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Introduction
Your new AP812/818 Mixer/Amplifier is designed and built to provide long-term trouble
free performance. Drawing on over thirty years of experience in the design and manufac-
ture of powered mixing consoles, Yorkville engineers were able to optimize the design
of the AP812/818. Including comprehensive features such as rack-mountability, quiet
internal fan cooling, two stereo input-channels with cue buttons, headphone monitoring
(of both the cue and monitor busses), phantom powering, dual 9-band EQ’s, power amp
channels and EQ’s assignable to Left/Right stereo operation or Main/Monitor mono opera-
tion, 255-preset digital signal processing, dual level-meters, 800 watts of stereo power
built-in, both 1/4-inch phone plugs and Speakon® output connectors.
Terminology
• 3-pin microphone inputs are referred to as XLR connectors.
• 1/4-inch jack sockets are called phone connectors.
• Balanced 1/4-inch inputs or outputs are called TRS or Tip-Ring-Sleeve
• Master control and mixing channels are called busses.
• Overload indicators are called Clip LED’s.
• Patch cables with dual conductors plus shielding and ring-tip-sleeve (stereo) 1/4-
inch phone plugs are referred to as balanced patch cables.
Basic Features
Channels 1 - 8 (1 - 14)
• XLR MIC and balanced TRS LINE inputs with low-noise input circuit design.
• Balanced LINE inputs accept either balanced or unbalanced lines.
• PHANTOM power (24 volts).
• Extremely wide input GAIN-adjustment.
• MONitor send controls are post-EQ and pre-fader.
• Three-band EQ with +/-15 dB of range and a sweepable mid (80 Hz - 8 kHz).
• Post-EQ, post-fader, EFX (effects) send controls.
• PAN controls provide constant gain levels at all settings.
• Increased circuit headroom and gain for a more flexible mix.
• Gold internal bus-interconnects for long life and maximum signal integrity.
• CLIP LED’s indicate even the briefest peaks, and fire at -3 dB, well before the
onset of actual clipping, at any and all active channel stages.
Stereo Channels (9/10, 11/12, 15/16 & 17/18)
(see diagram on following page)
• Left and Right 1/4-inch balanced TRS LINE inputs accept either balanced
or Unbalanced lines.
• The LEFT TRS input may be used for connecting a mono source and will inter-
nally patch it to the RIGHT channel input circuitry.
• LEFT and RIGHT RCA inputs.
• LOW, MID and HIGH frequency shelving EQ (+/- 15 dB).
• BALANCE control
• CUE buttons let you preview these channels through headphones with the
level faders shut off.