Boston Acoustics M350 loudspeaker Specifications

Sidebar 1: Specifications

Description: Three-way, reflex-loaded, floorstanding loudspeaker. Drive-units: 1" (25mm) EWB-dome tweeter, 4.5" (114mm) mass-loaded polypropylene-cone midrange, four 5.25" (133mm) polypropylene-cone woofers. Crossover frequencies: 400Hz, 3kHz. Frequency response: 40Hz–30kHz, Ò3dB. Sensitivity: 89dB/2.83V/m. Impedance: 4 ohms nominal, 3.2 ohms minimum. Recommended amplifier power: 50–500W.
Dimensions: 42.375" (1076mm) H by 9.625" (245mm) W by 12.2" (310mm) D. Weight: 55.9 lbs (25.4kg) each.
Finish: High-gloss black and black leatherette.
Serial numbers of units reviewed: BGC000116 (both).
Price: $2498/pair. Approximate number of dealers: 50.
Manufacturer: Boston Acoustics, 7 Constitution Way, Woburn, MA 01801. Tel: (201) 762-6429, (508) 538-5000. Web:

Boston Acoustics
7 Constitution Way
Woburn, MA 01801
(201) 762-6429

James.Seeds's picture

You make it a point by saying "The M350 was designed in the US but is manufactured in China" it doesn't lesson the fact that it's still made in China to American specifications. 

It's a shame that something costing $2500.00 is being built in China and exported to the States, it's bad enough some of food like American Apple Pie comes from that poluted country but now speakers like Boston Acoustics as well, oh the humanity.

Coi Laman's picture

Mr. Atkinson, of course you are having a lot of problems with mid-bass and the congested lower midrange. These speakers are too big for your room. I struggle with the mid-bass of my PSB Image 4T and they are a lot smaller and only have two 5.25 inch drivers, where one of these drivers also takes care of the mid-range frequency duties (2.5-way design).

I can only imagine the problems with this speaker, having 4 dedicated bass drivers. The sound was probably a lot worse than what you made it seem. Big speakers always take all the life out of music in the average size rooms and there is nothing we can do about it.

Bobbersound's picture

Hello !!! This review almost made me not purchase these speakers !! Wow what a shame and mistake that would have been these gems sound beautiful !!!Clean clear and sound stage to die for !!! Its all their !!! Ive been an avid reader of Sterophile for many years and must say this i one of the first recommended components i could afford do to discontinued pricing and i love my music !!!!