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
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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
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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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