Peavey VSX 48 manual Dynamics, EQ Screen

EQ Screen

Output Equalizers

Select 1-8 on the top of the EQ screen.

Filter:

Select any of the five independent filters to use.

Type:

Choices are: Parametric, Notch, Allpass1, Allpass2, Horn EQ, LPF-6, LPF-12, HPF-6, HPF-12, Low Shelf, High Shelf and Bandpass. Depending on the filter selected various options for adjustment are presented in the window.

Parametric: Frequency, BW (in oct), Level

Notch: Frequency, BW (in oct). Notch has a fixed attenuation on minus infinity and the BW is defined 3 dB from unity.

All Pass1: Frequency

All Pass2: Frequency and Bandwidth

Horn EQ: Turnover Frequency and Level

LPF6 and HPF6: Frequency

LPF12 and HPF12: Frequency and Q

Low and High Shelf: Frequency and Level

Bandpass: Center Frequency and Bandwidth

Dynamics

DYNAMICS:

Inputs A B C & D or outputs 1-8 should be selected on the top of the screen. While on the top of the screen push the data wheel and an arrow appears. Rotate the wheel to select which input or output you wish to adjust and press the data wheel. Dynamics in the input channels may be linked in pairs for stereo tracking on the Input pages on the Setup/Configuration screen. Most users should use the dynamics on the outputs as Limiters to protect speakers and amplifiers and as compressors on the inputs should this type of tonal modification be necessary.

Threshold:

The threshold is adjustable in .5 dB steps from –76 dBu to

+24 dBu. This control determines the minimum level when the compressor begins to limit the dynamic range. The compressor has no affect on the signal as long as the signal strength is below the threshold point. Once it passes the threshold point, the compressor begins to limit the dynamic range of the output according to the value set by the Ratio control.

Ratio:

The ratio determines how strong the limiting becomes once the threshold is crossed. Values of 1:1 (no compression) to 20:1 are possible. Ratios of 10:1 and above should be selected for speaker protection.

Attack:

The attack function sets the amount of time for the compressor to respond once the threshold has been crossed. Specifying this value allows the user to determine whether the compressor responds as a peak or RMS unit as very short attack times consider only peaks while times above 50 ms average these peaks and result in RMS response. We recommend attack times of between 50 ms - 100 ms be used when setting the limiters to protect the speakers from being overdriven by the power amps. It is the average power long term that causes speaker burn out. The transient peaks usually cause little damage if kept inside the speaker’s band limits.

12