Rolls MX310 MorMic User manual

Quick Start Guide
Rolls Corporation
Salt Lake City, UT
12/12
MX310
3-Channel mono Mic Mixer
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
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.
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.
+
-
MADE IN USA
PHONES
AUX
clip
pwr
MorMics
Three Channel Microphone Mixer
MX310
LEVEL LEVEL LEVEL
www.rolls.com
OUTPUT
CH 1 CH 2 CH 3
OUTPUT LEVEL
MIC
LINE
CH 3
1/8”
INPUT
75889 03100
63

INTRODUCTION
Thank you for your purchase of the MX310. This unit is designed and
manufactured to mix three microphones together and send their com-
bined signals out to a single transformer-balanced XLR output. The indi-
vidually switchable phantom power and low-cut switches provide the nal
touches which make the MX310 a valuable tool for any sound reinforce-
ment, 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 amplier.
MIC/LINE Switch: This switch adjusts the output XLR level from Mic or
Line level. This switch does not eect the Aux/Headphone Output.
FRONT PANEL
Mic Level 1 - 3: These controls adjust the level of the corresponding Mic
channel. The level varies from -innity (o) to +60 dB of gain (typical).
Phone/Aux: 1/8" TS (tip,sleve AKA mono) jack which may be connected to a
pair of mono headphones (if you use stereo headphones you will only hear
the left side) for personal monitoring, or to an unbalanced input of a signal
processor or ampli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 clip-
ping.
Located on the right side of the unit is the +12 VDC power jack for connec-
tion to the Rolls PS27 +12 VDC (outside of the ring is positive) external power
supply.
On the left side are the Phantom Power and Low-Cut
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
PHNT PWR ON=DOWN
LOW CUT ON=UP
1 2 3
P L P L P L
1
Rolls Corporation
5968 S 350 W
Murray, Utah 84107
1
MX310.SCH 41310
22 April 2010
Title Size: Document Number:
Date:
Rev:
Sheet of
MX310 MORMICS 3 CH MIC MIXER
FXa
LINE/HDPHONE
IN 9-15 VDC
HI
+VB
+VB
+VB
+V
+V
+V
+V
+V
+VB
+VB
+VB
CLIP 2
3 1
J4
JAPDC
C20
47U
R23 10K C16 27PF
R3 332 1% 211
SW1B
SW DIP-6
P1
P100K
C5 503
R4 332 1%
R5
20K 1%
C3 470PF
R6
20K 1%
C4 470PF
R10 332 1% 4 9
SW1D
SW DIP-6
P2 P100K
C10 503
R11 332 1%
R12
20K 1%
C8 470PF
R13
20K 1%
C9 470PF
R17 332 1% 6 7
SW1F
SW DIP-6
P3
P100K
C15 503
R18 332 1%
R30
20K 1%
C13 470PF
R20
20K 1%
C14 470PF
R28
22K
D1 1N4001
Q1 2N3904
D3
LDRG
CR1 1N4148 CR2
1N4148
CR3
1N4148
D2 LDRG
R27 3.3K
R25
33K
R26
10K R29
18K
R24
2K
5 67
8
U1B 4560
3 21
4
U2A
4560
5 67
8
U2B 4560
2 31
4
U3A
4556
C17 1K UF
Output Level
OUT
+VB
+V
1 2
3J6
XLR M PC
C19 47U
R40 100K
R41
1K
CR4
1N4148
6 57
8
U3B
4556
LOW
C21 27PF
+VB
+VB
+VB
R21 10K
R14 10K
R31 4.7K
R33 4.7K
R35 10K
R7 10K
2 3
1
4
U1A
4560
CH 1 CH 2
CH3
VPHAN VPHAN
R2
4.99K 1%
112
U1A
SW DIP-6
R1
4.99K 1%
1 2
3
J1 XLR F PC
R9
4.99K 1%
310
U1C
SW DIP-6
R8
4.99K 1%
1 2
3
J2 XLR F PC
R16
4.99K 1%
5 8
U1E
SW DIP-6
R15
4.99K 1%
1 2
3
J3 XLR F PC
C26 10U C25 10U
C6 10U C7 10U
C11 10U C30 10U
C12 10U C28 10U
C27
10U
C29 10U
C2
10U
C1 10U
R42 47K
C22
47U
Q2
2N3904
VPHAN
VPHAN
R32 330
R19 330
12 3
SW2A DPDT
45
6
SW2B
DPDT
R34 100
R22
100
C18 47U
R36 10K
R37 10K
C24 1U
AUX IN
J7 JK3.5ST
J5 JK3.5ST
C23 503
801-263-9053