Class A MOSFET Power Amplifier
Contents
1. Typically 0 05 Note 1 Ile 110 dB below max power Frequency Hesponee 1Hz 250kHz 0 3dB Input impedance 0 ee eeeeettteteeeeeaees 53 3 kQ Output Impecdance eee 0 016 Q Damping Factor ceri iaren Terken gt 500 Input sensitivity RCA Inpute 0 7 V rms for max power Balance input sensitvfiv 0 35 V rms for max power Ee E T 30 time the input signal or 29dB Channel separation gt 100dB Slew raie eee esee errerresreesesns Note 2 Class of operaiion eens A Power consumption at die 200 W Power Gupphy 970VA Custom made Toroidal Transformers WIDN en GegiekedE en edd REENEN 28kg 65 Ibs with packaging Dimensions Wxistk cece eerie es 45cm x 20cm x 40cm 17 71 x7 87 x15 75 Note 1 According to IHF A202 standard for the purpose of this standard F1 shall equal 60Hz and F2 shall equal 7000Hz the low frequency sine wave having an amplitude 4 times greater than that of the high frequency sine wave The measurements of Linar Amplifiers are in respect of this standard but with any frequency combination in any ratio Note 2 The amplifier has no global feedback making the slew rate irrelevant 10 Linar Audio Class A Stereo MOSFET Power Amplifier Service and Warranty Linar Audio Model Class A Amplifier is covered for a period of three years against manufacturing defects This warranty includes parts labour and return shipping to the original and subsequent owners In the unlikely event you experienc2. Linar Audio Class A High Performance Audiophile Stereo MOSFET Power Amplifier Owner s Manual Linar Audio Class A Stereo MOSFET Power Amplifier Important Safety Instructions NEO Ol Be GOIN re 11 12 13 14 Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with a dry cloth Do not block ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or another apparatus that produces heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong is provided for safety If the provided plug does not fit into the outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments and accessories specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury Unplug this apparatus during lightnin
3. The Linar 2 Class A Amplifier has an IEC type AC power connector Insert the supplied AC power cord into connector prior to plugging the cord into the AC wall receptacle AC Main Fuse The Linar 2 Class A Amplifier has an AC main fuse accessible on the rear panel If you suspect that your fuse has blown disconnect your amplifier from AC mains and the speakers and replace fuse by the following type Main Voltage 120VAC Fuse type AG3 slow blow Rating 7A 250VAC Main Voltage 230VAC Fuse type AG3 slow blow Rating 4A 250VAC Bridged Mono Operation In Bridged mode two channels are used to amplify a single channel therefore you require two amplifiers for stereo The Linar Class A Amplifiers can be switched for bridged operation without the use of external or internal switches or jumper Linar Audio Class A Stereo MOSFET Power Amplifier Refer to figure 2 for set up To use this mode you will need a Y adapter so that you can feed the same signal one of the preamplifier s two channel into two jacks the right jack and the left jack The supplied dummy load plug should be inserted into the unused jacks The speaker is then connected between the two red output terminals Nothing must be connected to the black terminals If you wish to maintain correct absolute polarity the red speaker cable should be connected to the right red terminal Note that using two amplifiers in this way you can obtain about four times the nor
4. ER wet the inside of this product with any liquid NEVER pour or spill liquids directly onto this unit NEVER block air flow through ventilation slots or heatsinks NEVER bypass any fuse NEVER replace any fuse with a value or type other than that specified NEVER attempt to repair this product If a problem occurs contact your Linar Audio dealer NEVER remove the top cover Internal components can store electricity and could result in serious electrical shock or injury There are no user serviceable parts NEVER expose this product to extremely high or low temperatures NEVER operate this product in an explosive atmosphere ALWAYS unplug sensitive electronic equipment during lightning storms Linar Audio Class A Stereo MOSFET Power Amplifier Contents Important Safety Instructions c cccceceeeeeete eects eeeeeeeeeeeeeaeeesaaeseeeeeseeeeesaeeneneeee 2 IMTROQUGTION sestine eekan e EA E E covebtund sched revel EEE ARARSA OERA 5 WIMPACKING WEE 5 CONNECTIONS sianie a a a deal a ell 6 Front Panoksena fbi ite a E AA 9 erele lee 10 Service and Warramty nenn 11 Linar Audio Class A Stereo MOSFET Power Amplifier Introduction Thank you for choosing the Linar Audio Class A Stereo Amplifier Linar Audio Preamplifiers and Power Amplifiers are the fruit of extensive research and development in the audio field Linar Audio Amplifiers are designed to provide the world class performance at reasonable prices The Linar Class A A
5. e Serial number Linar Audio Class A Stereo MOSFET Power Amplifier Connections All connections are made on the rear panel of your amplifier Familiarize yourself with the layout of the rear panel prior to placing your amplifier on a shelf or in a cabinet Ideally you should have easy and open access to the rear panel to make connections easier and to reduce any crimping or pressure on your cables Connections should only be made with all system components turned off The performance of your system can be significantly improved by using high quality interconnect and speaker cables O Q D H BRIDGED OPERATION USE lt gt RIGHT AND LEFT lt gt INPUT BY Y ADAPTER USE lt gt RIGHT AS OUTPUT lt gt AS LEFT OUTPUT SERIAL NUMBER VOLTAGE MODEL ASSEMBLED IN CANADA BY LIN AIR 1 GND 2 lt gt 3 lt gt BALANCED XLR BALANCED XLR CAUTION gt o RISK OF ELECTRICAL SHOCK DO NOT OPEN RISQUE DE CHOC ELECTRIQUE RIGHT INPUT LEFT INPUT NE PAS OUVRIR LE COUVERCLE dE Figure 1 Linar Audio Class A Amplifier Rear Panel Rear Panel Connections 1and2 RCA Jacks Your Linar Class A Amplifier has 2 sets of single ended inputs Each single ended input is composed of a pair of RCA jacks labelled and This arrangement allows bridging of the amplifier as discussed in a following section Single ended operation One RCA jack is used per side insert the interconnect cab
6. e technical problems with your Linar Amplifier please contact your dealer for troubleshooting tips If no solution can be found please contact Linar Audio using the contact information provided below If there is no authorized service technician in your area a Return Authorization may be given to you Only after obtaining a Return Authorization should you send your Amplifier to the manufacturer Linar Audio will either repair or replace your amplifier at their discretion This warranty will be considered void if any defect failure malfunction or other damage is deemed to have been caused by mistreatment of the amplifier Mistreatment includes but is not limited to abuse tampering servicing of the amplifier by unauthorized technicians and failure to conform to operating instructions listed in this manual There are no user serviceable parts in the Linar Audio Class A Amplifier Servicing should only be performed by factory authorized technicians or by Linar Audio Contact Information Linar Audio 2009 Inc 50 Willard Street Ottawa ON K1S 1T8 Canada Tel 613 261 8466 Email service linaraudio com www linaraudio com C0000060 01 Nov 2009 11
7. g storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as when the power cord or plug has been damaged liquid has been spilled or objects have fallen into the apparatus or the apparatus has been exposed to rain or moisture does not operate normally or has been dropped No naked flame sources such as candles should be placed on the apparatus WARNING TO REDUCE THE RI SK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE CAUTION RISK OF ELECTRICAL SHOCK DO NOT OPEN RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR LE COUVERCLE Linar Audio Class A Stereo MOSFET Power Amplifier Please read completely and observe all instructions and precautions in this owner manual before operating your Linar Audio Amplifier Retain this owner s manual for future reference ALWAYS disconnect the AC main power cord mains before connecting or disconnecting any cables ALWAYS use three connector AC main power cord including a protective grounding protection NEVER use ground lifting and ground plug must be left intact Failure to comply will void the warranty and could pose a serious risk to your health and safety ALWAYS provide a minimum a 10cm 4inches of clearance above the amplifier to allow for heat dissipation NEVER use flammable or combustible chemicals for cleaning audio components NEV
8. le to the RCA jacks Dummy load plugs are supplied and must be placed in the unused RCA jacks Linar Audio Class A Stereo MOSFET Power Amplifier 3 and 4 5 and 6 Ensure you properly connect the left and right channel inputs to your pre amplifier output XLR Balance Input These are labelled BALANCED XLR AND INPUT Ensure you properly connect the left and right channel inputs to your Pre amplifier output Balanced operation Use the XLR inputs connectors before be sure to remove the dummy load on the RCA jack Pin No 1 Ground Pin No 2 input Inversing input Pin No 3 input non inversing input Speaker Connections Your Linar Class A Amplifier is supplied with 2 separate speaker connections There are Left and Right Output Speaker connections Ensure you connect the correct speaker to the correct output for proper system performance Follow each speaker wire from the amplifier to the appropriate speaker to make certain you have connected them properly The outputs are coloured red and the outputs are coloured black Ensure all outputs from the amplifier match the inputs of your speakers so you will not encounter phase problems The speaker outputs will accept most common wire connectors including banana plugs spades and bare wire Under no circumstances should your speaker cables be allowed to short circuit the amplifier by contacting the and outputs simultaneously AC Line cord receptacle
9. mal power See the technical specification for details Note that if you use a Linar Model 2 Preamplifier you do not need a Y adapter because you have two outputs per side SPEAKER s QO RIGHT OUTPUT BRIDGED OPERATION USE lt gt RIGHT AND LEFT lt gt INPUT BY Y ADAPTER USE lt gt RIGHT AS OUTPUT lt gt AS LEFT OUTPUT CAUTION RISK OF ELECTRICAL SHOCK DO NOT OPEN RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR LE COUVERCLE SERIAL NUMBER VOLTAGE MODEL ASSEMBLED IN CANADA BY LINAIR I Figure 2 Connection for bridge mono operation Linar Audio Class A Stereo MOSFET Power Amplifier Front Panel Stereo Power Amplifier Figure 3 Linar Class A Amplifier Front Panel Front Panel Controls 1 On Off Power Always press the Power button to turn on or off of the amplifier There is a soft start circuitry that prevents large in rush current during power on You will hear a click from relays when you turn on the Linar Class A Amplifier 2 On Off LED Indicator A blue LED will illuminate when the amplifier is powered Linar Audio Class A Stereo MOSFET Power Amplifier Specifications Output power at 8 ohms 50 watts ch Output power at 4 ohms 100 waits ch Output power at 2 ohms 200 waits ch Total Harmonic Drstorton 20 20kHz worst case 0 4 typically 0 05 Total Intermodulation Distortion
10. mplifier is designed with J FET transistors in the input stage and the latest generation of MOSFET transistors in the output stage without negative feedback making the amplifier extremely stable under capacitive load The circuitry is fully complementary from input to output Aesthetically stunning and sonically spectacular the Linar Class A Amplifier is a perfect match for your high end 2 channel sources including SACD As with many high end audio products your Linar Amplifier will require a significant break in period This process can take up to 200 hours of use Familiarize yourself with the material contained within this manual prior to using If you have any uncertainties contact your Linar Audio dealer Given proper use and care your Linar Audio Amplifier should provide you with many years of exceptional music reproduction and listening pleasure Unpacking Unpack your Linar Class A Amplifier carefully as it is quite heavy Keep all packaging to ensure safe transport in the future Accessories included with your amplifier are v AC Power Cord v This Owners Manual After you have completed unpacking perform a thorough inspection of the amplifier and report any damage to your dealer immediately It is recommended to allow the unit to acclimatize to the temperature and humidity conditions in your home prior to operation Please write the serial number of your Linar Audio Model Class A Stereo Amplifier here for future referenc
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