background image

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.

Here at Parasound, we design our products to perform at a higher level of flexibility and sonic
performance than you may have expected. We encourage you to read this entire manual to
learn all the features and capabilities of your new Halo Series A 52 Amplifier.

If you’re eager to get up and running right away, simply follow the basic step-by-step instruc-
tions 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.

Summary of Contents for Halo A 52

Page 1: ...A 52 Amplifier Owner s Guide...

Page 2: ...le 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...

Page 3: ...ING 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...

Page 4: ...h its HRA 3 rack mount brackets not included With its four feet removed the A 52 chassis and front panel height occu pies three rack spaces 51 4 or 133 mm When mounting equipment below the A 52 you wi...

Page 5: ...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...

Page 6: ...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...

Page 7: ...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 ot...

Page 8: ...ses between tracks 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 Unbala...

Page 9: ...can cut one plug off the cable and terminate the end as required The lead with the red stripe is positive and the lead without the stripe is negative Output CONTROL COMPONENT 2 1 Ch 1 Ch 2 Ch 3 Ch 4...

Page 10: ...igger output connector you can cut one plug off the cable and terminate the end as required The lead with the stripe is positive and the lead without the stripe is negative CONTROLLED COMPONENT Input...

Page 11: ...resume operation If the A 52 remains in protection after it has cooled down and you ve confirmed there are no external faults it could indicate an internal problem Please contact Parasound s Technica...

Page 12: ...AC Cord provided An AC outlet or high quality AC power strip within reach of the AC cord Before Connecting Remove power to all the components in your audio system To Connect 1 Plug the female end of t...

Page 13: ...void the risk of electric shock do not remove its top cover The amplifier s exterior can easily be cleaned with a soft cloth pre moistened only with a fewdrops of water or glass cleaner Main Power Fus...

Page 14: ...ue fuse Check polarity of DC source with a voltmeter Try connecting a 9V battery to the 12V DC input Make sure Auto Turn On selector switch is in its 12V position Make sure Auto Turn On selector switc...

Page 15: ...ng Units with collect shipping charges Units without a valid RA number Units without a suitable shipping carton Units for which we see or hear evidence of improper packing For a non warranty repair co...

Page 16: ...e equal but 180 degrees out of phase with each other with respect to ground To send and receive balanced signals requires special differential circuitry A differential input circuit amplifies only the...

Page 17: ...c com 3 Use the Ground switch on the A 52 to eliminate most ground loops This separates the A 52 s sig nal input ground from its chassis ground to isolate unwanted voltage in the ground shield of the...

Page 18: ...ere instruments dialogue and effect are positioned Each channel s 60 Vdc B and B supply rails use high speed rectifier diodes and two large 10 000uF electrolytic filter capacitors chosen for their low...

Page 19: ...s A while its output stage operates with higher pure Class A power than many amplifiers selling for twice or three times its price The result is less fatiguing more natural sound Total Protection DC S...

Page 20: ...ance Unbalanced 47k W Balanced 94k W Input Sensitivity for 28 28 V Output into 8 W Unbalanced 1 V Balanced 1 V per leg S N Ratio 113 dB input shorted IHF A weighted 104 dB input shorted unweighted Dam...

Page 21: ...Parasound Products Inc 950 Battery Street San Francisco CA 94111 415 397 7100 Fax 415 397 0144 www parasound com...

Reviews: