Band EQ, Effects Send | Yorkville Sound AP818, AP812 instruction

This means that you custom-equalizefor the monitor system using the AP812/818’s EQ2 equalizer or an external EQ patched between the AP812/818’s MON OUT jack and the external power amp you are using for monitors.

User tip: In order to shut a channel off completely, it will be necessary to turn down the MON send, as well as the channel fader.

3-Band EQ

Equalization is varied by four controls labeled HIGH, MID, SWEEPABLE MID (variable from 80 Hz to 8 kHz), and LOW. Each control can either boost or cut the amplitude of its frequency band by 15 dB. This is a considerable amount of gain change, roughly equivalent to a 150% variation in audible loudness. It is therefore wise to use boost set- tings of not more than +3 dB to +6 dB in order to avoid feedback and/or distortion.

User tip: On the other hand, -15 dB of CUT-capability can come in handy for solving certain mic or line problems. For example, substantial LOW and HIGH cuts can help get rid of feedback plus puffing and thumping noises from harmonica mics. Flattop guitar mics or transducers can often benefit from a slight MID cut to fatten the sound, and direct or miked bass inputs usually benefit from a fairly substantial LO cut to avoid main system distortion.

3-Band EQ - Channels 9/10, 11/12, (15/16 & 17/18)

LOW, MID & HIGH shelving EQ is provided for the stereo channels. Here again, the gain range is plus/minus (+/-)15 dB. As a result, care should be taken in adjusting the EQ above center position as a small adjustment can represent a large gain change.

Effects Send

The EFX send control varies the amount of post-EQ, post-faderchannel signal sent to the master EFX bus. The output of the EFX bus goes first to the EFX SEND

/FOOTSWITCH jack and then to the internal 16-bit processor. The output of the effects processor then goes to the MAIN master section to be mixed with the signals going there direct from the input channels.

Cue Button - Channels 9/10, 11/12, (15/16 & 17/18)

The CUE feature enables you to preview channel signals via headphones before they go to the main and/or MONitor bus. The CUE signal is post-EQso that the channel equalization will be in effect through the headphones. However, it is pre-faderso you will need to shut the channel off through the mains and monitors when cueing. Use the PHONES LEVEL to adjust cueing volume.

To employ this feature, simply follow these steps:

a)Connect a tape or CD-player to channel 9/10 and/or 11/12 (15/16, 17/18).

b)Pull the channel fader all the way down and turn the MON send off.

c)Depress the CUE button. Now that channel will have prominence through your headphones.

d)Cue up your tape or CD track through the phones, then put it on play hold/ pause.

e)When you are ready to insert the recorded material, simply punch the CUE button into the up position, then take the recorded material off play hold/ pause and bring up the channel fader and MON send to the desired mix lev- els.

User tip: When you have inserted the cued material into the monitors, you will be able to adjust its monitor mix level via headphones since the monitor bus signals are always present through the phones when no channels are on CUE. The recorded material’s main mix level will be audible to you through the main speaker system.

Pan or Balance Controls

This control directs the post-fader output of the channel between the LEFT and RIGHT MAIN masters. In a stereo setup, the PAN/BALance can be used to position the aural image of the channel left or right within the stereo listening field.