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Summary of Contents for Parasound HALO JC 1+
- Page 1 JC 1+ Mono Power Amplifier OWNER’S GUIDE...
- Page 2 Important Safety Instructions The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of “dangerous voltage” inside the product that may constitute a risk of electric shock. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the product.
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Page 3: Table Of Contents
Table of Contents Introduction ..........Placement &... -
Page 4: Introduction
Parasound dealer’s name and telephone number. Your purchase receipt/bill of sale is required to determine if your JC 1+ is eligible for Parasound warranty service. We recommend that you make an extra copy of your original purchase receipt/bill of sale and store it inside the JC 1+’s carton. -
Page 5: Placement & Ventilation Guidelines
While you are unpacking your JC 1+, inspect it thoroughly for possible shipping damage and tell your Parasound dealer immediately if you find any evidence of shipping damage. This would be a good time to make a copy of your sales receipt to store with the JC 1+’s original packing. -
Page 8: Rack Mounting
Eliminating metal-to-metal contact reduces the likelihood of creating a ground loop that might introduce hum into your system. Please call your Parasound dealer or Parasound Technical Service if you need additional advice about rack mounting the JC 1+. -
Page 9: Bias Level Switch
Rear Panel Controls & Audio Connections Always disconnect the AC cord to your JC 1+ before making or changing any input, output or trigger wire connections. Inserting or removing an input or output cable while the JC 1+ is turned on can result in a blast of sound that can damage your loudspeakers. -
Page 10: Audio Input & Output Connections
Audio Input & Output Connections Balanced XLR Input Jacks In most systems balanced XLR connections will give you the best quality sound because of their ability to reject noise. Refer to the Balanced and Unbalanced Lines in the Technically Speaking section for additional information and why we recommend using balanced lines. -
Page 11: Speaker Connections
Speaker Connections Speaker Terminals The JC1 + has two speaker outputs labeled Speaker Output 1 and Speaker Output 2. The second speaker output is used for a bi-wiring setup (see page 12). The speaker terminals accept wires terminated with banana plugs, spade connectors up to 16mm wide or bare wire up to 8 AWG. Bare Speaker Wire Ends If you plan to connect your speaker cables with bare wire ends, use a wire stripper to remove just enough insulation to expose about a 1 2"... -
Page 12: Bi-Wiring & Bi-Amping
Bi-Wiring and Bi-Amping Bi-wiring and Bi-amping can only be used with speakers that have separate input terminals for HF (high frequency) and LF (low frequency). The straps that connect the speaker’s LF and HF inputs will need to be removed. Some KEF speakers use a rotary switch instead of metal straps to disconnect the HF and LF sections internally. -
Page 13: Turn On Options
Turn On Options Switch The setting of the rear panel three position Turn On Options switch determines how the JC 1+ turns on and off. Setting this switch to Audio or 12 V disables the JC 1+’s front panel On-Off button. There are three turn on options: Manual: When the Turn On Options switch is set to Manual the JC 1+... -
Page 14: Front Panel Operation
3.5 mm and 2.5 mm jacks Some other Parasound power amplifiers and preamplifiers might use a 2.5 mm “sub-mini” (mono) trigger jack. To use the JC 1+ trigger with products that use a 2.5mm jack you will need a 3.5 mm to 2.5 mm mono adapter... -
Page 15: Technically Speaking
1. Your Cable TV or Satellite receiver box might require a Cable TV Ground Isolator. 2. Use balanced input cables with your Parasound JC 1+. (See Balanced & Unbalanced Lines in this section). 3. When rack mounting, always use the insulated “shoulder” washers on both the front and rear sides of the metal rack mount before bolting it to the equipment rack rails. -
Page 16: Design Overview
As our featured amplifier designer since 1990, he has also created many products that have earned Parasound worldwide acclaim and favor, including the Parasound Halo JC 1, JC 2/JC 2 BP, JC 3, JC 3+, JC 3 Jr and JC 5. John is particularly proud of what he and Parasound have accomplished together: “The circuits I design for Parasound are extremely sophisticated and are typical of products that are far more expensive. - Page 17 The JC 1+ Output Stage The JC 1+ output stage includes six ultra-premium quality 33,000uF Nichicon “Gold Tune” electrolytic filter capacitors., These rare parts are chosen for their low Equivalent Series Resistance (ESR), dielectric absorption and resistance to high temperature. In addition, these filter capacitors are bypassed with smaller polypropylene capacitors to reduce AC ripple in the DC supply and to further eliminate noise and interference that is generated in AC power lines, from computers and other appliances in the home.
- Page 18 Class A-A/B Operation Pure class A operation provides the purest sound. However, an amplifier with the output power of the JC 1+ and operating entirely in class A would be enormous, highly inefficient, and generate far too much heat. Class A/B combines the primary advantage of Class A with the higher efficiency of Class B. This reduces the heat generated in pure class A operation as well as the higher-order odd harmonic distortions created in class B.
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Page 19: Problems & Remedies
Problems and Remedies Unit will not turn on • Check the setting of the Turn On Options switch. (The front panel On-Off button will be disabled if this switch is set to Audio or 12 V) • If using the Audio Turn On mode, try increasing the sensitivity of the audio trigger by turning the audio threshold knob to the “Quieter”... -
Page 20: If You Require Assistance Or Warranty Repair
Are You Having Difficulty? Repair or Service Call your Parasound dealer first. If the dealer can’t help you with your problem we encourage you to call Parasound’s Technical Service Department at 415-397-7100, Monday - Friday, 8am - 4pm Pacific Time. We can suggest other diagnostic tests you can easily perform. -
Page 21: Chassis Illustration & Dimensions
Chassis Illustration and Dimensions... -
Page 22: Specifications
>122 dB, IHF A-weighted, bias set to Low >120 dB, IHF A-weighted, bias set to High >113 dB, Unweighted, bias set to Low >111 dB, Unweighted, bias set to High Specifications and features subject to change or improvement without notice. Copyright Parasound Product Inc., 2019 Rev. 1.0... - Page 24 Parasound Products, Inc. 2250 McKinnon Ave, San Francisco, CA 94124 415-397-7100 www.parasound.com...
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