AudioSource Digital Amplifier, 2 Channel Stereo Power D Amplifier-Complete Features/User Guide

Feel the energy of our home audio system. An excellent amplifier is essential to a complete soundscape and is the foundation of any outstanding audio system. Construct a home theatre, add an outdoor component to your system, or create a multi-room audio environment. Top-notch amplifiers from AudioSource ensure consistently excellent sound. Two channels of our Power (D) Digital Amplifier AD1002 are capable of producing 50 watts of power into an 8-ohm load. It can produce 75 watts per channel into a 4-ohm load. Bridged to an 8-ohm mono channel are 160 watts. In comparison to other amplifiers, this Class D amplifier uses less energy, generates less heat, and leaves more room on the circuit board for safety features like overheating and overcurrent protection.

Additionally, rack ears are included and mountable. In 1978, AudioSource, a company based in Portland, Oregon, started developing and producing high-quality, reasonably priced, and excellent audio products. Our aim is to deliver value and performance that surpasses your expectations.

FEATURES

MAIN / INTERRUPT priority input switching MAIN auxiliary output
Speaker A/B switching

Front panel Balance and Volume controls Signal sensing “Power On” and Trigger mode
Rear mounted treble and bass controls

Congratulations on your purchase of the AudioSource® AD1002. Please take a few moments to read this entire manual, and be sure to retain this document for future reference. Please read and observe all safety instructions detailed on page 2.

NOTE
If any part of this product is damaged or missing, please call your dealer or AudioSource® directly at 1.877.715.5439 or 503.914.4688. Please read your warranty and retain your receipt and original carton for possible future use. For more information about AudioSource® electronics, speakers and accessories please visit www.audiosource.net

CAUTION
RISK OF ELECTRICAL SHOCK DO NOT OPEN

CAUTION
TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL!

EXPLANATION OF SAFETY SYMBOLS

The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
The lightning ﬂash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products’ enclosure that may be of sufﬁcient magnitude to constitute a risk of electric shock to persons.

IMPORTANT SAFETY INSTRUCTIONS

WARNING
TO PREVENT FIRE OR SHOCK HAZARDS, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. THE APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, SHALL NOT BE PLACED ON THE APPARATUS.

WARNING
TO PREVENT FIRE OF SHOCK HAZARDS, DO NOT USE THIS PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.

WARNING
THE MAINS PLUG IS USED AS A DISCONNECT DEVICE. THE DISCONNECT DEVICE SHALL REMAIN READILY AVAILABLE.

WARNING
ONLY USE ATTACHMENTS OR ACCESSORIES SPECIFIED OR PROVIDED BY THE MANUFACTURER.

Read these instructions.
Keep these instructions.

Heed all warnings.
Follow all instructions.
Do not use this apparatus near water.
Clean only with dry cloth.
Do not block any ventilation openings. The ventilation should not be impeded by covering the ventilation openings with items such as newspaper, table- cloths, curtains etc. Install in accordance with the manufacturer’s instructions.
Do not install near heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. No open flame sources, such as lighted candles, should be placed on the apparatus.
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 third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
Protect the power cord from being walked on or pinched particularly at the plugs, convenience receptacles, and at the point of exit from the apparatus.
Only use attachments/accessories specified by the manufacturer.
Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart or rack is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
Unplug the apparatus during lightning storms or when unused for long periods of time.
Refer all servicing to qualified personnel. Servicing is required when the apparatus has been damaged in any way, such as a power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus have been exposed to rain or moisture, do not operate normally, or has been dropped.
WARNING
To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. The apparatus shall not be exposed to dripping or splashing and that objects filled with liquids, such as vases, shall not be placed on the apparatus.
WARNING: The mains plug/appliance coupler is used as disconnect device, the disconnect device shall remain readily operable.
This equipment is a Class II or double insulated electrical appliance. It is designed in such a way that it does not require a safety connection to the electrical earth.
This lightning flash with an arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of non-insulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock.

Warning
to reduce the risk of electric shock, do not remove the cover (or back) as there are no user-serviceable parts inside. Refer servicing to qualified personnel.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the appliance.

MAGNETIC FIELD:
Do not locate sensitive high-gain equipment such as preampliﬁers or tape decks directly above or below the unit. Because this ampliﬁer has a high power density, it has a strong magnetic ﬁeld, which can induce hum into unshielded devices that are located nearby. The ﬁeld is strongest just above and below the unit. If an equipment rack is used, we recommend locating the ampliﬁer(s) in the bottom of the rack and the preampliﬁer or other sensitive equipment at the top.

FRONT PANEL CONTROLS

Power Switch
Switches the AD1002 on or off. A red LED indicates the connection to AC power while in standby mode. Turns green indicating an audio signal is present.
Speaker Selector
Select speaker zone A or B. For A + B zones push both buttons.
Balance
Fades speaker output between the Right and Left Channels

Volume
Adjusts ampliﬁer volume.

REAR PANEL CONTROLS

Bass and Treble Controls
These controls can adjust bass and treble frequencies +/- 12dB at 100Hz and 10kHz.

Interpreting Line Input
This is the secondary input, use MAIN IN for your main input. INTERRUPTING INPUT can be used if a second source is desired and takes over when signal is present and has at least a 5mV level.
When there is no signal or a signal with less than 5mV level, the amp switches back to MAIN IN after a brief delay.

Main Input/Output
MAIN IN should be used as the “primary” or main input for the ampliﬁer. Connect your receiver or main source to this input. Use MAIN OUT to pass MAIN IN signal to another amplifier.

12V Trigger
Allows the AD1002 to be powered on by other electronics or to power on other electronics via a 3.5mm mini phone plug cable.

Mode Select Switch
Switches the ampliﬁer from Stereo mode to Bridged mode.

STEREO MODE
If you will be connecting one or two pairs of speakers to the ampliﬁer, place the switch in the “Stereo” position. NOTE: For playing 2 pairs of speakers (A plus B), make sure each speaker has an impedance of 8 ohms or greater.

BRIDGED MODE
When set to “Bridged” mode, the ampliﬁer is a single channel mono amplifier. BRIDGED MODE- MONO APPLICATION
For bridged mode, playing Right and Left together as mono output, plug RCA cables in to Right and Left RCA at MAIN input.
Set the MODE switch to BRIDGED and follow the instructions
for bridged speaker connection in the SPEAKER TERMINALS section of this manual.

NOTE
The AD1002 supplies 160W in bridged mode, Please verify that your speakers are capable of handling such power to avoid possible damage! AUTO ON Select Switch Power can be turned on and off manually via the switch on the front panel or automatically by signal sensing. Set it to NORMAL for manual power on/off. Set to AUTO for signal sensing; the amp will turn on when an audio signal is detected at the inputs. NOTE: The front panel ower switch must be in the ON position (pushed in) for the AUTO ON featu e to operate.

Speaker Zone A Output Figure
Rear Panel Speaker output terminals for zone A. Minimum impedance: 8 ohms bridged or 4-ohm stereo.

Speaker Zone B Output
Speaker output terminals for zone B. Minimum impedance: 8 ohms bridged or 4-ohm stereo.

SPEAKER TERMINALS – STEREO MODE
For stereo output connect the speaker’s positive (red) terminal to the ampliﬁer’s positive (red) terminal and the speaker’s negative (black) terminal to the ampliﬁer’s negative (black) terminal for each Right and Left speaker.

SPEAKER TERMINALS – BRIDGED MODE
Place the “MODE” switch in the “BRIDGED” position and use both red terminals to connect to the speaker. Connect the speaker’s positive (red) terminal to the ampliﬁer’s red (+) terminal noted next to the bridging mark, and the speaker’s negative (black) terminal to the ampliﬁer’s unmarked positive
(red) terminal.

NOTE
Only one zone (A or B) can be bridged. Do not attempt to bridge both A and B speaker terminals! This may result in a lower impedance than the ampliﬁer is designed for and may damage your ampliﬁer. The minimum impedance for the total load connected in bridged mode is 8 ohms.

NOTE:
Use Class 2 wiring for speaker connections.
To wire the output connector: 1. Strip the insulation off each speaker wire to expose 3/8″ (10 mm) of bare conductor. 2. Unscrew the output terminal binding post several twists, and insert each wire into the correct terminal. 3. Tighten the binding post by twisting clockwise until it is firmly clamping the speaker wire. Warning: While the amplifier does self-protect under most improper output conditions, misconfiguration of loudspeaker mode and incorrect connection of loudspeakers could damage connected loudspeakers and/or amplifiers. Please refer installation to a qualified installation professional, and always check state and local electrical codes when installing.

NOTE
To prevent sonic degradation in your speaker installation, total speaker wire resistance should be kept below 0.5 ohms. This table lists recommended speaker wire gauge versus wire run length.

50’ or less – 16 Gauge 2-Cond. CL3 Rated

50’ – 150’ – 12 Gauge 2-Cond. CL3 Rated
150’ – 200’ – 10 Gauge 2-Cond. CL3 Rated

Power Cord
This ampliﬁer is conﬁgured for operation at 115V (North America). A fuse located internally protection from fault conditions. Refer to qualified service personel should this need to be replaced.

APPLICATIONS

STEREO SETUP
In this conﬁguration, the mode switch is set to “Stereo”. Connect the line out jacks from a stereo pre-ampliﬁer or source to the MAIN input jacks of your AD1002. Next connect your speakers to the terminals marked “Speaker A” observing proper polarity. Select the “A” speakers using the front panel zone selection buttons. Connect a second (optional) pair of speakers to the terminals marked “Speaker B”. If you are connecting 4 speakers to the AD1002 they must be 8 ohm speakers only. Press A and B together to use both zones.

SETUP FOR MULTIPLE SOURCE
In the multiple sources set up, a distributed audio system is connected to the AD1002 as a local zone ampliﬁer via the MAIN inputs. Normally the distributed audio system will be the audio source for the AD1002. The distributed audio is then passed on to be used by additional zones or sub-zones in the distributed system via the MAIN outputs.

(From Local Source Line Out) (From Pre-amp Line Out) (Out to Additional Zones)
The audio output of a local source, such as an MP3 Player, CD, television, computer, etc., is connected to the AD1002 via the INTERRUPTING inputs, and whenever the local source is active its signal will take priority over the distributed audio signal present at MAIN input. However, the distributed audio signal will still be present at the MAIN input. In this circumstance, the audio output of the local source will be heard via the AD1002. Once the local source is turned off or muted, the AD1002 will automatically switch back to the distributed audio system as an audio source, assuming the local source remains inactive. There is a delay of up to 6 seconds when switching from INTERRUPTING input back to MAIN inputs.

Limited Warranty
AudioSource® warrants its ampliﬁer products against defects in materials and workmanship for a limited period of time. For a period of two years from date of original purchase, we will repair or replace the product, at our option, without charge for parts and labor. Customers must pay all parts and labor charges after the limited warranty period expires. The limited warranty period for factory refurbished products expires after ninety (90) days from the date of original purchase. This limited warranty applies only to purchases from authorized AudioSource® electronics retailers. This limited warranty is extended only to the original purchaser and is valid only to consumers in the United States.

Consumers are required to provide a copy of the original sales invoice from an authorized AudioSource® dealer when making a claim against this limited warranty. This limited warranty only covers failures due to defects in materials or workmanship that occur during normal use. It does not cover failures resulting from accident, misuse, abuse, neglect, mishandling, misapplication, alteration, faulty installation, modiﬁcation, service by anyone other than AudioSource®, or damage that is attributable to Acts of God. It does not cover costs of transportation to AudioSource® or damage in transit. The customer should return his defective product, freight prepaid and insured, to AudioSource® only after receiving a Return Authorization.

This warranty will become void if the serial number identiﬁcation has been wholly or partially removed, altered or erased. Repair or replacement under the terms of this warranty does not extend the terms of this warranty. Should a product prove to be defective in workmanship or material, the consumer’s sole remedies will be repair or replacement as provided under the terms of this warranty. Under no circumstances shall AudioSource® be liable for loss or damage, direct, consequential or incidental, arising out of the use of or inability to use the product. There are no express warranties other than those described above.

Frequently Asked Questions

Does adding a 100w amp to a 200-watt receiver make the total output 300 watts, or does the amp override the receiver?
You cannot really add them together. The 200-watt receiver would be driving different speakers than would the 100-watt amp. Your 200-watt receiver, likely, is 100 watts per channel into 2 channels and this amp is 50 per channel into 2 more channels. You would be driving 2 speakers at 100 watts each and 2 more speakers at 50 watts each. The total system power could be considered as 300 watts, though.

Could I mono power @ 4 ohms a center channel speaker with this in the 4-ohm setting?
I wouldn’t. The bridged output is only for 8 ohms – the amp see 4 ohms per channel, so a 4 ohm bridged load would drop it down to 2 ohms per channel which won’t work (at least for too long before the amp blows). You could add a 10W 4 Ohm resistor in series with the speaker to make it an 8-ohm load, though.
Does it come with a remote?
No, there is no IR port. The system can be set to automatically turn on based on an audio signal or use the trigger ports with a 3.5mm jack.
Can this amplifier power 4 (40 w) ceiling speakers?
It should. I have mine powering an old (very old) Bose 401 system. It has an unpowered subwoofer and two satellite speakers. I works well

Does this amplifier come with the rack mount? What is the quality of the amplifier?
Yes it does come with the brackets to fit a standard rack. A good amplifier depending on your application.

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References

User Manual

AudioSource Digital Amplifier, 2 Channel Stereo Power D Amplifier

Specifications

Introduction