JK Audio RemoteMix Sport User Manual

Warranty

RemoteMix Sport is covered by a two year warranty to be
free from defective workmanship and materials. In the event
that the RemoteMix Sport needs repair, you must call us to
get an authorization, and then carefully pack and ship it to us.
You will pay for shipping to us and we will pay for return back
to you, UPS ground. No free repairs will be made if the
defect was caused by misuse, weather conditions, or other
cause, except for defective workmanship or materials.
THERE ARE NO EXPRESSED OR IMPLIED WARRANTIES
WHICH EXTEND BEYOND THE WARRANTY HERE MADE.

RemoteMix Sport

Phone Line Hybrid and

Telephone Handset Interface

for Remote Broadcasts

03/07

JK Audio, Inc. 1311 E 6th Street, Sandwich, IL 60548 USA

Voice: [phone] Toll Free: 800-JK-Audio Fax: [phone]

[e-mail] www.jkaudio.com

Copyright © 2007 JK Audio, Inc. All Rights Reserved.

User Guide

JK Audio

Connection

FCC Registration (continued)

RemoteMix Sport is a professional audio mixer designed to work
on any standard analog telephone line or you can unplug the hand­set on most PBX or digital telephones and connect the phone to
the built-in universal handset interface. It can also connect to many
digital cellular telephones using the specially designed cell phone
interface cable supplied with the unit.

Simply plug your audio equipment into RemoteMix Sport and con­nect to a phone line. You can now put on your headphones, plug in
a microphone and you are ready to broadcast the game or talk up
a taped interview. The balanced XLR line output jack provides a
high quality connection to mixers and professional tape gear.

Microphones,
3 XLR jacks

be unplugged from the modular outlet until the problem has
been corrected. Repairs to this telephone equipment can only
be made by the manufacturer or its authorized agents or by
others who may be authorized by the FCC. For repair
procedures, follow the instructions outlined under the warranty
section of the manual.

4. Rights of the telephone company

If telephone equipment is causing harm to the network, the

telephone company may temporarily discontinue your
telephone service. If possible, they'll notify you before they
interrupt service. If advanced notice isn't practical, you'll be
notified as soon as possible. You'll be given the opportunity to
correct the problem, and you'll be informed of your right to file
a complaint with the FCC.

Your telephone company may make changes in its facilities,

equipment, operations or procedures that could affect the
proper functioning of your JK Audio product. If such changes
are planned, you'll be notified by your telephone company.

to RJ-11 wall jack

1/4” Headphone
Cue input / wireless
telephone interface

Headphones or small
speaker, 3 jacks 1/4”
stereo or mono

FCC Part 15 Compliance

This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection

Audio equipment
XLR input or output

against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own
expense.

Changes or modifications not expressly approved by JK Audio can
void the user's authority to operate the equipment.

2

15

FCC Registration

Operation

Your new JK Audio product has been registered with the Federal
Communications Commission (FCC). This product complies with
the standards in Part 68 of the FCC rules.

1. Connection and use with the nationwide telephone

network

The FCC requires that you connect this telephone equipment

to the national telephone network through a USOC RJ-11C
modular telephone jack.

This equipment may not be used with Party Line Service or

Coin Telephone Lines.

This equipment is hearing aid compatible.

2. Information for the telephone company
Upon request from your local telephone company, you are

required to provide the following information:

a) The "line" to which you will connect the telephone

equipment (that is, your telephone number), and

b) The telephone equipment's FCC registration number.

This can be found on the bottom of your t e l ephone
equipment, and,

c) The ringer equivalence number (REN) for this

equipment. The REN is used to determine the quantity of
devices which will be connected to the telephone line.
Excessive RENs on the telephone line may result in the
devices not ringing in response to an incoming call. In most,
but not all areas, the sum of the RENs should not exceed 5.0.
To be certain of the number of devices that may beconnected
to the line, as determined by the total RENs, contact the local
telephone company.

3. Repair Instructions
If it is determined that your telephone equipment is

malfunctioning, the FCC requires that it not be used and that it

1. Connect your audio equipment, microphones, cue input, and
headphones to the input and output jacks on RemoteMix Sport.

2. (a) Connect the jack marked "Phone Line" to any standard

analog telephone line, or

(b) Disconnect the handset on an existing telephone and plug

the coily cord from the phone into the PBX handset
interface jack on RemoteMix Sport, or

(c) Connect Wireless Phone Interface jack to the headset jack

3. Turn on the power switch, flip the "Phone Line" switch to "Dial/

on your cellular phone using the supplied cable.

Talk", flip the keypad switch to “On” (only if dialing with the Re­moteMix Sport keypad) and dial your call. You are now ready
to broadcast or record a telephone interview

.

2. (b) Handset jack on PBX

telephone. Set A-B-C switch
for best audio.

OR

2. (c) Cell Phone con-

nection using wireless
phone cable provided

OR

Handset optional. Can
be used to set up a call.

2. (a) Standard analog telephone line

14

3

Operation (continued)

Specifications

Wireless / Cellular Telephones

RemoteMix Sport units purchased after February 15, 2001 come
equipped with a cellular telephone interface built into the 1/4” Cue
Input. This 1/4” wireless interface accepts a special 1/4” to 2.5 mm
cable provided with the unit. This interface will work with any wire­less phone that can accept standard third party headsets and ear­piece headsets. Some wireless telephones have the standard 2.5
mm jack while others have proprietary jacks. Adapters to convert
the proprietary jack to the standard 3-conductor 2.5 mm jack are
available for most wireless telephones through their dealers, local
electronic stores or many internet stores.

When using the wireless interface, it is important to keep your
wireless telephone 12” - 24” away from the RemoteMix Sport and
any microphone or headphone cables. This will help prevent un­wanted RF noise from entering the unit.

The wireless interface on the RemoteMix Sport works very well
with most cellular telephones. However, some wireless telephones
generate excessive RF noise which can be can be heard as a
“chattering” or “motor boat” sound. The noise from these particular
telephones will be unacceptable for most broadcast applications.

RemoteMix Sport may also be used with wireless analog (bag)
telephones in conjunction with their proprietary fax / modem adapt­ers. In this instance the fax / modem adapter replaces the RJ-11
wall jack shown on page 2.

Tone / Pulse Dialing
RemoteMix Sport is equipped with a switch to select tone (DTMF)
dialing or pulse dialing. The switch is located underneath the
battery door. With the switch towards the volume control knobs,
the unit is in the “pulse” mode. When in “pulse” mode the “*” key
will set the unit to transmit digits as tones regardless of the switch
position. To return to pulse dialing, turn the keypad off and back
on.

Inputs:
Microphone: Female XLR, 1k ohms, -10 mV RMS
(-35 dBm nom.)
Mic 1 has a Mic / Line pad switch,
Line = +5 dBm nominal

Cue Input: 1/4", 50 ohms, 250 mV RMS
(-10 dBm nom.)

Handset: Auxiliary Handset jack, biased for electret

microphone type handset.

Outputs:
Balanced: Male XLR, 200 ohms, 500 mV RMS
(+12 dBm Max.)

Headphone: 1/4" Stereo, 8 ohms, 1/2 watt per channel

Phone Line: RJ-11C, Isolation 1500 VAC
Ringer: 1.2B REN
Handset Interface: RJ-22 PBX Handset Interface biased for

Electret, Dynamic, and Carbon handsets.

Keypad: DTMF (Dual Tone Multi Frequency) / Pulse

switchable.

Size: 6.5 x 4.6 x 2.2 inch
(16.5 x 11.7 x 5.6 cm)

Weight: 2.5 pounds

4

13

Hybrid Null Adjustment (optional)

Operation (continued)

The receive side of RemoteMix Sport has a hidden fine tuning
control which is adjusted by inserting a small flat blade screwdriver
into the back of the unit just below the words Null Adj. and turning
left or right. This is a ten-turn potentiometer. This adjustment
controls the level of transmit audio that appears on the receive
audio jacks. The null circuit matches the characteristics of
RemoteMix Sport with the characteristics of the telephone line.
Although much of the transmit audio can be removed, this is not
the equivalent of a mix-minus output.

The amount of transmit/receive isolation will depend on the quality
of the telephone line. This circuit is factory set to give a good mix
on an average telephone line, and is therefore perfect for recording
both sides of a telephone interview.

To find the absolute null for any telephone line, follow this
procedure:

1. Place a call to a quiet location.

2. Send a signal down the line at moderate levels, this can be a
pre-recorded tape of music or speech, or preferably a test
signal.

3. Connect the Receive line output to a meter or scope, or listen
to the receive signal over the headphones. Be sure to turn up
the From Phone or Headphones volume control depending on
which method you are using to monitor the receive signal.

4. On the back of RemoteMix Sport, below the words Null Adj.,
there is a hole for a small flat blade screwdriver. This is a 10­turn potentiometer to allow for very sensitive adjustments. Try
to remember the position of the blade, and the number of turns
you are making as you first adjust clockwise, and then back to
the original position, and then counterclockwise. The goal is to
adjust the null pot until the receive signal contains a minimum
amount of transmit audio. However, if you want a good mix of
transmit and receive signals, you must have someone on the
far end speak or send audio down the line as you adjust for the
proper balance.

To Reset Null to Factory Setting:

Disconnect from phone line, switch the Phone Line switch to On
Hook, and the set the null to minimum. This presets the null to an
average phone line impedance.

Handset Interface

If you do not have access to an analog phone line or if the phone
system is a digital or analog PBX, ISDN, or a key telephone
system, you can use the built-in handset interface. Disconnect the
telephone handset from the coily cord and plug the cord into the
RemoteMix Sport PBX Handset Interface Jack. Now select the
handset type on the 3 position switch.

Trial and error works faster than a chart of handset types, but this
basic description may help.

Switch Position Handset Microphone Type
A Electret
B Dynamic
C Carbon

Talkback Feature

A built in speaker lets you monitor the phone line during call setup
and station breaks. The monitor speaker volume is controlled by
the headphone volume control and has an additional on / off switch
(near the A-B-C switch). An internal push-to-talk microphone (see
page 9) also helps when setting up your call. The speaker
switches off when the microphone button is pushed on to prevent
feedback.

12

5

Operation (continued)

FAQs

XLR Output

This fixed level male XLR output also includes a switch for Phone
Mix or Mic Mix. If you are using the 1/4” cue input / wireless inter­face for your telephone connection, the far side of the call will not
be present on the XLR output. To obtain a signal containing both
sides of the conversation while using this setup, one of the 1/4”
headphone jacks must be used.

Fixed level
output

Mic/Line level
switch for
Input 1 only

1/4” Cue Input / Wireless Interface

The RemoteMix Sport includes a 1/4” Cue Input that feeds only the
headphones. Connect any 50 ohm output to this jack, such as the
headphone out from your personal audio player. This signal does
not reach the XLR output.

This same 1/4” jack is also an interface for your wireless tele­phone. By using the special 1/4” - 2.5 mm cable provided with your
unit, you can interface to most wireless telephones that accept
third party earpiece / headsets. This 1/4” - 2.5 mm cable is not sim­ply an adapter cable and should not be used with other equipment.
The wiring configuration is different from other TRS to TRS cables.
The “tip” and “ring” portions of this cable are reversed in order for
the interface to work properly. Possible damage to your equipment
could result from misuse of this cable.

Headphones

The built-in headphone amplifier is strong enough to power three
pairs of headphones or a small desktop speaker. The left and right
channels contain the same mono signal, but are powered by
separate amplifier channels. These jacks will drive either three 1/4"
stereo plugs or three 1/4" mono plugs.

6

? Why doesn't my RemoteMix Sport ring when a call comes in?
! The audible ringer found on other RemoteMix units was replaced

with a visual ring indicator on the RemoteMix Sport. It is a red LED
that flashes when a call comes in. The indicator is located next to
the keypad toggle switch on the volume control panel.

? Will your RemoteMix Sport provide phantom power for my

condenser microphone?

! No, our devi ces will not provide phantom power. If you are connect-

ing your microphone directly to a JK Audio RemoteMix, you should
use a dynamic mic.

? How do I adjust the level of the balanced output on the Re-

moteMix Sport?

! The Balanced XLR output of the RemoteMix Sport is a fixed line

level output. If needed you should adjust the audio level at the input
of the device you are sending audio to.

? I've lost my power supply for my RemoteMix Sport unit. I have

another power supply that fits from a different product. Can I
use this instead?

! NO! Never use a power supply other than the one that was sup-

plied by your manufacturer. Power supplies are available in either
AC or DC output with many combinations of voltage and available
current. DC supplies carry either positive or negative center pin
output and may or may not be "regulated". If you connect a nega­tive center pin power supply to a positive center pin jack, it's just
like hooking up the battery cables to your car backwards. Obviously
you would not want to do this to your car or your expensive audio
equipment. "Regulation" is the tolerance to the specified voltage of
your DC power supply. All of our DC power supplies have a low
noise 5% tolerance. This means that our 9V DC power supplies will
always output 9 volts +/- 5%, whether you are using no power at all
or applying a full load. Most consumer power supplies are not regu­lated. A non-regulated 9V, 800mA power supply could actually out­put 16V until an 800 mA load is applied. This could invariably dam­age your equipment, and also create a great deal of noise. There is
also no standard for the size of your power jack. This means that a
16VAC power supply and a 1.5VDC power supply could both have
the same 2.1mm jack.

11

Operation (continued)

Power

RemoteMix Sport is powered by two 9 volt alkaline batteries located
under the cover on the bottom of the unit. Under normal use, you
should get at least 30 hours of continuous use from a fresh set of
batteries.

To test the batteries, simply press the Battery Test button on the front
of the unit. If the LED lights, the batteries are still good. The unit
may still function if the LED does not light, but there will be significant
audio distortion and a loss of level as the batteries continue to
discharge.

The batteries are wired in parallel so it is important to replace both at
the same time with identical batteries. If two fresh batteries are not
available, it is better to run using only one good battery. Since the
battery fixtures are wired in parallel, it does not matter which one gets
the single battery.

We also provide a high quality, regulated AC to DC adapter to power
RemoteMix Sport when AC power is available. Simply plug it into the
back of RemoteMix Sport and plug the transformer into a 110 VAC
wall outlet. When the power connector is inserted into the jack, the
batteries are bypassed. The AC adapter does
batteries. Make sure to use only the supplied AC power adapter

with the RemoteMix Sport. Using any other adapter may damage
the unit.

not charge the

FAQs

? The output from Mic 1 is very low but the other mics are fine.
! Check the position of the Mic/Line switch near Mic 1. This first input

can be switched to accept a line level signal from a mixer or other
equipment.

? Can I wire a stereo mini output to the XLR input of a Sport?
! Yes. You need to wire the tip to pin 2, the sleeve to pin 1, and leave

the ring and pin 3 floating. You should use the Mic 1 input since it is
mic/line switchable, and use Mic 2 and Mic 3 for additional mics.

? What kind of device can I connect to the Cue Input?
! The Cue Input accepts a signal from the headphone output jack of

any audio device such as a portable radio or MP3 player. The 50
ohm impedance is too low to be driven by most line level outputs.

Operation (continued)

Keypad ON / OFF
This switch
disables the
DTMF keypad to
prevent tones from
being blasted
down the phone
line during a
broadcast.

Send Side (To Phone Line)

There are separate volume controls for each of the three
microphone input jacks. You can use all three inputs at the same
time. Mic 1 also has a Mic/Line selector switch which lowers the
gain on the Mic 1 XLR jack by 30 dB to allow a balanced line level
input.

Receive Side (From Phone Line)
The receive side has separate controls for headphone cue input
level and main feed level. The Cue Input control adjusts the signal
going to the headphones from the 1/4” Cue Input. The Main Feed
control adjusts the headphone level of the three XLR inputs. This
does not adjust the XLR output. When using the 1/4” Cue Input
Wireless Interface, the Main Feed control adjusts the level of your
own voice in the headphones while the Cue Input control adjusts
the level of the person on the other side of the call in your head­phones. You should keep in mind that your wireless telephone also
has level control. If you are having level problems that cannot be
corrected with the controls on the RemoteMix Sport, try adjusting
the level on the wireless telephone itself.

Ringer

RemoteMix Sport does not have an audible ringer but there is a
visual ring indicator that will flash for incoming calls.

10

7

Operation (continued)

Handset Jack
The handset jack on the right side of RemoteMix Sport allows you
to plug in a telephone handset and quickly set up a call before you
set up your microphones and headphones. All telephone handsets
are different, so if yours is not compatible, try an AT&T, Sony, or
Radio Shack residential telephone handset.

Phone Line

Connect this RJ-11 jack to the wall jack of a standard, single-line
analog telephone line.

IFB

If using the phone line or handset interface for an IFB feed, the
balanced male XLR output may be used to feed an IFB earpiece or
other device. If using the 1/4” cue input / wireless adapter jack for
the telephone connection, the IFB feed must be taken from one of
the 1/4” headphone jacks. This also applies if you are planning to
record both sides of the conversation while using the 1/4” wireless
adapter jack for the telephone connection.

Operation (continued)

Talkback Feature

A built in speaker lets
you monitor the phone
line during call setup
and station breaks. The
monitor speaker volume
is controlled by the
headphone volume
control and has an
additional on / off switch
(near the A-B-C switch).
An internal push-to-talk
microphone also helps
when setting up your
call. The speaker
switches off when the
microphone button is
pushed on to prevent
feedback.

Keypad

The telephone keypad is equipped for tone or pulse dialing. You
may use the keypad at anytime during a call but keep in mind that
both transmit and receive audio are muted during a keypress.

VU Meter

The VU meter shows the mix of the microphones and the tape
signal going out over the phone line or to the handset interface.

Phone Line Switch
When using the RJ-11 analog phone jack, this switch acts as the
switch-hook for the telephone line. The Hang Up position is the
normal on-hook position when you are not using the line or you are
waiting for a call. When you want to place a call, or when a call
comes in, switch to the Dial/Talk position.

When using the Handset Interface, the switch should be in the
Hang Up position. When using the 1/4” Wireless Interface, the
switch should be in the Dial / Talk position.

8

9