Audioplex HD-100 User manual

HD-100 Reference Amplifier
POWER
OFF
ON
TECHNOLOGY
TM
HD-100

Contents
Contents
Warning...........................................................................................................................................1
Unpacking......................................................................................................................................2
Short Form Instructions.....................................................................................................................2
Installation
Environment....................................................................................................................................3
Important Safety Instructions.............................................................................................................3
Description.......................................................................................................................................4
Features............................................................................................................................................4
Accessories.....................................................................................................................................4
Front Panel ......................................................................................................................................5
Rear Panel .......................................................................................................................................6
Applications
Stereo Installation............................................................................................................................7
Bridge Mono Installation ..................................................................................................................8
Linked Installation............................................................................................................................9
Connections...................................................................................................................................10
Block Diagram ..............................................................................................................................12
Specifications ................................................................................................................................13
Service
Procedures....................................................................................................................................14
Schematic.....................................................................................................................................14
Parts List .......................................................................................................................................14
Variations and Options ...............................................................................................................14
Warranty .......................................................................................................................................14

1
HD-100
REFERENCE AMPLIFIER
Warning
Warning
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
*Do not install this equipment in a confined space such as a book case or similar unit.
*The apparatus shall not be exposed to dripping or splashing and no objects filled with liquids, such vases, shall be placed on the apparatus.
*Worded: “WARNING FOR YOUR PROTECTION PLEASE READ THE FOLLOWING-WATER AND MOISTURE: Unit should not be used
near water(e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken
so than objects do not fall and liquids are not spilled into the enclosure through openings.”
This symbol is intended to alert the user to the
presence of uninsulated “dangerous voltage” within
the product’s enclosure that may be of suf-ficient
magnitude to constitute a risk of electric shock to
persons.
This symbol is intended to alert the user to the
presence of important operation and mainte-nance
(servicing) instructions in the literature accompanying
the appliance.
Caution: To prevent electric shock do not use this (polarized) plug with
an extension cord, receptacle or other outlet unless the blades
can be fully inserted to prevent blade expo-sure.
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette
fiche polarisée avec un prolongateur, une prise de courant
on une autre sortie de courant, sauf si les lames peuvent
étre insérées à fond sans en laisser aucune partie à
découvert.

2HD-100
REFERENCE AMPLIFIER
Unpacking
Please take a few minutes to read this manual to familiarize yourself with important information regarding
installation, product features, and operation.
As with most electronic devices, ORIGINAL PACKAGING (OR EQUAL) IS REQUIRED in the unlikely event that
the product needs to be returned for servicing.
Short Form Instructions
1. Do not connect the AC power until step 6. The POWER switch should be in the OFF position.
2. Adjust both of the LEVEL controls to the fully attenuated position (turn counter-clockwise).
3. Connect an appropriate line level input signal to either the balanced XLR or the balanced 1/4" TRS (Tip-Ring-
Sleeve) connector marked INPUTS.
4. Move the MODE selector to the desired position. The Stereo position is the most common.
5. Connect the OUTPUTS to the speaker load according to the mode of operation determined in the previous step.
6. With the power switch in the OFF position, plug in the supplied Universal AC power cord to the product and
an appropriate AC source.
7. Depress the power switch to the ON position. The power switch will illuminate.
8. The product is ready for operation. Slowly increase the LEVEL control to the desired operating level. Avoid
illuminating the PEAK indicator and do not apply too much power to the speakers.
9. Operate the product and the system in a manner which DOES NOT illuminate the PEAK warning indicator.

3
HD-100
REFERENCE AMPLIFIER
Installation
Installation
Environment
Never place this product in an environment which could alter its performance or reduce its service life. Such
environments usually include high levels of heat, dust, moisture, and vibration.
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. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and
the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. 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.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate normally, or has
been dropped.
S3125A
S3125A

4HD-100
REFERENCE AMPLIFIER
Description
Description
- A 2U rack space, 2 channel amplifier capable of 300W into 8Ωload (bridged mono).
Features
Features
- 4Ωstable per channel (stereo), 8Ωstable (bridge mono)
- 2U rack space
- Front panel indicators for signal strength, clip, protect, and power
- Rack Ears for permanent installation in a standard 19” (rack mount width) enclosure.
- Detachable AC power cord
Accessories
One detachable AC power cord is provided for use with this product.

5
HD-100
REFERENCE AMPLIFIER
Front Panel
Front Panel
1. LEVEL CONTROL
This determines the level of the input signal for each channel. In stereo mode the knobs will determine the
signal level independently for each channel. In the bridge mono mode only the channel 1 level control is used.
2. SIGNAL INDICATOR
This indicates the level of the input signal. This should be illuminated during normal operation.
3. CLIP INDICATOR
This LED warns of a problem in the system when illuminated. Reduce the LEVEL of the device which supplies
signal to the amplifier or reduce the LEVEL control(s) on the amplifier. This LED should not be illuminated
during normal operation.
4. PROTECTION INDICATOR
This LED warns of a problem in the system when illuminated. Reduce the volume and look for problems. It is
possible that the amplifier is too hot or the speaker impedance is too low. This LED should not be illuminated
during normal operation.
5. POWER INDICATOR
This LED indicates the amplifier is switched ON and receiving AC POWER when illuminated.
6. POWER SWITCH
The position of this switch determines whether the power is ON or OFF. The power-on status is confirmed by
the power indicator. Amplifiers are always the last item in a system to be turned on. It is a good idea to turn
down the level controls before applying AC mains power.
7. HANDLE
Handles are provided for moving and installing into equipment enclosures or racks.
POWER
OFF
ON
TECHNOLOGY
TM
HD-100

6HD-100
REFERENCE AMPLIFIER
Rear Panel
Rear Panel
1. BALANCED INPUT CONNECTORS
Each input channel is equipped with a 1/4" TRS and an XLR connector. Standard rules of interconnect apply.
2. MODE SELECTOR SWITCH
Move this switch to select either the STEREO or BRIDGED MONO position as needed for the application.
The Stereo mode is most common. Channel 1 input feeds the channel 1 output. The channel 2 input feeds the
channel 2 output.
The Bridge Mono mode combines both channels to create one larger mono channel. Input signal applied to
channel 1 will be available across the positive terminals of Channel 1 and channel 2. Do not connect the
channel 2 input or any of the negative outputs.
3. OUTPUT CONNECTORS
Binding Posts and Locking speaker connectors are provided. Bridged Mono operation requires a different
method of connecting the cables than Stereo operation. Be sure than the amplifier is in the correct mode
before connecting the speaker load.
4. FUSE
The fuse protects the amplifier by opening the circuit for the AC mains power in case of overload or
malfunction. If the fuse opens, the amplifier (and the various other components in the system) should be checked
for proper operation. If the fuse continues to open after verifying that the system is wired correctly and that an
overload has not occurred, the amplifier should be checked for proper operation by a service technician.
5. AC INPUT
Connect this product to an appropriate AC power source using the supplied Universal AC Power Cord.
TO REDUCE THE RISK
OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER SERVICEABLE
PARTS INSIDE. REFER
SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION
CAUTION
TO REDUCE THE RISK OF
FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
UTILISER UN FUSIBLE
DE RECHANGE DE
MEME TYPE.
CHANNEL 1
INPUT
BALANCED
0dBm
CHANNEL 2
BALANCED
0dBm
INPUT OUTPUT CHANNEL 1CHANNEL 2
(4 ~8 ) (4 ~8 )
(4 ~8 ) (4 ~8 )
BRIDGED
MONO
(8 ~16 )
123
45
TECHNOLOGY
TM
REFERENCE AMPLIFIER
RATED OUTPUT 150W/CH @4 Ω STEREO
RATED OUTPUT 300W @8 Ω BRIDGED MONO
MODEL NO. HD-100

7
HD-100
REFERENCE AMPLIFIER
Applications-1
Applications-1
TO REDUCE THE RISK
OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER SERVICEABLE
PARTS INSIDE. REFER
SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION
CAUTION
TO REDUCE THE RISK OF
FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
UTILISER UN FUSIBLE
DE RECHANGE DE
MEME TYPE.
CHANNEL 1
INPUT
BALANCED
0dBm
CHANNEL 2
BALANCED
0dBm
INPUT OUTPUT CHANNEL 1CHANNEL 2
(4 ~8 ) (4 ~8 )
(4 ~8 ) (4 ~8 )
BRIDGED
MONO
(8 ~16 )
AUDIO MIXER
CASSETTE DECK
SPEAKERSPEAKER
MIC
ON
AMP MODE
BRIDGED
STEREO
TECHNOLOGY
TM
REFERENCE AMPLIFIER
RATED OUTPUT 150W/CH @4 Ω STEREO
RATED OUTPUT 300W @8 Ω BRIDGED MONO
MODEL NO. HD-100
STEREO INSTALLATION

8HD-100
REFERENCE AMPLIFIER
Applications-2
Applications-2
TO REDUCE THE RISK
OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER SERVICEABLE
PARTS INSIDE. REFER
SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION
CAUTION
TO REDUCE THE RISK OF
FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
UTILISER UN FUSIBLE
DE RECHANGE DE
MEME TYPE.
CHANNEL 1
INPUT
BALANCED
0dBm
CHANNEL 2
BALANCED
0dBm
INPUT OUTPUT CHANNEL 1CHANNEL 2
(4 ~8 ) (4 ~8 )
(4 ~8 ) (4 ~8 )
BRIDGED
MONO
(8 ~16 )
AMP MODE
BRIDGED
STEREO
AUDIO MIXER
CASSETTE DECK
SPEAKER
MIC
ON
TECHNOLOGY
TM
REFERENCE AMPLIFIER
RATED OUTPUT 150W/CH @4 Ω STEREO
RATED OUTPUT 300W @8 Ω BRIDGED MONO
MODEL NO. HD-100
BRIDGED MONO INSTALLATION

9
HD-100
REFERENCE AMPLIFIER
Applications-3
Applications-3
TO REDUCE THE RISK
OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER SERVICEABLE
PARTS INSIDE. REFER
SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION
CAUTION
TO REDUCE THE RISK OF
FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
UTILISER UN FUSIBLE
DE RECHANGE DE
MEME TYPE.
CHANNEL 1
INPUT
BALANCED
0dBm
CHANNEL 2
BALANCED
0dBm
INPUT OUTPUT CHANNEL 1CHANNEL 2
(4 ~8 ) (4 ~8 )
(4 ~8 ) (4 ~8 )
BRIDGED
MONO
(8 ~16 )
TO REDUCE THE RISK
OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER SERVICEABLE
PARTS INSIDE. REFER
SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION
CAUTION
TO REDUCE THE RISK OF
FIRE REPLACE ONLY WITH
SAME TYPE FUSE.
UTILISER UN FUSIBLE
DE RECHANGE DE
MEME TYPE.
CHANNEL 1
INPUT
BALANCED
0dBm
CHANNEL 2
BALANCED
0dBm
INPUT OUTPUT CHANNEL 1CHANNEL 2
(4 ~8 ) (4 ~8 )
(4 ~8 ) (4 ~8 )
BRIDGED
MONO
(8 ~16 )
SPEAKER
SPEAKERSPEAKER
AMP MODE
BRIDGED
STEREO
AMP MODE
BRIDGED
STEREO
TECHNOLOGY
TM
REFERENCE AMPLIFIER
RATED OUTPUT 150W/CH @4 Ω STEREO
RATED OUTPUT 300W @8 Ω BRIDGED MONO
MODEL NO. HD-100
TECHNOLOGY
TM
REFERENCE AMPLIFIER
RATED OUTPUT 150W/CH @4 Ω STEREO
RATED OUTPUT 300W @8 Ω BRIDGED MONO
MODEL NO. HD-100
LINKED INSTALLATION
Linking works with stereo or bridged mono operation

10 HD-100
REFERENCE AMPLIFIER
Connections
Connections
Inter-M products are wired to reflect accepted wiring practices used throughout the world.
Balanced XLR connectors are wired as described:
Pin #1 Shield
Pin #2 Positive
Pine #3 Negative
Balanced 1/4" TRS connectors are wired as described:
Tip is Positive
Ring is Negative
Sleeve is Shield
Insert Points
Amp/Line Input
Headphones
Unbalanced
Input/Output
AUX Send
Ring
Ring
Tip
Tip Sleeve
Sleeve
Send
Return
Screen
Hot (positive)
Cold (negative)
Screen
Left Signal
Right Signal
Ground
Signal
Ground
3 Pole (Stereo) Jack
2 Pole (Mono) Jack
Ring TipSleeve
TipSleeve
2
1
3
Balanced Input
Hot (positive)
Hot (positive)
Sleeve
Screen
Cold (negative)
Cold (negative)

11
HD-100
REFERENCE AMPLIFIER
Stereo operation uses one positive and one negative terminal from the same channel.
Bridged Mono uses the Positive terminals from both channels, the negative terminals have no connection.
Bridged Mono operation has an impedance limitation of 8Ω.
Locking Speaker Connector
Pin set #1
Wiring Diagram
AMP OUTPUT CH1/CH2
1- 1+
2+ 2-
Negative
Positive
or
CH1 CH2
1- 1+
2+ 2-
BRIDGED MONO
Negative NegativePositivePositive
BRIDGED MONO
NOT CONNECTED 1- 1+
2+ 2-
NOT CONNECTED
OUTPUT CHANNEL 1CHANNEL 2
(4 ~8 ) (4 ~8 )
(4 ~8 ) (4 ~8 )
BRIDGED
MONO
(8 ~16 )
Positive
Negative
Positive
Negative
CH2 CH1
OUTPUT CHANNEL 1CHANNEL 2
(4 ~8 ) (4 ~8 )
(4 ~8 ) (4 ~8 )
BRIDGED
MONO
(8 ~16 )
PositiveNegative
STEREO CONNECTION
BRIDGED MONO CONNECTION

12 HD-100
REFERENCE AMPLIFIER
Block Diagram
Block Diagram

13
HD-100
REFERENCE AMPLIFIER
Specifications
Specifications ........................0dB=0.775 Vrms, Half Power=1/2 Power Output Level (Rated Power)
* Specifications and design subject to change without notice.
HD-100
Power Output Level
STEREO 8Ω(T.H.D 0.5%) 100W
4Ω(T.H.D 0.5%) 150W
BRIDGED MONO 8Ω(T.H.D 0.05%) 300W
8Ω(T.H.D 0.5%) 330W
Frequency Response 20Hz~20kHz(±0.5dB)
T.H.D (20Hz~20kHz, half power) ≤0.1%
Channel Separation (half power 8Ω)≥70dB
Residual Noise ≤-80dB
Signal to Noise Ratio ≥100dB
Input Sensitivity (rated power into 4Ωat 1kHz) 0dBm
Indicators Function Color
Power GREEN
Clip/Limiter RED
Signal GREEN
Protection RED
Protection Power ON/OFF muting, short circuit and thermal
Power Source AC 120V 60Hz
Power Consumption 2.4A
Weight 8.4kg/18.5lb
Dimensions 482mm/19in(W) x 88mm/3.5in(H) x 317mm/12.5in(D)

REFERENCE AMPLIFIER
14 HD-100
Service
Service
Procedures
Take steps to insure the problem is not related to operator error or other products within the system. Information
provided in the troubleshooting portion of this manual may help with this process. Once it is certain that the
problem is related to the product contact your warranty provider as described in the warranty section of this
manual.
Schematic
A Schematic is available by contacting your warranty provider.
Parts List
A Parts List is available by contacting your warranty provider.
Variations and Options
Variations and Options
Variations
Products supplied through legitimate sources are compatible with local AC power requirements.
Options
No optional items are available for this product.
Warranty
Warranty
Warranty terms and conditions vary by country and may not be the same for all products. Terms and conditions
of warranty for a given product may be determined first by locating the appropriate country which the product
was purchased in, then by locating the product type.
To obtain specific warranty information and available service locations contact Audioplex directly.

MADE IN CHINA
February 2005 900