INTRODUCTION
Thank you for your purchase of the ROLLS RDB104 Quad Active Direct Box. The
RDB104 is an active impedance matching device with the added benefit of a
variable level control. Its four channel design is ideal for a variety of applications
including musicians, studios, and sound contractors. It is designed and manufac-
tured carefully to provide years of long-lasting service. Please read the following
manual carefully to ensure proper operation, and enjoy your new RDB104.
INSPECTION
1. Unpack and inspect the RDB104 box and package.
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 complete the Warranty Registration Card and return it to the factory.
SCHEMATIC
DESCRIPTION
FRONT PANEL
NOTE: CHANNEL ONE THROUGH FOUR DESCRIPTIONS ARE IDENTICAL.
INPUT: 1/4” unbalanced jack for connection to an unbalanced, usually line-level,
signal.
LEVEL: Varies the amount of input signal from -infinity (off) to 0 dB.
POWER LED: Indicates the RDB104 is connected toi an AC outlet and power is
applied.
POWER SWITCH: Applies power to the RDB104 when connected to an AC outlet.
LEVEL
LEVEL
LEVEL
LEVEL
-00 0
POWER
INPUT
INPUT
INPUT
INPUT
QUAD
ACTIVE
DIRECT BOX
RDB104
CHANNEL ONE
CHANNEL TWO
CHANNEL THREE
CHANNEL FOUR
-00 0
-00 0
-00 0
REAR PANEL
NOTE: CHANNEL ONE THROUGH FOUR DESCRIPTIONS ARE IDENTICAL.
GND LIFT: Separates pin one of the XLR connector from the circuit ground.
OUTPUT: Balanced XLR jack containing the output signal. Pin 2 is “hot”.
30 dB PAD: Pressing this switch in lowers or “pads” the output signal by 30 dB.
this provides a way to connect the output of the RDB104 to a mic input on a mixer.
INPUT: 1/4” unbalanced jack (parallels the front-panel Input jack.)
CHANNEL FOUR
CHANNEL THREE
CHANNEL TWO
CHANNEL ONE
-30 dB
PAD
OUTPUT
INPUT
GND
LIFT
OUTPUT
INPUT
OUTPUT
INPUT
OUTPUT
INPUT
WARNING:
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
NO USER SERVICABLE PARTS INSIDE.
120 VAC
50/60 Hz 15 VA
MODEL RDB104
MADE IN U.S.A.
SERIAL NUMBER
104-
RISQUE DE CHOC - NE PAS ENLEVER
RISK OF ELECTRIC SHOCK
NRTL /C
-30 dB
PAD
GND
LIFT
GND
LIFT
-30 dB
PAD
GND
LIFT
-30 dB
PAD
BLOCK DIAGRAM
The diagram shown below represents one channel of the RDB104. All channels
are identical.
LEVEL
INPUT
OUTPUT
2
Output
Buffer
30dB
PAD
SWITCH
GROUND
LIFT
ROLLS CORPORATION
5968 South 350 West
Sal
t Lake Ci
ty, UT 84107
RDB104.SCH
Rev:
Sheet: 1 of 1
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3
TITLE: RDB104 QUAD DIRECT BOX
Size
Document Number
:
Date: 17-Aug-2000
