STICK-ON® SERIES
Model ST-UMX3
Universal Audio Mixer
ANYWHERE YOU NEED...
•
Audio Mixing with Up To Three Inputs
•
Switch Selectable Mic or Line Inputs
•
Switch Selectable Mic or Line Output
• To Add Additional Microphone or Line
Level Inputs to an Existing Mixer
•
To Combine Signals of Different Level,
Impedance, or Bal./Unbal. Configuration
You Need The ST-UMX3!
The ST-UMX3 is part of a group of products in the STICK-ON series from Radio Design Labs. The
durable bottom adhesive permits quick, permanent or removable mounting nearly anywhere or it may be
used with RDL’s racking accessories. The ST-UMX3 gives you the advantage of a high performance
audio mixer with a big PLUS, you can put it where you need it.
APPLICATION: The ST-UMX3 is a three-channel audio mixer for combining mic-level or line-level
signals to a single output. A MIC/LINE switch is provided for each input. A separate MIC/LINE switch
selects the output level. Each input features a separate preamplifier circuit, which isolates it from the
other inputs. An audio-taper, single-turn gain adjustment is provided for each of the three input preamps.
Signals from the three preamps are actively summed and fed to the output line-level driver amplifier. The
output amplifier includes an RDL dual-LED VU meter.
The mic-level input circuits accept either balanced low-impedance mics or high-impedance unbalanced
mics. The line-level input circuits bridge any line-level audio source. The output is switch-selectable for
mic-level or line-level, and is capable of driving either high or low impedance, balanced or unbalanced
loads.
Each input level is set 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. If the output is switched to MIC level, the meter continues to indicate correct operating level. The
output MIC level is padded 50dB below the normal LINE output level.
The ST-UMX3 is powered from ground-referenced 24 Vdc, permitting the module to share a common
power source with most RDL modules.
The flexibility of switching each input and the output between MIC or LINE allows installers to address a
wide variety of mixing solutions with only one product type. Wherever a flexible mic and line level mixing
amplifier is needed, the ST-UMX3 is the ideal choice. Use the ST-UMX3 combined with other RDL
RACK-UP®, STICK-ON, TX™, or FLAT-PAK™ series products as part of a complete audio/video system.
RDL • P.O. Box 1286 • Carpinteria, CA., USA 93014 • (805) 684-5415 • FAX (805) 684-9316 • http://www.rdlnet.com
Europe [NH Amsterdam] (++31) 20
-
6238 983; Fax: (++
31) 20
-
6225-287
STICK-ON® SERIES
Model ST-UMX3
Universal Audio Mixer
G
A
I
N
SIGNAL
FROM
BALANCED
LINE-LEVEL
OR *MIC-LEVEL
SOURCE
(SELECTABLE)
UNIVERSAL AUDIO MIXER
INPUTS
1
LM
M L2M L3M L
OTHER
BALANCED
OR UNBAL
MIC OR LINE
INPUTS
M
OUTPUT M
I
C
PWR
SIGNAL
FEEDING
BALANCED
LINE-LEVEL
OR MIC-LEVEL
SOURCE
(SELECTABLE)
L
L
I
N
L
E
E
V
E
L
BALANCED
OR UNBAL
MIC OR LINE
SIGNAL
FROM
UNBALANCED
LINE-LEVEL
OR *MIC-LEVEL
SOURCE
(SELECTABLE)
AUDIO WIRING
OTHER
INPUTS
SIGNAL
FEEDING
UNBALANCED
LINE-LEVEL
OR MIC-LEVEL
SOURCE
(SELECTABLE)
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.
DUAL MIC PHANT
ADJUST
LEVELS
USING
METER
NORMAL
HIGH
MIC
SIGNAL
FROM
BALANCED
MIC-LEVEL
SOURCE
PHANTOM VOLTAGE ADJUS
MIC 1
OUT MIC
MIC 2
OUT
G
A
I
N
21
M L
*DYNAMIC MIC CONNECTIONS
(NO PHANTOM VOLTAGE)
SELECTABLE MIC OR LINE LEVEL
EACH INPUT AND THE OUTPUT MAY
BE SET TO MIC OR LINE LEVEL
M
L
LM
I
I
NC
E
LINE LEVEL
MIC LEVEL
L
MML
I
I
C
N
E
SUPPLY
WIRING
ADJUST
LEVELS
TYPICAL PERFORMANCE
Inputs (3): Mic: 600 Ω balanced; Line: 50 kΩ balanced
Max Input Signal: Mic: -18 dBu; Line: +25 dBu
Gain (each input): Mic: Adjustable from OFF to 60 dB
Line: Adjustable from OFF to 21 dB
Output: 150 Ω balanced; 75 Ω unbalanced
Output Signal: +4 dBu nominal, mic level 50 dB below line level
891-1105
NOTE: MIC INPUTS ON ST-UMX3 ARE NOT
PROTECTED AGAINST PHANTOM VOLTAGE.
USE THE ST MPA2 Mic Phantom Adapter.
Radio Design Labs Technical Support Centers
U.S.A. (800) 933-1780, (928) 778-3554; Fax: (928) 778-3506
CONDENSER MIC CONNECTION
(USING ST-MPA2 MODULE FOR PHANTOM VOLTAGE)
THIS
TERMINAL
IS COMMON
GROUND
24 VDC
POWER
SOURCE
THD+N: < 0.006%
IMD: Mic (@ 50dB gain): < 0.04%: Line: < 0.008%
Freq. Response: Mic: 50 Hz to 100 kHz (+/- 1 dB)
Line: 10 Hz to 100 kHz (+/- 0.05 dB)
Noise (each input): Mic: < -70 dB (50 dB gain)
Line: < -82 dB (unity gain)
Headroom: 18 dB
CMRR: Mic: > 60 dB; Line: > 50 dB (50 to 120 Hz)
Power Req.: 24 to 33 Vdc @ 55 mA, Ground-referenced
Loading...