Rolls RDB104 User Manual

LIMITED WARRANTY

This product is warranted to the original consumer purchaser to be free from
defects in materials and workmanship under normal installation, 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 returned to Rolls Corporation, TRANSPORTATION CHARGES PRE­PAID. 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.

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 MER­CHANT ABILITY 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.

RDB104

Quad Active Direct Box

CHANNEL ONE

-00 0

INPUT

CHANNEL FOUR

LEVEL

QUAD

INPUT

-00 0

LEVEL

POWER

ACTIVE
DIRECT BOX

SPECIFICATIONS

Input Impedance: 100 kΩ
Output Impedance: 100 Ω balanced

Max. Output Level: +22 dB (Pad out)
Gain: -

oo

to 0 dB

Dimensions 1.75" X 6" X 19"

(89mm X 162mm X 482mm)
Weight 6 lbs. (2.72 Kg)
Power 120VAC (230VAC) 15VA

CHANNEL TWO CHANNEL THREE

-00 0

INPUT

LEVEL

RDB104

INPUT

-00 0

LEVEL

ROLLS CORPORATION

SAL T LAKE CITY, UTAH

8/00

OWNERS MANUAL

INTRODUCTION

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

DESCRIPTION

Thank you for your purchase of the R OLLS RDB104 Quad Active Direct Box. The
RDB104 is an active impedance matching device with the added benefit of a
variable lev el control. Its four channel design is ideal for a variety of applications
including musicians, studios, and sound contractors. It is designed and manufac­tured carefully to provide years of long-lasting service. Please read the f ollo wing
manual carefully to ensure proper operation, and enjoy your ne w RDB104.

INSPECTION

1. Unpac k and inspect the RDB104 bo x and pac kage .
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

Rev:

Sheet: 1 of 1

G R O U N D L IF T

312

S W 2

S P S T

J 3

X L R J A C K M

1 2

3

S W 1 A

D P D T

3 0 D b P A D

123

4 7

R 7

1 K

R 5

7

1 0 K

R 4

4 5 6 0

8

+V

6

1

4 5 6 0

R 9

1 K

2

R 8

1 0 0 K

A T T E N U A T O R

S W 3 A

3 0 D b P A D

1 K

R 6

1 K

R 2 5

U 1 B

5

R 3

1 0 K

4

-V

U 1 A

3

R 2 8 R 2 9

P 1

P 1 0 0 K

R 1

1 0 K

G R O U N D L IF T

312

S W 4

S P S T

J 6

X L R J A C K M

1 2

3

D P D T

123

4 7

R 2 7

7

R 2 4

1 0 K

4 5 6 0

8

+V

6

1

4 5 6 0

1 K

2

1 0 0 K

A T T E N U A T O R

S W 5 A

3 0 D b P A D

1 K

1 K

R 2 6

R 3 5

5

R 3 9

4

-V

U 2 A

3

R 3 8

P 2

P 1 0 0 K

R 2 1

1 0 K

G R O U N D L IF T

312

S W 6

S P S T

J 9

X L R J A C K M

1 2

3

D P D T

123

4 7

R 3 7

7

R 3 4

1 0 K

4 5 6 0

8

+V

6

1

4 5 6 0

1 K

2

1 0 0 K

A T T E N U A T O R

S W 7 A

3 0 D b P A D

1 K

1 K

R 3 6

R 4 5

U 3 B

5

R 3 3

1 0 K

4

-V

U 3 A

3

R 4 8 R 4 9

P 3

P 1 0 0 K

R 3 1

1 0 K

G R O U N D L IF T

312

ROLLS CORPORATION

5968 South 350 West

Salt Lake City, UT 84107

S W 8

S P S T

J 1 2

X L R J A C K M

1 2

3

D P D T

123

4 7

R 4 7

1 K

R 4 6

+V

7

R 4 4

1 0 K

4 5 6 0

8

+V

U 4 B

6

R 4 3

1

4 5 6 0

1 K

U 4 A

2

1 0 0 K

R 4 1

A T T E N U A T O R

7 8 1 2

C 1 9

5 0 3

C 1 7

5 0 3

5

1 0 K

D 1 3

1 N 4 0 0 1

4

-V

3

P 4

P 1 0 0 K

1 0 K

P O W E R

L D S G

D 1 2

C 1 5 0 3

C 2 4

1 U

3

O

G

1

2

U 5

I

C 2 2

1

1 0 0 0 U F 1 6 V

1 0 0 0 U F 1 6 V

D 1 4

D 1 5

1 N 4 0 0 1

1 N 4 0 0 1

RDB104.SCH
Ba

TITLE: RDB104 QUAD DIRECT BOX

Size Document Number:

Date: 17-Aug-2000

R 1 2

4 .7 K

-V

C 2 5

4 7 U

3

O

G

U 6

7 9 1 2

I

C 2 3

2

C 2 0

5 0 3

C 2 1

5 0 3

D 1 6

1 N 4 0 0 1

T 1

M C I 4 0 7 4 0 2 4

FRONT PANEL

NOTE: CHANNEL ONE THROUGH FOUR DESCRIPTIONS ARE IDENTICAL.

INPUT: 1/4” unbalanced jac k f or 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 A C outlet and power is
applied.
POWER SWITCH: Applies pow er to the RDB104 when connected to an A C outlet.

CHANNEL ONE

INPUT

-00 0

LEVEL

CHANNEL TWO CHANNEL THREE

-00 0

LEVEL

INPUT

INPUT

-00 0 -00 0

CHANNEL FOUR

INPUT

QUAD

POWER

ACTIVE

LEVELLEVEL

DIRECT BOX

RDB104

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 jac k containing the output signal. Pin 2 is “hot”.
30 dB PAD: Pressing this switch in lo wers 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 jac k (parallels the front-panel Input jac k.)

BLOCK DIAGRAM
The diagram shown below represents one channel of the RDB104. All channels
are identical.

INPUT

Output

Buffer

30dB

PAD

OUTPUT

2

SWITCH

LEVEL

GROUND

LIFT

J 1

P H O N E 1 / 4

P H O N E 1 / 4

F R O N T

C H 1

J 2

R E A R

J 4

P H O N E 1 / 4

J 5

P H O N E 1 / 4

F R O N T

C H 2

R E A R

J 7

P H O N E 1 / 4

J 8

P H O N E 1 / 4

F R O N T

C H 3

R E A R

J 1 0

P H O N E 1 / 4

J 1 1

P H O N E 1 / 4

S W 2

S W S P S T

F R O N T

R E A R

C H 4

P L 1

P L U G A C M A L E