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Parasound JC 1 Amplifier manual

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Table of contents for the manual

  • Page 1

    JC 1 Amplifier Owner’s Guide[...]

  • Page 2

    1 T H A N K Y O U ! Congratulations and Thank Y ou for Choosing Parasound Y our new Parasound Halo Series JC 1 mono bloc k power amplier represents the latest advancements in amplier tec hnology . The JC 1 was designed by CTC builders and it uses higher quality parts and ac hieves higher performance than any amplier we ’ ve made since P [...]

  • Page 3

    PLACEMENT GUIDELINES FOR YOUR JC 1 _________________________________________________________________________________ CONNECTING A STEREO PREAMPLIFIER OR A SURROUND CONTROLLER TO THE BALANCED INPUT ON YOUR JC 1 _________________________________________________________________________________ CONNECTING A STEREO PREAMPLIFIER OR A SURROUND CONTROLLER [...]

  • Page 4

    PLACEMENT GUIDELINES FOR YOUR JC 1 1 Power ampliers are usually heavier and generate more heat than other components. T o avoid damage to the JC 1 or other equipment and to reduce risk of re, you must follow these guidelines: • Place the JC 1 on a separate shelf that will adequately suppor t its weight. • K eep it away from heat sources s[...]

  • Page 5

    Balanced Input Jack Balanced connections will gi ve you the best sound in most instances. If your preamplier or surround controller has balanced XLR output jac ks, we recommend that you use them. Refer to the Balanced and Unbalanced Lines in the T ec hnically Speaking section for additional information about why we recommend using balanced lines[...]

  • Page 6

    CONNECTING A PREAMPLIFIER OR A SURROUND CONTROLLER TO THE UNBALANCED INPUT ON YOUR JC 1 3 1 2[...]

  • Page 7

    YOU SHOULD KNOW Correct Speaker Polarity is Important P olarity refer s to the + and - connections. Speaker wires are coded with printing or a ridge on the insulation on one of the leads so you know whic h lead w as connected to the + and - terminals at the other end. This coding will help you keep the + and - polarity consistent for all c hannels.[...]

  • Page 8

    The JC 1 can be turned on and off manually or automatically for your convenience. Using the Front Panel On-Off Button For manual operation, the JC 1 rear panel Auto T urn On switc h must be in its Manual ( middle) position. Connecting an Active Audio Source for Automatic T urn On-Off The JC 1 can be turned on and of f with an audio signal , or by a[...]

  • Page 9

    If you want to automatically turn on the JC 1 with an external DC voltage, select the DC trigger by moving the Auto T urn On switc h on the rear panel left to its 12 V olt T rigger position. What you’ll need: A wire with a 2.5 mm sub-mini plug on eac h end (pro vided) A “control” component with +9Vdc to +1 2 Vdc trigger voltage Before Connect[...]

  • Page 10

    Whenever the JC 1 is turned on either manually or automatically, it generates 12 Vdc at its 12 V T rigger Out jack so it can trigger additional JC 1 ampliers or other components on and off. What Y ou’ll Need: A second wire with a 2.5 mm sub-mini plug on eac h end (not pro vided) A component that can be triggered with an external +9 Vdc to +12 [...]

  • Page 11

    UNDERSTANDING THE INDICATORS AND CONTROLS ON THE JC 1 8 A AC Present Indication When the JC 1 is plugged into a live A C outlet, a soft blue halo glows behind its On-Off but ton and its red “P” Badge glows faintly . These indicate that the JC 1 is plugged into a live A C outlet, even when it is turned off . On and Off Indications for Both Manua[...]

  • Page 12

    CONNECTING THE AC POWER CORD 9 1 2 1 2 JC1 Amplifier Parasound Products. Inc. San Franscisco , C A US A Ground Normal Lift Fuse T15A/250V -115V Ar ea T8A/250V-230V Area Power Consum ption: 1200W AC 115V 60Hz AC 230V 50Hz AC Power Connections W e recommend that you plug your JC 1 into the same A C wall outlet or power strip that powers your other au[...]

  • Page 13

    MAINTAINING YOUR PARASOUND JC 1 1 0 Notes: Y our Parasound JC 1 power amplier requires no periodic maintenance and has no user - serviceable parts inside. T o avoid the risk of electric shoc k, do not remove its top cover . The amplier ’ s exterior can easily be cleaned with a sof t cloth pre-moistened only with a few drops of water or glas[...]

  • Page 14

    TROUBLESHOOTING GUIDE 1 1 JC 1 will not turn of f when audio signal is remov ed PROBABLE CA USE Power cord is disconnected REMED Y Hum and / or buzz through speak ers Ground loop between preamplifier and JC 1 or at the equipment rack Move the Ground Lift switch to its Lift position Install nylon shoulder washers on both sides of the panels of all e[...]

  • Page 15

    SERVICING YOUR JC 1 12 If All Else Fails-Call Us fo Help Call your P arasound dealer or P arasound’ s T ec hnical S ervice Department toll free at 1 -866-770-TECH (8324) between 8am and 4pm P acic T ime. W e can often solve the problem with simple diagnostic tests you can perform your self . If we determine that your JC 1 will need further ins[...]

  • Page 16

    TECHNICALLY SPEAKING 13 Audio T rigger Sensitivity Adjustment The Auto T urn On Audio Sensitivity Control sets the threshold of the audio trigger signal. Y ou can adjust this level from a maximum sensiti vity of 50 mV (fully countercloc kwise) to a minimum sensiti vity of of 250 mV (fully cloc kwise). If you set this control to 50 mV , the JC 1 mig[...]

  • Page 17

    TECHNICALLY SPEAKING continued 14 Eliminating Ground Loops - Hum and Buzz Audible hum and buzzing noises in a system are usually related to issues with the component grounds. Ground (sometimes called common) is a point of reference for voltages in virtually all audio and video components. Ground is supposed to remain at zero volts while the audio s[...]

  • Page 18

    PARASOUND JC 1 DESIGN OVERVIEW 15 Designed by John Curl and CTC Builders P arasound has worked with legendary designer John Curl since 1 989. John has been a legend among audiophiles and electronic engineers since the mid ‘70s. He pioneered measurements to correlate musical accuracy with the materials used in component par ts, worked with world-c[...]

  • Page 19

    PARASOUND JC 1 DESIGN OVERVIEW continued 16 Class A/AB Operation Pure class A operation provides the purest sound. However , an amplier operating entirely in class A operation would be enormous, highly inefcient, and generate far too muc h heat. Class AB combines some of the advantages of Class A with the efciency of Class B operation. It [...]

  • Page 20

    PARASOUND JC 1 SPECIFICATIONS 17 Power Output. 20 Hz - 20 kHz 40 0 w atts continuous, 8 Ω 800 watts continuous, 4 Ω Class A Power Output 25 watts, bias set to High 1 0 watts, bias set to L ow Current Capacity 135 amperes peak Slew Rate > 130 volts per microsecond Frequency Response 2 Hz - 120 kHz, +0/-2 dB Total Harmonic Distortion < 0.15[...]

  • Page 21

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  • Page 22

    Parasound Products, Inc. 950 Battery Street, San Francisco, CA 94111 415-397-7100 / Fax 415-397-0144 www.parasound.com[...]