Jensen Transformers Iso-Max PI-XX - Single-Channel Line-Input Isolator (XLR In/Out)

Jensen Transformers Iso-Max PI-XX - Single-Channel Line-Input Isolator (XLR In/Out)

Jensen Transformers Iso-Max PI-XX - Single-Channel Line-Input Isolator (XLR In/Out)

Jensen Transformers Iso-Max PI-XX - Single-Channel Line-Input Isolator (XLR In/Out)

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Expected availability: 7-14 business days

Product Highlights

  • Isolates Input of Connected Device
  • Jensen High-Performance Transformer
  • Eliminates Hum & Buzz from Ground Loops
  • Reduces Electromagnetic Interferences
  • Frequency Response of 5 Hz to 40 kHz
  • Low Distortion Down to 20 Hz
  • Gold-Plated XLR In/Out
  • Passive Design Requires No Power
  • Rugged Steel Enclosure
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Connection Type: XLR In/Out


Not available with current selections

Channels: Single-Channel


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This item is noncancelable and nonreturnable.

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Jensen Transformers PI-XX overview

  • 1Description

The Jensen Transformers Iso-Max PI-XX is a passive, single-channel line-input isolator which prevents and eliminates hum and buzz by isolating the input of the connected device. It also attenuates electromagnetic interference (EMI) and radio frequency interference (RFI) problems, making it an ideal tool for use in recording studios, broadcast houses or performance venues.

The PI-XX features a high-performance Jensen transformer with internal Faraday shield, which provides galvanic isolation between the input and output to eliminate ground loops and reduce common-mode noise by as much as 124 dB. The unit delivers a flat frequency-response from 5 Hz to 40 kHz, and can withstand signals in excess of +19 dB at 20 Hz, without introducing distortion, phase shift or artifact of any kind.

Easy to set up, with no power required, the PI-XX features gold-plated XLR input/output connectors for applications with balanced audio systems. The device is equipped with a rugged, extruded aluminum case and is well-suited to stand up to the rigors of live use.

Key Features
  • Passive, single-channel line-input isolator 
  • Isolates the input of the connected device
  • Connects between the source and the input destination to eliminate hum and buzz caused by ground loops
  • Reduces electromagnetic interference (EMI) and radio frequency interference (RFI) problems
  • Jensen high-performance transformer with internal Faraday shield improve rejection of high-frequency buzz by a factor of 100 to 1000 (40 dB to 60 dB) over traditional transformers 
  •  Works without introducing distortion, phase shift or artifact of any kind
  • Ruler-flat frequency response from 5 Hz to 40 kHz 
  • Handles signals in excess of +19 dB at 20 Hz, without discernible distortion 
  • Rejects noise by as much as 124 dB
  • Standard, gold-plated 3-pin XLR-female input and XLR-male output connectors
  • Rugged, extruded aluminum case
  • Plug-and-play, easy to use, no power required


UPC: 676101041596
Table of Contents
  • 1Description

Jensen Transformers PI-XX specs

Type Passive line-input isolator
Channels Single
Connectors 3-pin XLR-female, gold-plated, balanced (input)
3-pin XLR-male, gold-plated, balanced (output)
Frequency Response 5 Hz to 40 kHz
Input Impedance Zi, 1 kHz, +4 dBu, test circuit 1
Minimum: 22.0 kOhms
Typical: 23.5 kOhms
Maximum: 25.0 kOhms
Insertion Loss 1 kHz, +4 dBu, test circuit 1
Typical: 1.6 dB
Maximum: 2.0 dB
Magnitude Response 20 Hz, +4 dBu, test circuit 1, ref 1 kHz
Minimum: -0.15 dB
Typical: -0.03 dB
Maximum: ±0.0 dB

20 kHz, +4 dBu, test circuit 1, ref 1 kHz
Minimum: -1.0 dB
Typical: -0.70 dB
Maximum: ±0.0 dB
Deviation from Linear Phase 20 Hz to 20 kHz, +4 dBu, test circuit 1
Typical: +1.4 / -0°
Maximum: ±2.0°
Distortion (THD) 1 kHz, +4 dBu, test circuit 1
Typical: <0.001%

20 Hz, +4 dBu, test circuit 1
Typical: 0.04%
Maximum: 0.10%
Maximum Input Level At 20 Hz, 1% THD, test circuit 1
Minimum: +17 dBu
Typical: +19 dBu
Common Mode Rejection Ratio 60 Hz, test circuit 2 / 3
Typical: 124 dB / 95 db

3 kHz, test circuit 2 / 3
Minimum: 85 dB
Typical: 95 dB / 85 db

(600 Ohms balanced / unbalanced source)
Output Impedance Zo, 1 kHz, test circuit 1
Typical: 4.65 kOhms
Source Impedance Minimum: 0 Ohm
Typical: 600 Ohms
Maximum: 2 kOhms

(Allowable output impedance of device driving the ISO-MAX input)
Load Impedance Minimum: 10 kOhms
Typical: 20 kOhms

(Allowable input impedance of device loading the ISO-MAX output)
Load Capacitance Minimum: 0 pF
Typical: 50 pF
Maximum: 100 pF

(Allowable cable and input capacitance loading the ISO-MAX output)
Optimal Cable Length Input
Typical: 3.3' / 1 m
Maximum: 9.8' / 3 m
Temperature Range 32 to 158°F / 0 to 70°C

(Operation or storage)
Voltage Difference Maximum: 24 V RMS, 34 V peak

(Input to output, any input to any output shield or any shield to case, 60 Hz)
Dimension (W x D x H) 3.0 x 3.0 x 2.0" / 76.2 x 76.2 x 50.8 mm
Packaging Infowywbxzwssddwqwucfcaayvsfrxaa
Package Weight 1.15 lb
Box Dimensions (LxWxH) 4.7 x 3.4 x 3.2"

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