5
REMOVABLE
PHOENI X
CONNECTOR
Lowell Manufacturing Company
100 Integram Drive
Pacific, Missouri 63069 U.S.A.
Call: 800-325-9660
Fax: 636-257-6606
Click: www.lowellmfg.com
Instruction Sheet
IS-MIX2
Issued: 4-27-17
When the MIX2
“LOW FILTER” switch is in the “ON” position, the low frequency content is rolled off in the “MAIN
OUT” output, “MIC” balanced output, and “LINE” balanced output. This is particularly useful in a case where
microphones are exhibiting bass frequency “boominess”, or for an application in a reverberent space (such as a
gymnasium) when low frequencies reduce speech articulation. We recommend that the low cut filter always be
engaged to act as horn protection (trumpet protection) when the sound system is feeding paging horns.
LOW CUT FILTER SWITCH
The red “PEAK” LED located on the front panel flashes when the peaks are approaching full output. Occasional
flashing of the “PEAK’ led is acceptable. A steady bright red glow could indicate that the MIX 2 mixer/preamplifier is
being over-driven, or there is sub-sonic or ultra-sonic oscillation in the system and these conditions should be
corrected.
PEAK LED (RED)
MUTING-PRIORITY SCHEME
The MIX2 mixer/preamplifier includes a unique voice-activated (VOX) ducking/muting circuitry. When a page is
made, other inputs (such as a music input) that are set up at a lower muting level, softly lower in volume during the
page. If the volume of the page is not strong, the music will only duck in volume (not be completely muted). If the
incoming page is strong in level, the music volume will be completely muted. When the page has been completed,
the volume of the music will return to its normal level. The MIX2 has two muting schemes that may be selected at
the “MUTE” switch on the rear of the unit. With the “MUTE” switch in the “2-8” position, an input to either the
channel 1 mic input or the channel 1 aux input, will mute all other channels mic and aux inputs.
With the “MUTE”
switch in the “A-B” position, an input to any of the channel 1-6 mic inputs or aux inputs, will mute the channel 7 aux
input (from either the channel 7
“A” or “B” RCA input jacks).
5) Finally turn up the rest of the input controls on the MIX 2 to the desired level to balance with the input that was set
in Step 3 (making sure that the peak light rarely flashes).
OPERATING INSTRUCTIONS
Setting the controls on the MIX2 is dependent on the particular application and system design , but there are some
basic guidelines that should be followed to maximize the performance of the mixer/preamplifier:
1)
Set your power amplifier’s level control all the way down (fully counter-clockwise).
3) Choose the most important input (for example the paging microphone) and turn up that input control while talking
into the microphone until the peak light starts to flash. Then turn down that control to where in normal use the
peak light no longer flashes.
4)
Turn up your power amplifier’s level control to the desired system volume.
2)
Set the “MASTER” volume control on the MIX2 to about 70% (about 2 o’clock).
The MIX2
“TAPE OUT” is available at parallel RCA phono jacks. The connecting output cable
should be wired with the pin “hot” or “+” and with the sleeve “common” or “-”. The tape output
jack is available to feed a recording device and is not affected by the master volume control or
the low cut filter.
TAPE OUTPUT
Sleeve
_
+
Pin
MAIN OUTPUT CONNECTION
The MIX2
“MAIN” “MIC” and “LINE” level outputs are available at a
removable Phoenix connector, and aux level outputs are also available at
parallel RCA phono jacks. A connecting RCA output cable should be
wired with the pin “hot” or “+” and with the sleeve “common” or “-” as
shown to the right.
The “MAIN” outputs are fed after the master volume
control and low cut filter.
Sleeve
_
+
Pin
G
+
_
_
G
+
LINE
MIC
MAIN OUT
