Thank you for purchasing the Jensen DB-2RM-WP stereo direct box. This
innovative direct box is designed to fit a standard single-gang electrical wall
plate and provides the A/V integrator with an elegant means of connecting
a stereo audio source such as a laptop computer, CD player or tablet to a
professional audio system. Although the DB-2RM-WP is designed to be
plug & play easy to use, please take a minute to read this short manual. It
will give you insight on how to best use the DB-2RM-WP direct box and get
the most out of it.
INSTALLATION
The DB-2RM-WP fits a standard single gang electrical wall plate and should
be installed in accordance with the electrical codes in your region. It is the
responsibility of the installing contractor to comply with electrical codes
and regulations with regards to installing and terminating. The DB-2RM-
WP is classified as a low voltage device and should never be installed in
the same electrical junction box alongside high-voltage class-1 electrical
powerdevices. Pleaseconsult yourlocal electrical authoritybefore installing.
The DB-2RM-WP is completely passive and no power source is required.
Signal connections are made using standard twisted pair audio cable. This
usually comes in a shielded format with two insulated conductors 18AWG to
26AWG and a ground conductor often called the drain wire. The cable itself
should comply with all electrical codes as regulated in your area.
Shielded twisted pair audio cable with drain wire.
GROUND (DRAIN)
WHITE OR RED (+)
FOIL SHIELD
BLACK (-)
Run two twisted pair cables from the PAmixer/amplifier to the location where
the DB-2RM-WP is to be installed. Mark one of the cables with tape or magic
marker.This willhelp toindicateone cableas theleftchannel. Pullabout 20cm
(8”) of cable through the electrical junction box to allow easy manipulation
while installing. Strip back the cable insulation by 1cm (½”) and tin the bare
wire ends with solder to prevent corrosion.
Next, remove the protective metal cover from the DB-2RM-WP using a
Phillips screwdriver and locate the audio output terminals on either side
labelled ‘LEFT’ and ‘RIGHT’. The output terminals are balanced and have
three screw-down connections, one labelled negative (-); another labelled
ground (G); and a third labelled positive (+).
Left output Right output
CONNECTIONS
Starting with the left channel terminal, push the BLACK wire into the negative
connection and screw down tight using a small slotted screwdriver. Insert the
other color wire (sometimes white or red) into the positive connection and screw
it down tight. The drain wire or shield is inserted into the ground connection and
tightened. Repeat for the right channel.
Tie-wrap
inserted into
hold down slots
Theincluded tie-wrapsare usedwith hold-down slots cut intothe frameto secure
the twisted pair cable and provide strain relief. Once secure, replace the cover
and fit into the electrical junction box.
You will need to terminate the cables at the mixer/amplifier using the same
polarity. The following diagrams show balanced terminations for standard XLR
and ¼” TRS phone connectors.
SHIELD/DRAIN
RING (-)
TIP (+)
SLEEVE (G)
SHIELD/DRAIN
123
-G + XLR and ¼” TRS Balanced terminations
The output is mic level and therefore should be connected to a microphone preamp
input.At themixer/amplifier,connectthe leftandrightcablesfrom theDB-2RM-WPto
twomicinputson thePAmixer/amplifiersystem.If thereisonlyonemicinput available
or if the PAsystem operates in mono, you can connect the left channel and set the
DB-2RM-WP to mono mode by depressing the MONO switch on the front panel.
USING THE DIRECT BOX
Before connecting a device to the DB-
2RM-WP, turn the audio level control fully
counter-clockwise to the off position. This
will help avoid loud transients that can
damage more sensitive components like
tweeters and startle your audience.
TheDB-2RM-WP features stereoRCAand3.5mm TRSinputjacks toconnect
anunbalanced audiosource. TheRCAjack allowsconsumer electronicslike
CD/DVD players to connect to the PA system while the 3.5mm jack works
well with mobile devices like smart phones and tablets.
After connecting your device, start playback and slowly turn up the level
control on the DB-2RM-WP to a comfortable listening volume. Be aware
your device may also have its own volume control that you may need to
adjust. It is very difficult to overload the DB-2RM-WP, however it is possible
to overload the input on the mixer/amplifier. If you hear distortion, turn the
level control down or adjust the volume on your device.
USING THE GROUND LIFT
Sometimes when connecting your device to the PAsystem via the DB-2RM-
WPdirect box,youmay encounternoise likehum andbuzzcaused byground
loops.If youencounternoise afterconnecting, depresstheground LIFTswitch
on the front panel. This disconnects the signal ground between the source
device and the PAsystem eliminating ground loop noise. The LIFT switch is
recessedto preventtampering. Usea smallscrewdriver toaccess theswitch.
USING THE MONO SUM
The MONO switch on the front panel sums the left and right inputs together.
When this switch is fully depressed, the DB-2RM-WP will output the same
mono signal at both screw terminal outputs. This can be used to connect a
stereo device like a CD/DVD player to a mono only sound system or when
only one input at the mixer is available. The MONO switch is recessed to
prevent tampering. Use a small screwdriver to access the switch.
Jensen ISO•MAX
®
Jensen ISO•MAX
®
Jensen ISO•MAX
®
DB-2RM-WP Wall Direct Box DB-2RM-WP Wall Direct BoxDB-2RM-WP Wall Direct Box
