JC 3 Jr.
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. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER.
Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Placement and Ventilation Guidelines . AC Voltage Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Audio Input Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cartridge Impedance Selection . Gain Control 4 7 . . . . . . . . . . . . . . .
INTRODUCTION Thank You for Choosing Parasound Your new Parasound Halo JC 3 Jr. Phono Preamplifier is the pinnacle of analog audio technology and value engineering. Its “ DNA” and circuit topologies are inspired by our acclaimed JC 3 and JC 3+. The JC 3 Jr. advances legendary designer John Curl’s reputation for designing legendary phono preamplifiers dating back to the 1970s.
Unpacking Your JC 3 Jr. & Placement Guidelines Unpacking Your JC 3 Jr. Carefully remove your JC 3 Jr. from its shipping carton and locate all the enclosed accessories: • AC power cord • 12 V auto turn on trigger wire with a mono 3.5 mm (1/8”) mini plug at each end While you are unpacking your JC 3 Jr. inspect it thoroughly for possible shipping damage and tell your Parasound dealer immediately if you find any.
AC Voltage Selection 115 V / 230 V AC Voltage Selector Switch This switch is found on the underside of the chassis. Make sure the 115 V/230 V switch is set for the correct AC line (mains) voltage before you plug in the JC 3 Jr.’s AC power cord. Note: The JC 3 Jr. could be seriously damaged if the AC Voltage Selector switch is in the wrong position for your voltage! Prior to plugging your JC 3 Jr. into an AC power source, check the position of the 115v/230v switch on the JC 3 Jr.
Connecting & Adjusting your JC 3 Jr. Always disconnect the AC cords to your JC 3 Jr. and integrated amplifiers or power amplifier before making or changing the input, output or trigger wire connections. Inserting or removing an audio input or output interconnect while the JC 3 Jr., integrated or power amplifier is turned on can result in a blast of sound that can damage your loudspeakers. Make sure there is no strain or tension on any cables that could cause them to pull loose while these are turned on.
JC 3 Jr. Input Settings Cartridge Impedance Select Switch Select the setting that matches your turntable’s cartridge type. If you are unsure which setting is best for your equipment you might want to check it on the cartridge manufacturer’s website. You can also experiment with another setting which sounds the best in your system. The two position Impedance Select switch selects MC or MM cartridges. Select 47k Ω input for all MM or certain MI (moving iron) cartridges.
Audio Output Connections The JC 3 Jr. Output jacks connect to the line level input jacks on your line level preamplifier or integrated amplifier. Each channel has one balanced XLR jack and one unbalanced RCA output jack. If your line stage preamplifier or integrated amp is equipped with balanced XLR inputs we recommend using the JC 3 Jr. Balanced XLR output jacks for the maximum rejection of external noise sources. The balanced and unbalanced jacks are active simultaneously.
Front Panel Controls On-Off Button Push once to turn on the JC 3 Jr. The audio output is delayed for a few seconds as its circuits stabilize and the DC servos settle down. When the JC 3 Jr. is turned on the faint blue glow around the On-Off button will become brighter. Push again to turn off the JC 3 Jr. Note: The On-Off button is disabled when the Turn On Options switch (on the rear panel) is set to 12 V. Mono Button Press the Mono button one time to parallel the left and right stereo channels to mono.
Frequently Asked Questions Why won’t the JC 3 Jr. turn on when I press the On-Off button? - Check the setting of the Turn On Options switch. It must be set to Manual for the front panel On-Off button to function. Why won’t the JC 3 Jr. turn on with an external DC trigger? - Check the setting of the Turn On Options switch. It must be set to 12 V for the 12V trigger to function. Try reversing the polarity of your 12V trigger source. - Both trigger wire plugs must be mono (as supplied with the JC 3 Jr.
Do You Need Support? Warranty Repair 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. If we determine that your JC 3 Jr.
Specifications Frequency Response: 20-20Khz, +/- 0.2dB XLR Pin Identification 1 = Ground (Shield) 2 = Positive 3 = Negative (Return) Total Harmonic Distortion < 0.
Parasound Products, Inc. 2250 McKinnon Ave, San Francisco, CA 94124 415-397-7100 / Fax 415-397-0144 www.parasound.
