TOA Electronics TDX2 user manual OP1+4 Low PEQ 1 Ο 1K00Hz B=.34 0.0dB

8.Function Screens

8.1.Parametric Equaliser Screen

OP1+4 Low PEQ: 1 Ο

1K00Hz B=.34 0.0dB

All modes feature a total of 30 bands of fully flexible parametric equalisation (5 per output), with all sections selectable to Low or High frequency shelving response.

Each parametric section can be positioned at a frequency from 20Hz to 20kHz and features a wide range of 'Qs’ to produce response curves ranging from broad to notch. The gain control ranges from +15dB to -30dB in 0.1dB steps. Frequency steps are in 1/36 octave resolution for precise control. Since all filtering is achieved in DSP, all settings are re-settable with absolute accuracy and in ganged mode parameters track identically. Very narrow band notch filters (maximum Q of 128) can be achieved and unlike analogue filters these 'tight' Q filters are entirely stable. The maximum notch depth is -30dB.

Parametric filters are carefully implemented using Double Precision processing. This method is costly in terms of processing power but yields substantial benefits in terms of the TDX2’s exceptional noise performance and greatly improved low frequency stability.

To adjust parametric settings:

Select relevant channel by pressing the channel ‘GAIN’ button.

Use the ‘BACK’ and ‘NEXT’ keys to select relevant parameter screen.

Use the ‘FREQ’ control to adjust the frequency.

Use the ‘Q’ control to adjust Q.

Use the ‘GAIN’ control to adjust the gain.

(N.B. To show parametric filters in bandwidth (BW) rather than Q, go into the ‘system sub-menu’, select ’filter Q or BW’, select BW.)

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