Manual de instrucciones de Parasound A 52

Manual de instrucciones del aparato Parasound A 52

Aparato: Parasound A 52
Categoría: Amplificador estéreo
Fabricante: Parasound
Tamaño: 1.03 MB
Fecha de añadido: 1/30/2014
Número de páginas: 21
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Resumen del contenido incluido en la página 1

A 52 Amplifier
Owner’s Guide

Resumen del contenido incluido en la página 2

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

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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

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2 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. • Leav

Resumen del contenido incluido en la página 5

CONNECTING A SURROUND CONTROLLER 3 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: Male • Five balanced interconnect cables with XLR connectors

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RCA Plugs CONNECTING A SURROUND CONTROLLER 4 TO THE UNBALANCED INPUTS ON YOUR A 52 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

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5 CONNECTING YOUR SPEAKERS TO THE A 52 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. Common Speaker Connectors What You’ll Need: • Five lengths of AWG 16 or thicker speaker wire with banana plugs, spade lugs, or bare ends Dual Single Spade Lug Stripped • Five loudspeakers Banana Plug Banana Plug AWG wire Befor

Resumen del contenido incluido en la página 8

6 MANUAL AND AUTOMATIC TURN ON-OFF OPTIONS You can manually turn the A 52 on and off with its front panel On-Off button. It can also be triggered to turn on and off automatically when your preamplifier, surround controller, or system controller is turned on and off. Manual On-Off from the Front Panel If you want to manually turn on and off the A 52 at any time, you need to first select the Manual On- Off option by placing the Auto T urn On switch (on the rear panel) to its middle Man (Manual) po

Resumen del contenido incluido en la página 9

CONNECTING AN EXTERNAL DC SOURCE FOR 7 AUTOMATIC TURN ON-OFF To automatically turn on and off the A 52 with an external DC voltage, choose the DC Triggering option by moving the Auto Turn On switch on the rear panel to its lower 12V position. What You’ll Need: • A cable with a 2.5 mm sub-mini plug on each end (provided) • A “control” component with +9Vdc to +12Vdc trigger voltage 2.5 mm sub-mini plug Before Connecting ❑ Remove Power to all the components in your audio system. ❑ Make sure the Au

Resumen del contenido incluido en la página 10

8 CONNECTING THE A 52 TO TRIGGER ANOTHER COMPONENT Whenever the A 52 is turned on either manually or automatically, there is 12 Vdc present at its own DC Trigger Out jack so it can trigger additional amplifiers or other components on and off. What You’ll Need: • A wire with a 2.5 mm sub-mini plug on each end (in addition to the wire provided with the A 52) • A component that can be triggered with an external +9 Vdc to +12 Vdc 2.5 mm sub-mini plug source. The A 52 DC trigger output provides up

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9 UNDERSTANDING THE INDICATORS ON THE A 52 a AC Present Indication When the A 52 is plugged into a live AC outlet, a soft blue halo glows behind its On-Off button and its red “P” Badge glows faintly. These indicate that the unit is plugged into a live AC outlet, even when it is turned off. b On, Off and Fault/Protection Status Indicators Whenever the A 52 is turned on, the soft blue glow behind its On-Off button will change to red for about five seconds as its internal circuits stabilize. The

Resumen del contenido incluido en la página 12

10 CONNECTING THE A 52 AC POWER CORD AC Power Connections We recommend that you plug your A 52 into the same AC wall outlet or power strip that pow- ers your other audio components, especially the preamplifier or system controller. Having all the audio components on the same power circuit helps prevent hum caused by possible ground loops. The A 52 requires AC power that is continuous rather than switched on and off. 110 V - 120 V or 220 V - 240 V Operation The A 52 can operate on either 110 V

Resumen del contenido incluido en la página 13

11 MAINTAINING YOUR A 52 Your Parasound A 52 power amplifier requires no periodic maintenance and has no user- serviceable parts inside. To avoid 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 Fuse If this fuse blows, please contact Parasound Technical Service for further advice. Notes:

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12 TROUBLESHOOTING GUIDE TROUBLE PROBABLE CAUSE REMEDY Power cord is disconnected Connect power cord to a live AC outlet No power Auto Turn On selector switch Check for correct position of the Auto is in wrong position Turn On switch AC fuse blown Replace with same value fuse Auto turn on doesn’t DC trigger source wired in Check polarity of DC source with a voltmeter. function with a trigger reverse or voltage too low Try connecting a 9V battery to the 12V DC input voltage Auto Turn On selecto

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13 SERVICING YOUR A 52 If All Else Fails –Call Us for Help Call your Parasound dealer or Parasound’s Technical Service Department toll free at 1-866-770-TECH (8324). We can often solve the problem with simple diagnostic tests you can perform yourself. If we determine that your A 52 will need further inspection or servicing, we will: a) Refer you to an authorized Parasound repair center near you, or b) Authorize return of the unit to us and advise you of the correct procedure. Procedure for Re

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14 TECHNICALLY SPEAKING A differential input circuit amplifies only the difference Audio Trigger Sensitivity Adjustment between the positive and negative signals. For exam- The Audio Sensitivity Control sets the threshold of the ple, when a 1 Volt signal arrives at a balanced input audio trigger signal. You can adjust this level from a stage, the differential input “sees” a positive 1 Volt maximum sensitivity of 50 mV (fully counterclockwise) minus a negative 1 Volt, or 2 Volts total. External h

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15 TECHNICALLY SPEAKING continued The ideal of zero voltage ground for all the compo- 2. When rack mounting, always use insulated “shoul- nents in a system is practically impossible, because der” washers. These break the ground loops caused some resistance between the ground points of differ- by metal-to-metal contact between the rack, the ent components is inevitable. By keeping components components, and their rack-mount bolts. Extra wash- close together with their power cords plugged into a e

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16 PARASOUND A 52 DESIGN OVERVIEW electrolytic filter capacitors, chosen for their low Circuit Designed by John Curl Equivalent Series Resistance (ESR) and dielectric Parasound design consultant John Curl has been a absorption. In addition, these filter capacitors are legend among audiophiles and electronic engineers for bypassed with smaller polypropylene capacitors to decades. He pioneered measurements to correlate reduce AC ripple in the DC supply and to further musical accuracy with the ma

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17 PARASOUND A 52 DESIGN OVERVIEW continued The Driver Stage Total Protection - DC Servos The driver stage provides critical amplification for Direct Current (DC) burns out speakers. Every power which we employ a complementary matched pair of amplifier must have some way to insure that DC from MOSFETs selected for their tube-like sonic qualities. its power supply never reaches its + or - speaker MOSFETs tend to generate less odd-order harmonic terminals. Most amplifiers simply use trim controls

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18 PARASOUND A 52 SPECIFICATIONS Power Output - All Channels Driven Input Sensitivity for 28.28 V Output into 8 W 125 watts RMS x 5, continuous, Unbalanced: 1 V 20 Hz - 20 kHz, 8W Balanced: 1 V per leg 225 watts RMS x 5, continuous, S/N Ratio 20 Hz - 20 kHz, 4W > 113 dB, input shorted, IHF A-weighted > 104 dB, input shorted, unweighted Current Capacity 30 amperes peak per channel Damping Factor > 1000 at 20 Hz Slew Rate > 130 volts per microsecond DC Trigger Requirements +9 Vdc to +12 Vdc, 2 mA


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