Jensen Transformers MEDIA-2 Specifications

Jensen...The Worlds Finest Audio Transformers

Media-2 Two channel direct box

• Converts instrument and line level signals to balanced mic level

• Eliminates hum and buzz caused by ground loops

• Ruleratfrequencyresponsefrom20Hzto20kHz

• Featuresvariableinputtrimforquickadjustmentsonstage

The Iso-Max Media-2 is a multi-purpose stereo direct box and isolator de­signed to interface all types of unbalanced sources to the PA system while
enabling signals to be driven distances to 100 meters (300’) or more without
high frequency loss or introducing noise into the signal path.

The design begins with a rugged extruded aluminum enclosure and steel
slide-in inner tray with recessed zones at each end to protect the switches
and connectors. At one end, stereo ¼” inputs for instruments, RCA inputs for
consumer audio devices and a 3.5mm mini TRS for laptops are wired in par­allel to act as thru-puts. A variable trim decreases input sensitivity for greater
signal handling when interfacing line level sources. At the other end, two XLR
male outputs with ground lift makes for easy connection. As the Iso-Max
Media-2 is completely passive, no power is required.

Inside, two high-performance Jensen JT-DB-EPC transformers delivers ex­ceptional audio and provides galvanic isolation to eliminate ground loops

as it passively lowers the impedance and performs the balancing. A 22 kΩ

input impedance optimizes signal-to-noise for consumer-type products and
is supplemented with internal Faraday shielding to protect against interfer­ence from RF. An external MuMETAL® can further protects the sensitive in­ternal workings of the transformer to ensure a quiet interference-free per-

formance even when surrounded by magnetic elds from ampliers, power

supplies and stage light dimmers.

With over +22 dB of signal handling capacity, the Media-2 direct box grace­fully handles extreme signals such as those produced by high output digital
sources while providing instant access to level adjustments during hectic
shows. These features combine to make the Media-2 the ideal choice for
multi-media technicians and presenters.

Media-2

3.5mm TRS - TRS input provides inter-

face for laptops and tablets.

INPUTS - 1/4” and RCA
stereo input can be
used with CD players,
tape decks, VCRs, etc.
A second set of RCA
jacks can be used as a
thru-put.

Trim - Used to set the

level going into the
Media-1.

Balanced Outputs -

Balanced low-z outputs
enables long cable runs
without noise.

Ground Lift - Discon­nects the ground path
pin-1 for the XLR output

Applications

Usinginakeyboardsetup

Use your laptop as a sound source with the
Media-2 connected to control the volume
and send a balanced signal to a PA system.

Jensen Transformers Inc., 9304 Deering Ave. Chatsworth, CA 91311
P: [phone] F: [phone] [e-mail]

Using with a DJ setup

Simplify your DJ setup using a PC to play

sound les and the Media-2 to balance the

signal. The handy volume control makes it
easy to manage.

Using with a tablet

Play your sound les using the Media-2 by

connecting it from the headphone output to
the 3.5mm input. Use the variable level con­trol to trim the level and avoid distortion.

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Jensen...The Worlds Finest Audio Transformers

Media-2

THD at FIXED INPUT LEVELS

THD+N (%) vs FREQUENCY (Hz) DISTORTION at FIXED FREQUENCIES

THD+N (%) vs INPUT LEVEL (dBU)

1.01.0

+20 dBu

0.1

0.1

20Hz

30Hz

+10 dBu

0.01

Low level distortion
measurements limited
by thermal noise.

0.001
200

0.01

0.001

2K 20K -20 -10 -0 +10 +20

-3020

50Hz

Low level measurements
of distortion are limited
by thermal noise

REFERENCE LEVEL RESPONSE AMPLITUDE (dB) vs FREQUENCY (Hz) DEVIATION (Deg) vs FREQUENCY (Hz)DEVIATION FROM LINEAR PHASE

+5

+3

+4

+3

+2

+1

+2

+1

0

REF

-1

-2

-1

-2

-3

-4

-3

0.2 100 200 202K1K 20010K 2K20K 20K

PARAMETER CONDITIONS MINIMUM TYPICAL MAXIMUM

Input impedance, Zi

Voltage gain 1 kHz, 0 dBu, test circuit 1 -20 dB -40 dB

Magnitude response, ref 1 kHz

Deviation from linear phase (DLP) 20 Hz to 20 kHz, +4 dBu, test circuit 1 +1.2/-0° ±2.0°

Distortion (THD)

Maximum 20 Hz input level 1% THD, test circuit 1 +19.5 dBu +21.5 dBu

Input common mode rejection ratio (CMRR)
unbalanced source

Output impedance, Zo 1 kHz, test circuit 1 145 Ω 150 Ω 155 Ω

Optimal cable length

Temperature range operation or storage 0°C 70°C

All levels are input unless noted

*Passive instruments such as a Fender Jazz bass are subject to noise as their signal is not buered by an active preamp. For these keeping
the input cable shorter will result in less noise.

** IMPORTANT NOTE: THIS PRODUCT IS NOT INTENDED FOR USE IN CIRCUMSTANCES WHERE THE DC OR PEAK AC VOLTAGE
BETWEEN INPUT AND OUTPUT CONNECTIONS EXCEEDS 34 VOLTS OR WHERE ITS FAILURE COULD CAUSE INJURY OR DEATH.

1 kHz, 0 dBu, test circuit 1 19 kΩ 22 kΩ

20 Hz, +4 dBu, test circuit 1 -0.25 dB -0.08 dB 0.0 dB

20 kHz, +4 dBu, test circuit 1 -0.25 dB -0.07 dB +0.1 dB

1 kHz, +4 dBu, test circuit 1 <0.001%

20 Hz, +4 dBu, test circuit 1 0.036% 0.10%

60 Hz, test circuit 2 80 dB

3 kHz, test circuit 2 40 dB 45 dB

input* 3 m (10’) 15 m (50’)

output 30 m (100’) 150 m (500’)

100K

-5

Test Circuit 1:

Test Circuit 2:

Test Circuit 3:

All minimum and maximum specica­tions are guaranteed. Unless noted

otherwise, all specications apply at

25

°C. Specications subject to change

without notice. All information herein
is believed to be accurate and reliable,
however no responsibility is assumed
for its use nor for any infringements of
patents which may result from its use.
No license is granted by implication or
otherwise under any patent or patent
rights of Jensen Transformers, Inc.

1 k

1 k

1 k

Jensen Transformers Inc., 9304 Deering Ave. Chatsworth, CA 91311
P: [phone] F: [phone] [e-mail]

jensen-transformers.com