Power Amplifier User Manual
Contents
1. No output on one or more channels Lower output on one or both channels Poor speaker imaging lack of Bass output Missing or bad input signal connection Incorrect speaker connection Higher trim on one or both channels Loudspeakers connected out of phase Check all input connections Check speaker output connections on rear panel Check trim level and adjust accordingly Check polarity of speaker connections especially important if Multi wiring Multi amping Hum from speakers GUARANTEE Incorrect Grounding Check Mains polarity and grounding on all connected eguipment K2 There are no user serviceable parts inside your K2 Stereo Power Amplifier If a fault should develop refer all servicing to your appointed ROKSAN retailer distributor or ROKSAN approved service agent Your ROKSAN K2 Stereo Power Amplifier is guaranteed against any defect in materials and workmanship for a period of five years from the date of purchase This guarantee only becomes effective if the warranty card is validated by the ROKSAN retailer from whom the eguipment was purchased and returned to ROKSAN within 28 days of purchase This guarantee excludes 1 Damage caused due to accident missuse neglect and incorrect installation adjustment or repair 2 Liability for damage or loss during transit from the retailer or purchaser to ROKSAN or its authorised distributor for the purposes of repair or inspection Car2. Links must be removed NOTE Kandy Integrated Amplifier Mkl 8 MkII do not have pre out sockets for multi amping If the loudspeakers have more drive units you just add more 2 channel amplifiers and connect respectively HF SPEAKER CABLES ae ei 10o000 TRIMMED 157 BON orn R A SIGNAL INTERCONNECT CABLES Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 6 of 11 ENGLISH Trimmed Input Connection Set u Using the K2 Integrated Amplifier and K2 Stereo Power Amplifier Bi amplified Speakers IMPORTANT Speaker Drive Unit Links must be removed HF SPEAKER CABLES ur Laud kino ssvaaa w aava inoaavi onona z ann iann ERTA vanni ao CAUTION FoR CONTINUED PRE 1 ONLY TAPEIN TAPE our PHONO LINE 2 LINE 1 i R 0 K S A N ppl Kopli mera A DOD KANDY INTEGRATED AMPLIFIER 18 uana sorron D ON THE FRONT ASQUEDE od z R A L N CAUTION WARNING RISK OF HAZARDOUS ENERGY See Instruction Manual LOGATEI Ke UNDERSIDE OF THE UNIT MADE IN ENGLAND rBYPASS OB RECOMMENDED LOUDSPEAKER IMPEDANCE 8 Ohms MAXIMUM POWER CONSUMPTION LESS THAN 1200W RATED POWER 120 WATTS CHANNEL INTO 8 Ohms CHASSIS i WARNING NO USER SERVICEABLE PARTS INSIDE SERIAL No h r STRUCTION 0 TDO NOT ATTEMET TO GAN APPROVED wo
3. column of L amp R Trim able Inputs 2 and the STRAIGHT column of L 8 R Straight Inputs 1 Input Selector Switch 5 should be set to Straight or Trimmed according to the inputs that are intended for use All the inputs use Gold plated RCA Phono Connectors and should be connected according to the standard convention Right Channel Red Left Channel Black or White Also in accordance with standard practice the Upper row of Phono Sockets carries the Left Channel and the Lower row carries the Right Channel The Input Sockets are labeled with their legends upside down as well as the normal way up to assist you should you be connecting an input from a position in front of and above the amplifier Straight Input Connections First set the Input Selector Switch 5 to STRAIGHT If you wish to use the amplifier for multi amping with the K2 Integrated or purely as a power amplifier you should connect the pre out of your K2 Integrated pre amplifier or surround sound processor to the corresponding Straight Input The gain of the K2 Stereo Power Amplifier is exactly the same as the power amplifier section of the K2 Integrated Amplifier and therefore is ideal for Multi amping Bi amping Tri amping etc IMPORTANT NOTE For optimum performance it is recommended to use high quality inter connect cables such as ROKSAN HDC 02A high definition analogue Cable Trimmed Input Connections First set the I
4. ROKSAN USER MANUAL ROKSAN AUDIO LIMITED JUBILEE CLOSE TOWNSEND LANE LONDON NW9 8XD ENGLAND UK TEL 44 0 20 8900 6801 FAX 44 0 20 8205 2644 EMAIL info roksan co uk INTRODUCTION K2 Congratulations on your purchase of the ROKSAN K2 Stereo Power Amplifier This Power Amplifier is designed and manufactured to the highest specification and rigorously tested to reward you with many years of listening pleasure Your K2 Stereo Power Amplifier is at the heart of your hi fi system Its correct installation set up and operation will have a profound influence on the sonic performance of the entire hi fi installation Please read the contents of this manual thoroughly It will help you to understand your hi fi equipment better and enhance your listening pleasure This manual is divided into the following sections Safety Instructions Accompanying card Introduction Cautions Installation Setup Operation Troubleshooting Guarantee Specifications Notes UNPACKING Included in the packing of your K2 Stereo Power Amplifier you will find e One mains lead fitted with the correct mains power plug for your country e One information pack and warranty card After removing these items please retain all packing materials Correct packing is necessary for future transportation of your K2 Stereo Power Amplifier MAINTENANCE After disconnecting the K2 Stereo Power Amplifier from the mains supply the cabinet and front panel
5. Stereo Power Amplifier Rear Panel View IMPORTANT N AN A y KANDY STEREO POWER AMPLIFIER vote wans swiron LOCATED ON THE FRONT K2 UNDERSIDE OF THE UNIT E RATED POWER 120 WATTS CHANNEL INTO 8 Ohms 7 uation Manual DED LOUDSPEAKER IMPEDANCE 8 Ohms MADE IN ENGLAND MAXIMUM PDWER CONSUMPTION LESS THAN 1200W CHASSIS GN SERIAL No Straight Input Straight selected on Switch 5 Trimmed Input Trimmed selected on Switch 5 Right Channel Trimmer Left Channel Trimmer Stright or Trimmed Input selector Switch Chassis Ground Terminal Right Speaker Output Left Speaker Output AC Mains Input AC Mains Fuseholder Voltage amp Fuse Label OOONODOBRWND l Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 4 of 11 ENGLISH SETUP K2 CONNECTING MAINS POWER Please refer to the front 8 rear panel view on Page 4 The moulded IEC connector of the supplied mains lead should be plugged into the socket 9 on the rear of the unit first and then plugged into the mains supply The Mains power switch 2 is on the front underside of the Stereo Power Amplifier This switch can be left on if however the amplifier is likely to be unattended for a long period switch it off and unplug the mains lead from the wall Signal Input Connections There are two types of input on the K2 Stereo Power Amplifier the TRIMMED
6. may be cleaned with a lightly dampened soft cloth or chamois leather Avoid using abrasives or solvents EU DIRECTIVES This product is designed to comply with the legal provisions of EU Directives 89 3336 EC and 72 23 EC The standards which have been applied are those which were in force at the time of the introduction of this product This product is compliant to EN 60065 This product must be earthed Please ensure that other equipment connected to it is earthed according to the manufacturer s instructions This product bears the CE mark Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 2 of 11 ENGLISH CAUTIONS K2 AC MAINS SUPPLY Your K2 Stereo Power Amplifier is set to operate from a fixed supply voltage which is marked on a label next to the mains input plug Before connecting the mains lead please check that your mains supply corresponds to this label as below 230V Products siniri a a Voltage Range 220V 240V TISV Products iiare a eae ered ae Voltage Range 110V 120V 100V Products mmmmeneneneea Voltage Range 90V 110V The mains lead supplied with this product has an IEC mains socket which plugs into the IEC connector on the unit s rear panel The other end is normally attached to the appropriate mains plug for your country In the UK this is the standard UK13A plug This plug should ordinarily not be rem
7. 0Hz Warm Up Mode lt 25W Full Power lt 800W 432 x 380 x 90 W x D x H mm 432 x 380 x 105 including feet 14 Kg K2 Serial Number Year Month Name Location Day Please keep a record for future reference Page 10 of 11 Version 1 02 ENGLISH www roksan co u k Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 11 of 11 ENGLISH
8. a cross hole about 5mm from the panel end of the binding post Insert the bared conductor through the hole and tighten the binding post securely making sure that there are no loose strands or bare ends protruding through the post Carefully observe polarity ensuring that the RED speaker terminal is connected to the RED amplifier terminal and the BLACK speaker terminal to the BLACK amplifier terminal When all the channels are connected to their respective speakers the amplifier is ready for use IMPORTANT NOTE For optimum performance it is recommended to use high quality cables such as ROKSAN HDC 02S High Definition Loudspeaker Cable Many speaker cables such as the ROKSAN HDC 02S are directional Please observe this directionality DO NOT use a speaker cable with conductor size less than 16 AWG 1 6mm Diameter The Binding posts accept conductor sizes up to 12 AWG Multi Amping The Loudspeakers Set u If the Loudspeakers utilise more than one drive unit with individual input terminals for example a Tweeter and a Woofer then the loudspeaker performance will greatly benefit from Bi Amping Dedicating one amplifier to the Tweeter and another to the Woofer isolates them from each other hence reducing distortion and increasing reserved power Speakers work far better with most amplifiers when Multi Amped than using one yet more powerful amplifier Bi amplified Speakers IMPORTANT Speaker Drive Unit
9. d as indicated below NOTE To avoid damage to the trim pots always use a good quality flat blade electrical trimmer Fully Anti 1 8 Turn 1 4 Turn 3 8 Turn 1 2 Turn 5 8 Turn Fully clockwise clockwise clockwise clockwise clockwise clockwise clockwise ay QE Trimmed Trimmed Full Trim 20 2 dB 12 2 dB Full Mute Full Gain Trimmed Trimmed 31 6 dB 30 4 dB 28 2dB NOTE These values and positions are approximate and should be used as a guide During the installation and set up you should adjust the trimmer to achieve the desired output level Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 8 of 11 ENGLISH TROUBLESHOOTING K2 If you suspect that your ROKSAN K2 Stereo Power Amplifier is not operating properly you should check all the connections carefully Pay particular attention to speaker phasing and channel connections Phono plugs should be fully inserted a freguent cause of problems is that Phono plug surrounds do not make proper contact Below are some commonly encountered problems with suggestions for possible cure The list is not exhaustive If you have any unresolved problems please consult your appointed ROKSAN dealer or distributor SYMPTOM LIKELY CAUSE SUGGESTED REMEDY No power AC Mains lead not inserted properly Unit not switched on at rear panel Ensure AC Mains lead is fully inserted Switch unit on at rear panel
10. nput Selector Switch 5 to TRIMMED If you wish to use the amplifier for Multi channel A V directly connected to the Kandy DVD 5 1 Dolby Audio output or as a power amplifier in an installation requiring its output level to be trimmed down then the Trimmed Inputs should be used e g You should connect the Kandy DVD audio output to the corresponding Trimmed Input of the Kandy Power Amplifier These Inputs can then be fully trimmed down by using the Trimmers 3 4 on the back panel IMPORTANT NOTE It is always better to use the Straight Inputs when there are no requirements for level adjustment LOUDSPEAKER CONNECTIONS The Right and Left loudspeakers are connected to the amplifier via the rear panel binding posts 7 and 8 respectively There are two basic types of cable e Figure 8 cable has two insulated conductors that lie parallel either side by side or spaced by insulation e Overall sheathed cable has both conductors insulated and enclosed in an overall plastic sheath Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 5 of 11 ENGLISH Carefully remove any overall sheath or split the figure 8 cable to a depth of about 75mm 3 Carefully strip the insulation on each wire to a depth of about 12mm 1 2 exposing the bare core If the conductor is stranded twist the strands together on each conductor Unscrew the binding post There is
11. oved from the lead If you do remove it please dispose of it safely so that it cannot be plugged into a mains socket whilst in a potentially dangerous condition We suggest that you obtain from your dealer a complete replacement lead Should you move to another area where either the mains voltage or the mains plugs are different from those as supplied with your Integrated Amplifier please contact the appointed ROKSAN distributor for assistance Please observe correct mains polarity at all times The Stereo Power Amplifier mains fuse is located on the rear panel next to the IEC mains connector This must only be replaced by the fuse of the type and rating as described on the fuse rating label on the rear panel of the unit This product requires connection to earth ground The earth wire in the UK this is colour coded green yellow of the mains cable supplied with your Integrated Amplifier must be connected to a suitable earthing point established for this purpose by your electricity supply company If you are in any doubt consult a qualified electrician If the equipment is likely to be unattended for some time unplug it from the mains supply GENERAL CAUTIONS FCC WARNING This equipment may generate or use Radio Frequency energy The user may lose the right to operate this equipment if unauthorised modifications are made INTERFERENCE Properly installed this unit should not cause harmful interference to radio communications There is h
12. owever no guarantee that such interference will not occur in a specific installation If interference arises which you can determine by switching the unit off and on you could try to remedy matters by the following e Re orient or re locate the receiving antenna e Increase the distance between the K2 Stereo Power Amplifier and receiver e Connect the unit to a different mains circuit from that of the receiver e Consult your ROKSAN appointed dealer or an experienced Radio TV technician for help and advice LOCATION Your K2 Stereo Power Amplifier should be located in a well ventilated area and kept away from sources of heat dust and humidity and from direct sunlight The Integrated Amplifier may be positioned either as a free standing unit or alongside another audio video product Never place the Stereo Power Amplifier on carpet or any surface likely to hinder normal ventilation Never allow liquids or other objects to fall into the unit This unit contains no user serviceable parts Do Not remove any panels or attempt to service it yourself Unauthorised servicing will void the warranty Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 3 of 11 ENGLISH INSTALLATION K2 ROKSAN K2 Stereo Power Amplifier Front Panel View 1 2 1 Mode Indicator NOTE There is a peel off protective film on the mirror display 2 AC Mains Power Switch ROKSAN K2
13. riage costs to ROKSAN shall be borne by the consignor All claims under this guarantee must be made through an authorised ROKSAN retailer If eguipment returned for repair to ROKSAN is found on inspection to comply with the product specification ROKSAN reserves the right to make a charge for examination and return carriage Unauthorised servicing will void this guarantee Roksan Audio Itd CLASSIFICATION General Use All specifications are liable to change without notice E amp OE KS Na Page 9 of 11 Version 1 02 ENGLISH SPECIFICATIONS Inputs Input Impedance Input Sensitivity 115W Outputs Output Power Power Supply Damping Factor Freguency response Gain Harmonic Distortion Signal to Noise Ratio Power Source Power Consumption Dimension Weight NOTES Kandy Stereo Power Amplifier K2 Purchase Date ROKSAN Retailer Roksan Audio Itd CLASSIFICATION General Use All specifications are liable to change without notice E amp OE K2 Straight RCA L amp R Trimmed RCA L amp R Switchable 23 ko 900mV Speaker L 8 R x1 gt 125 Watts into 80 both channels driven gt 200 Watts into 40 both channels driven 500VA Ultra Low Noise Toroidal Transformer gt 110 8Q 3dB lt 3Hz gt 100kHz Straight or trimmed input 31 6 dB Straight or untrimmed 50 dB Full Mute Fully trimmed lt 0 003 1kHz 8Q 100dBa ref 900mV 100V 120V 50Hz 60Hz 220V 240V 50Hz 6
14. rn M M roi er ar oditur TRIMMED R 0 K A N PROTECTION AGAINST RISK OF STRAIGHT v KANDY STEREO POWER AMPLIFIER wore mas swiron LOCATED ON THE FRONT RSQUEDECHOC SHOOK HAZARD UNDERSIDE OF THE UNIT DENA ES G NE PAS OUVIR ATTENTION CAUTION G PE TUISK UA PELE DE woo Em weet pecouuen DANE Tons LL MAXIMUM POWER CONSUMPTION LESS THAN 1200W RATED POWER 120 WATTS CHANNEL INTO 8 Ohms m TRIMMED STRAIGHT 4 CHASSIS GNO 0 PA SIGNAL INTERCONNECT CABLES CONNECTION NOTES 1 Connect the Integrated Amplifier L 8 R Pre outputs to the L 8 R Trimmed inputs of the 2 channel Power Amp 2 Connect L amp R speakers to the 2 Channel Power Amplifier L 8 R speaker outputs 3 Switch to the TRIMMED input on the back 4 Carefully adjust the L amp R trimmers to achieve the required level Roksan Audio Itd CLASSIFICATION General Use Version 1 02 All specifications are liable to change without notice E amp OE Page 7 of 11 ENGLISH OPERATION K2 Please refer to the front and rear panel views on page 4 SWITCHING ON The Mains power switch 2 is on the front underside of the K2 Stereo Power Amplifier This switch should be left ON for normal operation If unattended for a long period the Mains power should be switched OFF and the lead disconnected from the power supply When switched your K2 Stereo Power Amplifier will go to Sleep Warm up mode and the MODE indicator light 1 on the f
15. ront will glow GREEN The amplifier is now ready for use 1 If there is no signal or the signal level is extremely low the MODE indicator light will stay GREEN and the amplifier will be in warm up mode 2 When there is signal the input sensor will Wake the amplifier up and the MODE indicator light will change to RED 3 After approximately 1 second Allowing the signal to settle down the Output Relays will turn on and the amplifier will be fully operational 4 If input signal stops or the signal level becomes extremely low the MODE indicator light will change to AMBER after approximately 3 minutes indicating NO SIGNAL 5 If there is still no signal after approximately 20 minutes the amplifier will revert to Sleep Warm up mode and the MODE indicator light will glow GREEN 6 As soon as there is a signal the K2 Stereo Power Amplifier will wake up the MODE indicator light will glow RED and after approximately 1 second the outputs will be activated again USING THE TRIMMERS Please refer to the rear panel views on page 4 There are two Trimmers 1 amp 2 accessible from the back panel that can be utilised to reduce the input level to the individual channels and thus reduce the output level In this configuration the input signal to that channel must be connected to its Trimmed Input socket only not the Straight Input and the selector switch must be set to Trimmed When connected as such the gain on that channel can be reduce
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