Spectra DAX-275 User manual

Telephone Headset
Amplifier
Owner s Manual
(DAX-275)

[02]

Introduction
Your new headset amplifier is a device that helps you to use your
telephone, computer and external audio device through a headset. It
gives you hands free, fatigue-free conversation through a headset at
the same time.
Please read this manual carefully that you can quickly learn the
functions provided.
1. Features & Overview
2. How to install
Stage 1. Installing batteries
Stage 2. Connecting to your telephone, headset
3. How to test before use
Stage 1. Checking for Compatibility
1. Compatibility setting between telephone and amplifier
2. Compatibility setting between headset and amplifier
Stage 2. Checking for optimal sound
1. Adjustment of Listening / Transmission Volume
2. Adjustment of dip switch(Transmission Level)
4. Operation
5. Troubleshooting
6. Warranty
[03]

[04]
1. Features & Overview

1. Mute Button
(= Battery test)
Press the button to cut off the
microphone temporarily. Just
depress the button to resume
communication with your caller.
If the battery test indicator does
not light by pressing mute
button, replace all the batteries.
(Operational battery life : not
less than 2,000 hours)
2. Listening Volume Controller
You can increase or reduce the
volume of your caller s voice.
3. Handset / Headset Button
Press it for handset use and
depress it for headset use.
4. Battery test indicator
Press mute button, if it does not
right, replace all batteries.
5. Tone control switch
Set the tone Control Switch to
be soften or normal.
6. External power supply jack
()
You can use AC power adapter
(3V DC) instead of battery.
7. Handset Jack (HANDSET)
Connect your handset to this
jack.
8. Telephone jack (TEL)
Connect a telephone curly cord
supplied between the handset
jack of your telephone and
amplifier.
9. Stereo Jack for Recorder
The Stereo plug of recorder can
be connected (Option).
10. Telephone Compatibility
Switch
Compatibility setting between
telephone and amplifier.
11. Headset Compatibility
Swithch
Select the knob to the left or
right until you can hear.
12. Dip switch
For transmission level and
dynamic microphone.
[05]
Features

13. Transmission volume
controller
Set the volume controller by
sliding the knob when it
becomes optimal sound for your
caller.
14. Headset Jack
Connect your headset to this
jack.
15. Security cover
16. Battery cover
17. Telephone curly cord
Connect this cord between
telephone and amplifier.
18. Headset Hanger
19. Attenuated cord( Option)
Connect the attenuated cord
between stereo jack for recorder
and recorder s for call
recording.
[06]

[07]
2. How to install
Stage 1. Installing Batteries
We recommend two AA alkaline
batteries (Not included) for installation.
Operational battery life are about 2,000
hours.
- Remove the battery cover on the side
of amplifier.
- Install two AA alkaline batteries and
replace the battery cover
- Press the Mute button to confirm if
the batteries are well fitted or not.
* Note : Alternatively, if you want to use AC power
supply (Not included), you can connect AC
adapter (3V DC OUT / 100mA~300mA) to
external power supply jack. (Feature no.6).
Stage 2. Connecting to your
telephone, headset
1. Unplug your telephone s handset
cord from the telephone base and
plug it into the handset jack of
amplifier(Feature no. 7)

2. Connect a telephone curly cord
(Feature no.17) between the
handset jack of your telephone and
Telephone jack of amplifier
(Feature no.8)
3. Plug one complete headset to the
headset jack of amplifier (Feature
no.14) located on the front side of
the cabinet
[08]

[09]
3. HOW TO TEST BEFORE USE
Stage 1. Checking for
Compatibility
Wearing the headset, Lift the handset
from its cradle, position it off-hook and
listen.
1.Compatibility setting between
telephone and amplifier
If you can t hear dial tone at factory
setting, adjust the compatibility
switch between telephone and
amplifier as follows
1) Remove the Security cover which
is located on the side of amplifier.
2) Slide the compatibility switch by
clicks until you can hear a clear
dial tone.
3) If the transmission voice can not
be heard or very low, slide
Microphone Selection Switch to
“c”
REVISION
“
”

Stage 2. Checking for
Optimal Sound
1. Adjustment of listening
/ Transmission volume
Firstly, place the digit no.5 of listening
volume controller to the center and set
the white marking part of microphone
volume controller to the center.
After the above setting, if the unit is not
working properly, use the following
adjustments for the best set-up.
1) If there is beep sound, slide the
Transmission volume controller to
the right side(-) for low volume. And
if Listening / Transmission is low,
slide Transmssion volume
controller to the left(+) and increase
Listening volume controller at the
same time until they are increased
for proper level for your caller.
2) If there is humming tone, adjust
both Listening and Transmission
volume controller to the low volume
side at the same time.
[010]

3) If there is high pitched feedback
when the volume is set to normal
usage levels, adjust the distance of
headset boom between the
microphone head cap and your
mouth. The proper distance is one
inch apart from your mouth.
2. Adjustment of dip switch
Please adjust both receiving &
transmitting volume level properly
by following dip switch settings;
Dip Switch NO.1
ON : TX Volume Increase
OFF : TX Volume Decrease
Dip Switch NO.2
ON : RX Volume Increase
OFF : RX Volume Decrease
[011]

3. To record a call
Connect an Attenuated Cord
(Feature No.19) optionally supplied
between Stereo jack for recorder
and your computer or exterior
recorder. Operated recording
function of the computer or exterior
recorder. You may need this record
for your job references or to report
the record to the other party or your
boss.
4. Mute
If you press Mute button during
telephone call, the cther party
cannot hear your voice until you
push up mute button.
[012]

4. Operation
Receiving by headset : Depress the headset/handset
button(feature no.3), wear the headset. Lift the handset from its
cradle and place it "off hook" when the telephone rings. You can
answer the telephone by headset.
Making a call by headset : Depress the headset /handset button
(feature no.3), wear the headset.
Lift the handset from its cradle and place it "off hook" and dial after
listening tone signal. To terminate a call, hang up the telephone
handset.
Handset use : Press the headset /handset button (feature no.3), lift
the handset, dial after listening dial tone.
* Off hook lever use( option) : "Off-hook Lever" eliminates the need
for you to lift the handset, just pull the lever when the telephone
rings, you can talk with the caller without completely removing the
handset from its cradle.
Remarks : if your telephone has a program for "headset" use or a
switch that can be used by headset, you won't need to lift the
handset every receiving or call. Just press a button for making or
receiving a call. The telephone that has the headset-use button will
vary from one telephone to another, but most often it is the "line
button".
Check your telephone's manual for details. Most of key phone
systems have this program.
[013]

5. TROUBLESHOOTING
The following information covers common problems and suggests
solutions.
If the amplifier and headset are not operating properly, follow the
suggestions in this section
CALLERS CAN’T HEAR ME AND I CAN’T HEAR MY CALLERS
1. Check the installation. Check all cords are properly connected.
2. Check the Handset / Headset button. Push the button down for
handset use, and push-up for headset operation.
CALLER’S VOICE IS LOW OR DISTORTED.
1. Adjust the Listening Volume Controller on the amplifier.(feature no.2)
2. Replace your batteries. For best results, use Duracell alkaline
batteries.
CALLERS CAN’T HEAR ME, BUT I CAN HEAR THEM.
1. Be sure the microphone is properly positioned, about one inch
from the corner of your mouth.
2. Adjust the Transmission volume controller (Feature no.13)
[014]

THE PEOPLE I’M TALKING TO SAY I SOUND UNCLEAR OR
TOO FAR AWAY.
Adjust the position of your microphone.
The best place for the microphone is not directly in front of your
mouth, but near the corner of it, smiliar to the way you position the
telephone handset. In this position, you can pick up the sound
waves from your speech, but not the air moving from your mouth
and nose.
MY VOICE ECHOES OR I SOUND LIKE I’M IN A TUNNEL
Slide the Transmission volume Controller to the left side for a lower
volume.
[015]

WARRANTY
We will repair or replace, at our opinion, this product if found
defective due to materials or workmanship within the warranty
period beginning from the original date of purchase. This product is
warranted by authorized representative for the period specified.
The original dated purchase receipt must be presented to the
authorized service center when service is rendered.
On all carry-in models, transportation to and from the service station
is the responsibility of the purchaser.
This warranty does not cover damages due to
accident,fire,flood,earthquake and/or other acts of God; misuse,
incorrect line voltage, improper installation, improper or
unauthorized repairs, commercial use or damages occurred in
shipping.
Exterior and interior finish, lamps, glass, plastics parts and
temperature probes are not covered under this warranty.
Customer adjustment according to the owner's manual are not
covered under this warranty.
This warranty is automatically void if the serial number is missing or
altered.
[016]