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5

Unpacking the System

Carefully unpack the speakers. If there is any sign of damage from transit, report it immediately to your dealer or delivery service. 

Retain the shipping carton and packing materials for future use.

Grilles

The cloth grilles should remain on the speaker during normal use. However, to remove a grille, use your fingers to carefully 

pry the top edge of the grille away from the cabinet so you can insert your fingers between the grille and the cabinet. Then 

slide your fingers down the inside of the grille frame from top to bottom which will cause the grille to pop free. The grille is 

NOT designed to be removed by only pulling on one side. The pins that hold the grille can be damaged. Also, do not use any 

objects other than your fingers to remove the grille as the finish or grille may be damaged. Be careful to keep rings, watches 

and other sharp objects from scratching the finish or tearing the grille cloth.

To replace the grille, carefully align the two pins at the top of the grille with their corresponding grommets and gently push 

them in until the grille is supported by the grommets. Then work your way down the grille gently pushing the grille pins into 

the grommets evenly until the grille is fully seated. Be careful to align the pins with the grommets so the cabinet, grille pins 

and grommets are not damaged. Also, take care to support the speaker so it does not tip over or fall off its mounting location 

while the grille is being removed or replaced. 

MCenter Note:

  The same grille removal and replacement procedures apply 

to the MCenter except you will begin at the left or right side and work towards the opposite side. 

MSubwoofer Note: 

 The 

MSubwoofer grille is not removable.

Feet & Spikes

The M350, M340 and M250 come with rubber feet installed at the factory which are ideal for hardwood floors. Spikes are also 

included for placement on a carpeted surface. To install the spikes, carefully lay the speaker on its back on a soft, debris-free 

surface and remove the rubber feet by hand turning them counter-clockwise. Thread the spikes by hand to make sure they 

are inserted properly. Save the rubber feet for future use.

The M25, MCenter, and MSurround come with rubber stand-offs that are designed to be attached to the bottom of the  

loudspeaker when stand, shelf or cabinet mounting. This will minimize the vibration transferred from the loudspeaker to the 

stand, shelf or cabinet. It will also help to protect the finish of the loudspeaker and the mounting location. The MSubwoofer 

comes with rubber feet installed at the factory.

MSurround Note: 

 It is recommended to mount the rubber stand-offs on the back of the side panels of the MSurround if it is 

going to be wall mounted. This will minimize the amount of vibration that is transferred directly to the wall. You may need to 

adjust the depth of the mounting screws to help ensure that the speaker is not mounted too loosely or too tightly.

Where to Place the Speakers

Summary of Contents for M25

Page 1: ...M Series Loudspeakers OWNER S MANUAL SAFETY INSTRUCTIONS COMPLIANCE INFORMATION Español Parlantes Serie M Français Haut parleurs Serie M ...

Page 2: ...ear and sides of the apparatus for sufficient ventila tion The ventilation should not be impeded by covering the ventilation openings or placing on or around the apparatus items such as newspapers table cloths curtains etc 15 No open flame sources such as lighted candles should be placed on the apparatus 16 The apparatus shall not be exposed to dripping or splash ing No objects filled with liquids suc...

Page 3: ...r Boston Acoustics speakers providing great results regardless of the system configuration and speaker types We hope that you enjoy your Boston Acoustics purchase for many years to come Features Second generation Extended Wide Bandwidth EWB Tweeter M350 M340 M250 M25 to minimize phase shift and distortion while improving pistonic motion Balanced Mode Radiator BMR high frequency diver MCenter MSurro...

Page 4: ...03 8 x 813 16 x 117 16 387 16 x 95 8 x 913 16 123 8 x 615 16 x 103 16 107 6 x 24 5 x 31cm 102 6 x 22 4 x 29cm 97 6 x 24 5 x 25cm 31 4 x 17 6 x 25 8cm Weight 55 9 lbs 25 4kg 46 3 lbs 21 0kg 35 3 lbs 16 0kg 14 7 lbs 6 7kg Specifications MCenter MSurround MSubwoofer Frequency Range 3dB 68Hz 22kHz 95Hz 22kHz 23Hz 150Hz High Frequency Driver 2 6 4cm 2 6 4cm BMR flat planel BMR flat planel Low Frequency Dr...

Page 5: ...peaker so it does not tip over or fall off its mounting location while the grille is being removed or replaced MCenter Note The same grille removal and replacement procedures apply to the MCenter except you will begin at the left or right side and work towards the opposite side MSubwoofer Note The MSubwoofer grille is not removable Feet Spikes The M350 M340 and M250 come with rubber feet installed ...

Page 6: ... two ports are aimed towards the ceiling If the speaker is mounted within 3 inches 76mm of the ceiling it is advisable to position the speaker so that the two ports are aimed towards the floor There are two 4 way hangers built into the back of the MSurround for wall mounting the loudspeaker vertically or horizontally with the ports pointing in either direction It is recommended to mount the rubber ...

Page 7: ...5m of the front speakers The perceived level of bass output from the subwoofer will vary significantly at different positions in the room When placed near walls the output level is empha sized with corner placement providing the highest perceived output level Placement away from walls may produce too little perceived bass Regardless of the perceived bass level within the room you always have the abi...

Page 8: ...ithin a receiver We recommend consulting your receiver manual for further assistance in this area Use an audio RCA cable not included as shown to connect your digital receiver s LFE subwoofer output to the subwoofer Connect the other end to the Line Level LFE input Connecting to Electronics Without a Subwoofer Output If the preamp receiver in your system does not have a subwoofer or LFE output you...

Page 9: ...is used instead of line level cables this incompatibility can result in an audible hum when the receiver is turned off or switched to a different speaker channel If this should happen with your MSubwoofer you will need to make a ground cable and connect it to either RCA line input on the subwoofer and any unused RCA line input or output on your receiver see diagram The proper ground cable for this a...

Page 10: ...Set this switch to provide the fullest most dynamic bass The effect of phase will be most audible on low frequency percussion instruments or music with a continu ously repeating bass line Crossover Control Adjusts the frequency of the low pass filter for the MSubwoofer Note This control is not active when using the LFE input jack Volume Control Turn the MSubwoofer Volume control to the 11 o clock po...

Page 11: ...on 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 which vary from state to state If Service Seems Necessary First contact the dealer from whom you purchased the product Or contact us via e mail at US support bostona com Japan ba_info dm holdings com Asia Pacific service dm singapore com If that i...

Page 12: ...bostonacoustics com 2013 All rights reserved Boston Boston Acoustics and the B A ellipse symbol are registered trademarks and Boston Lo Q is a trademark of Boston Acoustics Inc Specifications are subject to change without notice 142 004248 5 Boston ...

Page 13: ...e reverse side Retire y lea el reverse S il vous plait supprimer et lire au verso Per favore di togliere e leggere illata di retromarcia Vanligen flytta och las den motsatta sidan Bitte entfernen Sie und lesen Sie die ROckseite ...

Page 14: ...ita che copre il deflettore come parte del suo design estetico e acustico Questo materiale in similpelle econsiderevolmente piu morbido dellegno e piu suscettibile a rivelare impronte temporanee mentre l apparecchio rimane nella confezione Questa comportamento e normale perquesta tipo di materiale e se si presentano delle impronte visibili dopo l apertura dellaconfezione queste dovrebbero scompari...

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