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JK Audio Pureformer - Stereo Isolation Transformer

  • Price: $56.05
  • B&H # JKPUR
  • Mfr# PUR

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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.

Compact interface for removing hum and noise between any two pieces of audio equipment
Especially useful when hooking up on-board computer sound cards with other audio equipment
Pureformer can also help when input/output incompatibilities exist
Utilizes high-quality, low-distortion, 600Ω audio transformers
Durable die-cast aluminum construction
Frequency Response 20Hz to 20kHz, +/-0.1dB
Inputs 2 x RCA
Outputs 2 x RCA
Input Impedance 600Ω
Output Impedance 600Ω
Insertion Loss 0.8dB
Isolation 1500VRMS
Dimensions (WxDxH) 3.6 x 1.3 x 1.8" (91 x 33 x 46mm)
Weight 5 oz (142 g)

REVIEW SNAPSHOT®

by PowerReviews
JK Audio Pureformer Isolation Transformer
 
5.0

(based on 8 reviews)

Ratings Distribution

  • 5 Stars

     

    (8)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (8)
  • Good audio (8)
  • Compact (7)
  • Lightweight (5)
  • Versatile (4)

Cons

    Best Uses

    • Amateur recording (4)
    • Home studio (4)
    • Outdoor events / games (4)
    • Performances (3)
      • Reviewer Profile:
      • Experienced (7)

    REVIEWS

    Reviewed by 8 customers

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    Displaying reviews 1-8

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    5.0

    Top shelf performance, budget price!!

    By Hi-Fi Lover

    from Florida

    About Me Experienced

    Verified Buyer

    Pros

    • Clear Sound
    • Compact
    • Durable
    • Easy To Use
    • Lightweight
    • Versatile

    Cons

      Best Uses

        Comments about JK Audio Pureformer Isolation Transformer:

        I have a high-end audio system that somehow developed a ground loop. I initially tried a cheaper device from another retailer and manufacturer that also eliminated the ground loop, but I noticed a marked reduction in sound quality. With over $10k invested in my components, this was not acceptable. I researched this item and noticed its negligible insertion loss and performance over the audio spectrum. I will eventually try to solve the ground loop issue at its root, but with the Pureformer's outstanding performance I don't need to rush! If you spend more for another device it's simply because you want to, not because you have to!

        Comment on this review

        (1 of 1 customers found this review helpful)

         
        5.0

        JK Audio Stereo Isolation Pureformer

        By Tronman

        from Phoenix, AZ

        About Me Experienced

        Verified Buyer

        Pros

        • Clear Sound
        • Compact
        • Easy To Use
        • Lightweight
        • Versatile

        Cons

          Best Uses

          • Amateur Recording
          • Events
          • Home Studio
          • Mobile DJ
          • Performances
          • Professional Recording

          Comments about JK Audio Pureformer Isolation Transformer:

          Works Beautiful!!! Had a Hafler P7000 350w/Ch Amp with ground loop noise issues. Tried Radio Shack equivalent which worked but had low end roll-off and was using Amp as a Sub Amp so that was no good. Put this in line ground loop GONE and Silence had returned with no degradation in Audio Freq 20hz-20Khz Nice!!! Well worth it if you need the BEST and the complete audio spectrum for your equipment.

          Comment on this review

          (1 of 1 customers found this review helpful)

           
          5.0

          Removes hum

          By ChrisP

          from Pittsburgh, PA

          About Me Experienced

          Verified Buyer

          Pros

          • Clear Sound
          • Compact
          • Easy To Use

          Cons

            Best Uses

              Comments about JK Audio Pureformer Isolation Transformer:

              I use this ground loop isolator to remove the hum when connecting a laptop's headphone output to my stereo amplifier.
              Build quality seems good, and I have noticed no loss of signal intensity and no distortion.
              I used a $10 isolation transformer before, but that had poor-quality connectors plus distortion.

              Comment on this review

               
              5.0

              It did what I needed it to do

              By Durnick

              from San Diego, CA

              About Me Experienced

              Verified Buyer

              Pros

              • Clear Sound
              • Compact
              • Easy To Use
              • Lightweight

              Cons

                Best Uses

                  Comments about JK Audio Pureformer Isolation Transformer:

                  I had a bad hum when I connected my computer soundcard to my home stereo. This took it right out. Nice solid construction too.

                  Comment on this review

                  (1 of 1 customers found this review helpful)

                   
                  5.0

                  So easy!

                  By Televisionguy

                  from Boynton Beach, FL

                  About Me Experienced

                  Verified Buyer

                  Pros

                  • Clear Sound
                  • Compact
                  • Easy To Use
                  • Lightweight
                  • Versatile

                  Cons

                    Best Uses

                    • Amateur Recording
                    • Events
                    • Home Studio
                    • Mobile DJ
                    • Performances

                    Comments about JK Audio Pureformer Isolation Transformer:

                    It's so easy to install...take it out of the package and connect it. Does the job!

                    Comment on this review

                    (1 of 1 customers found this review helpful)

                     
                    5.0

                    Works great!

                    By homeStudio

                    from San Jose, CA

                    About Me Experienced

                    Verified Buyer

                    Pros

                    • Clear Sound
                    • Easy To Use

                    Cons

                      Best Uses

                      • Amateur Recording
                      • Home Studio

                      Comments about JK Audio Pureformer Isolation Transformer:

                      Solves the digital noise issues between my computer's sound card and my audio interface without degrading frequency response.

                      Comment on this review

                      (1 of 1 customers found this review helpful)

                       
                      5.0

                      Soundcard Trash Eliminated!

                      By THE PERFESOR

                      from Rochester ny

                      About Me Experienced

                      Verified Buyer

                      Pros

                      • Clear Sound
                      • Compact
                      • Easy To Use
                      • Lightweight
                      • Versatile

                      Cons

                      • Need 35mm jacks too

                      Best Uses

                      • Events

                      Comments about JK Audio Pureformer Isolation Transformer:

                      For those of you that use your laptop for demonstrations, in my case, specifically audio, you never know what you will get as far as noise added.
                      Even apple laptops generate trash via audio out when hooked up to external systems. Being an audio engineer I needed a reliable transformer to isolate these issues and the JK Pureformer was inexpensive and does the trick. Adding 3.5mm jacks in parallel would be even better but for the price and a couple of decent cables it does the job. Problem is, everyone one wants to borrow this. I tell them to get there own. I can now turn things up and not hear that annoying laptop trash buzzing in the house.

                      Comment on this review

                      (1 of 1 customers found this review helpful)

                       
                      5.0

                      Fantastic noise filter

                      By The Outlaw Jammin' Jay

                      from Waitsfield, VT

                      About Me Novice

                      Verified Buyer

                      Pros

                      • Clear Sound
                      • Compact
                      • Easy To Use

                      Cons

                        Best Uses

                        • Amateur Recording
                        • Events
                        • Home Studio
                        • Performances

                        Comments about JK Audio Pureformer Isolation Transformer:

                        I'm using this product between my laptop and a sound board to filter out the audio noise coming from my laptop's line out port. It is a simple install and does what it says it will.

                        Comment on this review

                        Displaying reviews 1-8

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                        Cables

                        Pearstone -  2 RCA Male to 2 RCA Male Audio Cable (3')
                          • Original: $4.99
                          • Save: $0.50
                        • Price: $4.49
                         

                        What's in the Box

                        JK Audio Pureformer - Stereo Isolation Transformer
                        • Two (2) Year Warranty
                         
                         
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