Audio enhancement K-STD14 User manual

1
Rev.1.25
14241 S. Redwood Rd., Bluffdale, UT 84065 • Phone [phone] • AudioEnhancement.com
XD Pendant Microphone
K-STD14 | 1.9 GHz

2
Rev.1.25
Safety precautions
FCC CAUTION
Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
Compliance with FCC requirement 15.407(c)
Data transmission is always initiated by software, which is the passed down through the MAC,
through the digital and analog baseband, and finally to the RF chip. Several special packets are
initiated by the MAC. These are the only ways the digital baseband portion will turn on the RF
transmitter, which it then turns off at the end of the packet. Therefore, the transmitter will be on
only while one of the aforementioned packets is being transmitted. In other words, this device
automatically discontinues transmission in case of either absence of information to transmit or
operational failure.
Radio Frequency (RF) Exposure Warning
The available scientific evidence does not show that any health problems are associated with
using low power wireless devices. There is no proof, however, that these low power wireless
devices are absolutely safe. Low power wireless devices emit low levels of radio frequency energy
(RF) in the microwave range while being used. Whereas high levels of RF can produce health
effects (by heating tissue), exposure to low-level RF does not produce heating effects, causing no
known adverse health effects. Many studies of low-level RF exposures have not found any
biological effects. Some studies have suggested that some biological effects might occur, but
such findings have not been confirmed by additional research. 1.9 GHz Wireless Teacher
Microphone, model K-STD14 has been tested and found to comply with FCC radiation exposure
limits set forth for an uncontrolled environment and meets the FCC radio frequency (RF) Exposure
Guidelines.
Notice
FCC ID can be found on the battery compartment of the units.

3
Rev.1.25
WARNING:
1) To prevent fire or electric shock hazard, do not expose this apparatus to rain or moisture.
2) The apparatus should not be exposed to dripping or splashing and no objects filled with
liquids, such as vases, should be placed on the apparatus.
3) Batteries shall not be exposed to excessive heat such as sunshine, fire or the like.
The model number and serial number of this product may be found on the surface of the unit.
You should note the model number and serial number of this unit in the space provided and
retain this book as a permanent record of your purchase to aid identification in the event of theft.
Model No.
Serial No.
A lithium ion/polymer battery that is recyclable powers the product you have purchased.
Please call 1-800-8-BATTERY for information on how to recycle this battery.
MEDICAL:
Consult the manufacturer of any personal medical devices, such as pacemakers, to determine if
they are adequately shielded from external RF (radio frequency) energy. The unit operates in the
frequency range of 1.92 GHz to 1.93 GHz.
Do not use the unit in health care facilities if there are any regulations posted in the area instruct
you not to do so. Hospitals or health care facilities may be using equipment that could be sensitive
to external RF (radio frequency) energy
.
WARNING:
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent
type.

4
Rev.1.25
Contents
Important Safety Instructions .............................................................................................................. 5!
Precautions......................................................................................................................................... 6!
Major operating controls and their functions....................................................................................... 8!
Inserting a battery ............................................................................................................................. 12!
Fitting the microphone ...................................................................................................................... 13!
Using the microphone....................................................................................................................... 14!
Adjusting the volume......................................................................................................................... 15!
Muting ............................................................................................................................................... 17!
Connecting an external microphone ................................................................................................. 18!
Connecting an external device ......................................................................................................... 20!
Replacing a battery........................................................................................................................... 21!
Charging a battery ............................................................................................................................ 22!
Replacing the neck strap .................................................................................................................. 23!
Troubleshooting ................................................................................................................................ 24!
Specifications.................................................................................................................................... 27!

5
Rev.1.25
Important Safety Instructions
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus
(including amplifiers) that produce heat.
9) Only use attachments/accessories specified by the manufacturer.
10) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to
avoid injury from tip-over.
11) For safety reasons, do not physically modify the product or any optional equipment.
12) To prevent possible fire or electric shock, do not expose this product to rain or moisture.
13) Follow all warnings and instructions marked on this product.
14) The product should never be placed near or over a radiator or other heat source.
15) Do not dispose of the battery in a fire. It may explode. Check with local authorities for special
disposal instructions.
16) Do not open, puncture, crush, or drop the battery. A damaged battery must not be used. This can
result in the risk of fire, explosion, overheating, and leaking of the electrolyte.
17) Do not touch released electrolyte if the battery leaks. It may cause burns or injury to the eyes or
skin. The electrolyte is toxic and may be harmful if swallowed. If you touch it, immediately wash the
affected areas with water and seek medical help.
18) Exercise care in handling the battery in order not to short the battery to conductive materials
such as rings, bracelets, and keys. The battery and/or conductor may overheat and cause burns.
19) Do not use a microwave oven to dry this product.
20) The product may only be installed and serviced by qualified service personnel.

6
Rev.1.25
Precautions
Turn off the power supply when inside an aircraft.
The product might interfere with operational safety of the aircraft.
Do not attempt to disassemble or short-circuit rechargeable batteries.
An exploding battery or leaking battery fluid may result in fire, injury and burns.
Avoid placing the product in unstable conditions.
Failure to do so may cause injury.
Stop operation immediately when something is wrong with the product.
When smoke rises from the product or the smell of smoke comes from the product, continued use
will result in fire. Immediately remove the battery and the battery charger, and contact your dealer.
Do not swing the product around on its strap.
The strap might come off, resulting in personal injury or damage to the product.

7
Rev.1.25
[Precautions for use]
• Operating temperature: 5 °C - 35 °C {41 °F - 95 °F}
When calculating the battery life, note that temperatures below 10 °C {50 °F} shorten the battery
duration.
• Do not disassemble the product or touch internal parts.
• Exercise care when using the product in high places. If it falls down, it may cause personal injury or
suffer damage.
• Do not use or leave the battery in places where it will be exposed to high temperatures, such as in
strong direct sunlight, in a sun-heated car, by the fire, or in front of a stove.
• Do not touch the battery poles or contacts inside the battery cover with dirty hands. Otherwise poor
contact or noise may result. If dirty, wipe off with a dry soft cloth.
The contacts inside the battery cover tend to get dirty. Clean them regularly (about once a month)
with ethyl alcohol. Do not use solvents, such as benzine or thinner, or a metal polish. Otherwise the
contacts may become deformed or discolored, or the brass plating may come off.
• Do not use a deteriorated or short-circuited battery. A battery in this condition may leak fluid,
overheat and cause damage.
• The product is not made to drip-proof specification. Do not use the product with the wet hands in a
place where it is directly exposed to water.
• Do not swing the product around on the neck strap. As a preventative measure against strangling,
the closure of the neck strap provided is designed to give way under pressure. If swung around on
the neck strap, the closure will open and the product will come free, which can cause injury or
damage to product.
• The product is designed for indoor use.
• Use the product in a location where it is relatively shielded from noise produced by rotating
machinery, transformers or the ignition system or automobiles.
• Do not place the product on top of heat generating equipment, such as powered amplifiers, video
monitors or measuring instruments, and do not leave it in a closed car in hot summer. When storing
the product, do so in a dry place.
• The product is high-precision adjusted; exposing it to strong impact or dropping it on the floor may
change its characteristics. Handle the product with care. Do not expose the product to shock or
impact, as this will cause the audio output of the receiver to give off noise on impact.
Product care
• Clean the power source with a dry cloth.
• Do not clean with volatile liquids such as benzine and thinner.
• When using a chemical cloth for cleaning, observe the cautions provided with the product.
Useful hints
• Noise prevention
Turn off the power of this product, and turn down the volume of a powered amplifier, mixer, etc.
before replacing, removing or inserting the battery, as this might produce a loud noise from these
devices.
• Volume control
When the volume control from this product goes wrong, move closer to the receiver and then try
again to adjust the volume.

8
Rev.1.25
Major operating controls and their functions
14
14
1
2
3
4
6
5
8
13
9
10
12
11
7
Rear View
Battery cover removed
(Inside the battery cover)
18
16
15
17

9
Rev.1.25
[1] Microphone opening
This opening picks up the speaker’s voice.
[2] [OWN] Microphone selection indicator (green)
Lights when [OWN] (audio from [1], [6], or [13]) is selected for adjusting the volume.
Blinking indicates that the microphone is muted.
[3] [OTHER] Microphone selection indicator (green)
[OTHER] microphone refers to another microphone receiving audio at the same receiver. LED lights
when the [OTHER] microphone is selected for volume adjustment.
[4] [LINE] Line selection indicator (green)
[LINE] refers to external devices connected to the line input terminal on the receiver. Lights when
[LINE] is selected for adjusting the volume.
[5] Volume control buttons
Adjust the volume of [OWN], [OTHER] and [LINE]. (Adjustment step range: refer to the XD Receiver
[K-SRC14] manual) Adjust when any one of the indicators in [2] to [4] is on.
Pressing thebutton will increase the volume.
Pressing the button will decrease the volume.
Keeping the buttons pressed will continuous increase / decrease the volume.
[6] [MIC IN] Microphone input terminal (side)
Transmits the audio from a connected external microphone to the receiver.
When an external microphone is connected to this terminal, the audio from the [1] Microphone
opening is muted.
[7] [CHG] Charge indicator (red)
Indicates the charging status or alert activation
Blinking (2 seconds interval lights): Charging.
* In the case of a complete discharge state, the LED lights red for the first minute.
ON: [During charging] Charging completed
[During E2 state or after both E2 [14] button have been pressed] E2 state
[During microphone operation] Battery is empty

10
Rev.1.25
Blinking (500 milliseconds interval lights): Charge Error. Likely indicating that the temperature of
the battery may be out of the acceptable range. Confirm that the temperature is within the
acceptable range.
OFF: Microphone is off, not connected to a charger or no battery installed.
[8] [DC IN] DC input terminal (side)
Used to connect the charger for charging the battery installed in the microphone.
[9][REC] button
Pressing this button will activate E1 output. (A signal is sent from the E1 contact of a receiver.)
[10] [PWR/MUTE] button
Pressing this button will turn the microphone power [ON / OFF]. To turn "ON", press it for 1 second
or more, to turn "OFF", press it for 2 seconds or more.
While the power is on, pressing this button short once will mute the microphone, and pressing this
button again will cancel muting.
[11] [SELECT] button
Selects the target for volume control.
Each time the button is pressed, the selection indicator changes as follows:
OWN [3] -> OTHER [4] -> LINE [5] -> OWN [3].
[12] [BATT] Battery indicator
Indicates the status of the microphone power supply and the battery condition as follows:
Green light: Power is turned "ON".
Yellow light: Power is turned “ON”, but battery is low.
Red light: Battery is depleted. Charge the battery.
Light off: Power is turned "OFF".
Blinking (green or orange): Pairing is in progress.
Blinking (green): Under connection to Receiver*1 or Voice disconnected state.
(*1 When connecting two microphones to a receiver and am going to connect the third unit
microphone, it occurs.)
Blinking (yellow): Out of range.
Blinking (red): A pairing registration error with a receiver. (Refer to the Troubleshooting section
on page 24)

11
Rev.1.25
[13] [AUDIO IN] External input terminal (side)
Transmits the audio from a connected external device to the receiver.
When an external device is connected to this terminal, audio from the [1] microphone opening and
[6] microphone input terminal is muted.
[14] E2 Button (both sides)
Press and hold both side E2 buttons simultaneously for 2 seconds or more to activate the E2
output (alert).
A signal is sent from the E2 contact of a receiver. (This alert can also be sent when the microphone
is off.)
In order to release the Microphone from its E2 state, restart the microphone. Press and hold
PWR/MUTE 2 seconds or more to turn it off. Press the PWR/MUTE button one more time to turn
on the power again.
Note: This will not release the E2 state on the receiver right away. To release the receiver’s E2
state, please read the instruction manual for the receiver (K-SRC14).
During an E2 state, all button operations are not possible, except for power OFF.
When sending an alert out of range of a receiver, the alert will wait to send until connection is
possible. (Refer to K-SRC14 manual: Alert message and sound at E2)
[15] Neck strap
Allows users to wear the microphone around the neck.
[16] Clip (rear)
Allows user to adjust the neck strap to an appropriate length. The clip can attach to the user’s
clothes as well.
[17] Battery cover (rear)
The battery cover can be removed by pushing down and pulling in the direction of the arrow.
[18] Battery slot (inside the battery cover)
Install one lithium-ion rechargeable battery, paying attention to the charging terminal inside the
battery cover.

12
Rev.1.25
Inserting a battery
• To insert a battery, turn off the power of the microphone, and make sure that the microphone is not
connected to the charger.
• To replace a battery, refer to the "Replacing a Battery" section on page 21.
Note:
• Do not touch the battery poles with hands. Otherwise poor contact or noise may result. If dirty, wipe
off with a dry soft cloth.
1) Confirm that the battery indicator is off.
If it is not, press and hold the PWR/MUTE button for 2 seconds until the battery indicator turns off.
2) Remove the battery cover.
Pull the battery cover in the arrow direction depicted above while pressing the A position with both
right and left thumb.
3) Install a battery.
Insert the battery, making sure that its orientation is correct.
About batteries that you can use with this unit
The 1U583136R-B006A (Lithium Ion Battery) is the only battery that can be used in this microphone.
4) Attach the battery cover.
Push up the battery cover in the direction of the arrow depicted in the figure above, and fit it back in
its original position.
1Battery indicator
3
2
4
A
Battery cover
Rear view

13
Rev.1.25
Fitting the microphone
When fitting, removing, or adjusting the position of the microphone, turn off the power and make sure
that the microphone is not connected to the charger.
1) Place the microphone around the neck of the person speaking.
Widen the looped part of the strap above
the microphone and place it around the
speaker’s neck, with the front of the
microphone facing outward as shown in
the illustration on the right.
2) Adjust the position of the microphone.
While holding the lower end of the neck
strap with one hand and opening the clip
at the rear of the microphone with the
other, pull up the microphone to the level
of the speaker’s chest.
Adjust so that the distance between the
speaker’s mouth and the microphone
opening is approx. 15 cm {~6"} as
shown in the illustration at right.
Let go of the clip in the desired position.
If bothered by the sound of the microphone rubbing against your clothes, fix the clip at the rear of the
microphone to your shirt pocket or placket.
Note:
• The neck strap is provided with a safety closure to prevent strangling. It is not meant to fit the
microphone.
• To remove, reverse the above procedure.

14
Rev.1.25
Using the microphone
To turn on the microphone, press its [PWR/MUTE] button for 1 second or more.
The battery indicator of the microphone lights. To turn off the power, press the button for 2 seconds
or more. The battery indicator of the microphone turns off.
Memo:
When [BATT] indicator blinks yellow (except when outside), the pairing registration to a receiver is
required. Press the receiver’s [LINK] button, then press and hold the microphone’s [PWR/MUTE]
button and [REC] button until you hear a beep and the [BATT] indicator turns green.
Important:
• While using the microphone, do not take the microphone close to the speaker. It can cause loud
audio interference, such as feedback, that can damage your hearing.
Note:
・When a microphone goes “out of range”* of its receiver for approx. 5 minutes, the microphone turns
off automatically.
To use it again:
Press the microphone’s [PWR/MUTE] button for 1 second or more.
･When using 2 microphones, the receiver’s LINK button is invalid. (K-SRC14)
•Also read the operating instructions of the receiver (K-SRC14)
(*Out of range = audio waves will not reach the receiver)
Battery indicator
[PWR/MUTE] button

15
Rev.1.25
Adjusting the volume
The microphone can control the volume of all audio signals that come from the receiver (K-SRC14).
1) Press the selector button
When the SELECT button is pressed for the first time after turning on the power, the [OWN] selection
indicator lights. Every subsequent press of SELECT will move the light between [OWN], [OTHER],
and [LINE]. Choose the audio source that needs volume adjustment. The selection indicators light in
the following order:
[OWN] -> [OTHER] -> [LINE] -> [OWN].
* The selection indicator lights for 5 seconds. If no operation takes place within this period, the
indicator turns off automatically, but the microphone remembers the selection.
2) Press the volume button
While the selection indicator for the selection made in 1 is lit, press the volume button up or down.
will increase the volume, pressing will decrease it. ReferPressing the volume button
to the receiver manual (K-SRC14) for an adjustment range. The selection indicator goes off 5
seconds after the volume button was pressed for the last time.
• When [OWN] is lit
User adjusts the audio volume of this microphone (input from the microphone opening, external
input and microphone input)
* Adjustment is not possible while mic is muted (the [OWN] selection indicator will blink)
Selection indicator
1 Selector button
2 Volume button

16
Rev.1.25
• When [OTHER] is lit
User adjusts the volume of another paired microphone.
• When [LINE] is lit
User adjusts the volume of the external device (CD player or MP3 player) that is connected to the
line input connector of the receiver that receives audio from the microphone.
Note:
• While the microphone is muted, volume control of the [OWN] microphone is disabled but enabled
for [OTHER] and [LINE].

17
Rev.1.25
Muting
If you want to temporarily stop the audio transmitted from this microphone to the receiver without
turning off the microphone, you can temporarily mute the audio signals.
1) Press the [PWR/MUTE] button.
Press the [PWR/MUTE] button once. The microphone mutes and the [OWN] selection indicator
starts blinking. While muting is activated, audio input of the [OWN] microphone (audio input from
microphone opening, external input and microphone input terminal) is muted. To cancel muting,
press the [PWR/MUTE] button again.
Note:
• After muting is maintained for approx. 5 minutes, the microphone turns off automatically.
Turn the microphone on again by pressing the [PWR/MUTE] button for 1 second or more.
• In the muted state, volume control of the [OWN] microphone is disabled, but [OTHER] and [LINE]
are still enabled.
･When E2 occurs in MUTE, MUTE is removed forcibly.
･When users want to MUTE the microphone automatically as soon as they leave the classroom,
users can set that option in voice call areas. (Refer to K-SRC14 Manual. “Serial communication
command ‘SAA’”)
[PWR/MUTE] button
[OWN] selection indicator

18
Rev.1.25
Connecting an external microphone
This function allows you to use an external microphone instead of the microphone opening of this
microphone. Connect an external microphone (for example, an electret condenser microphone) to
the microphone input terminal of the microphone, and transmit the audio to the receiver.
1) Turn off the power of the microphone.
2) Using the ø3.5 mini-plug, connect the external microphone (for example, a commercially
available electret condenser microphone) to the microphone input terminal.
3) Turn on the power of the microphone.
Important:
• Do not connect external devices (CD players or MP3 players) to the microphone input terminal.
Loud noises that result may damage your hearing. When an external device is mistakenly connected,
turn off the power of the microphone and the external device, disconnect the plug, and connect the
device to the external input terminal on the other side of the microphone.
Note:
• Once the ø3.5 mini-plug is plugged into the microphone input terminal, priority is given to this audio
transmission from an external microphone and the audio from the microphone opening will not be
transmitted.
1,3 [PWR/MUTE] button
Microphone input terminal
Electret condenser microphone
(commercially available)
φ3.5 mini-plug
2

19
Rev.1.25
• The microphone input terminal of the microphone is a monaural terminal. If a stereo external
microphone is plugged into the microphone input terminal, either the right or the left channel audio
will be transmitted.
• When fine-tuning the volume of an external microphone using this microphone, select [OWN] by
pressing the selector button. For fine tuning, refer to the "Adjusting the volume” on page 15.
• Use a unidirectional microphone. The use of an omnidirectional microphone may cause feedback.
• In addition to this manual, refer to the operating instructions of the external microphone to be
connected.

20
Rev.1.25
Connecting an external device
You can connect an external device (for example, a portable CD player) to the external input
terminal and transmit the audio to the receiver.
1) Turn off the power of the microphone and the external device.
2) Connect an external device.
Use a ø3.5 stereo mini-plug to connect the external device (for example, a portable CD player) to the
external input terminal.
3) Turn on the power of the external device (for example, a portable CD player).
4) Turn on the power of the microphone.
5) Adjust the volume.
Adjust the audio volume of the external device.
Note:
• Once a ø3.5mm stereo mini-plug is plugged into the external input terminal, priority is given to this
input and the audio from the microphone opening and the microphone input terminal will not be
transmitted.
• If an external microphone is mistakenly connected to the external input terminal, the audio
of the external microphone will not be transmitted. Turn off the power of the microphone, disconnect
the plug, and connect the external microphone to microphone input terminal.
• If the audio of the external device is stereo, stereo signals will be mixed.
• When fine-tuning the volume of an external device using this microphone, select [OWN] by
pressing the selector button. For fine tuning, refer to "Adjusting the volume" section.
• In addition to this manual, refer to the operating instructions of the device to be connected.
External input terminal
1,4 [PWR/MUTE] button
2