Rolls MX310 User Manual
MX310 Mormic
- Mixes three microphones to one XLR output
-
Output level controls and a mic/line-level output switch
- Phantom Power and Low-Cut switches for each Mic input
MX310
3-Channel mono Mic Mixer
The MX310 is a very useful microphone mixer. It's perfect for sub-mixing
microphones in an installation or recording application. The Phantom
Power and Low-Cut switches add to the versatility and usefulness of the
MX310.
OUTPUT
OUTPUT LEVEL
MIC
LINE
MADE IN USA
www.rolls.com
MorMics
Three Channel Microphone Mixer
CH 1
LEVEL LEVEL
SPECIFICATIONS
Input Impedance: 600 Ohms
Output Impedance: 600 Ohms Mic - 200 Ohms line
THD + Noise: .05% Typical
Frequency Response: 20 Hz - 20 kHz (+0 / -3 dB)
Voltage Gain: 50 dB line/10 dB Mic
Low Cut: -3 dB @ 100 Hz
Current Draw: 20 mA
Phantom Power: +12 VDC
Connectors: 3 Female XLR, 1 Male XLR, 1 1/8" TRS,
DC Power Jack
Maximum Supply Voltage: 16 VDC
Size: 5.25" x 3.75" x 1.5"
Weight: 1 lbs.
CH 2
CH 3
LEVEL
CH 3
1/8”
INPUT
MX310
clip
PHONES
pwr
AUX
+
-
Rolls Corporation
75889 03100
63
Salt Lake City, UT
03/10
Quick Start Guide
INTRODUCTION
Thank you for your purchase of the MX310. This unit is designed and
manufactured to mix three microphones together and send their combined signals out to a single transformer-balanced XLR output. The individually switchable phantom power and low-cut switches provide the fi nal
touches which make the MX310 a valuable tool for any sound reinforcement, musical, recording, or install application.
INSPECTION
1. Unpack and Inspect the MX310 package.
Your MX310 was carefully packed at the factory in a protective carton.
Nonetheless, be sure to examine the unit and the carton for any signs
of damage that may have occurred during shipping. If obvious physical
damage is noticed, contact the carrier immediately to make a damage
claim. We suggest saving the shipping carton and packing materials for
safely transporting the unit in the future.
2. For warranty registration go to our website: WWW.ROLLS.COM
DESCRIPTION
REAR PANEL
Mic Input: 1 - 3: XLR balanced inputs for connection to any standard
dynamic or condenser microphone.
Output: Transformer balanced XLR output jack for connection to the next
device in the signal chain such as a mixer, signal processor or amplifi er.
MIC/LINE Switch: This switch adjusts the output XLR level from Mic or
Line level. This switch does not effect the Aux/Headphone Output.
FRONT PANEL
Mic Level 1 - 3: These controls adjust the level of the corresponding Mic
channel. The level varies from -infi nity (off) to +60 dB of gain (typical).
Phone/Aux: 1/8" TRS jack which may be connected to a pair of headphones for personal monitoring, or to an unbalanced input of a signal
processor or amplifi er.
Power LED: Indicates the MX310 is on.
Clip LED: Indicates that clipping is about to occur or occurring in the
MX310 circuitry. This LED begins to light 3dB below actual circuit clipping.
Located on the right side of the unit is the +12 VDC power jack for
connection to the Rolls PS27 +12 VDC (outside of the ring is positive)
external power supply.
1 2 3
PHNT PWR ON=DOWN
LOW CUT ON=UP
P L P L P L
On the left side are the Phantom Power and LowCut switches.
As shown here, under each number is a P indicating Phantom Power, and an L which indicates
Low-Cut.
When the P switch is DOWN, the phantom power is ON, when it is UP,
the phantom power is OFF.When the L switch is UP, the low-cut is ON,
when it is DOWN, the low-cut is OFF.
SCHEMATIC
1
Rev:
Murray, Utah 84107
3
U1A
801-263-9053
MX310 MORMICS 3 CH MIC MIXER
Title
C20
22K
R28
4
+VB
LDRG
1
Sheet of
MX310.SCH 41310
22 April 2010
FXa
Date:
Size: Document Number:
47U
J6
XLR M PC
OUT
DPDT
LOW
503
R6
10U
10U
XLR F PC
1 2
J1
CR1
20K 1%
SW2A
Output Level
HI
123
C21
27PF
1N4148
C4
470PF
VPHAN
U1C
SW DIP-6
R32
330
R33
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C19
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4 9
4560
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470PF
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+VB
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R10 332 1%
R11 332 1%
C6
10U
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3 10
R9
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J5
JK3.5ST
LINE/HDPHONE
R7
10K
+VB
P1
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SW1B
C5
7
SW DIP-6
2 11
4560
U2B
8
+V
C3
470PF
5
R2
R1
R5
20K 1%
C26
10U
C1
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R3 332 1%
6
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C25
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CH 1
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VPHAN
U1A
SW DIP-6
1 12
1 2
R19
330
+V
P100K
SW1F
8
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20K 1%
C11
10U
C29
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4.99K 1%
IN 9-15 VDC
JAPDC
J4
231
C23
503
C17
1K UF
D1
1N4001
Q2
VPHAN
+V
C22
47U
Q1
D3
2K
R24
LDRG
CLIP
R25
33K
R21
10K
+VB
CR3
C15
503
SW DIP-6
7
6 7
4560
R20
20K 1%
U1B
R17 332 1%
6
R18 332 1%
3
C30
10U
10U
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J3
C14
C24
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R36 10K
1 2
J7
5
10U
CH3
2N3904
R26
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JK3.5ST
R29
10K
5968 S 350 W
Rolls Corporation
18K
+VB
2
4560
1
D2
R27
3.3K
+V
R37 10K
AUX IN
6
5
SW2B
3
4
DPDT
R31
4.7K
100
R22
C18
47U
1
R23
10K
27PF
R35
47U
4556
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C10
2
C7
C28
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CH 2
10K
503
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4
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CR4
CR2
20K 1%
C9
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4
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2
3
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R42
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5 8
R16
R15
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