™
PORTABLE AUDIO PLAYER INTERFACE
FEATURES:
» Convenient connection point for MP3 players and
laptop computers to house sound systems
» Ideal for application in meeting rooms and churches
» Transformer-isolated to solve grounding problems
» Stereo line inputs to stereo mic feeds
» Barrier strip output connection for easy installation
DESCRIPTION:
The Pro Co iPlate Portable Audio Player Interface is a device
that allows simple and reliable connection of the stereo
headphone output of audio devices such as MP3 players,
Apple® iPods, laptop computers and consumer-type CD and
DVD players to the balanced microphone inputs of audio
mixing consoles.
The iPlate provides both a Stereo mini 3.5 mm (1/8”) and
left/right RCA phono inputs for easy connection with
standard patch cables and a stereo/mono switch to provide
passive input summing to a dual mono output feed where
required.
The outputs are isolated via audiophile-grade Pro Co MBT-1
Microphone Bridging Transformers and outputs appear
on an easy-to-wire screw-type barrier strip (requiring no
crimp terminals) for rapid installation. The transformers
oer wide bandwidth and low distortion and phase shift,
and are magnetically shielded in mu-metal cans and
REAR OF PLATE
electrostatically isolated with dual Faraday shields. The
result is near-ideal rejection of common-mode signals
from all sources of RFI and EMI, including radio pickup, SCR
dimmers and 60 Hz hum.
The GROUND LIFT switch allows correct grounding for
either AC or battery-powered sources, eliminating hum
and buzz from ground loops between portable and house
equipment.
The iPlate is built on a standard-sized dual-gang wall plate
constructed of brushed and beveled 1/8” (3.175 mm)
anodized aluminum. All functions are clearly identied
by laser engraved legends, providing an attractive and
professional appearance in addition to trouble-free technical
functionality. Although the nish is clear (silver), other colors
including black and bronze are available on special order to
complement any décor that may be required.
Pro Co Sound
225 Parsons Street | Kalamazoo, MI 49007
800-253-7360 | www.procosound.com
» www.procosound.com
ENGINEERING SPECIFICATIONS:
The wall-mounted impedance matching unit shall be suitable for interfacing one (1) headphonelevel stereo source to one (1) balanced stereo or oating low-impedance (1.0 kohm nominal)
microphone preamplier inputs. There shall be one (1) stereo 3.5 mm phone jack marked “AUDIO
INPUT”. This input shall be wired to accept a standard 3.5 mm stereo plug. Additionally, there shall be
two (2) RCA-type jacks marked “L” and “R”. The input connectors shall be electrically isolated from the
mounting plate. There shall be a transformer isolated, low-impedance output on a screw-type barrier
strip. The transformers shall be a Pro Co MBT-1 Microphone Bridging Transformers.
The magnetic and the primary electrostatic shield of the transformers shall be connected to the
unbalanced input connectors. The secondary electrostatic shields shall be connected to the output
barrier strip. There shall be a miniature toggle-type switch marked “GROUND LIFT” to allow the
shields to be connected together or isolated as required.
The unit shall be suitable for mounting in a 2-gang masonry-type electrical box (Appleton M2-250
or equivalent). It shall be constructed of 1/8” (3.175mm) anodized aluminum and shall be provided
with a brushed nish as required and beveled edges. Control functions shall be identied by a laser-
TYPICAL PERFORMANCE:
VOLTAGE LOSS (@1.0 kHz): 1.0 dB
INPUT IMPEDANCE: 2.2 kohm
SECONDARY SOURCE IMPEDANCE: 270 ohm @1.0 kHz
TOTAL HARMONIC DISTORTION: < .1% 30 Hz-20 kHz
@ -15 dBv output
CONTROLS:
AUDIO INPUT: 3.5 mm stereo mini phone jack accepts
signals from unbalanced headphone level sources such as MP3/CD/DVD
players and computer audio cards.
STEREO/MONO SWITCH: Miniature toggle-type switch
provides input summing to combine
stereo sources for mono output for
applications where stereo operation is
not required.
engraved legend. The dimensions of the unit shall be approximately 2-1/2” (63.5 mm) D x 4-1/2”
(114.3 mm) W x 4-1/2” (114.3 mm) H.
The wall-mounted impedance-matching unit shall be a Pro Co TradeTools™ iPlate™.
The MBT-1 is a carefully designed, custom-built 1:1 microphone bridging transformer whose
characteristics are optimized for use with balanced low-impedance microphones or similar sources.
Special winding techniques and a high-permeability (80% nickel) core lamination preserve full
frequency response while minimizing signal losses and other “loading” eects. Mu metal can and
separate electrostatic shields for primary (input) and secondary (output) windings reduce capacitive
coupling of ground-borne electrical noise between main and stage monitor or recording mixers,
eliminating annoying 60-Hz hum and buzz. The source impedance of the MBT-1 is very similar to
that of a low-impedance microphone to ensure proper matching to the input circuitry of the mixer.
The result is clean transient response (minimal overshoot or ringing) and low distortion even at low
frequencies and high input levels.
FREQUENCY RESPONSE (Re: 1.0 kHz): +.2dB @ 20 Hz
- .6dB @ 20 kHz
- 4dB @ 65 kHz
INSULATION: > 600V winding/shield/winding
L/R: RCA phono-type jackswired in
parallel to the STEREO mini input.
GROUND LIFT: Miniature toggle-type switch used to
reduce hum and buzz by eliminating
ground loops and providing proper
grounding for various situations.
Breaks connection point between
input and output electrostatic shields.
PRO CO MODEL: iPlate DIMENSIONS ........4.56” W x 4.56” H x 1.25” D
......... 115.8mm W x 115.8mm H x 31.8mm D
WEIGHT.................................... 0.45 lb/0.20 kg
SHIPPING WEIGHT .................. 1.00 lb/0.45 kg
INPUTS
T
3.5mm
R
RCA L
RCA R
STEREO
MONO
Pro Co Sound
225 Parsons Street | Kalamazoo, MI 49007
800-253-7360 | www.procosound.com
MBT-1 TRANSFORMER
BLK
RED
BLU
RED
BLK
BLU
MBT-1 TRANSFORMER
WHT
(CAN)
WHT
(CAN)
GRN
WHT
YEL
GRN
YEL
WHT
6 POLE BARRIER STRIP
GND
LIFT
GND
LIFT
OUTPUT LEFT S (PIN 1)
OUTPUT LEFT H+ (PIN 2)
OUTPUT LEFT C- (PIN 3)
OUTPUT RIGHT S (PIN 1)
OUTPUT RIGHT H+ (PIN 2)
OUTPUT RIGHT C- (PIN 3)
SIDE VIEW
FRONT VIEW
» www.procosound.com
IPLATE-01 Rev.12/11
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