Yorkville M1610-2 - Manuel (Page 4)

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Channels 5 and 6 have very high impedance, unbalanced ¼-inch inputs which are opti-
mized for instruments such as electric basses, acoustic electric guitars etc. Stereo chan-
nels 7/8 and 9/10 have left and right ¼-inch balanced LINE in jacks as well as mono
gold-plated XLR low impedance microphone inputs. The ¼-inch inputs may be used to
connect a stereo CD player, tape deck or an additional mixer etc. A phono pre-amplifier
must be connected to the M810/M1610 inputs for optimum turntable performance.
Connecting signals to both types of inputs on any one channel (MIC and LINE in) is
not recommended. To do so may change the gain 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 and Pan appropriately or sum to
mono using a ‘Y’ cable.
2. Channel 1-6 TRIM Controls and SET LEDs
The first 6 mono channels of the M810/M1610 have been equipped with an input TRIM
control and are also protected by an overload protection circuit. The TRIM controls are
used to make sure that an ideal signal level is flowing through the channel, no matter
what the input source. Each channel has a green LED that will flash when the proper sig-
nal level has been reached. The channel overload protection circuit will provide additional
protection from clipping on peaks of up to 16 dB above normal operating levels.
To set the TRIM
i. Turn down the channel LEVEL control,
ii. With a normal signal present at the input, turn up the TRIM control until the green
LED just starts to flash (when the signal peaks).
iii. You can then use the LEVEL control to set the channel volume level. Increasing
the TRIM beyond this point will compress the signal on that channel.
3. Channel LEVEL Controls and CLIP LEDs
This adjustment determines the signal level sent to the MAIN mixing bus. The CLIP LED
will illuminate when the channel’s overall signal level is 3 dB below the onset of actual
clipping. As a result, small amounts of clip LED activity are acceptable, however frequent
or continuous activity indicates the need to turn down the LEVEL 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 M810/M1610 has 5 busses: MAIN
(left and right), MONITOR, EFFECTS and RECORD OUT.
4. Channel Lo, Mid, and Hi Equalization
The M810/M1610 tone controls adjust the bass, middle and treble frequencies for each
channel independently. Center frequencies have been carefully selected to help achieve
the best quality of sound. Bass is centered on 40 Hz, Mid at 700 Hz and the Hi is at
12 kHz. The adjustment range for each control is +/- 15 dB. These parameters provide
versatile equalization consistent with the clean simplicity of the M810/M1610’s design.
As with equalizers, boosting one or more frequencies increase the channel’s level. If the
channel is already at a high level, clipping may occur, in which case the clip LED will
illuminate. Reduce the LEVEL setting and/or the Equalizer if clip activity is excessive.
Note: The center position reflects a neutral or flat EQ control setting; however, turn-
ing down EQ settings can be used effectively to reduce feedback and/or distortion).
5. Channel MON Controls
The MON control (monitor send) on each channel varies the amount of signal being sent to
the monitor bus in the M810/M1610. In the mono channels the MON signal is pre-LEVEL
control, post- EQ and post-TRIM. It is taken before the LEVEL control so the monitor signal
can be mixed independently of the MAIN mix. As a result, channel EQ and TRIM settings do
affect the sound of the monitor signals, while the channel LEVEL controls do not affect the
MON signal. The MON signal in the stereo channels is pre-LEVEL and pre-EQ.
Note: With an independent monitor mix, it may be beneficial to connect a graphic
equalizer between the MON output and the monitor amplifier (Power AMP IN B,
external amplifier or powered speakers, depending on how you have it set up) to
help control feedback.
-3
-20
+6
+3
0
-10
+10
0 0
-
1
Set
LEVEL
Trim
dB
Line Mic
0 10
-15 +15 dB
-15 +15 dB
-15 +15 dB
0
5
2 8
7
6 4
3
9 1
10
clip
Pan
Mon
EFX
Lo
Mid
Hi
1