Parasound JC 2 User's Manual
Contents
1. Preamplifier PARASOUND Polarity Ivet A BB BB di Mute pt jc2 Preamplifier OWNER S GUIDE 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 NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL 1 Read Instructions Read all the safety and operating instructions before operating this product 2 Retain Instructions Retain safety and operating instructions for future reference 3 Heed Warnings Adhere to all warnings on the product and in the operating instructions 4 Follow Instructions Follow all operating and use instructions 5 Cleaning Unplug this product from the wall outlet before cleaning Use a damp cloth for cleaning Clean the outside of the product only 6 Attachments Do not use attachments that are not recommended by the product manufacturer they may be hazardous 7 Water and Moisture Do not use this product near water 8 Accessories Do not place this product on an unstable c2. Rack Mounting Your Parasound JC 2 With its four feet removed the JC 2 s front panel height occupies three rack spaces 5 4 or 133 mm A single standard rack space occupies 1 3 4 vertical space For mounting in a standard 19 equipment rack you must use the Parasound HRA 3 rack mount kit purchased separately The HRA 3 includes four bolts and eight plastic washers with raised shoulders Slide one washer onto each mounting bolt with its raised shoulder pointing toward the panel hole Carefully insert the bolt through the hole and slide the other washer on the 6 bolt with its raised shoulder facing the rear side of the HRA 3 Rack Bracket panel The washers will sandwich the JC 2 panel and the four mounting bolts Ras ao Gn to prevent metal to metal contact between the Model O O O JC 2 chassis the equipment E bas uma qe ARA rack and the other compo e q O o o o o o o o o O D nents mounted in the rack O Note Tighten each bolt just enough to keep the unit secure in the rack to avoid deforming the shoulder washers Eliminating metal to metal contact reduces the likelihood of creating a ground loop that might introduce hum into your system A custom rack mount shelf for the JC 2 is available from Middle Atlantic Products Inc http www middleatlantic com 115v 230v AC Voltage Selector Switch Note The unit may be seriously damaged if t
3. 00 00 00 ee 6 Connecting your JO 2 eee 7 Operating your JCZ ooo 10 Remote Control Functions 0 00 000 00 ce ee 11 Design Overview 12 Frequently Asked Questions 00 00 0000 00 13 If You Require Assistance or Warranty Repair 14 SHOCIICANONS deca OUD AE PURE wR Bid dod eal trata W cle Rene wet 15 UNPACKING YOUR JC 2 AND PLACEMENT GUIDELINES O Unpacking Your JC 2 Carefully remove your JC 2 from its shipping carton and locate all the enclosed accessories Remote control and two AAA batteries AC power cord Four trigger wires two with 2 5 mm sub mini plugs two with a 2 5 mm and a 3 5 mm mini plug While you are unpacking your JC 2 inspect it thoroughly for possible shipping damage and tell your Parasound dealer immediately if you find any If possible save and store both the inner and outer cartons and most especially the foam packing inserts to protect the JC 2 if you have to move it or ship it You may wish to flatten the cardboard cartons to save room in storage after cutting the taped seams on the bottom flaps This would be a good time to make a copy of your sales receipt to store with the JC 2 s original packing Placement Guidelines The JC 2 will be easier to use and will last longer if you follow these simple guidelines e Place the JC 2 on a shelf that will adequately support its weight e Unless you ll control the JC 2 through a remote infrared sens
4. Wall or Ceiling Mounting Mount the product to a wall or ceiling only as recommended 20 Heat The product should be situated away from heat sources such as radiators heat registers stoves and other products including amplifiers that produce heat www parasound com INTRODUCTION Thank You for Choosing Parasound Your new Parasound Halo JC 2 preamplifier represents the pinnacle of analog audio technology The JC 2 was originally conceived by Parasound president Richard Schram as a companion for the famed Halo JC 1 mono power amplifier In the spirit of the JC 1 Parasound commissioned John Curl and CTC builders to design a two channel preamplifier without compromise It uses the highest quality parts and achieves a higher level of sonic and measured performance than any preamplifier we ve made since Parasound was founded in 1981 We re proud to offer you this exceptional audio component knowing that it will bring you many years of enjoyment and dependability We appreciate your taking the time to read these instructions and thank you for selecting Parasound For updates and corrections to this manual we invite you to check our web site www parasound com Enjoy The Parasound Staff Keeping Records for Future Reference Record the serial number located on the back panel or bottom side of your JC 2 in the space below Also note your Parasound Dealer s name and telephone number Your purchase receipt bill of sale is r
5. systems such as Crestron AMX Control4 Niles and Elan When the JC 2 is connected to such a device it can be controlled and its status monitored from keypads or touch screen panels throughout your house The capabilities of such connections and the programming and interfacing needed will depend on the automation system you select consult your Parasound dealer or custom installer for more information regarding interfacing an external control system to your JC 2 The complete RS 232 protocol can be found at www parasound com 00000 0000 Serial Port RS 232 Control AC Power The IEC standard AC cord supplied with your JC 2 is an audiophile grade component Please connect it directly to an AC wall outlet that is always live If possible plug your JC 2 into the same AC outlet that your accompanying audio components particularly your source components and power amplifiers are plugged into If different AC outlets are used the ground potential may be higher or lower between the outlets resulting in audible hum OPERATING YOUR JC 2 Before turning the JC 2 on recheck all your connections and turn down the volume control to avoid any unpleasant blasts that could damage your speakers Turn On Delay The first time you turn on your JC 2 after connecting its AC power it will automatically mute for 45 seconds with its Mute indicator flashing red This time allows the JC 2 to warm up and stabilize its circuits so you
6. tension on any cables that could cause them to pull loose INPUT CONNECTIONS There are a total of six line level input jacks on your JC 2 Input 1 and Input 2 include both Balanced XLR and Unbalanced RCA connections I I I In1 l I Unbalanced RCA Input Jacks pan All of the six unbalanced RCA inputs have the same input sensitivity and impedance These inputs are z i compatible with any typical analog line level source Unbalanced f When using the In 1 or In 2 unbalanced RCA input Switch Pint G 2 3 connections set the input s corresponding Balanced Unbalanced selector switch to Unbalanced Balanced XLR Input Jacks Use these inputs to connect any source components l with balanced outputs A balanced line provides i superior hum and noise cancellation especially for In ong cable runs Many serious listeners also prefer bd l the sonic characteristics of balanced interconnects e l because the lower inherent noise floor contributes O i to a more defined and spacious soundstage When a using the balanced XLR input connections set the Unbalanced input s corresponding Balanced Unbalanced selector Switch Pint G 2 3 switch to Balanced CONNECTING YOUR JC 2 continued OUTPUT CONNECTIONS There are four pairs of output connections on the JC 2 All of them are active simultaneously Record Out Jacks The Record Out jacks connect to the Record Input jacks on your audio recorder The
7. 24 Monday Friday 8am 4pm Pacific time We can suggest other diagnostic tests you can easily perform If we determine that your JC 2 should be returned to Parasound or an Authorized Parasound Warranty Center for inspection and possible servicing we will provide the location of a warranty center near you or shipping instructions for the unit s return to Parasound Before You Return Any Unit to Parasound for Service Before you send your unit to Parasound you will need to obtain a specific Return Authorization RA number and shipping instructions from Parasound s Technical Department The RA number must be clearly marked on the outer carton Use the original factory packing materials and arrange adequate insurance to cover its value You must include a copy of your purchase receipt since this document establishes the validity of this unit s warranty Warranty repairs are only performed by Parasound or Parasound Authorized warranty centers when your purchase receipt is from a Parasound Authorized Dealer or Parasound Authorized Reseller Units Will Be Refused by Parasound Under the Following Conditions 1 Unit was sent without the Parasound assigned RA number marked on the carton Unit was sent in an unsuitable shipping carton likely to have been damaged in transit Unit has inadequate packing unit likely to have been damaged in transit Unit was shipped collect for shipping charges We do not accept collect shipments Unit was shipp
8. OUR JC 2 continued DESIGN OVERVIEW Polarity Normal 8 Invert Buttons The polarity or phase of the Main Outputs is the same as the input unless you press the Invert button to invert the polarity of the Main Outputs 180 relative to the input signal Pressing the Normal button restores normal 0 polarity of the Main Outputs For more information on when to invert polarity please see the Frequently Asked Questions on page 13 of this manual Parasound Tuner Buttons These buttons will control Parasound Halo Tuners such as the T 3 They select FM or AM band and allow you to scroll through its presets Burning in Your JC 2 Like many other great high end preamplifiers your JC 2 should operate for at least 72 hours with music playing any volume level is ok after it is first turned on before it will sound its best This gives various internal components and wiring a chance to form their optimum electron pathways so they can pass complex musical information with greater definition smoothness and transparency Although your JC 2 will sound spectacular when you first turn it on you will come to appreciate it even more as your listening hours accumulate You ll discover additional musical details you may not have known were present Maintaining Your JC 2 Your JC 2 requires no periodic maintenance and has no user serviceable parts inside To avoid risk of electric shock do not remove the top cover To keep it clean use only a so
9. Record Out jacks provide fixed level signals that are unaffected by the master volume control L or R level trim controls mute or polarity invert select Note The Record Out jacks of the JC 2 are not switched as a monitor for simultaneous comparisons of recording to source Record Out r Inverted Out Main Outputs I Fixed Level l I l I I I l I I I l 180 Polarity i Pin1 G 2 3 3 Record Out r Inverted Out Main Outputs Main Output Jacks The Main Output Jacks are the primary outputs that connect to the inputs on your amplifier s There are both balanced and unbalanced Main Out jacks If your amplifier is equipped with balanced inputs we recommend this 4 type of connection The polarity of the Fixed Level Main Outputs is the same as the input but can be inverted 180 by pressing the Invert button on the JC 2 s remote control When polarity is inverted the POLARITY INVERT indicator will illuminate on the front panel For more information on when to use the polarity invert feature please see the Frequently Asked Questions section of this manual Pin1 G 2 3 Note The JC 2 uses a fully differential balanced circuit and its balanced outputs do not require or use phase inverters Inverted Out Jacks The polarity at the Inverted Out jacks is always 180 from the input signal and is not affected by the Invert button on the remote You may use the
10. V XLR Pin Identification 1 Ground Shield 2 Positive 3 Negative Return AC Power Requirement 110 120 V or 220 240 V 50 60 Hz Set AC Voltage switch on rear panel 25 watt standby 30 watts when turned on Dimensions Width 17 Va 437 mm Depth 16 406 mm Height with feet 5 7 150 mm Height without feet 5 Ya 133 mm Weight Net 24 Ibs 11 kg Shipping 36 lbs 16 4 kg Rack Mount Accessory HRA 3 May be purchased separately Specifications and features subject to change or improvement without notice O 2007 Parasound Products Inc Rev 0 91 We invite you to visit www parasound com for the most up to date information on your unit and to find out about other Parasound products Learn why Parasound has been a quality and value favorite of magazine reviewers sound professionals and listeners like you since we were founded in 1981 eries PARASOUND NEWCLASSIC y CUSTOM i HALO PARASOUND G PARASOUND Parasound Products Inc 950 Battery Street San Francisco CA 94111 Customer Service 415 397 7100 Technical Dept 415 675 7272 Fax 415 397 0144 www parasound com rev 0 91 O 2007 Parasound Products Inc
11. art or stand The product may fall causing bodily injury and damage to the product A product and cart combination should be moved with care Quick stops excessive force and uneven surfaces may cause the product and cart to overturn 9 Ventilation Slots and openings in the cabinet are provided for ventilation to ensure reliable operation of the product and to protect it from overheating These openings must not be blocked or covered This product should not be placed in a built in installation such as a bookcase or rack unless proper ventilation is provided 10 Power Sources Operate this product only from the type of power source indicated on the label If you are not sure of the type of power supply to your home consult your dealer or local power company This product is equipped with a three prong grounding plug This plug will only fit into a grounding power outlet If you are unable to insert the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the grounding plug 1 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them 2 Lightning Unplug the unit from the wall outlet for added protection during a lightning storm and when it is left unattended and unused for long periods of time This will prevent damage to the product due to lightning and power line surges 3 O
12. control power supply and control circuits also have dedicated PCBs To prevent the possibility of radiated noise getting into an audio circuit the power supplies and control functions are further isolated from each other by two s inch thick aluminum partitions that are the full height of the chassis and run side to side and front to back The entire signal path is embedded on circuit boards in a continuous ground plane or carried in professional grade Canare shielded wires Even within the audio circuit s power supply section AC power is isolated from regulated power by placing the power transformer high in the chassis on one of the aluminum partitions The power transformer is an R core type which has the advantage of a toroid transformer for minimizing radiated hum but is superior at preventing noise carried on the AC power line from passing into its secondary windings Ground return paths are low resistance with substantial planes and thick wires and sequenced precisely Non audio control circuitry LEDs relay coils and the motor for the master volume control are powered by a separate power supply whose transformer has a separate ground return The resulting extremely low noise levels enable musical nuances to overlay an utterly silent background FREQUENTLY ASKED QUESTIONS Why is there no sound from the speakers Check that AC is live and the P badge and an input LED are illuminated Check that input and output cables are se
13. cure at both ends Make sure your JC 2 is switched to the correct input What could cause the remote to not work Remote s batteries are weak or dead Earth911 org shows battery recycling options Insure that the front panel IR receiver is not obscured or exposed to direct sunlight or to an LCD or a plasma TV screen IR signals might be being received by both the rear panel input and the front panel sensor Ensure that the IR signals are only reaching one of the two I can hear a background hum from the speakers Move audio cables and AC cords away from each other while power is off Try to route audio cables and AC cords perpendicular to each other while power is off Make sure insulating shoulder washers are used if unit is rack mounted Reverse the direction of the other components AC plugs one by one while power is off Ensure that the power amps and the JC 2 are plugged into the same AC outlet The sound is distorted and weak Make sure the gain of the power amp is not set too low Are you trying to use the JC 2 with a turntable It does not have a built in phono preamplifier stage You will need a phono preamp such as the Parasound Zphono Visit www parasound com Make sure the stereo power amp s stereo mono switch is set to stereo Why does the red Mute Indicator flash every time turn my JC 2 on The first time you turn on your JC 2 after its AC power was interrupted or disconnected it will automa
14. don t hear any turn on transients After the first turn on its turn on delay will be only 4 5 seconds Note Your JC 2 will also mute for 45 seconds the first time you turn it on after its AC power was interrupted or disconnected FRONT PANEL CONTROLS Preamplifier PARASOUND On Off Button Push once to turn on Push again to turn off The Mute LED will flash for 4 5 seconds whiles its circuits stabilize After the circuits stabilize the muting will disengage Input Select Button The INPUT button selects the 6 inputs and a blue LED indicates which input is selected You will select the next input each time you press it Input 1 comes after input 6 Volume Control Your JC 2 employs a precision close tracking four gang potentiometer to adjust master volume level Adjust your power amplifier gain controls if it has them so that your JC 2 master volume knob s indicator is between 11 o clock and 1 o clock for your most typical listening level This is its sweet spot where the control s left right channel tracking is closest and its distortion is lowest Note The JC 2 has a maximum gain of 14 dB which is suitable for most power amplifiers and for all Parasound power amplifier models including the JC 1 Left and Right Level Controls Adjusting left and right channel balance is helpful to compensate for speaker placement room acoustics or if your power amplifier s gain isn t identical for both chan
15. e ww wy battery compartment aa w Zv On and Off Buttons These have the same function as the On Off button on the front Polarity panel These separate buttons enable programming unambiguous a Invert hard off and on commands into a system controller or to create wy Q y a macro sequence for a learning type remote control Mute Button Pressing the Mute button once mutes the signal at both Main Out AS jacks and the Inverted Out jacks The red Mute light will flash on UNS the front panel while mute is engaged Press the Mute button a second time to cancel mute Note It does not mute the signal at the Record out jacks E Volume A and Y Buttons NA These buttons control the rotation of the front panel motorized Level control to increase and decrease listening volume levels oN TER Input Buttons WED WEY Press the input button of the source that you wish to hear TD om GR om N ys W YN y Trigger Off amp On Buttons Pressing these On or Off buttons will activate Triggers 3 and 4 semi located on the rear panel The triggers output 12 volts which can EN CoO ED ED be used to turn on power amplifiers or other components that are equipped with a trigger input Triggers 3 and 4 are always off when PARASOUND the JC 2 is off but they can be turned on or off when the JC 2 is 2 A on by using these remote handset buttons ak 4 Na Le NS Py se wife se E OPERATING Y
16. ed via the US Postal Service oa KR OUN Unit was sent to an address other than the address instructed by our Technical Department Note The shipping address is not the same as Parasound s office address Warranty Repair Read your accompanying Parasound Limited Warranty carefully to understand the applicable rights and limitations This section provides instructions for obtaining repairs both for units covered under the Parasound Limited Warranty and for units or situations which are outside the Warranty Unit is not eligible for repair under the terms of the Parasound warranty if 1 Unit was not purchased from a Parasound Authorized Dealer 2 You are not the original owner The Parasound warranty is not transferable 3 Unit s serial number was removed modified or defaced 4 Unit shows evidence of abuse and or misuse 5 Unit was modified in any way 6 A prior repair was attempted by an unauthorized repair station JC 2 SPECIFICATIONS Frequency Response 5 Hz 100 kHz 0 3 dB Distortion THD lt 0 003 at 100 Hz THD lt 0 005 at 20 kHz IM lt 0 003 S N Ratio gt 116 dB input shorted IHF A weighted gt 104 dB input shorted unweighted Crosstalk gt 100 dB at 10 kHz gt 90 dB at 20 kHz Input Impedance Unbalanced 30k Q Balanced 30k Q per leg Output Impedance Unbalanced lt 60 Q Balanced lt 60 Q per leg Input Sensitivity 200 mV for 1 V output Total Gain 14 dB Maximum Output 8
17. equired to determine if your JC 2 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 2 s carton OWNERSHIP REFERENCE INFORMATION Parasound JC 2 Preamplifier Serial Parasound Dealer Dealer Phone Number Date of Purchase Jy You Should Know There is no Parasound warranty for this unit if it was not purchased from an Authorized Parasound Dealer Investigate warranty coverage statements made by an unauthorized dealer very carefully as you will need to depend entirely upon your dealer and NOT upon Parasound Unauthorized dealers lack the capability to make repairs or arrange for repairs of Parasound equipment Authorized Parasound Dealers and detailed warranty information is available at www parasound com or you can call 415 397 7100 between 8 30 am and 4 30 pm Pacific time A missing or altered serial number could indicate that this unit was re sold by an unauthorized dealer or is stolen merchandise If this unit is missing its serial number or the serial number has been altered you should return it to your dealer immediately for a full refund TABLE OF CONTENTS Important Safety Instructions clic 2 Introduction esses a A A A WER Ee UA ee Eee 3 Unpacking and Placement Guidelines 0 0 0 00 5 PACK Mo nti g lt gt o ESE BS BE LEEDS EEE e RE ERM EER 6 115 230v AC Selector Switch
18. ft cloth moistened with a few drops of clear water or Windex Never use any solvents or abrasives The remote control handset batteries should be removed whenever it will be unused for an extended period Remove the battery cover annually to inspect and remove leaking batteries DESIGN OVERVIEW John Curl s symmetrical circuits are well respected and give the listener the best chance to experience the full emotional content of the source In the JC 2 the physical implementation of the circuits closely follows the circuit topology and the layout is as literal as possible commensurate with isolation of disparate or out of phase signals All component parts are oriented for minimum interaction The high current low impedance audio power supply is larger than many amplifiers and carefully integrated with the signal boards The resulting musical output blooms with both absolute musical authority and clarity The chassis and PCB layout of the JC 2 are uncompromised in their pursuit of the highest design goals for a preamplifier The shortest signal path is achieved by placing the master volume control and individual channel level potentiometers and high quality gold plated input select relays right where the input circuitry is located to eliminate the need for long wires and traces Each channel is on a separate PCB The preservation of low level signals is achieved by the separation of critical audio signals from non audio circuits The audio power supply
19. his switch is set incorrectly Prior to plugging your JC 2 into an AC power source check the position of the 115v 230v switch on the JC 2 s rear panel and do not depend on the 115v or 230v markings on the carton This switch is found on the rear panel near the AC mains AC Voltage receptacle The 115V position of this switch is correct for North America most other countries require setting it to 230V Make sure O the 115 230V switch is set for the correct AC line mains voltage before you plug in the JC 2 s power cord URE Ea CONNECTING YOUR JC 2 CAUTION WARNING CAUTION DESIGNED BY Pp To prevent fire or shock hazard do not To prevent electric shock donot remove top cover No ser serviceable CTC Builders AUS save De coc frermave ne recua expose this unit to rain or moisture parts inside Refer servicing to qualified service personnel John Curl Carl Thompson amp Bob Crump Unbalanced amp Balanced Inputs 1 In3 n4 J0000 E Power Consumption 30W Unbalanced Inputs In3 Ina 1 pj Ins In6 pr NE R yy a m1 Ss nm 1 115V 230 60Hz 50Hz al AC 115V 60Hz El AC 230V 50Hz E Always disconnect the AC cord to your JC 2 and power amplifier s before making or changing any input output or trigger wire connections Inserting or removing an input or output cable while the JC 2 or power amplifiers are turned on can result in a blast of sound that can damage your loudspeakers Make sure there is no strain or
20. inverted output jacks to maintain correct absolute polarity if your power amplifier s invert polarity For more information on absolute polarity please see the Frequently Asked Questions section of this manual Inverted Out Jacks and Power Amplifier Bridging You can bridge a conventional two channel power amplifier to mono by connecting one amplifier input channel to the JC 2 s left channel Inverted Out jack and the other amplifier input channel to the JC 2 s right channel Main Out jack Connect a single mono speaker to the amplifier s left and right positive terminals with no wires connected to its negative terminals Note While this won t hurt the JC 2 you can seriously damage the power amplifier if you make any connections to its negative speaker terminals Connecting a Signal Processor to Your JC 2 You can patch a signal processor between the JC 2 and your power amplifier s This would include devices such as an electronic crossover or the equalizer that is supplied with a particular speaker Make sure that the signal processor s input can accept the full output of the JC 2 without overloading You should also adjust the gain controls of your amplifier processor and the JC 2 for the lowest noise level CONNECTING YOUR JC 2 continued OTHER CONNECTIONS 12V Trigger Out There are four 12 volt trigger outputs These can be used to turn on power by Power On Off amplifiers and other equipment that are equipped with auto
21. matic turn on inputs O O Two of the 12 volt trigger output jacks labeled 1 and 2 are live whenever the JC 2 is turned on The jacks labeled 3 and 4 are activated when you press the Trigger On button on the remote control Triggers 3 and 4 are always off when the JC 2 is powered off by Remote Control O O Connect the JC 2 12V output jack to the triggered component s trigger input jack lid ONE using the provided trigger wire with the 2 5 mm sub mini plugs Note Most Parasound Power Amplifiers are equipped with a 2 5mm 12V trigger input jack The trigger voltage source is DC and the trigger plug tip is positive and its sleeve negative The JC 2 combined trigger output maximum current capability is 150mA total External Remote Input Your JC 2 is compatible with most popular infrared repeater systems for remote control operation from another room or when the JC 2 is installed in a cabinet where its remote handset signals cannot reach its front panel remote control sensor The External Remote Input connector is a standard s 3 5 mm mini jack The center conductor plug tip is for and the outer conductor plug sleeve is for Your Authorized Parasound dealer or custom installer can recommend a compatible IR repeater system External Remote RS 232 Serial Port This 9 pin female DB9 connector is a full duplex serial port This permits the JC 2 to communicate in two directions with home automation and control
22. nels The JC 2 does not have a conventional balance control knob because a single part would compromise crosstalk and impair the JC 2 s precise sound stage reproduction Further in its center position a balance control potentiometer s wipers remain in the audio circuit There are no balance control potentiometers which meet Parasound s quality standards for the JC 2 OPERATING YOUR JC 2 continued We use independent high resolution Japanese TKD gain control potentiometers to trim the volume of each channel for a balanced sonic image In most cases you will simply leave the Left and Right knobs fully clockwise where the potentiometer wipers make direct contacts and are out of the circuit Note The Left and Right Level Controls are intended only for very precise adjustment over a 10 dB range and they will not reduce channel output levels to zero when they are turned fully counter clockwise Invert Indicator When this illuminates the polarity of the Main Outputs are being inverted 180 out of phase from the input signal The polarity invert feature can be turned on or off from the remote handset For more information on when to use this feature see the Frequently Asked Questions section of this manual REMOTE CONTROL FUNCTIONS The JC 2 remote control has a range of approximately 20 25 feet 6 7 5 meters Use only AAA alkaline batteries in the handset AS AB and insert them according to the and polarity markings in th
23. or repeater system put it on a shelf where you can aim the remote control handset directly at the JC 2 If you use a remote repeater sensor be sure the remote s signals can t reach the JC 2 s front panel IR sensor otherwise the remote control will not function properly If you re installing the JC 2 yourself use input and output cables that are long enough to leave at least two feet of slack that will enable you to pull the JC 2 out of a cabinet to check or to change connections without inadvertently disconnecting cables If you re putting the JC 2 in a cabinet it needs a space that s at least 22 inches wide so you ll be able to turn it around for access to its rear panel connections Ventilation Requirements Because the JC 2 is a high current class A design it is always slightly warm to the touch even when in standby To reduce the chance of your JC 2 overheating please follow these guidelines e Install your JC 2 away from heat sources such as heating ducts radiators or heat producing components Always position the JC 2 horizontally We recommend that you do not place the JC 2 above a power amplifier Do not install the JC 2 in an unventilated equipment cabinet or compartment Pockets of stagnant hot air can build up even in cabinets with open front and back sides A ventilation fan such as the Parasound Zbreeze is highly recommended to prevent hot spots in confined spaces O UNPACKING YOUR JC 2 AND PLACEMENT GUIDELINES
24. tically mute for 45 seconds with its Mute indicator flashing red This time allows the JC 2 to warm up and stabilize its circuits so you don t hear any turn on transients After the first turn on its turn on delay will be only 4 5 seconds When should use the Polarity Invert feature Correct absolute polarity insures that loudspeaker cone or diaphragm movement in negative pressure and out positive pressure is consistent with the original recording While correct absolute polarity may not be noticeable in many recordings you will detect a marked audible improvement in very well recorded performances Contact the manufacturer of your power amplifier s and source components if you are uncertain if they maintain correct polarity If your amplifiers or other equipment do invert the polarity you will want to use the Inverted Outputs Please note that Parasound amplifiers do not invert the polarity You may also find that some recordings sound better when inverting the polarity In this case you can select the polarity that sounds best using the remote handset Should use Balanced or Unbalanced connections Recording and broadcast studios use balanced connections almost exclusively because of balanced lines inherent ability to reject noise and hum even when components are far apart and connected by long cables Certain high quality preamplifiers amplifiers and surround controllers built for residential use also include balanced connections
25. verloading Do not overload wall outlets or extension cords This can result in a fire or electric shock 4 Inserting Objects into Unit Never push objects of any kind into this product through any openings they may touch dangerous voltage points or short out parts that could result in fire or electric shock 5 Servicing Do not attempt to repair or service this product yourself Opening or removing covers may expose you to dangerous voltage and other hazards Refer all servicing to qualified service personnel 6 Damage Requiring Service Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions a If the power supply cord or plug is damaged b If liquid has been spilled into the product e If the product has been exposed to rain or water d If the product does not operate normally by following the operating instructions e If the product has been dropped or damaged in any way f If the product exhibits a distinct change in performance 17 Replacement Parts When replacement parts are required be sure the service technician has used replacement parts specified by the manufacturer Unauthorized substitutions may result in fire electric shock and other hazards 18 Safety Check Upon completion of any service or repairs to this product ask the service technician to perform safety checks to determine that the product is in proper operating condition 19
26. with XLR jacks for the same reasons The JC 2 s balanced outputs enable you to take full advantage of the inherent noise rejection capability and superior sound quality of Parasound Halo power amplifiers especially when the power amplifiers are located near the speakers far from the JC 2 The balanced inputs on the FREQUENTLY ASKED QUESTIONS continued WARRANTY JC 2 also insure the best possible analog connection to source components which are equipped with balanced outputs We generally recommend balanced connections if your power amplifiers or source equipment are located more than 10 feet from your JC 2 Many serious listeners prefer the sonic characteristics of balanced connections because their lower inherent noise floor contributes to a more defined and spacious soundstage When using the balanced XLR input connections set the input s corresponding Balanced Unbalanced selector switch to the Balanced position Where should I set the Left and Right gain controls In most cases you will simply leave the Left and Right knobs fully clockwise where they are completely out of the audio circuit If you do need to compensate for speaker placement or room acoustics lower one of the controls until the volume level of the left and right speakers are equal 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 toll free at 1 866 770 83
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