System Components.........................................1
DHT-QUAD Receiver Features..........................2
HH76/HH76SC Handheld Transmitter................3
MBP76 Body Pack Transmitter...........................4
System Setup....................................................5
Rack-Mounting the Receivers............................6
Troubleshooting.................................................7
Specifications....................................................8
DHT-QUAD System
Frequency Band
Thank you for purchasing the DHT-QUAD wireless system. For users who need an advanced UHF
wireless system, the DHT-QUAD provides an excellent solution. With 120 selectable channels, the
DHT-QUAD is perfect for applications such as live shows, broadcast, meetings, musical instruments, etc.
Touch buttons and liquid crystal displays allow for a quick and simple system setup.
The “User Guide” and “ Quick Setting Guide included in your system will provide all the details
you need to operate the system efficiently.
”
Most countries closely regulate the radio frequencies used in the transmission of wireless information.
These regulations state which devises can use which frequencies, and help to limit the amount of RF
(radio frequency) interference in all wireless communications.
The DHT-QUAD offers 120 selectable channels within the 655-679MHz frequency range.
To facilitate system setup and protect against RF interference, each system comes with multiple
predefined frequency groups and channels.
When using a single receiver/transmitter, the operating frequency will generally not have to be
changed. In an installation with multiple receivers/transmitters, each set must operate on a separate
channel from the others. The group and channel system provides an optimum frequency spread when
using multiple receiver/transmitter systems.
Up to 4 DHT-QUAD units, providing up to 16 individual receiver/transmitter sets, may be used in
a single installation.
All systems include:
DHT-QUAD Receiver
2 (AA) Batteries
¼" to ¼" Audio Cable
Power Supply
Two Antennas
Rack Ears
User Guide
DHT-QUAD Handheld System includes
HH76 or HH76SC Handheld Mic/Transmitter
:
DHT-QUAD/76 Lav/Headset/HLC Systems
include:
MBP76 Bodypack Transmitter.
Mic (choice of Uni Lav, Uni Headset,
or HLC Combo Lav/Headset)
DHT-QUAD/76 Guitar system
includes:
¼"｡to Mini 3-pin Guitar Cable.
MBP76 Bodypack Transmitter and
2
On/Off Switch
1
2
3
4
5
6
7
Infrared (IR) Window
1
2
3
6
Antenna Jack B
7
12
10
4
5
9
Channel 3 XLR Output Jack
Channel 2 Fine Adjustment of Mute Threshold Level
Channel 4 XLR Output Jack
Channel 1 XLR Output Jack
Channel 1 Fine Adjustment of Mute Threshold Level
Channel 4 Fine Adjustment of
Mute Threshold Level
Channel 2 XLR Output Jack
Channel 3 Fine Adjustment of Mute Threshold Level
8
1/4inch Mix Output Jack
DC Power Input Jack
11
13
Antenna jack A
Unbalanced Mix Output Jack
Audio Level Meter
LCD Panel
System Setup Button
Please see “System Setup” on Page 5
System Menu Up button
Please see “System Setup” on Page 5
ASC Sync Button
Press to initiate IR connection between
Receiver and Transmitter.
10
8
9
Antenna B Indicator
Lights when Antenna B is active .
System Menu Down button
Please see “ System Setup” on Page 5
Antenna A Indicator
Lights when Antenna A is active .
DHT-QUAD Receiver Features
Functions:
Interchangeable Microphone Head.
HH76: Dynamic, HH76SC: Dynamic Super Cardioid
LCD screen
Power/Backlight/Mute Control Switch.
Press and Hold for Power ON/OFF.
Press and Release for Backlight.
Press and Release for Mute On/Off.
Select Button.
Press and Hold to enter Group select.
Press repeatedly to choose Group Number.
Press and Hold again to enter Channel select.
Press repeatedly to choose Channel Number.
Microphone Gain Control.
Note: To prevent accidental power or mute changes
during a performance, you may set the Lock function by
a simultaneous press and release of buttons 3 and 4. This
will disable all buttons and a “lock” icon will appear in the
LCD. Repeat procedure to return to normal operation.
1
2
3
4
5
Battery Replacement
The life expectancy of two alkaline batteries is about six hours.
When the Battery Power Symbol on the display screen starts
flashing, as shown in the diagram, the batteries should be replaced immediately, as shown below.
HH76/HH76SC Handheld Transmitter
HH76/HH76SC Handheld Transmitter
1
Wearing the Backpack Transmitter:
Clip the transmitter to a belt . For best results, slide the
transmitter down until the belt is pressed against the base
of the clip. Or, slide a guitar strap through the transmitter
clip ,as shown.
1
2
Changing batteries:
Expected life for Two Alkaline batteries is approximately 6 hours.
Replace batteries when the Green Power LED and the LCD
Battery Indicator (shown below) begin to blink.
Features
Antenna.
LCD panel.
Please see (System Setup) on Page 5.
Power/ASC/ Low Battery Indicator.
Constant Green: Power ON.
Flashing Green: IR ASC in progress, or Low Batteries.
Mute Indicator.
Constant Red: Audio Muted.
Power/Mute Button.
Push and Hold for Power On/Off. Push once for Mute On/Off.
IR W
Receives IR signals (ASC) to synchronize with Receiver.
Select Button.
Please see (System Setup) on Page 5.
3-pin Microphone Input Jack.
Gain Adjustment Switch.
Three gain settings are available. Choose the
appropriate setting for your application:
Mic: Microphone
0dB: Guitar with passive pickups
-10dB: Guitar with active pickups, or Line Level Signals.
Note: To prevent accidental power or mute changes
during a performance, you may set the Lock function by
a simultaneous press and release of buttons 5 and 7. This
will disable all buttons and a “lock” icon will appear in the
LCD. Repeat procedure to return to normal operation.
indow.
2
3
4
5
6
7
8
9
5
Hh76 and MBP76 Transmitter Status Display
Battery Status:
Battery Status Indicators for both the Handheld and Bodypack Transmitters
feature Four Level Displays as shown in .
Group and Channel Display:
After completing the ASC, both the Handheld and Bodypack Transmitters
will display the Group and Channel numbers selected as shown in .
Normal Display:
Both Handheld and Bodypack Transmitters will display Group and Channel
numbers as well as Battery Status as shown in .
1
2
3
3
Group and Channel Selection: Press “SET” button twice,
“GROUP SELECT” will display, press or to choose the appropriate
frequency group, as shown on the left . Press “SET”again , “MANUAL
CHANNEL SELECT” will display, press or to choose the appropriate
channel, as shown on the left .
For best results when operating multiple systems, set all systems to
a single group, then set each system to a unique channel within that
group.
Auto Frequency Finder function on the Receiver:
Choose “AUTO CHANNEL SELECT” by pressing “SET” once,
then press or . Receiver will automatically find a clear
frequency with no interference as shown on the left .
Receiver Volume Setting:
The receiver has an electronic volume control. Press or
from the normal display (00 to 63), as shown on the left .
Normal Display:
Frequency and Antenna A/B (RF Received) as left .
Place the Transmitter “IR” window to face the Receiver “IR” window.
Then press the “ASC” button on the desired Receiver. The Transmitter
will automatically match the Receiver frequency.
Attention: The distance between the Receiver and Transmitter
IR windows should be less than 0.5m during the ASC IR setup. When
setting up multiple Transmitters/Receivers, activate the ASC function
of only one Transmitter and Receiver at a time.
Receiver Programming
1
2
4
5
Transmitting frequency automatic setup:
Rack-Mounting the Receiver
Maintain a line of sight between
transmitter and antenna.
Ten BNC connecting cables (optional)
Two BNC connectors (optional)
Shown with optional ANTDIST
antenna distributor.
Four DHT-QUAD receivers
Optional BNC Cables to Front
mount antennas.
Issue Indicator Status Solution
Troubleshooting
Transmitter LCD off.
Turn on transmitter.
Make sure the batteries are installed
correctly.
Receiver LCD off. Make sure AC adapter is securely
plugged into electrical outlet and into
DC input connector on rear panel of
receiver.
Receiver indicates RF. Increase receiver volume.
Make sure Gain adjustment switch on
the transmitter is set correctly (applies
only to MBP76 Bodypack.)
Receiver indicates No RF,
Transmitter LCD is on.
Make sure Transmitter and Receiver
are set to the same frequency.
Make sure Transmitter is in range of
Receiver.
Make sure no large metal objects are
near Transmitter or Receiver.
The battery power indicator
light on LCD flashes.
Change the batteries in transmitter.
Distortion or
unwanted noise.
Receiver Indicates RF.
Remove nearby sources of RF inter ference (CD players, computers,
in-ear monitor systems, etc.)
Distortion level
increases gradually.
Sound level different
from cabled guitar or
microphone, or when
using different guitars.
Adjust Transmitter Gain and Receiver
Volume as necessary.
Transmitter power indicator
light flashing on the LCD.
Replace Transmitter batteries.
Maintain a line of sight between transmitters and antennas.
Avoid placing the receiver near metal surfaces or any digital equipment (CD players, computers, etc).
Keep the receiver away from the wall and at least 1m from the ground.
Cellular telephones and two-way radios can interfere with the operation of wireless systems.
Do not use these devices in close proximity to the wireless systems.
Tips for Improving System Performance
No sound or faint
sound.
System
Band: UHF
Frequency Range: 655 - 679 MHZ
Transmitter Output level: 10 dBm
Operating Range Under Typical Conditions:
Note: actual range depends on RF signal
absorption, reflection, and interference.
Audio Frequency Response: (+/-3dB)
60Hz~16KHz
Total Harmonic Distortion (+/-30KHz deviation，
1KHz tone): <1%
Dynamic Range: >90dB A-weighted
Operating Temperature Range:
14ºF to 122ºF (-10º C to +50º C)
Note: battery characteristics may limit
this range:
300'
Bodypack Transmitter:
+10 dBV maximum at 0 dB gain position.
+20 dBV maximum at 10 dB gain position.
Gain Adjustment Range: 30dB
Input Impedance: 470K
Dimensions: 3.5" x 2.6" x 1"
(89mm H x 65mm W x 24mm D)
Weight: 3.0oz (85 g) (without batteries)
Power Requirements:
2 “AA” alkaline or rechargeable
batteries
Battery Life:
About 6 hours
Max Audio Input Level:
0 dBV maximum at mic gain position.
Batteries
Receiver:
Audio Output Level: (+/-30KHz deviation, 1KHz tone)
XLR connector (into 600 Ohms load) -12dBV
¼" connector (into 3KOhms load) -18dBV
Output Impedance: XLR connector 200Ohms
¼" connector 1KOhms
XLR output: Impedance balanced
Pin1：Ground (cable shield)
Pin2：Audio
Pin3：No Audio
Sensitivity: -93dBm for 30dB
Image Rejection: >60dB
Dimensions: 1.7" x 16.1" x 11"
(45mm H x 410mm W x 280mm D)
Weight: 7.3lbs (3300 g)
Power Requirements:
12-18 V dc at 1000 mA, supplied by external
power supply.
Handheld Transmitter:
Max Audio input level:
Dimensions: 9.5" x 2.1" dia. (242mm x 54mm dia.)
Weight: 10.6oz (300 g) (without batteries)
Power Requirements: 2 “AA” size
alkaline or rechargeable batteries
Battery Life: About 6 hours
0dBV
A RETURN AUTHORIZATION (RA) NUMBER MUST BE OBTAINED from Galaxy Audio prior to any
items being returned to Galaxy Audio for return or repair. Contact customer service @ (800)369-
7768.
Galaxy Audio warrants the materials and workmanship of its products as follows:
A limited THREE YEAR Warranty applies to the following products:
1. HOT SPOTS-including HSRG, HSVC, PA5XD & GALACTIC MONITOR PACKAGE
2. MICRO SPOTS-including MSVC, MSPM, MSPA(DC)
3. CRICKET Polarity Test Set
4. JACKS IN THE BOX – including the MULTI MIXER
5. Hot Spot Accessories
A limited ONE YEAR Warranty applies to the following products:
1. CHECKMATE Series-including CM130, CM140, CM150, CM160, CM-C200 and accessories
2. ANY SPOT Series-including AS-1000(R)(T), 500 & 700 SERIES, TOUR GUIDE/TRANSLATOR
SYSTEMS, WIRELESS CAMERA KIT
3. ANY SPOT Accessories & Components
4. TRAVELER SERIES-including ANY SPOT TRAVELER, WIRELESS SPEAKERS, WIRED PA
SYSTEM PACKAGES, TRAVELER W/ECHO
5. TRAVELER Accessories
The following are not covered by the warranty:
1. Damage to or deterioration of the exterior of the item which occurs after delivery
2. Damage after initial delivery resulting from accident, misuse or neglect
3. Damage resulting from failure to follow instructions contained in the owner's manual
4. Damage resulting from the performance of repairs by someone other than the Galaxy Audio
repair department
5. Damage occurring during the shipment or delivery of any Galaxy Audio product to Galaxy Audio
after initial delivery of the product to you.
6. Damage to any Galaxy Audio product which has been altered or on which the serial number has
been effaced or removed.
7. Damage to or deterioration of the exterior of the item which occurs after delivery
Galaxy Audio does not authorize any third party including any dealer or Service Center to assume
any liability on behalf of Galaxy Audio or to make any warranty for Galaxy Audio
DEFECTIVE MERCHANDISE POLICY-WARRANTY
A RETURN AUTHORIZATION (RA) NUMBER MUST BE OBTAINED from Galaxy Audio prior to any
items being returned to Galaxy Audio for return or repair. Contact customer service @ (800)369-
7768.
The Galaxy Audio warranty policy is to repair and return defective merchandise. Items under
warranty may be replaced at no charge if deemed un-repairable by the Galaxy Audio technician.
Proof of purchase may be required to verify warranty status. Customer will be responsible for
shipping charges to repair facility, repaired product will be returned
shipping prepaid by Galaxy Audio. Freight charges will not be reimbursed. Credit for defective
warranty merchandise must have authorization from the Galaxy Audio main office
before credit will be issued and will be subject to applicable restock and replacement charges.
A twenty (20%) restock fee will apply to warranty items returned for credit. The cost of replacement
parts to bring the item back to “like new” condition will also be deducted from credit for warranty
items
DEFECTIVE MERCHANDISE POLICY-NON WARRANTY
A RETURN AUTHORIZATION (RA) NUMBER MUST BE OBTAINED from Galaxy Audio prior to any
items being returned to Galaxy Audio for return or repair. Contact customer service @ (800)369-
7768. Repair charges are $30.00 per hour (no minimum) plus parts. Customer will be responsible for
all shipping charges. Prepayment is expected if customer is not set up with open account terms in
advance. Discounts are not applicable on repairs. Open account terms for repairs will be Net Thirty
(30) days. Some items past the warranty time period may qualify for a standard replacement cost.
Please contact Galaxy Audio for more information.
Please visit galaxyaudio.com for the latest updates
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