Thank you for your purchase of the DB14 AV PRESENTER.
The DB14 is a special purpose direct box for applications
such as connecting a laptop computer to a sound system.
Or where needed, a stereo source signal can be separated,
and individual volume controls used for each track such as a
rehearsing choir to a music track. It has stereo RCA inputs,
a stereo 1/8” (3.5mm), 2 volume controls, RCA and XLR
outputs, and uses no power.
CONNECTION
Shown below is a connection example for the DB14b. The laptop
computer’s stereo output is connected to the 3.5mm stereo input of
the DB14b via a stereo 3.5mm to 3.5mm cable.
NOTE: The Right and Left signal levels are adjusted
individually by the Right and Left Volume controls.
The XLR output is connected to a balanced low impedance input on
a snake or a mixer balanced input.
DESCRIPTION
Right/Left In: RCA and 1/8” input jacks. For connection to a
laptop computer, CD player, DVD player, etc.
R/L Out: RCA jacks for sending the input signals out to a line
level amplification device.
The two stereo RCA outputs may be connected to unbalanced high
impedance stereo, or individual right and left mixer inputs.
Low Z Out: Male XLR jack for sending out a mix of both A
and B signals.
To unbalanced
input
Right/Left Volume: Controls the level of each input signal
independently.
GND-LIFT: Ground/Lift switch for disconnecting the ground
of the XLR jack from the ground of the DB14b.
E
M
U
L
M
O
E
V O L
E
M
U M
L
O
E
V O L
T F E L E F
T
I
R I G H T
b R 4 1 E B T D N B 1 E 4 S b E R P R E H S G E N T E R
V A A V
I N
H G R I G H T / L E F
T
U O U T
N
T U O
O
Z Z W
O L O
L / R / L
T F E L /
T
I
SPECIFICATIONS
Max Input Level:
Max Output Level:
Frequency Response:
kHz
+20 dB
+20dB RCA, 0 dB XLR
(Low Z) 50 Hz to 16
Weight:
1 lb (.45 kg)
To snake or mixer
Size:
2” x 3.5” x 1.25”
(5 x 9 x 3.2 cm)
Owners Manual
WARRANTY
For information on the Rolls One Year Limited Warranty, and
to register this product, visit our website at www.rolls.com
SCHEMATIC
4
J2B
OUTPUT
RCAX4 PC
6
P2
P100K
1
J2A
R1
10K
3
XFMR AUDIO PC
T1
RCAX4 PC
INPUTS
R2
10K
3
J1
3.5STJK
SW1
J2
2
3
1
XLR JACK M
P1
P100K
SPST
Rolls Corporation
5968 So 350 West
Murray
Utah 84107
DB14b AV Presenter
Document Number:
Rev:
A
Ba
DB14.SCH
Date: 1 february 2010
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