Rolls MP222 User manual

MP222
Rolls
Brand
Rolls
Model
MP222
Category
Supplementary music equipment
Type
User manual

Rolls MP222 is a two-channel microphone preamp designed for studio applications. It features transformer-balanced mic inputs, variable level control, phase and low-cut filters, and phantom power. The MP222 can be used to connect microphones to a computer or other stereo inputs via its 1/8" (3.5mm) stereo output.

Rolls MP222 is a two-channel microphone preamp designed for studio applications. It features transformer-balanced mic inputs, variable level control, phase and low-cut filters, and phantom power. The MP222 can be used to connect microphones to a computer or other stereo inputs via its 1/8" (3.5mm) stereo output.

MP222 Studio Pro Preamp
ROLLS CORPORATION
SALT LAKE CITY, UTAH
10/11
CH 4
CH 1
CH 2
CH 3CH 4
LEVEL
LEVEL
LEVEL
LEVEL
PS12
CLASS AMP
5 + 5 WATT MIX/AMP
LEFT
RIGHT
MA251
3.5mm
STEREO
+
+
-
-
BOTH OUTPUTS MUST BE USED
PHANTOM
CH 1
INPUT
CH 2
INPUT
CH 3
INPUT
POWER
LINE
OUT
ON - OFF
CH 2
MONO
INPUT
MUTE
R
R
R
L
L
L
0 10
15 VDC
+
-
Studio Pro Preamp
Two Channel Microphone Preamp
MADE IN USA
CHANNEL 2
CHANNEL 1
www.rolls.com
PAD
PHASE
LOW
CUT
CHANNEL 2
INPUT INPUT
MP222
INPUT
OUTPUT INPUT
OUTPUT
MIC/
LINE
MIC/
LINE
MP222
PAD
LEVEL
PHASE
LOW
CUT
CHANNEL 1
0 1800 180
CHANNEL 2
CHANNEL 1
-30 dB
80Hz 80Hz
+48V +48V
CH1-TIP
CH2-RING
0 10
LEVEL
DUAL
OUTPUT
-30 dB
pwr
QUICK START
OPERATION GUIDE
For warranty registration please visit the rolls web site at www.rolls.com.
INTRODUCTION
Thank you for purchasing the new MP222 Studio Pro Preamp - two channel
microphone preamp. Although having many possible uses, this microphone
preamp was designed for studio applications. It has a transformer balanced mic
input section, and many variable options for getting your mic to sound just as you
want it to when recording. It is great if you are just looking for studio quality mic
processing, or any application where a high quality mic preamp is needed.
Please review this manual carefully as it contains important information regarding
the proper use of this product.
INSPECTION
1. Unpack and Inspect the MP222 package.
Your MP222 was carefully packed at the factory in a protective carton. None-
theless, 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. Please visit our web site at www.rolls.com, click on the Register Your Warranty
Here text and follow the instructions to register your MP222.
Disclaimer:
This Quick start guide assumes that the user has a basic knowledge of audio
connections. It also assumes that the user has had some experience with record-
ing or high-end preamps.
Training and operation is the dealers responsibility. At Rolls we do not sell directly
to customers. We have factory authorized dealers and it is the dealers respon-
sibility to gather your equipment list and recommend proper products to the
consumer. Do not call the Rolls factory and expect help with your setup. We rely
on our dealers to do such work. There is only so much that can be done over the
phone so PLEASE CONTACT YOUR LOCAL DEALER WITH QUESTIONS. If
you have purchased you item online or used, you are on your own. WE HIGHLY
RECOMMEND THAT IF YOU ARE NOT FAMILIAR WITH SUCH PRODUCTS TO
PLEASE BUY THEM FROM A REPUTABLE FACTORY AUTHORIZED DEALER
THAT OFFERS CUSTOMER SUPPORT..
1
SPECIFICATIONS
Input Impedance: mic - 600 Ohms or greater XLR
Output Impedance: 50 Ohms
THD + Noise: .02%
S/N Ratio: 110 dB
Frequency Response: 20 Hz - 30 kHz (+0 / -1 dB)
Max Output Level: +14 dB
Max Input Level: +20 dB
Max Gain: +70 dB
Current Draw: 30 mA
Phantom Power: +48 VDC
Input Connectors: 4 Female XLR
DC Power Jack: (5.5 X 2.1 mm tip negative)
Output connectors: 1/8” (3.5mm) stereo out. 2 Male XLR
Size: 6.75”w x 5.125”d x 1.75” h
Weight: 1.75 lbs.
6
DESCRIPTION
FRONT PANEL
0 10
Studio Pro Preamp
Two Channel Microphone Preamp
MADE IN USA
www.rolls.com
PAD
PHASE
LOW
CUT
CHANNEL 2
INPUT INPUT
MP222
PAD
LEVEL
PHASE
LOW
CUT
CHANNEL 1
0 1800 180
CHANNEL 2
CHANNEL 1
-30 dB
80Hz 80Hz
+48V +48V
0 10
LEVEL
-30 dB
pwr
FRONT PANEL DESCRIPTION
Note: Channel One descriptions are identical to Channel Two
INPUT:
Standard XLR type balanced input, pin 2 is hot, for Microphones.
-30 dB Pad:
This switch changes the level of the input. When in, it attenuates the input level
down by -30 dB.
PHANTOM POWER +48V:
Turns on the internal 48 volt power supply when using phantom powered micro-
phones. It should be turned off when not in use. The Phantom Power switch is a
great way to turn off or mute a condenser mic. If you are recording and want to
turn your mic off this is the best way to mute it for either short or long periods of
time.
LEVEL:
Sets the output level as desired, for best signal to noise ratio it should be
set in the middle to start.
PHASE:
This is a variable setting from 0 or “in phase” to 180 degrees out of phase and
everything in between by adjusting the level of the knob.
LOW CUT:
This is a high pass fi lter that when depressed cuts the low end of the signal at
80Hz.
1
Rolls Corporation
5968 S 350 W
Murray, Utah 84107
1
MP222.SCH A
5 May 2011
Title
Size: Document Number:
Date:
Rev:
Sheet of
MP222 DUAL MIC PREAMP
FXa
+V
R7
47K
P1
W100K
R8
10K
R11
22K
R10
220K
C3
27PF
P2
P100K
C9
503
R15
22K
C7
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R16 22K
C8
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2
3
1
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U2A
4560
+V
R13
22K
6
5
7
8
U1B
4560
15V REG
CH 2 (L)
VPHAN
R2
6.8K
R1
6.8K
1 2
3
J2
XLR F PC
C4
47U
+V
801-263-9053
PHASE
GAIN
HI
+V
+V
R22
10K
C13
27PF
R4 1K
R9
4.7K
R3
1K
6
5
7
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U2B
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OUT
1 2
3
J3XLR M PC
C12
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R19
22K
R18
10K
LOW
C11
27PF
R26
4.7K
R23
4.7K
R20
10K
VPHAN
R24
330
R27
330
1
2
3
SW7A
DPDT
4
5
6
SW7B
DPDT
R21
100
R25
100
C14
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4
5
6
SW2B
DPDT
1
2
3
SW3A
DPDT
Input Pad
PS27S ONLY
80hZ Low Cut
1
2
3
SW1A
DPDT
4
5
6
SW1B
DPDT
CH 1 (R)
1 2
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J1
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R55
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CH 1
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R29
6.8K
R28
6.8K
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J4
XLR F PC
PHASE
HI
+V
R47
10K
C27
27PF
R31 1K
R34
220K
R30
10K
OUT
1 2
3
J6XLR M PC
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6
5
7
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SW8B
DPDT
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4
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DPDT
Input Pad
80hZ Low Cut
1
2
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SW4A
DPDT
4
5
6
SW4B
DPDT
1 2
3
J5
XLR F PC
R42
1K
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1
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SW5A
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+V
1
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DPDT
D2
LDGR
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LDGR
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VB
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1
1
3
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2
2
4
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T1
P/N 827
1
1
3
3
2
2
4
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T2
P/N 827
L2
long board trace
J7
JK3.5ST
+V
+V
SCHEMATIC
2
5
3 4
REAR PANEL
CH 4
CH 1
CH 2
CH 3CH 4
LEVEL
LEVEL
LEVEL
LEVEL
PS12
CLASS AMP
5 + 5 WATT MIX/AMP
LEFT
RIGHT
MA251
3.5mm
STEREO
+
+
-
-
BOTH OUTPUTS MUST BE USED
PHANTOM
CH 1
INPUT
CH 2
INPUT
CH 3
INPUT
POWER
LINE
OUT
ON - OFF
CH 2
MONO
INPUT
MUTE
R
R
R
L
L
L
15 VDC
+
-
CHANNEL 2
CHANNEL 1
INPUT
OUTPUT INPUT
OUTPUT
MIC/
LINE
MIC/
LINE
MP222
CH1-TIP
CH2-RING
DUAL
OUTPUT
INPUTS: 1 - 2: XLR balanced inputs for connection to any standard dynamic or
condenser microphone. The input circuitry has a very wide input range and can
accommodate almost any (mic to line) level signal if you select the proper setting
for the Mic/Line switch.
OUTPUTS: 1 - 2: XLR balanced outputs. The output circuitry has a very wide
range and can accommodate most mic XLR inputs. If you select the proper set-
ting for the -30 dB switch on the front of the MP222.
MIC/LINE SWITCH: This is for setting up the output XLR’s for either Mic or Line
level. The mic/line switch will effect the XLR and DUAL OUTPUT levels.
IN=LINE OUT=MIC
DUAL OUTPUT: Tip-Ring-Sleeve stereo 1/8” (3.5mm) jack for connection to a
computer or other stereo type inputs. The tip of the jack is connected to channel
1 and the ring is connected to channel 2. This will make channel 1 effectively the
left output and channel 2 the right output going into a stereo application.
15 VDC JACK: For connection to the Rolls PS27s 15VDC power supply.
CONNECTION - OPERATION
Connect microphones to the MP222 via balanced XLR cables.
Make sure that you are using the proper Mic/Line switch setting. If the output
level of the MP222 seems very low or very loud it might be that you are using
the wrong mic/line switch setting. If you are using a Mic output level the mic/line
switch on the back of the MP222 is set to the Mic setting, and if you are using a
Line level output signal that the switch is in the line setting. The mic/line switch
will effect the XLR and DUAL OUTPUT levels.
IN=LINE OUT=MIC
Make sure that the input PAD switch is in the proper setting. Start with the PAD
switch in the outward position (OFF) for most Microphone applications, and
adjust it as needed. See “FRONT PANEL” section of this manual for more info
on the PAD switch. Improper PAD switch setting will make the unit seem very low
in overall volume (-30 dB to be exact). Make sure if you are using a Mic that the
PAD switch on the front of the MP222 is set to the outward position (OFF), and
if you are using a Line level input signal that the switch is in the inward -30 dB
setting (ON).
If you are using the DUAL OUTPUT connect it to the Input of your recording
device that also uses a stereo 1/8” (3.5mm) Tip-Ring-Sleeve plug. Follow the silk
screening on the back of the of the unit. The tip is connected to channel 1 and
the ring is connected to channel 2. This will make channel 1 effectively the left
output and channel 2 the right output going into a stereo application.
Connect the Rolls PS27s power supply. Once your MP222 is properly connected,
the pwr LED on the front panel will light.
If you are using condenser type microphones, apply the phantom power to the
desired channels. Test the microphone levels by speaking into the microphones
at a normal operating volume, and adjust the Mic Level controls until you achieve
desired levels. Adjust each control to the desired setting.
Adjust the PHASE and LOW CUT as desired. These can be set to any level/com-
bination that is desired in both mic or line level. Just do what sounds best to you.
For best results, we recommend recording a couple of test runs to ensure you
have proper levels set.
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Rolls MP222 User manual

MP222
Rolls
Brand
Rolls
Model
MP222
Category
Supplementary music equipment
Type
User manual

Rolls MP222 is a two-channel microphone preamp designed for studio applications. It features transformer-balanced mic inputs, variable level control, phase and low-cut filters, and phantom power. The MP222 can be used to connect microphones to a computer or other stereo inputs via its 1/8" (3.5mm) stereo output.

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