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A 52
User Manual
21 pgs1.03 Mb0

Parasound A 52 User Manual

A 52 Amplifier
Owner’s Guide
THANK YOU!
Congratulations and Thank You for Choosing Parasound
Your new Parasound Halo Series A 52 power amplifier presents the latest advancements in amplifier technology. The A 52 is built to the strict quality and performance standards set by Parasound. We’re proud to offer you this exceptional audio component that will bring you many years of enjoyment and dependability.
If you’re eager to get up and running right away, simply follow the basic step-by-step instruc­tions to connect and operate the A 52. If you want to learn about some of the technical and design aspects of your A 52, refer to the Technically Speaking and Parasound A 52 Design Overview sections in the back of the manual. If you run into difficulties, the Troubleshooting Guide should help you quickly remedy the problem.
We appreciate you taking the time to read these instructions and thank you for selecting Parasound for your listening pleasure.
The Parasound Staff
Unpacking Your A 52
Unpack your A 52 from the shipping carton, remove the AC power cord and the control wire with a 2.5 mm sub-mini plug on each end. (This is the trigger connection wire). While you are unpacking your new amplifier, inspect it thoroughly for possible shipping damage. If you see any, contact your Parasound dealer right away. Be sure to save and store both the inner and outer cartons and the packing inserts for possible future transport. To save room for storage, you can cut the seams on the bottom of the cartons and flatten them.
Keeping Records for Future Reference
Record the serial number located on the bottom of your A 52 in the space below. Also note your Parasound Dealer’s name and phone number. We recommend that you keep your purchase receipt with this manual and store them both in a safe place. You may need to refer to this information sometime in the future.
Parasound A 52 Amplifier Serial #: __________________________________________________
Parasound Dealer: ________________________________________________________________
Phone Number: __________________________________________________________________
Date of Purchase: ________________________________________________________________
YOU SHOULD KNOW
There is no Parasound warranty for this unit if it was not purchased from an Authorized Parasound Dealer. Investigate any warranty claims made by unauthorized dealers very carefully as you will need to depend entirely upon the dealer, and NOT upon Parasound. Unauthorized dealers may lack the capability to arrange repairs of Parasound equipment. Authorized Parasound Dealers are listed at www.parasound.com or you can call 415-397-7100 between 8:30 am and 4:30 pm Pacific time.
A missing or tampered serial number could indicate that this unit was stolen or sold by an unauthorized dealer. If this unit is missing its serial number, you should return it to your dealer immediately for a full refund.
TABLE OF CONTENTS
A 52 Amplifier
PLACEMENT GUIDELINES FOR YOUR A 52 2
CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 52 3
CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 52 4
CONNECTING YOUR SPEAKERS TO THE A 52 5
MANUAL AND AUTOMATIC TURN ON-OFF OPTIONS 6
CONNECTING AN EXTERNAL DC SOURCE FOR AUTOMATIC ON-OFF 7
CONNECTING THE A 52 TO TRIGGER ANOTHER COMPONENT 8
UNDERSTANDING THE INDICATORS ON THE A 52 9
CONNECTING THE AC POWER CORD 10
MAINTAINING YOUR A 52 11
TROUBLESHOOTING GUIDE 12
SERVICING YOUR A 52 13
TECHNICALLY SPEAKING 14
PARASOUND A 52 DESIGN OVERVIEW 16
PARASOUND A 52 SPECIFICATIONS 18
PLACEMENT GUIDELINES FOR YOUR A 52
Power amplifiers are usually heavier and generate more heat than other components. To avoid damage to the A 52 or other equipment and to reduce risk of fire, you must follow these guidelines:
•
Place the A 52 on a separate shelf that will adequately support its weight.
•
Keep it away from heat sources such as air ducts or radiators.
•
Avoid placing it on carpeting or another material that might obstruct airflow into the openings in the chassis bottom.
•
Leave at least 3" of space around both sides and 6" of space above the top. The bottom clearance can be a little less.
•
Do not block the front of the A 52 behind closed cabinet doors during use.
•
Do not stack the A 52 with other components inside a cabinet unless you use a fan to circulate and exhaust the warm air that builds up between them.
Rack Mounting Your Parasound A 52
To mount the A 52 into a 19" wide equipment rack, you must first attach its HRA 3 rack mount brackets (not included). With its four feet removed, the A 52 chassis and front panel height occu­pies three rack spaces (51⁄4" or 133 mm). When mounting equipment below the A 52, you will also need to allow about 1⁄8" below the unit for the bottom chassis screws. A single standard rack space allows 13⁄4" vertical height in a 19" wide equipment rack. This measurement standard was developed by the EIA (Electronic Industries Association) so manufacturers of electronic compo­nents and equipment racks could build products in standardized heights that would fit in a uniform space. Please call your Parasound dealer or Parasound Technical Services if you need additional advice about rack mounting the A 52.
To attach the rack mount brackets:
•
Remove the two screws from each side of the A 52’s top cover.
•
Line up the two holes on each HRA 3 bracket with these holes on the A 52 and attach the brackets with the longer screws that are in the bracket kit.
•
Make sure the screws are tight because they will support the entire weight of the A 52 in the equipment rack.
2
HRA 3 Rack Bracket
On-Off
LU CA SF I LM
Hi Temp
CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 52
Left and Right Balanced Input Jacks
Balanced connections will give you the best sound. If your surround controller has balanced XLR output jacks, we recommend that you connect them to these inputs. Refer to the Balanced and Unbalanced Lines in the Technically Speaking section for additional information about why we recommend using balanced lines.
What You’ll Need:
•
Five balanced interconnect cables with XLR connectors
•
A surround controller with balanced output connectors
Before Connecting
❑ Leave the A 52’s AC cord disconnected until you have made all other connections to prevent
any surprise burst of sound.
❑ Make sure that all your cables are long enough so they are not strained or stretched
once they are connected.
❑ Make sure the Balanced - Unbalanced Inputs selector switch on the rear of the A 52 is
in its Balanced (upper) position. The Ground switch should be in its Normal (lower) position.
To Connect
1 Plug the male end of the first balanced interconnect cable into the Balanced Ch 1 input
jack on the A 52.
2
Plug the female end of the cable into the balanced output jack for the channel on your surround controller that you wish to correspond to Ch 1 on your A 52.
3 – 0 Repeat steps 1 and 2 above to connect Ch 2, Ch 3, Ch 4, and Ch 5.
3
YOU SHOULD KNOW Balanced XLR Jacks and Their Pin Configuration
The balanced inputs of the A 52 use XLR jacks that conform to the industry standard of: Pin 1: Ground, Pin 2: Positive (+), Pin 3: Negative (–). The balanced outputs on some com­ponents use terminals with 3 screws instead of XLR jacks. These are compatible with the A 52 as long as you match the bare wires to the corresponding pins on the XLR plug: + to pin 2, - to pin 3, and Ground to pin 1.
XLR Connectors
Male
Female
SURROUNDŁ CONTROLLER
OUTPUTS
Ch 1 Ch 2 Ch 3 Ch 4 Ch 5
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Man
Balanced
Inputs
Unbalanced Input 12 VOutput
Audio Sensitivity
50 mV 250
Ground
Normal
Lift
WARNING
To Prevent Fire Or Shock Hazard, Do Not Expose This Unit To Rain
Or Moisture.
Fuse
T15A/250V1-115V Area T8A/250V-230V Area
AC 115V 60Hz AC 230V 50Hz
Power Consumption: 1350W
Parasound Products, Inc. San Francisco, CA USA
Manufactured under license from Lucasfilm Ltd. Lucasfilm and THX
are registered Trademarks
of Lucasfilm Ltd.
CAUTION
To Prevent Electric Shock, Do Not
Remove Cover. No User-Serviceable
Parts Inside, Refer Servicing To
Qualified Service Personnel.
Auto Turn On
L UC A S FI LMLM
1 3 5 7 9
2 4 6 8 10
Ground Switch, set to down position
Inputs Switch, set to up position
CONNECTING A SURROUND CONTROLLER
TO THE UNBALANCED INPUTS ON YOUR A 52
4
Ch 1-5 Unbalanced Inputs
Use these inputs if your surround controller doesn’t have balanced output connectors or if you simply prefer to use unbalanced connections.
What You’ll Need:
•
Five shielded interconnect cables with RCA plugs
•
A surround controller with five RCA output jacks
Before Connecting
❑ Leave the AC cord on the A 52 disconnected until you have made all other connections
to prevent any surprise burst of sound.
❑ Make sure that all your cables are long enough so they are not pulled or stretched
once they are connected.
❑ Make sure the Balanced-Unbalanced Inputs selector switch on the A 52 is in its
Unbalanced (lower) position and the Ground switch is in its Normal (lower) position.
To Connect
1 Plug one end of the cable into the Unbalanced Ch 1 Input jack on the A 52. 2 Plug the other end of the cable into the unbalanced output jack for the channel
on your surround controller that you wish to correspond to Ch 1 on your A 52.
3
– 0 Repeat steps 1 and 2 for Ch 2, Ch 3, Ch 4, and Ch 5.
YOU SHOULD KNOW Write Down Your Connections
Make a note of which channel on your surround controller now connects to each channel of the A 52 so you’ll always hear the channels in their intended position and to facilitate trouble-shooting in case you encounter a problem later on.
SURROUNDŁ CONTROLLER
OUTPUTS
2 4 6 8 10
Ch 1 Ch 2 Ch 3 Ch 4 Ch 5
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Man
Balanced
Inputs
Unbalanced Input 12 VOutput
Audio Sensitivity
50 mV 250
Ground
Normal
Lift
WARNING
To Prevent Fire Or Shock Hazard, Do Not Expose This Unit To Rain
Or Moisture.
Fuse
T15A/250V1-115V Area T8A/250V-230V Area
AC 115V 60Hz AC 230V 50Hz
Power Consumption: 1350W
Parasound Products, Inc. San Francisco, CA USA
Manufactured under license from Lucasfilm Ltd. Lucasfilm and THX
are registered Trademarks
of Lucasfilm Ltd.
CAUTION
To Prevent Electric Shock, Do Not
Remove Cover. No User-Serviceable
Parts Inside, Refer Servicing To
Qualified Service Personnel.
Auto Turn On
L UC A S FI LMLM
1 3 5 7 9
Ground Switch, set to down position
Inputs Switch, set to down position
RCA Plugs
CONNECTING YOUR SPEAKERS TO THE A 52
5
Stripped AWG wire
Dual
Banana Plug
Common Speaker Connectors
Single
Banana Plug
Spade Lug
Speaker Terminals
The A 52 speaker terminals accept speaker wires with banana plugs, spade lugs, or bare ends. Refer to Bare Wire Speaker Termination in the Technically Speaking section for information about bare wire termination.
What You’ll Need:
•
Five lengths of AWG 16 or thicker speaker wire with banana plugs, spade lugs, or bare ends
•
Five loudspeakers
Before Connecting
❑ Remove power to all the components in your audio system.
To Connect
When connecting your speakers you need to keep in mind which channel of the A 52 you connected to each channel on your surround controller. You can write these down on page 10.
1
Insert one wire with the ridge or other marking into the red Ch 1 + (positive) speaker terminal on the A 52. Insert the wire without the ridge or other marking into the black Ch 1 - (negative) speaker terminal.
2
Insert the other end of the wire with the ridge or other marking to the red + (positive) terminal on the speaker. Insert the other end of the wire without the ridge or other marking to the adjacent black – (minus) terminal on the speaker.
3
– 0 Repeat steps 1 and 2 for Ch 2, then Ch 3, then Ch 4, and finally Ch 5.
YOU SHOULD KNOW Correct Speaker Polarity is Important
Polarity refers to + and – connections. Speaker wires are coded with printing or a ridge on the insulation on one of the leads so you know which lead was connected to the + and – terminals at the other end. This coding will help you keep the + and - polarity consistent for all channels.
Speaker Wire Length and Gauge (thickness)
When selecting speaker wire, follow these guidelines:
• Keep the length of your speaker wire as short as possible.
• Use the thickest wire practical. For lengths greater than 50 feet, use speaker wire
with an AWG (gauge) of 14 or lower. The smaller the AWG, the thicker the wire.
• Do not use speaker wire that is thinner than 16 AWG.
• Keep wire lengths for both channels as close to equal as possible.
2
SPEAKERS
1 3 5 7 9
2 4 6 8 10
Ch 1 Ch 2 Ch 3 Ch 4 Ch 5
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Input
Balanced
Unbalanced
Man
Balanced
Inputs
Unbalanced Input 12 VOutput
Audio Sensitivity
50 mV 250
Ground
Normal
Lift
WARNING
To Prevent Fire Or Shock Hazard, Do Not Expose This Unit To Rain
Or Moisture.
Fuse
T15A/250V1-115V Area
T8A/250V-230V Area
AC 115V 60Hz AC 230V 50Hz
Power Consumption: 1350W
Parasound Products, Inc. San Francisco, CA USA
Manufactured under license from Lucasfilm Ltd. Lucasfilm and THX
are registered Trademarks
of Lucasfilm Ltd.
CAUTION
To Prevent Electric Shock, Do Not
Remove Cover. No User-Serviceable
Parts Inside, Refer Servicing To
Qualified Service Personnel.
Auto Turn On
L UC A S FI LMLM
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