isolation transformers

Top ranking choices for B&H customers who searched for isolation transformers

The Pureformer from JK Audio is a stereo audio interface that employs transformers to provide hum and noise reduction for any two pieces of line level audio equipment. The unit removes ground loops and DC paths that can cause severe signal degradation.

The Pureformer functions by isolating the electrical grounds of both pieces of equipment, allowing only the audio signal to pass between them. This is especially crucial when one of the pieces of equipment is a computer sound card, where the electrical noise from the computer can get into the rest of the audio system.

The unit is also useful in the event that two pieces of equipment are DC coupled. If both input and output are DC coupled, the signal can easily distort, break-up, or simply disappear. The Pureformer safely isolates any combination of AC and DC coupled inputs and outputs.

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"So easy!...Removes hum...Naturally, at higher frequencies the threshold was higher, reaching 570 mV at 40 Hz and a decent 2.1 V at 100 Hz....The Pureformer did the job all right--the hash was at least 10 or 15 dB lower--but I started hearing really nasty distortion on music with even moderate levels of bass."

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Top Highlights

  • For Use with Line-Level Audio Equipment
  • Works with Computer Sound Cards
  • Reduces Hum & Noise
  • Removes Ground Loops & DC Paths
  • Isolates & Mitigates Electrical Grounds
  • Isolates AC & DC Coupling
  • Uses 600-Ohm Audio Transformers
  • No Power Required
  • Die-Cast Aluminum Contruction

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$65.55
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The ISOXL from Whirlwind is a compact line-level isolation transformer that provides an easy way to isolate an audio line when a quick fix is needed. The unit has XLR male and female connectors, and the shield is lifted from input to output.
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"Works great!...Pretty good....This Transformer is another great piece of gear to add to your supply....A must have for videographers!"

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  • Compact Design
  • XLR Male/Female Connectors

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$48.00
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The Allen-Avionics VIT-75 video isolation transformer is designed to eliminate hum caused specifically by ground loops. The VIT series is designed to eliminate these problems by breaking the ground connection. It also has the ability to deal with noise problems caused by large voltage potential differences up to 500 VDC.
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"works great!...Stable conditions...This is a wonderful hum eliminator that weighs much less than other hum eliminators and is relatively low cost....It's a cheap and effective fix."

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Expected availability: 7-14 business days
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$119.95
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The Allen Avionics HD-VIT-75 Video Isolation Transformer eliminates hum in HD-SDI transmission lines. It provides electrical isolation between the input and output and also eliminates induced currents in long cable runs. This device is useful for broadcast systems where hum is present due to ground loops or where there are large differences in ground potential.
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"Put these isolators on my main outputs and everything works great!"

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Top Highlights

  • Eliminates Hum in HD-SDI Lines
  • Provides Electrical Isolation
  • Eliminates Induced Currents
  • Equivalent to Less than 20 ft of Cable
  • More than 60 dB of Ground Loop Isolation
  • Gold-Plated BNC Connectors
  • 75 Ohms Balanced with 3.0 GHz Bandwidth
  • More than 15 dB Return Loss till 1.5 GHz
  • 2 kV Flash Tested

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Expected availability: 2-4 weeks
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$149.95
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Great for studio, stage, or broadcast applications, the RapcoHorizon ISO BLOX is an in-line isolation transformer, which offers musicians and engineers a quick fix for removing unwanted ground-loop hum between a microphone and a mixing board. The unit features XLR connectors at both ends and inconspicuously fits into your signal path, retaining a 600-Ohm load and source impedance, without adding or losing signal level.
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"Nice device...Highly Recommend...Nice device for protecting equipment from global phantom power....No fried electronics from powering line outs."

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Top Highlights

  • Removes Ground-Loop Hum
  • For Use on Microphone Lines
  • Stage, Studio, Broadcast Applications
  • 1-to-1 Level Matching
  • 600-Ohm Load
  • Compact, Rugged Design
  • XLR Connectors

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$27.50
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The Allen-Avionics AGL-600-2 transformer is used between two pieces of audio equipment that experience noise problems of hum, buzz, noise or unbalanced lines. It accomplishes noise elimination by using circuitry to extend audio bandwidth and reposition chassis shields and audio grounds.
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"Works as advertised....Seems pricier than others but works as advertised....I am going to get another to isolate computer from rack."

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Expected availability: 7-14 business days
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$255.00
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The Kramer TR-1 is a video isolation transformer; this unit isolates the video, providing an interferance (noise) free signal. It accepts composite video on a BNC connector.
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"Good Product...Handy and great performance"

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Expected availability: 7-10 business days
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$120.00
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The Allen-Avionics AGL-600 transformer is used between two pieces of audio equipment experiencing noise problems of hum, buzz or unbalanced lines. It accomplishes noise elimination by using circuitry to extend audio bandwidth and reposition chassis shields and audio grounds.
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"I will buy this product again as needed."

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  • 3-Pin XLR Connectivity
  • 300KHz Bandwidth

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Expected availability: 7-14 business days
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$127.50
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The Datavideo DAC-80 Audio Isolation Transformer is designed to remove hum and buzz created by ground loops. Normal voltage differences in the system grounding points between different pieces of equipment cause small AC power currents to flow in the shield of audio cables. Capacitance between a power transformer's primary and secondary windings introduce signals to the circuit ground, which will also create small current flows in the cable shield. Either of these problems will create hum in audio signals. The DAC-80 breaks the inter-equipment ground path and greatly increases the rejection in the input circuits while remaining transparent to the audio signal.
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Expected availability: 7-14 business days
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$109.00
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The Smart App Online Series 2U Rack/Tower Step-Down Isolation Transformer from CyberPower converts 208V input voltage originating from utility power, a UPS, or a generator to 120V output. The 6-foot long cord with a 30A NEMA L6- 30P plug that connects the unit to input power. Over temperature protection safeguards your unit from damage if the internal heat exceeds safe operating parameters. This step-down transformer has a capacity of 5000VA / 5000W at 120V. It features twelve NEMA 5-20R receptacles that can support output to NEMA 5-15P and 5-20P plugs.
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Expected availability: 3-7 business days
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$1,349.99
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Expected availability: 2-4 weeks
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$1,649.00
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Allen-Avionics VIT-753

Usually video isolation involves breaking the ground in transmission lines to eliminate the 60 Hz hum; when there are high voltage potentials involved (above 20 VDC) the VIT series isolation transformers are the devices to use. The dialectric withstanding voltage of the VIT series is over 500 VDC. There is no DC path between transformer windings, therefore accomplishing true isolation.

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Expected availability: 7-14 business days
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$334.95
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Allen-Avionics VIT-50

Usually video isolation involves breaking the ground in transmission lines to eliminate the 60 Hz hum; when there are high voltage potentials involved (above 20 VDC) the VIT series isolation transformers are the devices to use. The dielectric withstanding voltage of the VIT series is over 500 VDC. There is no DC path between transformer windings, therefore accomplishing true isolation.

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Expected availability: 7-10 business days
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$159.95
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The AGL-10K transformer is used between two pieces of audio equipment that experience noise problems of hum, buzz, noise or unbalanced lines. It accomplishes noise elimination by using circuitry to extend audio bandwidth and reposition chassis shields and audio grounds.
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Expected availability: 7-10 business days
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$134.95
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The TX-8i Headphone Isolation Transformer from RDL is a device that isolates headphones from source equipment. It can drive headphones with an impedance of 8Ω or greater and features galvanic isolation. The transformer's LED flashes if its operating level has been exceeded.
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Expected availability: 7-10 business days
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$63.95
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B&H # RDTXAT1 MFR # TX-AT1

The RDL TX-AT1 Audio Isolation Transformer is a single channel device that converts unbalanced audio to professional balanced audio. The TX-AT1 features binding-post connections and is an ideal choice for recording and sound reinforcement applications.
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  • Unbalanced to Balanced Transformer
  • Single Channel

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Expected availability: 3-7 business days
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$86.49
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The TR-1A Balanced Mono Audio Isolation Transformer from Kramer is designed for use with balanced mono audio signals. This unit provides complete isolation between devices, thus eliminating hum, ground loops, and DC offsets that can degrade audio quality. It is well suited for use in broadcast and production facilities, staging & field work, duplication studios, and other similar settings and uses.

The transformer features external input and output ground terminals. Moreover, grounding options can be selected with a dip switch. The unit receives power passively and no power supply is required. It belongs to the Kramer TOOLs family of products and up to (3) units can be mounted side by side in a standard 19" equipment rack by using the optional RK-3T rack kit.
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Top Highlights

  • Audio Isolation Transformer
  • Balanced Mono Audio
  • External Input & Output Ground Terminals
  • Passive Power
  • Standalone or Rackmount Use

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Expected availability: 7-14 business days
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$76.00
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The TR-2A Balanced Stereo Audio Isolation Transformer from Kramer is an audio isolation transformer designed for use with balanced stereo audio signals. This unit provides complete isolation between devices, thus eliminating hum, ground loops, and DC offsets that can degrade audio quality. It is well suited for use in broadcast and production facilities, staging & field work, duplication studios, and other similar settings and uses.

The transformer features external input and output ground terminals. Moreover, grounding options can be selected with a dip switch. The unit receives power passively and no power supply is required. It belongs to the Kramer TOOLs family of products and up to (3) units can be mounted side by side in a standard 19" equipment rack by using the optional RK-3T rack kit.
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Top Highlights

  • Audio Isolation Transformer
  • Balanced Stereo Audio
  • External Input & Output Ground Terminals
  • Passive Power
  • Standalone or Rackmount Use

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Expected availability: 7-14 business days
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$116.00
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The TR-3 Video & Balanced Stereo Audio Isolation Transformer from Kramer is designed for use with composite video and balanced stereo audio signals. This unit provides complete isolation between devices, thus eliminating hum, ground loops, and DC offsets that can degrade video and audio quality. It is well suited for use in broadcast and production facilities, staging & field work, duplication studios, and other similar settings and uses.

The transformer features external input and output ground terminals. Moreover, grounding options can be selected with a dip switch. The unit receives power passively and no power supply is required. It belongs to the Kramer TOOLs family of products and up to (3) units can be mounted side by side in a standard 19" equipment rack by using the optional RK-3T rack kit.
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Top Highlights

  • Video & Audio Isolation Transformer
  • Composite Video
  • Balanced Stereo Audio
  • External Input & Output Ground Terminals
  • Passive Power
  • Standalone or Rackmount Use

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Expected availability: 7-10 business days
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$184.00
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The Crown Audio IST is a 600-ohm Isolation Transformer for telephone output or input 1 for use with the 135mAh or 160mAh Commercial Amplifiers.
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Expected availability: 7-14 business days
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$55.00
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