Instruction/ maintenance manual of the product A 52 Parasound
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A 5 2 Amplif ier Owner’ s Guide.
THANK YOU! Congratulations and Thank Y ou for Choosing Parasound Y our new P arasound Halo Series A 52 pow er amplifier presents the latest advancements in amplifier tec hnology . The A 52 is built to the strict qualit y and performance standards set by P arasound.
T ABLE 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 .
PLACEMENT GUIDELINES FOR YOUR A 52 Power amplifiers are usually heavier and generate more heat than other components. T o 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 w eight.
CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 52 Left and Right Balanced Input Jacks Balanced connections will giv e you the best sound. If y our surround controller has balanced XLR output jac ks, we recommend that you connect them to these inputs.
CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 52 4 Ch 1-5 Unbalanced Inputs Use these inputs if your sur round controller doesn ’ t ha ve balanced output connectors or if y ou simply pref er to use unbalanced connections.
CONNECTING YOUR SPEAKERS TO THE A 52 5 Stripped AWG wire Dual Banana Plug Common Speaker Connect ors Single Banana Plug Spade Lug Speaker T erminals The A 52 speaker terminals accept speak er wires with banana plugs, spade lugs, or bare ends.
Y ou 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.
CONNECTING AN EXTERNAL DC SOURCE FOR AUTOMA TIC TURN ON-OFF T o automatically turn on and off the A 52 with an external DC voltage, choose the DC T riggering option by moving the Auto T urn On switch on the rear panel to its lower 12 V position. What Y ou ’ ll Need: • A cable with a 2.
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 T rigger Out jack so it can trigger additional amplifiers or other components on and off. What Y ou ’ ll Need: • A wire with a 2.
a AC Present Indication When the A 52 is plugged into a liv e A C outlet, a sof t blue halo glows behind its On-Of f but ton and its red “ P ” Badge glo ws faintly . These indicate that the unit is plugged into a liv e A C outlet, even when it is t urned off .
CONNECTING THE A 52 AC POWER CORD AC Power Connections W e recommend that you plug y our A 52 into the same A C wall outlet or pow er strip that pow- ers your other audio components, especially the preamplifier or sy stem controller . Having all the audio components on the same pow er circuit helps prev ent hum caused by possible ground loops.
Y our Parasound A 52 power amplifier requires no periodic maintenance and has no user - serviceable parts inside. T o 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 .
TROUBLESHOOTING GUIDE 12 No pow er Auto turn on doesn’ t function with a trigger voltage Auto turn on doesn’ t function with an audio input signal A 52 will not turn of f when audio signal is remo.
If All Else Fails – Call Us for Help Call your P arasound dealer or Parasound ’ s T ec hnical Ser vice Department toll free at 1 -866-770-TECH (8324) .
TECHNICALL Y SPEAKING 14 Audio T rigger Sensitivity Adjustment The Audio Sensitivity Control sets the threshold of the audio trigger signal. Y ou can adjust this lev el from a maximum sensitivity of 50 mV (fully countercloc kwise) to a minimum sensitivity of 250 mV (fully cloc kwise).
TECHNICALL Y SPEAKING continued 15 The ideal of z ero voltage ground for all the compo- nents in a system is practically impossible, because some resistance bet w een the ground points of diff er- ent components is inevitable.
P ARASOUND A 52 DESIGN OVERVIEW 16 Circuit Designed by John Curl P arasound design consult ant J ohn Curl has been a legend among audiophiles and electronic engineers for decades.
P ARASOUND A 52 DESIGN OVERVIEW continued 17 The Driver Stage The driv er stage provides critical amplification for whic h we emplo y a complementar y matc hed pair of MOSFETs selected f or their tube-lik e sonic qualities. MOSFETs tend to generate less odd-order harmonic distortion than bipolar transistors.
P ARASOUND A 52 SPECIFICA TIONS 18 Power Output - All Channels Driven 1 25 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 8 W 225 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 4 W Current Capacity 30 amper.
Parasound Pr oducts, Inc. 950 Batter y Str eet, San Francisco , CA 94111 415-397-7100 / Fax 415-397-0144 www .parasound.com.
An important point after buying a device Parasound A 52 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Parasound A 52 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Parasound A 52 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Parasound A 52 you will learn all the available features of the product, as well as information on its operation. The information that you get Parasound A 52 will certainly help you make a decision on the purchase.
If you already are a holder of Parasound A 52, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Parasound A 52.
However, one of the most important roles played by the user manual is to help in solving problems with Parasound A 52. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Parasound A 52 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
