News, Tips & Reviews
About Us
The Professional's Source Since 1973
  • Help
  • 800.606.6969
Ask Our Experts800.606.6969
Hello, Log InAccount & Orders
My Cart

Join Bild Expo 2025 - Presented by B&H

Video Chat with a Pro Audio Expert - Live
Home

Jensen Transformers Iso-Max PI-2XX - 2-Channel Line-Input Isolator (XLR In/Out)

BH #JEPI2XX • MFR #PI-2XX
Print
Jensen Transformers Iso-Max PI-2XX - 2-Channel Line-Input Isolator (XLR In/Out)
Key Features
  • Isolates Input of Connected Device
  • 2 x XLR Inputs, 2 x XLR Outputs
  • Two Jensen High-Performance Transformers
  • Eliminates Hum & Buzz from Ground Loops
The Jensen Transformers Iso-Max PI-2XX is a passive, 2-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.
More Details
Special Order
Expected availability: 3-4 Months
$399.99
+
Save the Tax‡
or Pay $67/mo. suggested payments for 6 Mos.§ when you use the Payboo credit card. Learn More
Add to Cart
Free Standard Shipping
Protect Your Gear
Add a protection plan from $31.99
See Options
Ask an Expert
800.606.6969

Jensen Transformers PI-2XX Overview

The Jensen Transformers Iso-Max PI-2XX is a passive, 2-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-2XX features a pair of high-performance Jensen transformers with internal Faraday shields, which eliminate ground loops and reduce common-mode noise by as much as 124 dB. An 8-position DIP switch lets you optimize grounding and RF filtering to suit your specific installation needs. 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 discernible distortion.

Easy to set up, with no power required, the PI-2XX comes with a removable screw-down barrier strip for quick installation in NEMA enclosures and 19" racks. It features gold-plated XLR input/output connectors, for applications with balanced audio systems. The device is equipped with a rugged, flanged-steel enclosure and is well-suited to stand up to the rigors of live use.

Key Features
  • Passive, two-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
  • Two Jensen high-performance transformers with internal Faraday shields improve rejection of high-frequency buzz by a factor of 100 to 1000 (40 dB to 60 dB) over traditional transformers 
  • 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
  • 8-position DIP switch lets you optimize grounding and RF filtering to suit your specific installation needs
  • Removable, screw-down barrier strip for easy installation in NEMA enclosures and 19” racks
  • Standard, gold-plated 3-pin XLR-female input and XLR-male output connectors
  • Rugged, flanged-steel enclosure 
  • Plug-and-play, easy to use, no power required

 

UPC: 676101041602

Jensen Transformers PI-2XX Specs

Type
Passive line-input isolator
Channels
2
Connectors
2 x 3-pin XLR-female, gold-plated (inputs)
2 x 3-pin XLR-male, gold-plated (outputs)
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)
Dimensions
6.94 x 3.50 x 1.71" / 176.30 x 88.90 x 43.40 mm
Packaging Info
Package Weight
1.9 lb
Box Dimensions (LxWxH)
7.8 x 5.4 x 3.4"

Jensen Transformers PI-2XX Reviews

See any errors on this page?