JK Audio CellTap 4C User Manual

JK Audio

CellTap 4C

™

Wireless Phone Audio Tap

User Guide

ii

CellTap 4C Wireless Phone Audio Tap

Welcome

Thank You

Thank you for purchasing the
JK Audio CellTap 4C™. 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)

Email us at: [e-mail]

Or, check out our FAQ section for
answers to common questions.

Limited Warranty

CellTap 4C is covered by a 2 year
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 modications,

or damages occurred in shipping, only
defective workmanship or materials.

There are no expressed or implied
warranties which extend beyond
the warranty here made.

Safety Precautions

iii

Safety Precautions

RF Noise

Wireless phones generate substantial
radio frequency (RF) noise during a
call which can easily leak into audio
cables or equipment. Be sure to keep
the wireless phone 1-2 feet away from
any audio cables or equipment. It is
also important to keep the wireless
adapter cord away from any other

audio cords.

Road Safety

Never use headphones while driving
or cycling, etc. It can be dangerous
to turn up the volume even while
walking. Doing so may hinder your
hearing and can be hazardous on the
roadways or at pedestrian crossings.

WARNING!

There are many laws that prohibit the
recording of telephone conversations
without prior consent from both
parties. Be sure to check the laws in
your area.

Note: While CellTap 4C was designed
to be very rugged and durable, it is not
waterproof and care should be taken to
keep the unit dry.

iv

CellTap 4C Wireless Phone Audio Tap

Setup vi

Overview 1

Conguration 2

FAQs 4

Technical Information 5

Contents

Features

v

Features

HD Voice*

3.5 mm TRRS Headset Jack

3.5 mm TRRS Cable to Device

3.5 mm TRS Stereo Mic Level Output
to Recorder

Screwdriver Caller Level adjustment

Switch Selects Between Popular

TRRS Congurations

Passive, no AC or Battery
Power Needed

Features

* HD Voice.

While standard phone calls have a narrow bandwidth of 300 Hz to 3.4 kHz, HD Voice calls

offer 50 Hz to 7 kHz bandwidth. The additional 1.5 octaves on the low end gives voice a

more natural sound, while the additional upper octave dramatically improves speech clarity

and intelligibility.

To take advantage of this extended bandwidth, both phones on the call must support HD
Voice, and both phones must be on the same carrier, in coverage areas that support

HD Voice.

vi

CellTap 4C Wireless Phone Audio Tap

Setup

Connect to a laptop,
recorder, mixer or PA system
with a 3.5mm stereo cable.

Connect to your smart phone
using the supplied CN150.

Connect your earbud headset.

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MIC

Overview

1

Overview

Introducing CellTap 4C

CellTap 4C™ is an interview-recording adapter that connects between your
existing earbuds/headset and cell phone, providing stereo output to a recorder or
mixer.

CellTap 4C™ is compatible with most smart phones, tablets, and notebooks that
use the 3.5 mm 4-conductor TRRS headset jack. Simply connect CellTap 4C
between your existing ear-bud headset and phone, and then connect the stereo
output to a mic level input on your recorder or mixer. The transformer coupled
stereo output provides the local mic on the left channel and the caller on the
right channel. Local audio is a full bandwidth connection, meaning your voice will
sound considerably better than the caller. Of course, audio quality is limited by
the quality and placement of the microphone on the ear-bud style headset.

CellTap 4C™ will not interfere with headset button controls on most devices. A
headset is required for operation, as the phone will not recognize CellTap 4C
without a headset connected.

2

CellTap 4C Wireless Phone Audio Tap

Conguration

TRRS Congurations

If the headset is not working properly, try changing the TRRS conguration. To

switch the standard, disconnect all cables, open up your CellTap 4C by removing

the cover, ip the switch and close it back up. The internal switch supports the

following wiring standards:

Standard T R1 R2 S

A:

OMTP Left Output Right Output Mic Ground

B:

AHJ (Default) Left Output Right Output Ground Mic

C:

AHJ (Alternate) Left Output Right Output Ground Mic

OMTP: Open Mobile Terminal Platform, AHJ: American Headset Jack.

The A setting is wired for the Original Nokia standard. The B and C settings are
wired the same and are used on most phones. The C setting reduces noise on
many Smartphones. However, this position may potentially disable music/phone
controls on the iPhone and other phones. Use (default) Position B for the iPhone
or any phone or device that experiences trouble with music/phone controls under
position C.

Phones are continuously changing so trial and error may be the best method to
determine which position is best for your particular phone.

Conguration

3

Conguration

ABC

Caller Level

Trim Pot

TRRS Conguration Switch

Caller Level Trim Pot

Caller Level Trim Pot adjusts the level of Caller audio on your recordings. This
adjustment lets you more closely match the level of your voice to the caller' voice.
This ratio will likely remain the same after the initial adjustment.

4

CellTap 4C Wireless Phone Audio Tap

I am getting noise on
my recordings. How can I
stop this?

Some phones simply generate too
much Radio Frequency (RF) energy
to allow a clean recording. In some
cases, even a phone that normally
produces little or no noise on a
recording may produce higher levels
of noise due to the environment. A
wireless phone must increase its
transmit power when signal strength
weakens. This may occur in vehicles
and large buildings, as well as rural
areas.

1) Check the User Guide for
instructions on adjusting the internal
headset type switch.

2) Try positioning cables and your
recorder away from the phone.

Will CellTap 4C work with any
cell phone?

CellTap 4C has been tested with many
popular brands and model phones that
use the 3.5 mm 4-conductor TRRS
style headset. However, there are
no industry standards, so we cannot
promise compatibility with any brand
or model phone.

FAQs

5

Output

1/8” (3.5mm) Stereo: 600 ohms, 2.4 mV RMS (-50 dBu nom.)

MISC

Size: 2” x 2” x 1.3” (5.1 x 5.1 x 3.3 cm)

Weight: 3.5 oz

Specications

Technical Information

Technical Information

JK Audio

JK Audio, Inc.
1311 E 6th St.
Sandwich, IL 60548
United States
Telephone: [phone]
Toll Free: 1.800.jkaudio
Fax: [phone]
www.jkaudio.com

© 2015 JK Audio, Inc. All rights reserved.

CellTap 4C

™

Wireless Phone Audio Tap

User Guide Version 5/12/15