Rolls Stereo System MB35 User Guide

Thank you for your purchase of the MB35 ProMatch USB Stereo Dual Con-  
verter. Specically, the MB35 converts consumer level stereo RCA signals  
to balanced XLR professional line level - and back.  
WARRANTY  
For compete information on the Rolls 1 Year Warranty, and to register this  
l e v e l  
. . . a n  
- B r o  
- I n s  
- S t u  
DESCRIPTION  
REAR PANEL  
+4 dB IN LEFT and RIGHT XLR jacks: Female XLR jacks to be connected  
to the output of a professional line-level device such as a sound reinforce-  
ment mixing board or recording device.  
+4 dB OUT LEFT and RIGHT XLR jacks: Male XLR jacks to be connected  
to the input of a professional line-level device such as a mixer or recording  
device.  
RCA - Line Out: The RCA out can be used with any input on CH2. The most  
common use is to convert a 1/8” Stereo Headphone signal to RCA line level.  
FRONT PANEL  
r o M a t c h M U B  
-10 OUT Stereo RCA jacks: For connection to the input of a consumer level  
device such as a cassette or CD player.  
-10 IN Stereo RCA jacks: For connection to the output of a consumer level  
device such as a cassette or CD player.  
LEVEL 1: Adjusts the signal level of channel one, or the +4 dB IN to -10 dB  
OUT channel.  
h o M a t c M  
LEVEL 2: Adjusts the signal level of channel two, or the -10 dB IN to +4 dB  
OUT channel.  
1/8” Stereo input: For connection to the output of a headphone level such as  
a computers headphone output or mixers headphone output.  
PWR LED: Indicates that power is applied to the MB35.  
12 VDC jack: For connection to the Rolls PS27 12 Volt DC power supply.  
The outside of the jack (barrel) is positive, the inside is negative.  
USB: The USB input is CH1 in XLR’s. The USB output is CH2 out - XLR or  
RCA’s.  
IMPORTANT USB NOTE:  
MB35 PROMATCH USB  
The MB35 converts stereo consumer level signals to  
professional line level signals - and vice versa.  
It may also serve as a balanced inline level control by  
patching the four RCA jacks together.  
- Stereo Direct Box  
When connecting the USB, your computer should recognize the  
connection. We offer no support for using or setting up the USB, or  
interfacing with applications. Please contact your dealer reguarding  
these issues.  
CONSUMER LEVEL VS PROFESSIONAL LEVEL  
- Stereo RCA to stereo XLR  
- Stereo Level control for each channel  
- Works as stereo balanced line level control  
- 1/8” Headphone level to line level adaptor  
The purpose of the MB35 is to connect consumer level equipment  
to professional level equipment. An explanation of these are ad-  
dressed here.  
Consumer level signals typically come from devices such as cam-  
corders, cassette decks, CD or MP3 players, and home video play-  
ers. Professional level signals are associated with devices found  
in recording studios and sound reinforcement systems like mixing  
boards, signal processors, and their associated ampliers.  
SPECIFICATIONS  
Max Out:  
Bal: +18 dB  
Unbal: +12 dB  
Bal: +22 dB  
Max In:  
Unbal: +22 dB  
SCHEMATIC  
Input Impedance:  
RCA : 100k Ohm  
XLR: 10 k Ohm  
1/8” stereo: 10k Ohm  
RCA: 100 Ohm  
XLR: 100 Ohm balanced  
-88 dB  
+4 dB In: -8 dB  
-10 dB In: + 20 dB  
.003%  
+VB  
R4  
10K 1%  
C2  
1U  
+12  
R2  
10.0K 1%  
4560  
U1B  
USB IN RED  
J1  
Output Impedance:  
5
6
C13  
R24  
10K  
7
RCAX4  
J6C  
C1 1U  
3
1U P1A  
P100K X2  
2
4
LEFT OUT  
R1  
10.0K 1%  
100  
XLR  
F
PC  
R3  
10K 1%  
R18  
R13  
47  
+VB  
C8  
47U  
R8  
10K 1%  
Noise Floor:  
Gain:  
+4 INPUTS  
C4  
1U  
-10 OUTS  
R14 10K  
+12  
R7  
2
1
4560  
USB IN BROWN  
J4  
3
2
C14  
10.0K 1%  
R26  
10K  
1
RCAX4  
J6D  
R15  
47  
C9  
47U  
U1A  
C3  
3
J3  
R12  
10K  
1U  
5
5
RCAX2 XLR JACK  
3
M
4560  
P1B  
1U  
XLR  
F
PC  
R6  
10.0K 1%  
RIGHT OUT  
6
5
R25  
100  
J8B  
LINE OUTS  
P100K X2  
7
U2B  
R11  
47K  
THD:  
R5  
10K 1%  
+VB  
J7  
3.5STJK  
BLACK  
USB OUT  
C17  
1U  
P2A  
P100K X2  
Power:  
Weight:  
Size:  
12 VDC adapter (center negative)  
1 lbs. (.45 Kg)  
4.15” x 2.46” x 1.55”  
3
1
C16  
C5  
1U  
R11  
RCAX4  
J6B  
4.7K  
R18  
C11  
47U  
120PF  
2
2
47  
R20  
LEFT IN  
1
4.7K  
U2A  
3
+4 OUTS  
1
C18  
1U  
R10  
47K  
R16  
10K  
4560  
2
+VB  
-10 INPUTS/HDPHN IN  
R9  
47  
R19  
10K  
C12  
47U  
P2B  
P100K X2  
+12  
J2  
1
6
4
XLR JACK  
M
RIGHT IN  
RCAX2  
4560  
C15  
4.7K  
R17  
J6A  
RCAX4  
6
5
1
C6  
1U  
C20  
J8A  
7
U3B  
120PF  
1
R10  
47K  
R28  
4.7K  
WHITE  
USB OUT  
2
4560  
+VB  
U3A  
1U  
3
GREEN  
USB GND  
+12  
BLUE  
MB15b has NO usb function  
USB PWR N/C  
PWR  
D2  
6
5
D1  
1N4001  
R21  
18K  
+VB  
R22  
22K  
LDRR  
75889 00350  
C10  
47U  
+12  
J5  
ROLLS CORPORATION  
2
3
1
14  
-
24 VDC  
5968  
S
350  
W
C19  
.047  
TIP NEG  
BARRELL POS.  
R23  
4.7K  
MURRAY, UT  
84107  
Rolls Corporation  
Salt Lake City, UT  
07/08  
JAPDC  
PROMATCH II MB15b/MB35  
Document Number:  
C7  
1K UF  
Size:  
Date:  
Rev:  
A
Ba  
MB35.SCH  
14 March 2008  
Sheet  
1
of  
1
 

Radio Shack Cassette Player CD 3319 User Guide
RCA Microwave Oven RMW968 User Guide
Renesas Network Card R0E5212BACFK00 User Guide
Roberts Radio Clock Radio CR9932 User Guide
Samsung CRT Television BN68 04792A 02 User Guide
Samsung DVD VCR Combo SV DVD3E User Guide
Samsung Printer SRP 352plusAamp;C User Guide
Samsung Stereo System MAX T35 User Guide
Scientific Atlanta Satellite TV System 4001534 User Guide
Sega Video Game Controller 999 1117 User Guide