MICROMIX
MICROMIX
INTRODUCTION
We have coupled our extensive experience in the development and production of powered
mixers, (with state of the art, computer assisted design technology) to create the smallest,
lightest, and most powerful combination mixer/amplifiers available. We at Yorkville Sound are
confident that you will find your new
MP8D
to be an efficient and versatile solution to your
mixer needs. This manual contains information to help you get the maximum performance
from your
MP8D
. We hope you'll take the time to read it.
INPUT CHANNELS
1. MICROPHONE & LINE INPUTS
The
MP8D
features standard XLR type low-impedance MIC IN connec-
tors on all 8 channels. These microphone inputs are electronically bal-
anced for maximum noise suppression and have characteristics matching
all low impedance dynamic microphones. 24 Volt DC phantom power is
activated via the back-panel PHANTOM push-button, this enables the
MP8D
to use condenser microphones. (Note: condenser and dynamic
mics may be used together with the PHANTOM power activated. It will
not affect the performance of the dynamic mics). Additionally, there are
high-impedance 1/4" BAL LINE IN jacks on channels 1 to 6. These are
electronically balanced line-level inputs, but will accept either balanced,
or unbalanced input cables from high impedance microphones, guitars,
amplifier Line outputs, synthesizers, electric pianos, etc. (Note: when
connecting a balanced signal, employ balanced patch cables with a ring-
tip-sleeve (stereo) 1/4" plug on the mixer end). Channels 7 and 8 have
dual TAPE/CD/LINE RCA-type inputs, (a phono preamplifier must be con-
nected to the
MP8D
inputs for optimum turntable performance).
Do not connect signals to both types of inputs on any one channel (e.g.
the MIC and LINE IN's on channels 1 to 6 or the MIC and TAPE/CD/LINE
IN's on channels 7 and 8). To do so will cause improper operation of the
input circuit. (Note: you may connect a stereo source to channels 1
through 6 but you must use two channels, one for left and one for right).
2. CHANNEL GAIN CONTROLS & CLIP LEDS
The GAIN control has a range of 40dB. This adjustment determines both
the input sensitivity of the channel and the signal level sent to the MAIN
mixing bus.* (The
MP8D
's channel circuitry does not require separate gain
and level controls.) The CLIP LED is set to illuminate when the channel's
overall signal level is 3dB below the onset of actual clipping distortion. As
a result, small amounts of LED activity are acceptable; however, frequent or
continuous activity indicates the need to turn down the GAIN control.
In audio terminology, a bus is a mix-down channel where all the signals
from the input channels are blended into one signal. The
MP8D
has three
busses, MAIN, MONITOR and EFFECTS.
3. CHANNEL LOW & HIGH EQUALIZATION
The
MP8D
's LOW and HIGH EQ controls independently adjust the bass and treble frequencies
for each channel. The gain range for each control is plus or minus (+/-) 15dB to provide versa-
tile equalization consistent with the clean simplicity of the
MP8D
's design. As with all equaliz-
ers, boosts at one or more frequencies increase the channel's signal level. If the channel is
already at a fairly high operating level, this may cause clipping in which case the CLIP LED will
light. Reduce the GAIN setting and/or the EQ boosts if CLIP activity is excessive. (Note: center
position reflects a neutral or flat EQ control setting; however, lower EQ control settings may be
effectively employed to reduce feedback and/or distortion.)
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