corner frequency at approximately 6 dB/octave. Below the corner frequency the amount of boost or cut gradually diminishes. With the HI PEAK button pressed, the high frequency band changes to peak mode with a bell shaped boost or cut curve. The peak mode utilizes an inductor and capacitor circuit to create the bell-shaped curve.

MID FREQ + MID LEVEL
The MID FREQ rotary switch has 6 positions to select the center frequency of the mid band EQ stage. This circuit utilizes an inductor and capacitors to shape the EQ curve, in the same way as Rupert Neve’s console designs of the 70’s. The frequencies chosen are 200 Hz, 350 Hz, 700 Hz, 1.5kHz, 3 kHz and 6 kHz. 200 Hz is especially useful for cuts on individual tracks within a dense mix. The MID knob adjusts up to 15 dB of boost or cut at the selected mid frequency.

MID HI Q
The resonance (or Q) of the mid band at maximum boost is typically 2 when the button is out. When the MID HI Q is pressed at maximum boost, the Q narrows to approximately 3.5. The Q widens nicely with less boost or cut, as is typical for passive EQ circuits.

HPF
Engages an 12dB per octave High Pass Filter with an 80Hz corner frequency.

LOW FREQ + LF LEVEL
The LOW FREQ rotary switch has 4 positions for selecting one of four corner or center frequencies for the low band EQ section. The frequencies are 35 Hz, 60 Hz, 100 Hz and 220 Hz. The LF knob adjusts up to 15 dB of boost or cut at the selected low frequency. Cut can be used as a variable (and perhaps more gentle) alternative to using the HPF.

LO PEAK
When the button is out, the low frequency band operates in shelf mode, boosting or cutting below the corner frequency. Above the corner frequency the amount of boost or cut gradually diminishes at approximately 6 dB/octave. With the LO PEAK button pressed the low frequency band changes to peak mode with a bell shaped boost or cut curve