Jensen ISO-MAX DB-2RM-WP User Manual

Jensen ISO•MAX

®

Jensen ISO•MAX

®

USER GUIDE

DB-2RM-WP Wall Direct Box DB-2RM-WP Wall Direct Box

FEATURES

ISO-MAX® DB-2RM-WP User Guide - Part No. R870 1215 00 • © Copyright 2014 all
rights reserved.

Specifi cations and appearance are subject to change without notice.

Jensen is a division of Radial Engineering Ltd.

ISO-MAX DB-2RM-WP SPECIFICATIONS

1. LEVEL: Let’s you adjust the volume level of your source device.

2. MONO: Mixes the left and right inputs together and outputs a
mono signal to the PA system.

3. LIFT: Disconnects the audio ground of both channel outputs to
eliminate hum and buzz created by ground loops.

4. 3.5MM INPUT: Stereo mini-phone jack lets you connect mobile
devices such as laptop computers, MP3 players or tablets.
Plugging in here will deactivate the RCA connectors.

5. RCA INPUT: A stereo pair of RCA inputs lets you connect a
wide range of consumer electronics such as CD/DVD players
and digital players/recorders.

6. STEEL ENCLOSURE COVER: Protects the audio circuit from
electro-magnetic and radio interference.

7. HEAVY DUTY FRAME: The PCB and cover mount to a ridgid
14-guage steel L-frame that’s powder-coated for long life.

8. OUTPUT TERMINALS: Balanced left and right mic-level output
connections are made via two screw-down terminals.

9. TIE-WRAP HOLD-DOWNS: Slots cut in the steel frame for
tie-wraps (included) help secure the cable and provide strain
relief for the connectors.

Frequency response .........................................20Hz to 18kHz +/- .5dB

Total harmonic distortion ..................................0.01% THD 20Hz to 20kHz

Stereo input ......................................................Unbalanced high-Z -10dB

Input connections ..............................................RCA and 3.5mm TRS

Stereo output ....................................................AES standard balanced 600-Ohm,

mic-level, pin-2 hot

Output connection .............................................Screw terminals

Input level..........................................................Variable from infi nity

Power requirement............................................None, completely passive

Mounting ...........................................................Fits single gang electrical junction box

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To meet the requirements of California Proposition 65, it is our responsibility to inform you of the following:

WARNING: This product contains chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm.

Please take proper care when handling and consult local government regulations before discarding.

jensen-transformers.com

JENSEN TRANSFORMERS 3 YEAR

TRANSFERABLE LIMITED WARRANTY

Jensen-transformers (“Jensen”) warrants this product to be free from defects in material and workmanship
and will remedy any such defects free of charge according to the terms of this warranty. Jensen will repair
or replace (at its option) any defective component(s) of this product (excluding fi nish and wear and tear
on components under normal use) for a period of three (3) years from the original date of purchase. In
the event that a particular product is no longer available, Jensen reserves the right to replace the product
with a similar product of equal or greater value. In the unlikely event that a defect is uncovered, please
call 818-374-5857 to obtain a RA number (Return Authorization number) before the 3 year warranty
period expires. The product must be returned prepaid in the original shipping container (or equivalent) to
Jensen or to an authorized repair center and you must assume the risk of loss or damage. A copy of the
original invoice showing date of purchase and the dealer name must accompany any request for work to
be performed under this limited and transferable warranty. This warranty shall not apply if the product has
been damaged due to abuse, misuse, misapplication, accident or as a result of service or modifi cation
by any other than an authorized repair center.

THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF
AND DESCRIBED ABOVE. NO WARRANTIES WHETHER EXPRESSED OR IMPLIED, INCLUDING
BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD
DESCRIBED ABOVE OF THREE YEARS. JENSEN SHALL NOT BE RESPONSIBLE OR LIABLE FOR
ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSS ARISING FROM THE USE
OF THIS PRODUCT. THIS W ARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MA Y ALSO
HAVE OTHER RIGHTS, WHICH MAY VARY DEPENDING ON WHERE YOU LIVE AND WHERE THE
PRODUCT WAS PURCHASED.

Jensen Transformers
9304 Deering Avenue, Chatsworth, CA 91311
Phone: [phone] • Fax: [phone]
www.jensen-transformers.com

DB-2RM-WP

WALL MOUNT DIRECT BOX

Thank you for purchasing the Jensen DB-2RM-WP stereo direct box. This
innovative direct box is designed to fi t 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 fi ts 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-2RM­WP is classifi ed as a low voltage device and should never be installed in
the same electrical junction box alongside high-voltage class-1 electrical
power devices. Please consult your local electrical authority before 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 PA mixer/amplifi er to the location where
the DB-2RM-WP is to be installed. Mark one of the cables with tape or magic
marker. This will help to indicate one cable as the left channel. Pull about 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

The included tie-wraps are used with hold-down slots cut into the frame to secure
the twisted pair cable and provide strain relief. Once secure, replace the cover
and fi t into the electrical junction box.

You will need to terminate the cables at the mixer/amplifi er 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

12

3

- G +

XLR and ¼” TRS Balanced terminations

The output is mic level and therefore should be connected to a microphone preamp
input. At the mixer/amplifi er, connect the left and right cables from the DB-2RM-WP to
two mic inputs on the PA mixer/amplifi er system. If there is only one mic input available
or if the PA system 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 DB­2RM-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.

The DB-2RM-WP features stereo RCA and 3.5mm TRS input jacks to connect
an unbalanced audio source. The RCA jack allows consumer electronics like
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 diffi cult to overload the DB-2RM-WP, however it is possible
to overload the input on the mixer/amplifi er. 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 PA system via the DB-2RM­WP direct box, you may encounter noise like hum and buzz caused by ground
loops. If you encounter noise after connecting, depress the ground LIFT switch
on the front panel. This disconnects the signal ground between the source
device and the PA system eliminating ground loop noise. The LIFT switch is
recessed to prevent tampering. Use a small screwdriver to access the switch.

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 Box DB-2RM-WP Wall Direct Box