Rolls Stereo Amplifier RP220 User Guide

RP220  
DualTube Mic Preamp  
Channel One  
Ch  
GAIN  
VOLUME  
GAIN  
NORM  
-30dB  
NORM  
-30dB  
+48V  
+48V  
INSTRUMENT  
INPUT  
INSTRUMENT  
INPUT  
dB  
0
+38 dB  
+65  
+38 dB +65  
-
OO  
INPUT  
PAD  
INPUT  
POWER PAD  
PHANTOM  
POWER  
PHANTOM  
Dual Tube Microphone Preamp  
Channel Two  
VOLUME  
PWR  
+65  
dB  
0
-
OO  
RP220  
OWNERS MANUAL  
Bellari is a division of  
ROLLS Corporation  
Salt Lake City, UT  
 
FRONT PANEL DESCRIPTION  
REAR PANEL DESCRIPTION  
Note: Channel One descriptions are identical to Channel Two  
Note: Channel One descriptions are identical to Channel Two  
PHANTOM POWER +48V  
INPUT  
Turns on the internal 48 volt power supply for using phantom powered  
microphones. It should be left off when not in use.  
Standard XLR type balanced inputs, pin 2 is hot, for Mic or line-level  
audio sources. (e.g., instrument, microphone or mixer).  
30 dB Pad  
OUTPUT JACKS  
When pressed in, the rear panel XLR input is attenuated by 30 dB. It  
does not switch the instrument input.  
1/4" phone connectors or balanced XLRs used for connection to your line  
inputs on your load (e.g., DAT, Amp. or mixer).  
INSTRUMENT INPUT  
30 dB Pad  
1/4" input jack for plugging a guitar, electric bass, or other instrument  
direct into the preamp. When this jack is used, the XLR input on the rear  
panel is disconnected.  
This switch changes the level of the Output XLR jack only. When in, it  
attenuates the output level by 30 dB.  
PHASE REVERSE  
GAIN  
When pressed in, reverses the phase of the output signal 180 degrees  
from the input signal.  
Adjusts how much actual gain the preamp has. This is similar to a "trim"  
control on some mixers and is different from volume. With the gain set  
high the input may be distorted. For best signal to noise ratio this control  
should be set as high as possible without distortion, (unless distortion is  
desired).  
SERIAL NUMBER  
MODEL RP220  
220-  
CAUTION  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
CHANNEL  
TWO  
CHANNEL  
ONE  
120 VAC  
50/60 Hz 15 VA  
OUTPUT  
OUTPUT  
INPUT  
INPUT  
NORM NORM  
REV -30dB  
NORM NORM  
WARNING: DO NOT EXPOSE THIS EQUIPMENT TO RAIN  
VOLUME  
OUTPUT  
OUTPUT  
OR MOISTURE.  
REV  
-30dB  
MADE IN U.S.A.  
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT  
NOT REMOVE BACK. NO USER SERVICABLE PARTS INSIDE. REFER  
SERVICING TO QUALIFIED SERVICE PERSONNEL.  
Sets the output level as desired, for best signal to noise ratio it should be  
set in the middle of its range or higher.  
PHASE OUTPUT  
LEVEL  
PHASE OUTPUT  
LEVEL  
RISQUE DE CHOC NE PAS ENLEVER  
-
NRTL /C  
OUTPUT LEVEL METERS  
SPECIFICATIONS  
Each channel of the RP220 has five LED level meters, the last one being  
red indicating overload.  
Frequency Response 20Hz - 40kHz, +/- 3dB Mic/Line  
5Hz - 40kHz inst.  
Input Impedance  
600 ohm balanced XLR  
1M ohm Instrument  
0.1% typical  
THD  
S\N Ratio  
Max Gain  
Indicators  
>107 dB  
48dB Inst or line, 70dB XLR  
2 - LEDs (Phantom Power)  
5 - Level LEDs, 4 green 1 red  
XLR balanced and 1/4"  
3.5" X 6" X 19" (89mm X 162mm X 482mm)  
120VAC (230VAC) 15VA  
Dual Tube Microphone Preamp  
Channel One  
Channel Two  
GAIN  
VOLUME  
GAIN  
VOLUME  
NORM  
-30dB  
NORM  
-30dB  
+48V  
+48V  
INSTRUMENT  
INPUT  
INSTRUMENT  
INPUT  
PWR  
Input/Output jacks  
Dimensions  
Power  
+38 dB  
+65  
-
OO  
dB  
0
+38 dB +65  
-
OO  
dB  
0
RP220  
PHANTOM INPUT  
PAD  
PHANTOM INPUT  
PAD  
POWER  
POWER  
2
3
 
TABLE OF CONTENTS  
Introduction  
LIMITED WARRANTY  
1
This product is warranted to the original consumer purchaser to  
be free from defects in materials and workmanship under normal installa-  
tion, use and service for a period of one (1) year from the date of purchase  
as shown on the purchaser’s receipt.  
The obligation of Rolls Corporation under this warranty shall be  
limited to repair or replacement (at our option), during the warranty  
period of any part which proves defective in material or workmanship  
under normal installation, use and service, provided the product is re-  
turned to Rolls Corporation, TRANSPORTATION CHARGES PRE-  
PAID. Products returned to us or to an authorized Service Center must be  
accompanied by a copy of the purchase receipt. In the absence of such  
purchase receipt, the warranty period shall be one (1) year from the date  
of manufacture.  
Inspection  
Why Tubes?  
Front Panel Description  
Rear Panel Description  
Specifications  
2
3
3
4
Operation  
Microphone Input Example  
Line Input Example  
Instrument Input Example  
Warranty  
5
This warranty shall be invalid if the product is damaged as a  
result of defacement, misuse, abuse, neglect, accident, destruction or  
alteration of the serial number, improper electrical voltages or currents,  
repair, alteration or maintenance by any person or party other than our  
own service facility or an authorized Service Center, or any use violative  
of instructions furnished by us.  
This one-year warranty is in lieu of all expressed warranties,  
obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGA-  
TIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO  
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND  
FITNESS FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN  
DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN  
LIMITED WARRANTY. Some states do not allow limitations on how  
long an implied warranty lasts, so the above limitation may not apply to  
you.  
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL,  
INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF  
THIS OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED,  
WHATSOEVER. Some states do not allow the exclusion or limitation of  
special, incidental or consequential damages so the above limitation or  
exclusion may not apply to you. This warranty gives you specific legal  
rights, and you may also have other rights which vary from state to state.  
5
 

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