SUB-XX Single channel isolator

149.99 Request

Single channel isolator with extended low frequency response for pro audio subwoofers with balanced XLR inputs.

  • Eliminates hum and buzz caused by ground loops
  • Extended low frequency response down to 0.1 Hz
  • Less than 0.01% distortion at 20 Hz
  • Plug and play easy to use, no power required

The design begins with an extruded aluminum case that comes standard with gold plated XLR connectors. Plug and play easy to use, this passive interface does not require any power to work. Inside is a high performance Jensen transformer that is able to withstand signal levels to +18 dBu at 20 Hz without discernible distortion. This provides galvanic isolation between the input and output to eliminate hum and buzz caused by ground loops, while rejecting 60 Hz noise by as much as 105 dB.

Applications

Isolating a sub woofer in the studio

Many sub woofers have stereo inputs with an internal mono summing mixer. Send the balanced output from your playback system to the SUB-XX and the output to your sub. The Iso-Max SUB-XX will faithfully deliver the signal without smearing or choking.

Isolating a sub woofer in a PA system

The use of sub woofers in a PA system has become common in most touring setups. Use the SUB-XX to isolate the sub-woofer amplifier racks to eliminate ground loops without affecting the audio signal path. The SUB-XX is able to withstand tremendous signal levels without distortion.

Specifications

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

PARAMETER CONDITIONS MINIMUM TYPICAL MAXIMUM
Input impedance, Zi 100 Hz, -10 dBV, test circuit 1 39.0 kΩ 39.4 kΩ 39.8 kΩ
Insertion loss 100 Hz, -10 dBV, test circuit 1 -0.30 dB 0.00 dB .30 dB
Magnitude response, ref 100 Hz 2 Hz, -10 dBV, test circuit 1 -0.25 dB -0.11 dB -0.00 dB
Magnitude response, ref 100 Hz 2 kHz, -10 dBV, test circuit 1 -0.8 dB -0.65 dB -0.50 dB
Deviation from linear phase (DLP) 10 Hz to 2 kHz, -10 dBV, test circuit 1   +0.7/-0° ±2.0°
Distortion (THD) 100 Hz, -10 dBV, test circuit 1   <0.001%  
Distortion (THD) 20 Hz, -10 dBV, test circuit 1   0.01% 0.05%
Maximum 20 Hz input level 1% THD, test circuit 1 +16 dBV +18 dBV  
Common – mode rejection ratio (CMRR) 60 Hz, test circuit 2   105 dB  
Common – mode rejection ratio (CMRR) 3 kHz, test circuit 2 50dB 65 dB  
Output impedance, Zo 100 Hz, test circuit 1   5.00 kΩ  
Allowable source impedance (output impedance of device driving the ISO-MAX input) 0 600 Ω 2 kΩ
Allowable load impedance (input impedance of device loading the ISO-MAX output) 20 kΩ 47 kΩ ∞ 
Allowable load capacitance (cable & input capacitance loading the ISO-MAX output) 0 50 pF 1000 pF
Optimal cable length input   30 m (100’) 200 m (650’)
Optimal cable length output   1 m (3’) 3 m (10’)
Temperature range operation or storage 0°C   70°C
Input to Output Voltage Difference* input to output shield or either shield to chassis, 60 Hz     24 V RMS 34 V peak

Graphs

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

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