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INSTALLATION AND
INSTALLATION AND
OPERATION MANUAL
OPERATION MANUAL
Model numbers:
EZ-MPA1 includes power supply with North American plug
EZ-MPA1
EZ-MPA1X includes worldwide power supply (specify plug)
Microphone Preamplifier with Compressor
RDL EZ Series products provide the highest level of value to A/V professionals and A/V users who demand professional quality.
RDL EZ Series products provide the highest level of value to A/V professionals and A/V users who demand professional quality.
For long-term performance, quality and value, you have made the EZ choice. EZ products are made in the USA by RDL, the
For long-term performance, quality and value, you have made the EZ choice. EZ products are made in the USA by RDL, the
inventor of application-specific modules bringing decades of experience as the world’s leading manufacturer of high-reliability
inventor of application-specific modules bringing decades of experience as the world’s leading manufacturer of high-reliability
performance products to the A/V industry. Visit the RDL website for hundreds of professional A/V products made in the USA by RDL.
performance products to the A/V industry. Visit the RDL website for hundreds of professional A/V products made in the USA by RDL.
www.rdlnet.com
www.rdlnet.com
Decades of Performance, Quality and Value
Decades of Performance, Quality and Value
RDL• 659 N. 6th Street • Prescott, AZ • USA 86301 • Sales: 800-281-2683 • 928-443-9391
RDL• 659 N. 6th Street • Prescott, AZ • USA 86301 • Sales: 800-281-2683 • 928-443-9391
Tech Support: 800-933-1780 • 928-778-3554 • RDL Europe Sales & Support: (31) 20-6238-983
Tech Support: 800-933-1780 • 928-778-3554 • RDL Europe Sales & Support: (31) 20-6238-983
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EZ-MPA1
Microphone Preamplifier with Compressor
•
Balanced Microphone Input on Rear-Panel XLR
•
Switch-Selectable Phantom on Rear Panel
•
Unbalanced Output on MINI or RCA Rear-Panel Jacks
•
Preamp Feeds Left and Right Output Channels
•
Front-Panel Compressor Enable/Disable Switch
•
Audio Compressor Controls Overloads
•
Front-Panel LEVEL Control
•
Dual-LED VU Meter
The EZ-MPA1 is a microphone preamplifier with front-panel volume control and audio level metering. A front-panel switch engages
an audio compressor to control overloads and clipping during high level audio bursts or peaks from the microphone. Dynamic or
condenser microphones are both supported with rear-panel switchable phantom voltage. The preamplified mic signal feeds both
channels of the line output on RCA or MINI jacks. LED VU metering facilitates easy level adjustment. The EZ-MPA1 is ideal for
adding microphone inputs to mixers and amplifiers with line inputs. It is used in houses of worship, restaurants, clubs, meeting
rooms, educational facilities, conference rooms, studios and commercial sound systems.
TYPICAL APPLICATION
Note: The EZ-MPA1 is also commonly used to feed
line-level inputs of an audio mixer or computer/recorder.
Amplifier
Microphone
EZ-MPA1
www.rdlnet.com • • • www.rdlez.com
www.rdlnet.com • • • www.rdlez.com
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AUDIO COMPRESSOR
The compressor controls overload and
clipping over a wide dynamic range of
input signal level, and normally should be
enabled. Set the switch to either enable
(button IN) or disable (button OUT)
compression.
OUTPUT VU METER
The LED VU meter monitors the unbalanced output for
proper -10 dBV level. With audio present, the variable
intensity green LED should be as bright as possible with the
red LED flashing occasionally. (The red LED flashes when
the output level exceeds -10 dBV.)
OUTPUT LEVEL
Adjust the gain control for the correct
level on the OUTPUT LEVEL meter.
24 VDC POWER INPUT
Insert plug from power
supply. Rotate 1/4 turn
clockwise to lock.
PHANTOM SELECTOR
Set for mic type connected:
Dynamic mic: OFF (out)
Condenser mic: ON (in)
POWER INDICATOR
Glows blue when the
product is connected to
a valid power source.
MICROPHONE INPUT
Connect a microphone to
the XLR jack. Microphone
may be either a dynamic or
condenser type.
POWER CONNECTION
POWER CONNECTION
Insert Power Plug
Insert Power Plug
Rotate 1/4-turn
Rotate 1/4-turn
clockwise to lock
clockwise to lock.
Rotate 1/4-turn
Rotate 1/4-turn
counter-clockwise
counter-clockwise
to unlock
to unlock.
LINE OUTPUT
Connect to other equipment line input from either the
RCA jacks or from the stereo MINI-jack.
FIXED MOUNTING RUBBER FEET ATTACHMENT
FIXED MOUNTING RUBBER FEET ATTACHMENT
Screw
Screw
directly to flat
directly to flat
surface without
surface without
installing rubber feet.
installing rubber feet.
Peel backing and stick the 4 rubber
Peel backing and stick the 4 rubber
feet to chassis in recesses provided.
feet to chassis in recesses provided.
Recess
Recess
Bottom View
Bottom View
of chassis
of chassis
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SELECTED MOUNTING ACCESSORIES
EZ-RA6
Rack Adapter for 6 Increments of 1/6 Rack Width
EZ-CC6
Component Chassis for 6 Increments of 1/6 Rack Width
Complete accessory listing available at: rdlez.com
EZ-SMB2
Surface Mount Bezel for 1/3 Rack Width Products
EZ-UCB2
EZ-UCB2
Under-Counter Brackets 1/6 or 1/3 Rack Width
Under-Counter Brackets 1/6 or 1/3 Rack Width
TYPICAL PERFORMANCE
TYPICAL PERFORMANCE
Input: 1.2 kΩ balanced on XLR jack, mic-level, -11 dBu max.
Level control: Off to 50 dB gain
Outputs (2): -10 dBV nominal on RCA jacks or Mini jack, +16 dBV max. without compression, -4 dBV max. with 20 dB compression
Frequency Response: 80 Hz to 40 kHz (±1 dB, mic input, -6 dB at 20 Hz with integral high-pass filter)
THD+N: < 0.1% (35 Hz to 20 kHz, -50 dBu input)
Compression: 20 dB range, switch-selectable
CMRR: > 55 dB (20 to 20 kHz)
Metering: Dual-LED VU Meter, calibrated to -10 dBV output
Phantom: Switch-selectable 24 V (IEC 1938: 1996-12)
Noise: < -65 dB (below -10 dBV output, -50 dBu input)
24 Vdc power supply current: 55 mA (idle), 80 mA (max.), 100 mA (max. with phantom)
Power supply input voltage: 100 to 240 VAC
Warranty: 3 Years; contact RDL technical support department for assistance
Case dimensions: 5.75” (14.6 cm)W x 3” (7.6 cm)D
Mounting size: 1/3 rack width
EZ-DC2
Desktop Chassis 1/3 Rack Width
EZ-SD2
Storage Drawer 1/3 Rack Width
Use In Place of Filler Panel
Holds Adapters and Cables
Mounts in EZ-CC6 and EZ-RA6
Copyright © 2009 Radio Design Labs, Inc. RDL, Radio Design Labs and the RDL logo are registered trademarks of Radio Design Labs, Inc. Data reflects product at publication time, subject to change without notice. “Made in USA” applies to all EZ products except power supplies.
Copyright © 2009 Radio Design Labs, Inc. RDL, Radio Design Labs and the RDL logo are registered trademarks of Radio Design Labs, Inc. Data reflects product at publication time, subject to change without notice. “Made in USA” applies to all EZ products except power supplies.
891-1615
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