Linn 2250 Stereo Amplifier User Manual
Contents
1. for any errors or inaccuracies that may appear in this manual LINN 2250 POWER AMPLIFIER OWNER S MANUAL ysi 6ug English LINN Introduction Linn 2250 The Linn 2250 is a high power two channel amplifier designed for use in multi amplifier audio and video systems It exemplifies Linn s unremitting commitment to exploiting the latest technology in order to produce ever better sounding products The unit s features include Linn s switch mode power supply see below automatic signal sensing bi wireable speaker outputs and the option to add a stereo Aktiv card for improved audio performance Switch mode power supply The power supply in most amplifiers contains a large and heavy transformer a rectifier and reservoir capacitors These components convert the voltage of the mains supply to the low voltage required by electronic circuits and supply this lower voltage to the amplifier circuitry at a constant level regardless of the demands of the amplifier Such power supplies use electricity inefficiently and cause mains power distortion which can lead to electrical and acoustic noise In a switch mode power supply the incoming mains voltage is chopped up by very fast semiconductor switches and is then passed through a small transformer and other components which convert the voltage to the value needed by the amplifier circuitry By controlling the timing of the semiconductor switches the voltage supplied to the am2. or similar surface that may block the ventilation openings or placed in a built in installation such as a bookcase or cabinet that may impede the flow of air through the ventilation openings Heat Site the appliance away from heat sources such as radiators heaters stoves or other appliances including amplifiers that produce heat Power sources Connect the appliance to a power supply only of the type described in the operating instructions or marked on the appliance Grounding or polarisation Do not defeat the safety purpose of the polarised or grounding type plug A polarised 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 your safety When the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Power cord protection Route power cords so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at plugs power sockets and at the point where they exit from the appliance Protective attachment plug As a safety feature the product is equipped with an attachment plug containing overload protection See the instruction manual about resetting or replacing the plug Should the plug need replacing ensure that a replacement is used which has the same overload protection as the original Cleaning The product
3. should be cleaned only as recommended by the manufacturer Power lines An outdoor antenna should be located away from power lines Outdoor antenna grounding If an outdoor antenna is connected to the tuner receiver ensure that the antenna system is grounded to provide some protection against voltage surges and static build up In the USA see article 810 of the National Electrical Code ANSI NFPA 70 concerning installation requirements Lightning storms Unplug this apparatus during lightning storms or when unused for long periods of time Objects and liquid entry Take care not to let objects or liquids fall into the product Damage requiring service The product should be serviced by qualified personnel if a The power cord or plug has been damaged b Objects or liquid have fallen into the product c The product has been exposed to rain d The product does not appear to operate normally or exhibits a marked change in operation e The product has been dropped or the enclosure damaged Servicing Don t attempt to service the product beyond that described in the operating instructions All other servicing should be referred to qualified service personnel 2250 POWER AMPLIFIER OWNER S MANUAL usiI6uq English LINN UK USERS PLEASE READ THIS IMPORTANT SAFETY INFORMATION Replacing the fuse in the mains plug This appliance is fitted with a non rewireable 13 Amp mains plug The plug contains a 5 Amp fuse If the fuse has
4. will revert to standby mode ten minutes after the input signal ceases To operate the Linn 2250 power amplifier select a source on your preamp wait a couple of seconds for the unit to power up then sit back and enjoy it Guarantee and Service This product is guaranteed under the conditions which apply in the country of purchase and your statutory rights are not limited In addition to any statutory rights you may have Linn undertake to replace any parts which have failed due to faulty manufacture To help us please ask your Linn retailer about the Linn warranty scheme in operation in your country In parts of Europe the United States of America and some other markets extended warranty may be available to customers who register their purchase with Linn A warranty registration card is included with the product and should be stamped by your retailer and returned to Linn as soon as possible Warning Unauthorised servicing or dismantling of the product invalidates the manufacturer s warranty There are no user serviceable parts inside the product and all enquiries relating to product servicing should be referred to authorised retailers only Technical support and information For technical support product queries and information please contact either your local retailer or one of the Linn offices opposite Full details of your local retailer distributor can be found on the Linn web site www linn co uk Important O Please keep a
5. 2 LINN English Fran ais Deulsch Espa ol Italiano Nederlands Portugu s 2250 POWER AMPLIFIER OWNER S MANUAL Important Safety Information Explanation of symbols used in this manual and on the product This symbol is intended to alert the user to the presence of uninsulated dangerous voltages within the enclosure of sufficient magnitude to cause electric shock This symbol is intended to alert the user to the presence of important maintenance and servicing information in the instruction and service manuals CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL WARNING SHOCK HAZARD DO NOT OPEN AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY WITH THE CORRECT TYPE OF FUSE ATTENTION POUR UNE PROTECTION DURABLE CONTRE LES RISQUES D INCENDIE REMPLACER UNIQUEMENT CE FUSIBLE PAR UN AUTRE DU M ME TYPE DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE ATTENTION DEBRANCHER AVANT DE REMPLACER LE FUSIBLE WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE MAINS PLUGS This appliance is supplied with a non rewireable mains plug for the intended country Replacement mains leads can be obtained from your Linn retailer Should you need to change the plug please dispose of it carefully A plug with ba
6. EDs on the back panel will indicate which inputs are selected The push button does not directly pass the audio signal but instead sends a control signal to distortionless solid state switches Both unbalanced and balanced signals are passed through the unbalanced and balanced line out sockets to enable daisy chaining of amplifiers Back Panel VOLTAGE SELECTOR CAUTION DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE REPLACE FUSE WITH T6 3AL Channel 1 J Audio unbalanced input and output Balanced input and output Speaker outputs Power switch Voltage selector 8 Mains input Channel 2 Speaker outputs Aktiv card controls if card is fitted Balanced input and output Unbalanced balanced push button Audio unbalanced input and output EB indicate selected input The Linn 2250 power amplifier should be powered down then disconnected A from the mains supply before connecting or disconnecting any of the plugs on the back panel If this is not done you may generate surges which could damage the unit or other components in your AV system 2250 POWER AMPLIFIER OWNER S MANUAL usiI6uq English LINN Signal Sensing The signal sensor in the Linn 2250 power amplifier waits about one second before powering up the amplifier to be certain the input signal is real not just noise The detection threshold is a good compromise between sensitivity to l
7. blown it can be replaced as follows a Pull out the red fuse cover carrier b Remove and dispose of the blown fuse c Fit anew 5 Amp BS1362 approved fuse into the carrier and push the carrier back into the plug Always ensure the fuse cover is fitted If the fuse cover is missing do not use the plug Contact your Linn retailer to obtain a replacement fuse cover Fuses are for fire protection and do not protect against electric shock Mains plug replacement Should your mains plug need replacing and you are competent to do this proceed as follows If you are in doubt contact your Linn retailer or a competent electrician a Disconnect the plug from the mains supply b Cut off the plug and dispose of it safely A plug with bared conductors is dangerous if engaged in a live socket c Only fit a 13 Amp BS1363A approved plug with a 5 Amp fuse d The cable wire colours or a letter will be marked at the connection points of most quality plugs Attach the wires securely to their respective points The Brown wire must go to the Live pin the Blue wire must go to the Neutral pin and the Green Yellow wire must go to the Earth pin e Before replacing the plug top ensure that the cable restraint is holding the outer sheath of the cable firmly and that the wires are correctly connected WARNING THIS APPLIANCE MUST BE EARTHED 2250 POWER AMPLIFIER OWNER S MANUAL CE Declaration of Conformity Linn Products Ltd declare that this product is in confo
8. copy of the sales receipt to establish the purchase date of the product O Please ensure that your equipment is insured by you during any transit or shipment for repair Linn Products Limited Floors Road Waterfoot Glasgow G76 OEP Scotland UK Phone 44 0 141 307 7777 Fax 44 0 141 644 4262 Helpline 0500 888909 Email helpline linn co uk Website http 7 www linn co uk Linn Incorporated 8787 Perimeter Park Boulevard Jacksonville FL 32216 USA Phone 1 904 645 5242 Fax 1 904 645 7275 Helpline 888 671 LINN Email helpline linninc com Website http www linninc com Linn Deutschland GmbH Albert Einstein Ring 19 22761 Hamburg Deutschland Phone 49 0 40 890 660 0 Fax 49 0 40 890 660 29 Email info linngmbh de Website http 7 www linn co uk LINN 2250 POWER AMPLIFIER OWNER S MANUAL ysi 6ug English x LINN Technical Information Input connectors Unbalanced switch position in Balanced switch position out Pin connections Gain Unbalanced Balanced Input impedance Unbalanced Balanced Input level for clipping Unbalanced Balanced Signal sensing threshold Output power Load tolerance Harmonic distortion Frequency response Peak output voltage 2250 POWER AMPLIFIER OWNER S MANUAL WBT phono socket XLR socket Phono Inner Hot Outer OV XLR Pin 1 OV Pin 2 Hot Pin 3 Cold 28 3dB 22 3dB 7K8ohms 7K8ohms 1 2v rms 2 4v rms g
9. ns may cause harmful interference to radio communications However there is no guarantee that interference will not occur ina particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Copyright and Acknowledgements Copyright Linn Products Limited First edition June 2002 Linn Products Limited Floors Road Waterfoot Glasgow G76 OEP Scotland United Kingdom All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written consent of the publisher Printed in the United Kingdom Linn 2250 and the Linn logo are trade marks of Linn Products Limited The information in this manual is furnished for informational use only is subject to change without notice and should not be construed as a commitment by Linn Products Limited Linn Products Limited assumes no responsibility or liability
10. ow level signals and immunity to noise However residual hiss level from phono preamplifiers at moderate volume settings can be enough to trigger the sensor Mute the preamplifier or turn the volume down after use to prevent this happening If there is audible hum from the loudspeakers then you may have enough noise present to trigger the signal sensor Always try to eliminate any source of hum as this is essential for a system to sound its best Ten minutes after an audio input signal ceases the unit reverts to a low power standby mode Heat The Linn 2250 power amplifier is very powerful and hence must dissipate a lot of heat This is normally done via the internal heat sink and vents in the outer casing However if the amplifier is being worked enthusiastically or has restricted ventilation the unit s two internal fans will operate and will remain running until the internal temperature had dropped to a pre set level 2250 POWER AMPLIFIER OWNER S MANUAL Operation The blue light on the front panel will be dim when power is first applied and remains dimmed when the unit is in standby mode When a signal is detected the light brightens as the amplifier is enabled If the amplifier needs to protect itself for example if the internal temperature gets too high it will shut down for a few seconds and the light will dim There is no half way current limiting the unit can either do what is required of it or will shut down The amplifier
11. plifier circuitry can be instantly altered to suit demand Linn s switch mode power supply is not only efficient it also eliminates mains power distortion resulting in superior performance and sound quality 2250 POWER AMPLIFIER OWNER S MANUAL Aktiv cards The Linn 2250 power amplifier has been engineered to support both passive and active loudspeaker crossovers In a passive crossover the audio signal from a systems amplifier is split by circuitry inside the loudspeaker into bass and treble or bass mid and treble depending on the type and size of loudspeaker With a passive system a portion of the energy in the audio signal is required to power the crossover which naturally has an affect on the overall quality of sound reproduction The benefit of an active system is that the audio signal is split within the amplifier and each split segment is further amplified before being fed to the speakers Active crossover systems sound more dynamic than passive systems as the speakers are provided with more energy to drive them Linn have developed active crossovers called Aktiv cards which have been optimised for our range of loudspeakers Once fitted Aktiv cards can be fine tuned to suit the requirements of your room and enhance your listening experience Aktiv cards can be fitted into your Linn 2250 power amplifier by your local Linn specialist retailer Unpacking The Linn 2250 power amplifier comes in a box with the following accesso
12. red conductors is dangerous if engaged in a live socket The Brown wire must be connected to the Live Line supply pin The Blue wire must be connected to the Neutral supply pin The Green Yellow wire must be connected to the Earth Ground supply pin Please contact your retailer or a competent electrician if you are in any doubt LINN GENERAL SAFETY INSTRUCTIONS nawy 14 15 16 18 19 20 Read instructions Read the safety and operating instructions before operating the appliance Retain instructions Retain the safety and operating instructions for future reference Heed warnings Observe all warnings on the appliance and in the operating instructions Follow instructions Follow all operating and use instructions Water and moisture Do not use the appliance near water for example near a bathtub washbowl kitchen sink laundry tub in a wet basement or near a swimming pool and the like Carts and stands Use only with a cart or stand that is recommended by the manufacturer An appliance and cart combination should be used with care Quick stops excessive force and uneven surfaces may cause the appliance and cart combination to overturn Wall or ceiling mounting Mount to a wall or ceiling only as recommended by the manufacturer Ventilation Site the appliance so that its location or position does not interfere with its proper ventilation For example the appliance should not be situated on a bed sofa rug
13. ries O 2 x 1 2m phono leads O 2 pairs of speaker plugs mains lead warranty card this manual We recommend that you retain all packaging in case you need to transport the unit at a later date Voltage Selection N Do not connect the mains supply until you have verified that the unit is set to the correct voltage for your mains supply The unit is factory set for a 230 volt mains supply and must not be connected to a mains supply other than this before it is adjusted for your local voltage To set the voltage use a screwdriver to adjust the voltage selector on the back of the unit to the correct setting A This unit must be earthed Use the earthed moulded mains lead supplied Never use an unearthed plug or adaptor Positioning Allow at least 10cm of space to the front rear sides and above the Linn 2250 power amplifier Do not block the ventilation grills on the front of the unit or the vents on the sides top and bottom The unit can be rack mounted in a 19 rack Linn part No RAKK 19 1 Cleaning Disconnect the Linn 2250 power amplifier from the power supply before cleaning Remove dust and fingerprints with a soft damp cloth Avoid using domestic cleaning products on the unit z LINN Inputs and Outputs The unit has both unbalanced and balanced inputs selected by a push button switch on the back panel Use the appropriate push button position to suit your choice of preamplifier and cabling The L
14. rmance with the Low Voltage Directive 73 23 EEC and Electromagnetic Compatibility 89 336 EEC as amended by 92 31 EEC and 93 68 EEC The conformity of the designated product with the provisions of Directive number 73 23 EEC LVD is proved by full compliance with the following standards Standard number Date of issue EN60065 1998 Test type General requirements Marking Hazardous radiation Heating under normal conditions Shock hazards under normal operating conditions Insulation requirements Fault conditions Mechanical strength Parts connected to the mains supply Components Terminal devices External flexible cords Electrical connections and mechanical fixings Protection against electric shock Stability and mechanical hazards Resistance to fire The conformity of the designated product with the provisions of Directive number 89 336 EEC EMC is proved by full compliance with the following standards Standard number Date of issue Test type EN55013 2001 Conducted emissions EN55013 2001 Absorbed emissions EN55020 2002 Immunity FCC Notice NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructio
15. t 150uV 230W rms into 4ohms TI5W rms into 80hms Unconditionally stable into all loudspeaker loads lt 0 02 7Hz to 35kHz 3dB 45V Protection Fuse rating Mains input range Maximum input power Typical operating input power Standby power Dimensions Weight T6 3A 90VAc 126VAc 200VAc 253Vac 50 60Hz 1000W 44W 15W 75mm H x 381mm W x 354mm D 5 25kg Pack 756
Download Pdf Manuals
Related Search