Infinity 1200S Speaker User Manual
Contents
1. YVinfiniy POWERED SUBWOOFER Owner s Guide Infinity Alpha 12005 IMPORTANT SAFETY PRECAUTIONS Read First RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance 1 Read Instructions All the safety and operating instructions should be read before the product is operated 2 Retain Instructions The safety and operating instructions should be retained for future reference 3 Heed Warnings All warnings on the product and in e operating instructions should be adhered to 4 Follow Instructions All operating and use instructions should be followed 5 Cleaning Unplug this product from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning 6 Attachments Do not use attachments not recommended by the product manufacturer as they may cause hazards 7 Water and Moisture To reduce the risk of fire or electric shock do not use this product outdoors or near water for example near a bathtub was2. Since the installation of a subwoofer can be somewhat more complicated than installing full range speakers it is essential that you read this section very carefully prior to connecting the subwoofer to your system Should you have questions relating to your installation it is advisable to call either your dealer or Infinity s Customer Service Department for advice The performance of the subwoofer is directly related to its placement in the listening room and how you align the subwoofer with its satellite speakers Setting the volume of the subwoofer in relationship to the left and right speakers is also of critical importance because itis essential that the subwoofer integrate smoothly with the entire system Setting the subwoofer s volume lt suB level too high will result in an overpowering boomy bass Setting L the volume level too low will negate the benefits of the subwoofer a OO lt RIGHT Here are several additional facts on installation that may prove pi kn useful It is generally believed by most audio authorities that low frequencies below 125Hz are nondirectional and therefore placement of a subwoofer within any listening room is not critical While in theory it is true that the larger wavelengths of extremely low frequencies are basically nondirectional the fact is that when installing a subwoofer within the limited confines of a room reflections standing waves and absorptions generated within the room wil
3. Pass and the subwoofer set to On e Set the Bass Optimization System Selector to On For best results it is recommended that all major furnishings are in place and that all doors and windows in the listening area are in their normal positions That is if you normally listen to music with all doors closed then this is how they should be during this procedure INFINITY ALPHA 1200s To solve a problem it helps to first identify whether you have one and if so what it is First play a variety of music and films with energetic bass sounds like bass guitar kick drum keyboards etc A kick drum should produce a tight thump not a flabby boom Bass melody or harmony lines should have notes that are about equally loud If some notes disappear or stand out because they are consistently too loud there is a problem Disappearing notes have to be handled by moving the listening position or the loudspeakers to slightly different locations Often but sadly not always this will be enough Excesses in bass tend to be most annoying and energetic resonances that cause boomy or lumpy bass can be truly aggravating over a period of time Infinity s Bass Optimization System can fix this So the first step is to exercise your music collection and listen for low frequency problems that crop up in several different recordings Something that only happens in one recording is likely to be a problem in the recording it happe
4. Inc 250 Crossways Park Drive Woodbury NY 11797 USA 800 553 3332 USA only www infinitysystems com Trademark of Dolby Laboratories DTS is a registered trademark of Digital Theater Systems Inc Infinity is a registered trademark and Ceramic Metal Matrix Diaphragm C M M D and Bass Optimization System B 0 S are trademarks of Harman International Industries Incorporated Ceramic Metal Matrix Diaphragm C M M D patent nos 6 327 372 and 6 404 897 Part No 350614 001
5. a Y connector Simply connect the LFE output on your receiver processor to either the left or right input on the subwoofer INFINITY ALPHA 1200s OPERATION Power On Plug your subwoofer s AC cord into a wall outlet Do not use the outlets on the back of the receiver Initially set the Subwoofer Gain Volume Control to the min position Turn on your sub by pressing the Power Switch on the rear panel Auto On Standby With the Power Switch in the ON position the Power Indicator LED will remain backlit in red or green to indicate the On Standby mode of the subwoofer RED STANDBY No signal detected Amp Off GREEN ON Signal detected Amp On The subwoofer will automatically enter the Standby mode after approximately 10 minutes when no signal is detected from your system The subwoofer will then power ON instantly when a signal is detected During periods of normal use the Power Switch can be left on You may turn off the Power Switch for extended periods of nonoperation e g when you are away on vacation Adjust Gain Turn on your entire audio system and start a CD or movie soundtrack at a moderate level Turn up the Subwoofer Gain Volume Control about half way If no sound emanates from the subwoofer check the AC line cord and input cables Are the connectors on the cables making proper contact Is the AC plug connected to a live receptacle Has the Power Switch been pressed to the On
6. ass Filter Selector Power Indicator Crossover Adjustment Subwoofer Gain Volume Control D Line Level Inputs High Level Speaker Inputs High Level Speaker Outputs Power Switch POWER ima ON L o AC 120V 60HZ 500W INFINITY ALPHA 12005 a AN If your receiver processor has subwoofer outputs for the left and right channels If your receiver amplifier does not have subwoofer AECENGA EROSESSOR outputs for the left and right channels or an LFE Sueur output RECEIVER AMPLIFIER Front Speaker Output LEFT RIGHT S Infinity Alpha 1200s Yilhfinity l Mm Alpha 1200s 7 ii Ng a e Set Low Pass Filter to On spa NOTE Some receivers have a single subwoofer output do not confuse J this with a single LFE output as described below In that case it is recommended that you use a Y connector not included to maximize performance LEFT SPEAKER RIGHT SPEAKER If you have a Dolby Digital or DTS receiver processor with a low frequency effects LFE output e Set Low Pass Filter to On BLACK 6 6 6 1 LOOSEN TERMINALS peho a o o GE ynny D ren Alpha 12005 STRIPE NO STRIPE ki a ON OFF S Set Low Pass Filter to Off NOTE In this case you do not need to use
7. condition 24 Wall or Ceiling Mounting The product should be mounted to a wall or ceiling only as recommended by the manufacturer 25 Heat The product should be situated away from heat sources such as radiators heat registers stoves or other products including amplifiers that produce heat 0 e lt _ _____ Antenna Lead In Wire Ground Clamp Antenna Discharge Unit NEC Section 810 20 Grounding Conductors NEC Section 810 21 Electric Service Equipment Ground Clamps Power Service Grounding Electrode System NEC Art 250 Part H INFINITY ALPHA 12005 OWNER S GUIDE Table of Contents uo F amp F Ww Pr Important Safety Precautions Unpacking the Subwoofer Placement Controls and Connections Connections Operation Bass Optimization System Maintenance and Service Specifications INFINITY ALPHA 1200s Infinity Alpha Series The Infinity Alpha Series of loudspeakers continues Infinity s long standing commitment to accurate sound reproduction Our patented Ceramic Metal Matrix Diaphragm C M M D drivers and proprietary Bass Optimization System along with precision dividing networks and rigid well braced enclosures combine to deliver uncompromised performance in any stereo or multi channel home theater Unpacking the Subwoofer If you suspect damage from transit report it immediately to your dealer Keep the shipping carton and packing materials for future use
8. h bowl kitchen sink or laundry tub in a wet basement near a Swimming pool or the like 8 Accessories Do not place this product on an unstable cart stand tripod bracket or table The product may fall causing serious injury to a child or adult and serious damage to the product Use only with a cart stand tripod bracket or table recommended by the manufacturer or sold with the product Any mounting of the product should follow the manufacturer s instructions and should use a mounting accessory recommended by the manufacturer 9 A Product and Cart Combination Should Be Moved with Care Quick stops excessive force and uneven Y Surfaces may cause the product and cart combination to overturn 10 Ventilation Slots and openings in the cabinet are provided for ventilation and to ensure reliable operation of the product and to protect it from overheating and these openings must not be blocked or covered The openings should never be blocked by placing the product on a bed sofa rug or other similar surface This product should not be placed in a built in installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer s instructions have been adhered to Cii INFINITY ALPHA 1200s a 11 Power Sources This product should be operated only from the type of power source indicated on the marking label If you are not sure of the type of
9. his except for patient trial and error repositioning of the loudspeakers and listeners Usually the practical constraints of a living space and the impracticality of massive acoustical treatment mean that equalization is the only practical solution Professional sound engineers routinely employ sophisticated measurement systems and equalizers to optimize speakers to the installation This was never practical for the home audiophile This is why the Bass Optimization System was created It enables you to identify the dominant low frequency response characteristic of your room Once you know the problem the Bass Optimization System provides the tools needed to optimize the low frequency characteristics of the speakers to the room they are in exactly as the professional sound engineers do it Preparations Before beginning the bass tests please check the following e Make sure all three Bass Optimization System controls on the subwoofer are turned fully clockwise e Make sure the loudness contour if any on your receiver processor preamp is turned off e Set the receiver s processor s tone controls Bass and Treble to their center or flat positions e Bypass all surround and effects features of your receiver processor preamp or set to Stereo Bypass e If you are using a multichannel surround processor or receiver make sure all bass management features are properly set The Audio channels should all be set to Small or High
10. ion of this kit the Bass Optimization System becomes truly room adaptive The kit consists of the following a test CD a sound level meter that is specifically calibrated for low frequencies and something we call a Q Finder a device to help find the width of the measured curve and finally a measurement template It works as follows The listener plays the tones from the test CD and records the relative output level of each test tone using the sound level meter on the provided measurement template After all the tones are complete the template contains a response curve for the frequencies below 100Hz The user simply notes the frequency of the largest bass peak calculates the correct amount of attenuation and uses the Q Finder to determine the width of the curve These three values are dialed into the Bass Optimization System controls located on the speaker The entire process takes less than twenty minutes If your dealer does not stock the Bass Optimization System test and measurement kit you may purchase it directly from Infinity U S residents can visit our Web site at www infinitysystems com or call 1 800 553 3332 Canadian residents should contact their dealer or call 1 800 567 3275 MAINTENANCE AND SERVICE The enclosure may be cleaned using a soft cloth dampened with water only to remove fingerprints or to wipe off dust The grille may be gently vacuumed Stains may be removed with an aerosol cleaner followi
11. l strongly influence the performance of any subwoofer PRIMARY system As a result the specific location of the subwoofer becomes Li LISTENING h AREA important and we strongly recommend that you experiment with placement before choosing a final location Placement will depend upon your room and the amount and quality of bass required for example whether or not your room permits Figure 1 This example shows the subwoofer positioned behind placement of the subwoofer near either satellite the right channel satellite speaker to re create the actual location of bass instruments in an orchestra and or add impact to movie soundtracks INFINITY ALPHA 12005 CONTROLS AND CONNECTIONS Rear Panel BASS OPTIMIZATION SYSTEM o e e e 6 6 6 M1 0 LEVEL Bass Optimization Controls See page 5 Bass Optimization System Selector Center Frequency Adjustment Bass Optimization System Level Adjustment 0 Bass Optimization System Bandwidth Adjustment Yinfinity CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING To REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE AVERTISSEMENT POUR PR VENIR LES RISQUES D INCENDIE OU DE CHOC LECTRIQUE VITER D EXPOSER CET APPAREIL A LA PLUIE OU A L HUMIDIT NETU BAS cee Infinity Systems Inc Northridge CA USA H A Harman Intemational Company Phase Switch Low P
12. n wire to an antenna discharge unit size of grounding conductors location of antenna discharge unit connection to grounding electrodes and requirements for the grounding electrode See Figure A 16 Lightning For added protection for this product during a lightning storm or when it is left unattended and unused for long periods of time unplug it from the wall outlet and disconnect the antenna or cable system This will prevent damage to the product due to lightning and power line surges 17 Power Lines An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits or where it can fall into such power lines or circuits When installing an outside antenna system extreme care should be taken to keep from touching such power lines or circuits as contact with them might be fatal Figure A Example of Antenna Grounding as per National Electrical Code ANSI NFPA 70 Za 18 Overloading Do not overload wall outlets extension cords or integral convenience receptacles as this can result in a risk of fire or electric shock 19 Object and Liquid Entry Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short out parts that could result in a fire or electric shock Never spill liquid of any kind on the product 20 Servicing Do not attempt to service
13. ng its instructions Do not use any solvents on the grille All wiring connections should be inspected and cleaned or remade periodically The frequency of maintenance depends on the metals involved in the connections atmospheric conditions and other factors but once per year is the minimum If a problem occurs make sure that all connections are properly made and clean In the event that your Infinity Alpha subwoofer ever needs service contact your local Infinity dealer or Infinity directly at 1 800 553 3332 or www infinitysystems com for a service center near you INFINITY ALPHA 1200s 6 SPECIFICATIONS Infinity Alpha 1200s Frequency Response 28Hz 150Hz 3B Maximum Amplifier Output 500 watts RMS 20Hz 150Hz with no more than 0 1 THD Crossover Frequencies 50Hz 150Hz 24dB octave continuously variable Driver 12 305mm C M M D Dimensions H x W x D 17 1 2 x17 1 4 x 18 1 4 445mm x 438mm x 464mm Weight 45 Ib 20 5kg Optional Accessory Bass Optimization Test amp Measurement Kit Part Number 335852 002 Infinity continually strives to update and improve existing products as well as create new ones The specifications and construction details in this and related Infinity publications are therefore subject to change without notice INFINITY ALPHA 1200s INFINITY ALPHA 1200s Vinfiniy H A Harman International Company 2002 Harman International Industries Incorporated Infinity Systems
14. ns If you identify something that is consistently wrong select a record that Shows it very clearly and put your CD DVD player into a repeat mode A B repeat is especially helpful because you can isolate a short musical passage Set the Bass Optimization System Bandwidth Adjustment Control to a middle position 10 clicks from a fully clockwise position and set the Level adjustment for a 6dB 8 clicks from a fully clockwise position Then while the music is playing sit in your favorite chair and have somebody else slowly adjust the Center Frequency control from fully clockwise to fully counter clockwise At a certain frequency you should hear the problem lessen and the overall bass performance improve When you are satisfied that you have found the best frequency have your assistant vary the Level slowly up and down until you have maximized the improvement If you have really keen ears you can also have the Bandwidth Adjustment control adjusted for maximum benefit While the Bass Optimization System allows the listener to fine tune the bass response to sound best in a particular room some listeners don t have the skill or desire to adjust their system by ear In order to facilitate quicker and more accurate results Infinity has developed an optional test and measurement kit that allows the user to perform a series of measurements and aids him her in properly setting the Bass Optimization System controls With the addit
15. position Once you have confirmed that the subwoofer is active proceed by playing a CD record or cassette Use a selection that has ample bass information Set the overall volume control of the preamplifier or stereo to a comfortable level Adjust the Subwoofer Gain Volume Control until you obtain a pleasing blend of bass Bass response should not overpower the room but rather be adjusted so there is a harmonious blend across the entire musical range Many users have a tendency to set the subwoofer volume too loud adhering to the belief that a subwoofer is there to produce lots of bass This is not entirely true A subwoofer is there to enhance bass extending the response of the entire system so the bass can be felt as well as heard However overall balance must be maintained or the music will not sound natural An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive Crossover Adjustments The Crossover Adjustment Control determines the highest frequency at which the subwoofer reproduces sounds If your main speakers can comfortably reproduce some low frequency sounds set this control to a lower frequency setting between 50Hz 100Hz This will concentrate the subwoofer s efforts on the ultradeep bass sounds required by today s films and music If you are using smaller bookshelf speakers that do not extend to the lower bass frequencies set the Crossover Adjus
16. power Supply to your home consult your product dealer or local power company For products intended to operate from battery power or other sources refer to the operating instructions 12 Grounding or Polarization This product may be equipped with a polarized alternating current line plug a plug having one blade wider than the other This plug will fit into the power outlet only one way This is a Safety feature If you are unable to insert the plug fully into the outlet try reversing the plug If the plug should still fail to fit contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the polarized plug 13 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 paying particular attention to cords at plugs convenience receptacles and the point where they exit from the product 14 Nonuse Periods The power cord of the product should be unplugged from the outlet when left unused for long periods of time 15 Outdoor Antenna Grounding If an outside antenna or cable system is connected to the product be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA 70 provides information with regard to proper grounding of the mast and Supporting structure grounding of the lead i
17. this product yourself aS opening or removing covers may expose you to dangerous voltage or other hazards Refer all servicing to qualified service personnel 21 Damage Requiring Service Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions a The power supply cord or the plug has been damaged or b Objects have fallen onto or liquid has been spilled into the product or c The product has been exposed to rain or water or d The product does not operate normally when following the operating instructions Adjust only those controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation or e The product has been dropped or damaged in any way or f The product exhibits a distinct change in performance this indicates a need for service 22 Replacement Parts When replacement parts are required be sure the service technician has used replacement parts specified by the manufacturer or that have the same characteristics as the original part Unauthorized substitutions may result in fire electric shock or other hazards 23 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
18. tment Control to a higher setting between 120Hz 150Hz Note This control will have no effect if the Low Pass Filter Selector Switch is set to Off If you have a Dolby Digital or DTS processor receiver the Crossover Frequency is set by the processor receiver Consult your owner s manual to learn how to view or change this setting Phase Control The Phase Switch determines whether the subwoofer speaker s piston like action moves in and out with the main speakers 0 or opposite the main speakers 180 Proper phase adjustment depends on several variables such as room size subwoofer placement and listener position Adjust the phase switch to maximize bass output at the listening position INFINITY ALPHA 1200s BASS OPTIMIZATION SYSTEM Infinity s Bass Optimization System is a simple to use yet sophisticated low frequency calibration system Each Interlude subwoofer contains a parametric equalizer that you can adjust following the directions below By following these instructions you can improve the sound of your system The Bass Optimization System Goal Itis a fact of audio that what we hear at low frequencies is determined as much or more by the listening room than by the loudspeaker itself Placement of the loudspeakers and listeners and the acoustical characteristics of the room surfaces are all important determinants of bass quantity and quality In most practical situations there is little that can be done about t
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