Snell Acoustics AMC550mp Stereo Amplifier User Manual
Contents
1. Room Layout v Alternative Room Layout YAN 5 Back Wall Placement When placing the AMC550mp s behind your listening area keep them as close to the side walls as possible but no closer than 12 inches 30cm Diffuse Direct Surround Mode Patterns Diffuse Setting ULI AMC550mp Wall Direct Setting WELLL LLL LLL AMC550mp Wall When the surround mode switch under the grille is set to Diffuse the AMC550mp produces the sound radiation pattern shown in the upper diagram The speaker will radiate energy in all directions except perpendicular to the mounting plane Listeners in this area will primarily hear sound that is reflected off of other surfaces in the room This gives the system a diffuse hard to localize effect that can be very good for surround applications Setting the switch to Direct makes the AMC550mp produce the sound radiation shown in the lower illustration The sound energy is strongest directly in front of the speaker The direct setting will draw your attention toward the speaker and produce more dramatic off screen pans See the following section for more details Special Note For Use As Front Channel Speakers If you are planning on using the AMC550mp s as wide coverage front channel speakers use only the Direct setting and place them as near to seated ear level as is practical AMC550mp OPERATION AND USE One of the best feature2. Owner s Manual SPECIFICATIONS Frequency Response 3dB Recommended Amplifier Power Nominal Impedance Sensitivity 2 83v at 1m High Frequency Drivers Bass Unit Crossover Frequency Grille Dimensions H x W x D Rough Opening Requirements H x W x D Shipping Weight Pair Finish 80Hz 20kHz 15 150 watts 8 ohms 85dB SPL Two 21 2 inch 65mm polymer treated cones 51 4 inch 135mm copolymer cone with butyl rubber surround 900Hz Perforated metal painted white 81 4 x 151 8 x 31 4 inches 210 x 384 x 64mm 7 2 x 14 8 x 33 4 inches 190 x 358 x 95mm 14 Ibs 6 4 Kg Matte white suitable for painting PRODUCT DESCRIPTION By providing the choice of diffuse field or direct field response and the means to easily switch between them the AMC550mp offers the ideal performance for today s surround applications Furthermore this unique two way system mounts flush with the wall surface and virtually disappears in the listening room In addition to its superb surround perfor mance its excellent performance as a direct radiator makes it equally suitable for front channel use Inside the AMC550mp are two subenclosed 21 2 65mm high frequency drivers One fires forward the other rearward Frequencies below 900Hz are handled by a 51 4 135mm driver with butyl rubber surrround Gold plated five way binding posts allow quick connection to virtually any speaker cable The front surface has a matte white fin
3. Run the wire from the amplifier to the cutout Allow an extra foot of wire at the cutout Strip 1 2 12mm off the wire and tightly twist the wire strands together 3 Remove speaker grille by carefully prying each corner with an awl or a small screwdriver 4 Prepare the speaker bracket assembly for installation as shown Note The AMC550mp is sold in mirror imaged pairs On the back of each system is a label that specifies the screen direction In the diffuse mode the response will be slightly superior in this direction Install the two systems so that the arrows point toward the screen If listeners are not going to be located on or near the center axis of the speaker the speaker should be oriented with the arrow toward the listener location even if this is away from the screen Warning To prevent electrical shock always switch off the amplifier or receiver when making connections to the speaker Important Typically one side of the wire is smooth Connect this side to the black speaker terminal The other side has a rib or stripe Connect this to the red speaker terminal Connect wire at the amplifier in the same way Failure to do so will result in degraded sound 5 Install speaker according to diagram below Important Do not overtighten screws Doing so will break the frame and or make it impossible to insert the grille gut gt bs fr L gt The power recommendation for the system assumes you will
4. g sense of a diffusion oriented surround speaker or a more direct surround effect proper placement of your AMC550mp s will enable you to achieve it Using the following guidelines will help you get the most from your speakers Every room is different so there are no hard and fast rules for placement Don t be afraid to experiment A few minutes spent working on determining the best place for your speakers will help ensure they sound their best Height Place the AMC550mp s at least 5 feet 1 5m from a floor yet 12 inches 30cm from the ceiling A fairly high mounting location will aid in sound diffusion and reduce the chance you will be able to audibly locate the speakers Increased height will also help to even out the sound levels across the listening area Boundaries Keep the AMC550mp s at least 12 inches 30cm away from an adjacent wall or large obstacle Coverage Area For large areas multiple AMC550mp s can be used to ensure even coverage Use one pair of AMC550mp s for every three rows of seats approximately 10 feet between the speakers Placement Please consult the placement diagram To achieve the greatest sense of sound envelopment place the AMC550mp s to the side of the listening area If the listening area is against a wall for example if your couch is placed against a back wall place the AMC550mp s to the side of the couch leaving at least 12 inches 30cm between the AMC550mp s and the back wall Conventional
5. ish suitable for use in a variety of environents For a AMC550mp Mounting Bracket 0 0 0 a 81 4 210mm o 0 0 o 14 i 355mm g Side View ounting Hole 7 190mm 31h 14 e 33mm i 358mm gt perfect custom finish the grille may be painted using the supplied paint mask INSTALLATION INSTRUCTIONS IMPORTANT This manual assumes the installer possesses skill in the proper use of hand and power tools knowledge of local building and fire codes and a familiarity with the environ ment behind the wall or ceiling in which the speakers will be installed Examine the contents of the shipping carton and verify it contains the following Model AMC550mp Loudspeaker Mounting Bracket Painting Mask Metal Grille Template Owner s Manual PAINTING THE SPEAKERS If you intend to paint the speakers it is best to do so before installation 1 Remove the speaker grille by carefully prying each corner with an awl or small screwdriver 2 Place a strip of wide masking tape over each of the holes in the paint shield Place the paint shield on the front of the speaker and press on the tape to hold it in position on the front of the speaker baffle z A n hole in paint shield pe 3 After painting carefully remove the paint shield HOW TO PLACE YOUR AMC550mp s Determining Room Placement Whether you prefer the envelopin
6. operate the amplifier in a way that will not produce distortion All speakers can be damaged by even a modest amplifier if it is producing distortion If you hear a gritty noise or other signs of strain turn down the volume Prolonged or repeated operation of your speakers with a distorted signal can cause damage that is not covered by the warranty It is especially important that you do not overdrive the bass capability of smaller speakers Watch for noises such as pops caused by the music s bass line Use of the loudness control and or full bass boost at louder volumes is likely to overdrive the woofer Use such controls sparingly 4 il gt y Hl LISTENING LEVELS AND POWER HANDLING HOW TO CARE FOR YOUR SPEAKERS gt Use a soft terry cloth towel slightly dampened with water glass cleaner or a diluted mild detergent The towel should be just damp enough to wipe the surface clean without leaving a trail of moisture B Do not use abrasive cleaners or any cleaner containing chemicals harsher than those found in glass cleaner LIMITED WARRANTY For five years from the date of purchase Snell Acoustics will repair for the original owner any defect in materials or workmanship that occurs in normal use of the speaker system without charge for parts and labor Your responsibilities are to use the product according to the instructions supplied to provide safe and secure transportation to an authori
7. s of the AMC550mp is that it can be switched between Direct and Diffuse radiation modes The surround mode switch is conveniently located under the grille to allow easy access See Diagram for toggle switch location Refer to the switch diagram and the figures to determine the appropriate setting You should take some time and experiment to best adapt the speaker to your listening habits The diffuse mode is preferable when the listener should not be able to localize the sound source This should be perceived as wall of sound Music with side channels encoded with hall effects will produce a feeling of envelopment Surround encoded baseball games will be heard as if the stadium were all around with no clear source of off the field realism enhancing effects Both music and movies will have instances when either direct or diffuse surround sound will suit Music recordings with musicians in the side channels will most likely sound best in direct mode However if the side channels are used to record the performance environment or audience sounds the diffuse mode may be best Similarly with movie soundtracks some producers will use side channels to pan discrete sources off screen e g jet fly bys etc This material will be well served with the direct mode Other movies will use the side channels to transport you to a remote environment with street noises crowd noises etc These may be best reproduced in diffu
8. se mode PREPARING FOR INSTALLATION Preparing for Installation Map out the wiring paths from the speakers to the amplifier We recommend 16 gauge wire for runs up to 25 feet and 14 gauge or thicker for longer runs Be sure the speaker wire does not rest or rub against any sharp or pointed objects The speakers should be mounted on a flat surface to form a good seal between the speaker flange and the mounting surface Each speaker is 8 ohms nominal When connecting more than two speakers per amplifier channel you should use series parallel wiring or line transformers In all cases make certain that the total impedance does not fall below the amplifier s minimum rating If you are not sure contact your Snell Acoustics dealer You Will Need 1 A utility knife an electric jigsaw or another means of cutting a hole in the mounting surface 2 Phillips screwdriver A wire cutter or stripper for preparing the speaker wires An awl or a small screwdriver to remove the speaker grille RY With the hardware supplied the speaker can be installed in existing walls and ceilings from 1 2 12mm to 11 2 38mm thick For thinner walls you will need to use spacers not provided for the mounting bracket In walls greater than 11 2 38mm thick you will need longer screws Installation 1 Make a cutout using the supplied template fa gt R gt a 141 s 358mm J lt A 2
9. zed Snell Acoustics service representative and to present proof of purchase from an authorized Snell dealer in the form of your sales slip when requesting service Excluded from this warranty is damage that results from abuse misuse accidents shipping repairs or modifications by anyone other than an authorized Snell Acoustics service representative This warranty is void if the serial number has been removed or defaced This warranty gives you specific legal rights and you may also have other rights that vary from state to state If Service Seems Necessary Contact the dealer from whom you purchased the speaker system If that is not possible call us at 978 538 6262 or write to Snell Acoustics 300 Jubilee Drive PO Box 3717 Peabody MA 01960 We will promptly advise you of what action to take If it is necessary to return your speaker system to the factory please ship it prepaid in the original factory packaging Please note that Snell Acoustics will not be held liable for shipping damage due to improper packaging After it has been repaired we will return it freight prepaid in the U S or Canada 2005 Snell Acoustics All Rights Reserved Specifications are subject to change without notice Covered by patents issued and or pending Part 542 1015 Snell 300 Jubilee Drive PO Box 3717 Peabody MA 01961 3717 phone 978 538 6262 fax 978 538 6266 email info snellacoustics com www snellacoustics com
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