MS-2XX Two channel mic splitter

The Iso•Max MS-2XX is a passive two channel mic splitter that lets you take a microphone signal and send it to two consoles at the same time.

  • Stereo isolator sends mic signal to two outputs
  • Delivers exceptionally low distortion down to 20 Hz
  • Ruler flat frequency response from 5 Hz to 100 kHz
  • Plug and play easy to use, no power required

The design begins with a rugged flanged steel encloser for easy mounting in a rack or inside a NEMA enclosure. Standard gold plated 3-pin XLR-female inputs and XLR-male isolated outputs. Removable screw-down terminal block as a direct output and phantom power return for condenser mics. Inside are two premium Jensen mic bridging transformers equipped with dual Faraday internal shields and external MuMETAL® cans. These isolate the two consoles, eliminating ground loops while reducing common-mode noise by as much as 130 dB. This is augmented with a 8 position DIP switch that lets you optimize grounding and RF filtering to suit your specific installation needs.

Made for the most demanding professionals, the MS-2XX delivers a ruler flat response from 5 Hz to 100 kHz with less than 2° phase shift at 20 Hz. This makes the MS-2XX ideal for isolating or distributing mic signals in recording studios, broadcast houses and performance venues.

Applications

MS-2XX with dynamic mics

To eliminate noise, isolate your microphones using the XLR-female inputs and send the output to your mixing console via the XLR-males. For mic splitting, use the screw-down terminal block as a direct out. This also lets you pass 48V phantom for condenser microphones.

Specifications

All levels are input unless noted, +4 dBu = 1.23 V RMS

PARAMETER CONDITIONS MINIMUM TYPICAL MAXIMUM
Input impedance, Zi 1 kHz, -20 dBu, test circuit 1 1.00 kΩ 1.08 kΩ 1.15 kΩ
Insertion loss 1 kHz, -20 dBu, test circuit 1 -0.90 dB -0.82 dB -0.70 dB
Magnitude response, ref 1 kHz 20 Hz, -20 dBu, test circuit 1 -0.25 dB -0.09 dB ±0.0 dB
Magnitude response, ref 1 kHz 20 kHz, -20 dBu, test circuit 1 -0.25 dB -0.10 dB +0.1 dB
Deviation from linear phase (DLP) 20 Hz to 20 kHz, -20 dBu, test circuit 1   +1.7/-0° ±3.0°
Distortion (THD) 1 kHz, -20 dBu, test circuit 1   <0.001%  
Distortion (THD) 20 Hz, -20 dBu, test circuit 1   0.036% 0.15%
Maximum 20 Hz input level 1% THD, test circuit 1 0 dBu +2.0 dBu  
Common – mode rejection ratio (CMRR) 600 Ω balanced / unbalanced source 60 Hz, test circuit 2 / 3   130 dB / 155 dB  
Common – mode rejection ratio (CMRR) 600 Ω balanced / unbalanced source 3 kHz, test circuit 2 / 3 80 dB / 65 dB 95 dB / 80 dB  
Recommended source impedance ouput impedance of device driving ISO-MAX input 0 Ω 150 Ω 500 Ω
Recommended load impedance input impedance of device loading ISO-MAX output 1.0 kΩ 1.5 kΩ  
Output impedance, Zo 1 kHz, test circuit 1   231 Ω  
Optimal cable length input   8 m (26’) 30 m (100’)
Optimal cable length output   30 m (100’) 100 m (300’)
Temperature range operation or storage 0°C   70°C
Input to Output Voltage Difference* any input to any output shield or any shield to case, 60 Hz     24 V RMS 34 V peak

Graphs

Phase Distortion (DLP)
Frequency Response
THD vs Level at Low Frequencies
THD vs Frequency at Various Levels

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