JK Audio Pureformer User manual
JK Audio
Pureformer™
Stereo Isolation Transformer
User Guide
ii Pureformer Stereo Isolation Transformer
Welcome
Thank You
Thank you for purchasing the
JK Audio Pureformer™. Please read
this guide for instructions on using it.
Getting Assistance
If you have technical or application
questions:
In the US & Canada, call us toll free
at: 800-552-8346
All other countries dial: 815-786-2929
(M-F 8:30-5:00pm Central Time Zone)
Or, check out our FAQ section for
answers to common questions.
Limited Warranty
Pureformer is covered by a 1year
warranty to be free from defective
workmanship and materials. To obtain
service, contact JK Audio by phone
or email for return authorization.
Once authorized, you will carefully
pack and ship the faulty product and
all accessories to us. You will pay
for shipping to us and we will pay for
return back to you.
This warranty does not cover
damages due to accident, weather,
re, ood, earthquake, misuse,
unauthorized repairs or modications,
or damages occurred in shipping, only
defective workmanship or materials.
There are no expressed or implied
warranties which extend beyond
the warranty here made.
Contents iii
Overview 1
FAQs 2
Technical Information 3
Contents
Note: While Pureformer was designed to be very rugged and durable, it is not waterproof
and care should be taken to keep the unit dry.
iv Pureformer Stereo Isolation Transformer
Line In Line Out
Just Insert Between your Sound Card and your Audio Mixer or Amplier
High-Quality, Low-Distortion, 600 ohm Audio Transformers
Features
Overview 1
Introducing Pureformer
The Pureformer provides hum and noise reduction for sound cards and audio
equipment, and removes ground loops and DC paths that can cause hum and
signal breakup.
Isolate the Problem
The Pureformer isolates the electrical grounds of two pieces of audio equipment.
This is especially important in the case of computer audio cards connected to
high quality/low noise audio equipment. The computer electrical ground is often
lled with noise from disk drive activity and data transmission.
Many audio cards use the same electrical ground for the computer and the audio
signal. When the computer audio card is connected to your studio equipment, the
electrical noise from the computer can leak into the rest of your audio system.
The Pureformer completely isolates the electrical ground of the two systems and
only allows audio signals to pass through. Pureformer cannot remove noise once
it has been mixed with the audio signal, so it is important to nd and treat the
source of each problem.
Overview
Pureformer Stereo Isolation Transformer
FAQs
Will the Pureformer eliminate the 60 cycle AC hum I have on my
recordings?
No. The Pureformer cannot remove noise after it has already entered the audio
signal. It will only prevent noise from entering before the recording takes place.
2
Technical Information 3
Line In
RCA: 600 ohms, 250 mV RMS (-10 dBu nom)
Line Out
RCA: 600 ohms, 250 mV RMS (-10 dBu nom)
Misc.
Frequency Response: 20 Hz-20 kHz, ± 0.1 dB
Insertion Loss: 0.8 dB
Size: 3.6" x 1.8" x 1.3" (9.2 x 4.6 x 3.3 cm)
Weight: 5 oz
Specications
Technical Information
Pureformer™
Stereo Isolation Transformer
User Guide Version 4/16/22
JK Audio, Inc.
1311 E 6th St.
Sandwich, IL 60548
United States
Telephone: 815.786.2929
Toll Free: 1.800.jkaudio
Fax: 815.786.8502
www.jkaudio.com
© 2022 JK Audio, Inc. All rights reserved.
JK Audio
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