User’s Manual
MIX 301
3-channel Audio Mixer
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68-1048-01 Rev. B
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© 2008 Extron Electronics. All rights reserved.
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FCC Class A Notice
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to
cause harmful interference, in which case the user will be required to correct the
interference at his own expense.
N
This unit was tested with shielded cables on the peripheral devices. Shielded
cables must be used with the unit to ensure compliance.
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Introduction
™
The MIX 301 is a three-input, one-output VersaTools line level
audio mixer. The MIX 301’s features include the following:
• Recessed trim potentiometers on the front panel for individual
input gain adjustments (from mute to +20 dB)
• Compact 1U, one-eighth rack, VersaTools metal enclosure
• Power indicators on both front and back panels
• Several mounting options, including rack mounting in an
Extron VersaTools or standard 1U rack shelf
• Three mono, balanced or unbalanced audio inputs
• One mono, balanced audio output
• Captive screw connections for ease of installation
O
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Extron
MIX 301
3 Channel
Mixer
MAX
12V
0.5a
Speakers
3
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Wireless
Microphone System
Wireless
Microphone System
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Microphone
MIX 301 • Introduction
1
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Installation and Operation
Mounting the MIX 301
The MIX 301 can be set on a table, mounted on a rack shelf,
mounted on the back of the rack, mounted under a desk or table,
or installed on a projector mount.
Tabletop use
The MIX 301 comes with four, self-adhesive rubber feet (not
attached). Follow these instructions for a tabletop installation:
1.
Attach the rubber feet to the underside of the MIX 301 near
the corners of the unit.
2.
Place the MIX 301 unit in the desired location.
UL rack mounting guidelines
The following Underwriters Laboratories (UL) guidelines
pertain to the safe installation of the MIX 301 in a rack.
1.
Elevated operating ambient temperature — If installed in
a closed or multi-unit rack assembly, the operating
ambient temperature of the rack environment may be
greater than room ambient temperature. Therefore,
install the MIX 301 in an environment compatible with the
maximum ambient temperature (Tma = +122 °F, +50 °C)
specified by Extron.
2.
3.
4.
Reduced air flow — Install the equipment in a rack so that
the amount of air flow required for safe operation of the
equipment is not compromised.
Mechanical loading — Mount the equipment in the rack
so that a hazardous condition is not achieved due to
uneven mechanical loading.
Circuit overloading — Connect the equipment to the
supply circuit and consider the effect that circuit
overloading might have on overcurrent protection and
supply wiring. Appropriate consideration of equipment
nameplate ratings should be used when addressing this
concern.
5.
Reliable earthing (grounding) — Maintain reliable
grounding of rack-mounted equipment. Pay particular
attention to supply connections other than direct
connections to the branch circuit (e.g. use of power strips).
2
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Rack installation
The MIX 301 can be rack mounted using either the RSF 123
VersaTools 19" 1U rack shelf (Extron part #60-190-20), the RSB 123
basic VersaTools rack shelf (Extron part #60-604-20), an RSU 129
standard universal 1U rack shelf (Extron part #60-190-01), or an
RSB 129 1U basic rack shelf (Extron part #60-604-01). Figure 1
shows the VersaTools rack shelf, and figure 2 shows a standard
rack shelf. On the standard rack shelf, there are eight mounting
locations at the front of the shelf or eight at the rear of the shelf.
1.
Remove the rubber feet from the unit, if previously
installed.
2.
Mount the unit on the rack shelf, using two 4-40 x 3/16"
screws. These screws go into holes on the underside of the
unit near the left-front and right-rear corners.
Only products in the VersaTools line can be mounted on
a VersaTools rack shelf.
3.
Install blank panels (included with Extron part #60-190-xx,
optional with Extron part #60-604-xx) or other units on the
rack shelf.
VersaTools
Rack Shelf
DISTRIB
U
TION AMPLIFIER
Quarter Rack Width
False Front Face Plate
Eighth Rack Width
False Front Face Plate
(2) 4-40 x 3/16"
Screws
Figure 1 — Mounting the MIX 301 on a VersaTools
rackshelf
3
MIX 301 • Installation and Operation
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Installation and Operation, cont’d
DI
S
TRIB
UT
ION AMPLIFIER
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Figure 2 — Mounting the MIX 301 on a standard
1U rack shelf
Back of the rack installation
The MIX 301 can be conveniently mounted on the rear of a rack
by using the Extron MBB 100 back of the rack mounting kit
(Extron part #70-367-01). The back of the rack mounting kit
allows the MIX 301 to be vertically positioned.
1.
Attach the two back of the rack mounting brackets to the
sides of the MIX using the four included mounting screws.
IP
A
T
IP
A
IP
A
T
IP
A
2.
Mount the unit on the rack using the two included rack
screws. The MIX 301 can be vertically mounted facing in
either direction, as shown in the following diagram.
4
MIX 301 • Installation and Operation
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0
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Furniture/Projector mounting
Use the optional MBU 123 mounting kit (furniture,
part #70-212-01, or the PMK 100 projector pole mount kit, part
#70-217-01) to mount the MIX 301, as follows.
Furniture mounting
1.
2.
Remove the rubber feet if they were previously installed.
Attach the mounting
bracket to the MIX 301,
as shown here.
a.
Remove the two
machine screws
from one side of
the unit. Save
these screws for
future use.
b.
c.
After lining up a
bracket with the
holes, attach the
bracket using the
L
R
longer machine screws provided.
Repeat this step to attach the other bracket.
3.
Attach the MIX 301 to the furniture.
5
MIX 301 • Installation and Operation
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Installation and Operation, cont’d
a.
b.
c.
Hold the unit against the underside of the table or
other furniture, and mark the locations for four screws
(two screws per bracket) on the mounting surface.
At each mark, drill a 3/32" (2 mm) diameter pilot hole
approximately 1/4" (6 mm) deep in the mounting
surface.
Insert #8 wood screws into the four pilot holes.
Tighten each screw into the mounting surface until just
less than 1/4" (6 mm) of the screw protrudes.
d.
e.
Align the bracket slots with the wood screws and place
the unit against the mounting surface.
Slide the unit either forward or backward until the
screws are in contact with the edge of the bracket slots.
Then, tighten each screw to secure the unit in place.
Projector mounting
1.
2.
Remove the rubber feet if they were previously installed.
Attach the mounting bracket to the MIX 301 with the
machine screws provided.
Projector
Mounting
Bracket
3.
Secure the unit to a
projector mount or other
surface using mounting
bolts as shown in the
Mounting
Bolt
following diagram.
L
BA
S
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A
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R
2
UNB
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ON
S
1
A
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A/LUNB
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TER
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A
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AL/UNB
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B
B
C
WER
MXA
PO
1V2
02.A
Digital Projector
MIX 301 • Installation and Operation
6
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Rear Panel Features and Cabling
3
5
IN 1
IN 3
MIX 301
3 CHANNEL
MIXER
IN 2 MIX OUT
1
12V
0.5a MAX
4
6
2
Figure 3 — MIX 301 rear panel
Captive screw power input connector — Connect the included
12 VDC external power supply into the 2-pole 3.5 mm captive
screw connector. Be careful to observe the correct polarity.
1
Smooth
Ridges
3
5
A
A
Tie Wrap
SECTION A–A
Captive Screw
Connector
Power Supply
Output Cord
When connecting the power supply, voltage
polarity is extremely important. Applying power
with incorrect voltage polarity could damage the
power supply and the MIX 301. Identify the power
cord negative (ground) lead by the ridges on the
side of the cord or a black heat shrink wrapping
around it.
CAUTION
The two power cord wires must be kept separate
while the power supply is plugged in. Remove
power before wiring.
To verify the polarity before connection, check the no load
power supply output with a voltmeter.
Your MIX 301 may have shipped with a blue captive
screw connector. This blue connector can be plugged
into either a blue or an orange power receptacle.
The ideal length of exposed (stripped) copper wire
for the blue connector is 3/16" (5 mm).
MIX 301 • Installation and Operation
7
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Installation and Operation, cont’d
The blue connector does not have the extended tail or the
included tie-wrap.
Do not tin the power supply leads before installing in the
direct insertion connector. Tinned wires are not as
secure in the connectors and could be pulled out.
After making any adjustments to the MIX 301, either
via the front panel controls, SIS commands, or the
Extron Audio Products Control Program, wait at least
10 seconds after making those changes before
disconnecting power to the MIX 301. Failure to
observe the 10-second timeout may result in those
adjustments not being saved.
Power LED — Lights green to indicate that the MIX 301 has
2
power.
Balanced/unbalanced input connectors (IN 1, IN 2, IN 3) —
3
4
5
The balanced/unbalanced mono audio input is wired to a
3-pole, 3.5 mm captive screw connector. Wire the connector as
shown below.
Do not tin the connector leads before installing them in
the connector. Tinned wires are not as secure in the
connectors and could be pulled out. For further wiring
details, see the included “Cable Preparation For
Audio Connections” card.
Tip
Sleeve
Tip
Ring
Sleeve
Left or Right
Unbalanced Input
Balanced Input
Balanced output connector (MIX OUT) — The balanced mono
output is wired to a 3-pole, 3.5 mm captive screw connector.
Wire the connector as shown below for balanced or unbalanced
output devices.
6
MIX 301 • Installation and Operation
8
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Do not tin the connector leads before installing them in
the connector. Tinned wires are not as secure in the
connectors and could be pulled out. For further wiring
details, see the included “Cable Preparation For Audio
Connections” card.
CAUTION
For unbalanced audio, connect the sleeve(s)
to the ground. DO NOT connect the sleeve to
the negative (-) contact.
Tip
Tip
Ring
Sleeve
NO GROUND HERE
Sleeve
Unbalanced Output
Balanced Output
MIX 301 • Installation and Operation
9
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Installation and Operation, cont’d
Front Panel Features
1
2
3
MTP SERIES
1
2
3
4
Figure 4 — MIX 301 front panel
Power LED — Lights green to indicate that the MIX 301
has power.
1
4
Input channel audio gain controls — Adjusts the audio
2
3
input gain for each input. The gain is adjusted by rotating
the screw and the adjustment range is from mute (fully
counterclockwise) to +20 dB (fully clockwise). See the note
below.
Unity gain (0 dB) for each input channel is around the
12 o’clock (vertical) position with the potentiometer
adjustment screws vertically aligned with the indicator
dots, as shown here:
1
2
3
The potentiometers of the MIX 301 are set precisely to
unity gain at the factory. Once an adjustment screw is
turned, test equipment will be required to accurately
reset the potentiometer to unity gain.
MIX 301 • Installation and Operation
10
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Reference Information
Specifications
Audio
Gain ................................................ Adjustable per input. When all three gain
potentiometers are set to 12 o’clock, the
gain is as follows:
Unbalanced output: -6 dB
Balanced output: 0 dB
Frequency response .................... 20 Hz to 20 kHz, 0.05 dB
THD + Noise ................................. 0.05% @ 1 kHz at nominal level
S/N ................................................ >90 dB, balanced, at maximum output
(unweighted)
CMRR ............................................ >70 dB @ 60 Hz to 20 kHz
Audio input
Number/signal type ................... 3 mono, balanced/unbalanced
Connectors ................................... (3) 3.5 mm captive screw connectors,
3 pole
Impedance .................................... >18k ohms unbalanced/balanced,
DC coupled
Nominal level ............................... -10 dBV (316 mVrms) or +4 dBu
(1.23 Vrms)
Maximum level ............................ >+18 dBV, (balanced or unbalanced) at 1%
THD+N
Input gain adjustment ................. Mute to +20 dB, adjustable per input
0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu
Audio output
Number/signal type ................... 1 mono, balanced/unbalanced
Connectors ................................... (1) 3.5 mm captive screw connector, 3 pole
Impedance .................................... 50 ohms unbalanced, 100 ohms balanced
Nominal level ............................... -10 dBV (316 mVrms) unbalanced, or
+4 dBu (1.23 Vrms) balanced, adjustable
Maximum level ............................ +25 dBu, balanced with 100k ohm load at
1% THD+N
+18 dBm balanced with 600 ohm load at
1% THD+N
General
External power supply ................ 100 VAC to 240 VAC, 50/60 Hz, external,
autoswitchable; to 12 VDC, 1 A, regulated
Power input requirements ......... 12 VDC, 0.2 A (max.)
MIX 301 • Reference Information
11
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Reference Information, cont’d
Temperature/humidity .............. Storage: -40 to +158 °F (-40 to +70 °C) /
10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) /
10% to 90%, noncondensing
Rack mount .................................. Yes, with optional 1U rack shelf, part
#60-190-01 or 60-604-01; or VersaTools®
rack shelf, part #60-190-20 or 60-604-20; or
the Back of the Rack Mounting Kit
#70-367-01.
Also furniture mountable with Under-
desk Mounting Kit, part #70-212-01, or
attachable to a projector mount with
optional mounting kit #70-217-01.
Enclosure type .............................. Metal
Enclosure dimensions ................. 1.7" H x 2.2" W x 3.0" D (1U high, one-
eighth rack wide)
4.3 cm H x 5.6 cm W x 7.6 cm D
(Depth excludes connectors.)
Product weight ............................. 0.2 lbs (0.1 kg)
Shipping weight ........................... 2 lbs (2 kg)
Vibration ....................................... ISTA 1A in carton (International Safe
TransitAssociation)
Listings .......................................... UL, CUL
Compliances ................................. CE, FCC Class A, VCCI, AS/NZS, ICES
MTBF ............................................. 30,000 hours
Warranty ....................................... 3 years parts and labor
All nominal levels are at 10%.
Specificationsaresubjecttochangewithoutnotice.
MIX 301 • Reference Information
12
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Parts List
Included parts
Included
parts
Part number
to reorder
MIX 301
60-737-01
70-055-01
Power supply: universal 12 VDC, 1.0 A
3.5 mm captive screw connectors, 3-pole (x4) 10-319-13
3.5 mm captive screw connector, 2-pole
Tweeker (small screwdriver)
Rubber feet (unattached)
User’s manual
Optional Accessories
Accessories
Part numbers
MBB 100 back of the rack mounting kit
RSF 123 1U 19" VersaTools rack shelf kit
RSB 123 Basic VersaTools rack shelf
RSU 129 1U 19" rack shelf kit
70-367-01
60-190-20
60-604-20
60-190-01
60-604-01
70-212-01
70-217-01
RSB 129 1U basic rack shelf kit
MBU 123 Under desk mounting kit
PMK 100 Projector pole mounting kit
13
MIX 301 • Reference Information
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