Experience rich sound while enjoying music, movies, and more with the M340 Floorstanding
Loudspeaker from Boston Acoustics. This three-way speaker combines a 1-inch Extended
Wide Bandwidth dome tweeter with a 4.5-inch midrange and four 4.5-inch woofers for
smooth, natural sound and dynamic bass. The M340's Lo-Q cabinet is built to reduce
vibrations and eliminate unwanted resonances, and an internal chamber isolates the
midrange from the woofers to prevent acoustic interference.
The Lo-Q cabinet reduces vibrations and eliminates unwanted resonances.View
Very high quality crossover networks featuring low loss film capacitors
and low distortion laminated silicon steel core inductors are utilized for greater
clarity and minimal coloration.
M340 Floorstanding loudspeaker
At a Glance.
1-inch EWB dome tweeter for greater clarity and less distortion
4 ½-inch midrange uses mass loading for smooth frequency response
Four 4 ½-inch woofers for optimal bass
Lo-Q cabinet reduces vibrations and eliminates unwanted resonances
Internal chamber for midrange to prevent acoustic interference
Five-year limited warranty
Clear, Natural Sound for Music, Movies, and More
The M340 Floorstanding Loudspeaker is equipped with Boston's signature 1-inch Extended
Wide Bandwidth (EWB) dome tweeter, which is designed to cover a broad range of frequencies,
reduce distortion, and improve clarity in the high registers. Unlike most tweeters,
the EWB has a small dimple in the middle and a large radiating surface that extends
from the center to the outside perimeter of the diaphragm. This design enables the
tweeter to track subtle treble details and reproduce the highest frequencies with
Smooth Bass Response
A 4.5-inch polypropylene midrange employs mass loading to dampen harmful resonances
and achieve a smoother frequency response at the top of the driver's range. The
M340 also features an array of four 4.5-inch polypropylene woofers that produce
multiple floor reflections that minimize sensitivity to placement and optimize bass
response. The woofers feature aluminum shorting rings for dramatically lower distortion
and a clearer sound.
Lo-Q Construction to Limit Vibrations
The M340 has a cabinet made of Lo-Q, a material consisting of two pieces of medium-density
fiberboard joined together with a thick layer of damping adhesive in the middle.
This material significantly reduces cabinet vibrations to virtually eliminate unwanted
resonances allowing the M340 to create a larger, more vivid soundstage.
An internal chamber acoustically isolates the midrange from the woofers to prevent
interference and serves as a reinforcing brace near the top of the cabinet to add
rigidity and reduce vibrations even further.
The cabinet also contains heavy-duty absorptive fill and internal braces that have
been carefully positioned to maximize the speaker's strength and optimize sound.
The M340's black gloss finish and curved side panels with faux leather wrap can
complement any decor.
Product and Warranty Information
This product measures 40.38 by 8.81 by 11.44 inches (H x W x D) and weighs 46.3
pounds. It is recommended for use with a 50- to 350-watt amplifier.
The M340 Floorstanding Loudspeaker is backed by a five-year limited warranty, subject to the full warranty terms and conditions.
What's in the Box
M340 Floorstanding Loudspeaker, speaker spikes, and owner's manual.
Lawrence Devoe , Blu-rayDefinition.com
"The M Series has been the beneficiary of BA’s long legacy and bears testimony to the fact that good things can come in small packages. After living with these little fellows for nearly two months, and enduring the tedious but essential break-in process, I was rewarded with surprisingly big sound belying their modest size."