RDL FPMP1 Data Sheet

FLAT-PAK

™

SERIES

Model FP-MP1
Microphone Preamplifier

ANYWHERE YOU NEED...

• Professional Low Noise Performance

• Switchable Internal Phantom Voltage

• XLR and Terminal Block Connections

• Selectable Input Level Ranges

• Adjustable Gain with LED Metering

• Ultra-Compact All Metal Construction

• Convenience of RDL FLAT-PAKs

You Need The FP-MP1!

The FP-MP1 is part of the group of versatile FLAT-PAK products from Radio Design Labs. The unique
FLAT-PAK case can be directly screwed or bolted to cabinets or shelves. Optionally available rack­mounting accessories permit single or multiple FLAT-PAK module mounting. All FLAT-PAK modules are
supplied with a power interconnect cable for daisy-chaining multiple modules from a single power supply.

APPLICATION: The FP-MP1 is the ideal choice in most applications where mic to line preamplification is
desired. Power connections are made using either the full-size barrier block terminals or a dc power jack
located in one end panel. A second dc power jack is provided on the other end panel for connecting
additional FLAT-PAK modules.

The FP-MP1 features an XLR microphone input jack and an XLR line level output. The module also
provides a plug-in terminal block for direct wiring to the input and output. A front-panel switch permits the
installer to direct phantom voltage to the input connectors. This 3-position switch provides 24V, 12V or
PHANTOM OFF. Two switches select the input gain range thereby permitting the connection of standard
or high output level microphones. A low frequency roll-off filter is selected by another front-panel switch.
Each of these switches is recessed to avoid inadvertent actuation. Final gain adjustment is set using a
front-panel single turn trimmer while observing the LED output level meter. The dual LED output meter
follows standard VU ballistics. The intensity of the green LED progresses from minimum at -11 dBu to full
intensity at +4 dBu. Flashing of the red LED is equivalent to a VU meter needle swinging above the 0
level.

RDL’s exclusive low noise discrete preamplifier circuitry produces studio quality low noise performance in
an economical preamplifier. The XLR and plug-in terminal block connections make the FP-MP1 the ideal
choice for both rack mounted hardwired installations and remote use with standard audio cables. The
FP-MP1’s low profile and compact size permit mounting in confined spaces and in various locations in
equipment racks. Standard rack mounting is accomplished using the RDL FP-RRA Rack Adapter. The
location of the input/output jacks permits high density mounting against flat surfaces while maintaining
accessibility to the connectors.

Wherever a high quality microphone preamplifier is needed to provide reliability, compactness and
unsurpassed versatility, the FP-MP1 is the ideal choice. Use the FP-MP1 individually, or combine it with
other RDL products as part of a complete audio/video system.

RDL •• P.O. Box 1286 •• Carpinteria, CA., USA 93014 •• [phone] •• FAX [phone] •• http://www.rdlnet.com

FLAT-PAK

™

SERIES

Model FP-MP1
Microphone Preamplifier

Installation/Operation

EN55103-1 E1-E5; EN55103-2 E1-E4

Typical Performance reflects product at publication time
exclusive of EMC data, if any, supplied with product.
Specifications are subject to change without notice.

OR

24 VDC
POWER

SOURCE

Signal From Microphone

24 VDC

2A MAX

POWER

1A MAX

INPUTBUS

LOW GAIN

OFF
12V

MED GAIN

24V

HIGH GAIN
MIN GAIN

INPUT

INPUT

OUTPUT

OR

OR

Other Equipment or

Module Line Level Input

+

+

GAIN
TRIM

OUTPUT

AUDIO

LOW

OUT

CUT

LEVEL

IN

+4

FP-MP1
24 VDC

80 mA

2A MAX

PWR BUS

MICROPHONES
REQUIRING NO

PHANTOM

SET GAIN SWITCH TO MEDIUM (MED)
ADJUST LEVEL CONTROL
FOR STEADY GREEN AND INTERMITTENT RED LED
IF MORE OR LESS GAIN REQUIRED, SWITCH RANGES:

HIGHER GAIN LOWER GAIN VERY LOW GAIN

= SWITCH POSITION DOES NOT MATTER

Power to Additional

Flat-Pak Modules, Total

Current Not to Exceed 2 A

or Available Supply Current

SWITCH SETTINGS

NOTE: SET PHANTOM SWITCH
BEFORE CONNECTING MICROPHONE

MICROPHONES

REQUIRING 12VDC

OFF
12V
24V

LOW GAIN
MED GAIN
HIGH GAIN
MIN GAIN

FLAT FREQUENCY RESPONSE SETTING

LOW FREQUENCY CUT FILTER SETTING

PHANTOM

LOW GAIN
MED GAIN
HIGH GAIN
MIN GAIN

OFF
12V
24V

LOW GAIN
MED GAIN
HIGH GAIN
MIN GAIN

MICROPHONES

REQUIRING 24VDC

PHANTOM

OFF
12V
24V

AUDIO

OUT

LEVEL

+4

LOW GAIN
MED GAIN
HIGH GAIN
MIN GAIN

(HIGH OUTPUT MICS)

TYPICAL PERFORMANCE

Input Impedance: 3 kΩ (balanced)
Gain Range (4): MIN: 19 dB to 38 dB (switch selectable)
LOW: 26 dB to 45 dB (switch selectable)
MED: 36 dB to 55 dB (switch selectable)
HIGH: 46 dB to 65 dB (switch selectable)
Input Clipping Level: +4 dBu
Headroom: 20 dB (above +4 dBu)
Low-Cut Filter: 80 Hz, 6 dB/octave (switch selectable)
Phantom Voltages: 12 V, 24 V (switch selectable)
Phantom Voltage and Buildout Standard: IEC 1938: 1996-12
CMRR: > 60 dB (100 Hz to 5 kHz)
Frequency Response: 20 Hz to 20 kHz (+/- 0.2 dB)
THD + N: < 0.1% (+4 dBu, all gain settings)
IMD: < 0.1%
Noise: < -70 dB (below +4 dBu @ 60 dB gain – wideband)
< -72 dB (below +4 dBu @ 60 dB gain – A weighted)
< -80 dB (below +4 dBu @ 50 dB gain – wideband)
Equivalent Input Noise: < -130 dB (gain + residual noise below +4 dBu)
Connector type: XLR female (input); XLR male (output);
5 position plug-in terminal block (input and output)
Audio Level Indicators (2): Red LED: Output level > +4 dBu
Green LED: -10 to +4 dBu (variable intensity)
Power Requirement: 24 Vdc @ 100 mA, Ground-referenced
Overall Dimensions: Height: 1.42 in. 3.61 cm
Width: 3.25 in. 8.26 cm
Length: 4.64 in. 11.79 cm

891-2070D

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