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Definitive Technology StudioMonitor 350 Bookshelf/Stand Mount Speaker (Black) Pair

  • 26 Hz - 30 kHz
  • 8 Ohms 20 - 200 watts
  • 90dB
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Definitive's StudioMonitor 350 is a compact high-performance, magnetically shielded full-range bookshelf speaker. But don’t let its small size fool you—thanks to its 8 inch pressure-coupled Low Bass radiator it belts out the bass depth and punch of a floor-standing loudspeaker. Its non-resonant monocoque cabinets feature Definitive's elegant piano-gloss black lacquer end cap/wraparound grille cloth styling.

The StudioMonitor 350's sonic performance is truly stunning, producing huge razor-sharp, three-dimensional sonic images combined with incredible detail, ruler-flat frequency response and rich, full bass. Because the StudioMonitors are true full-range speakers with extended low-frequency response they deliver superb performance both as stand-alone speakers and when combined with separate subwoofers.

  • newegg Monocoque, Non-Resonant, Low-Diffraction Cabinet The cabinet of a loudspeaker plays a large part in its sonic performance. Diffraction, or the secondary radiation of sound caused by cabinet edges, grille frames and other protrusions, can color the sound of a loudspeaker. The design of the StudioMonitors reduces diffraction to an absolute minimum by flush mounting drivers on extremely narrow baffles with radial edges, which are covered by a frameless grille "sock." In addition, the resonant vibration of a loudspeaker's cabinet walls and baffles can also impart unwanted coloration. The Definitives' monocoque cabinets are constructed of high-density medite with 1" thick front and rear baffles, foam damping pads and internal braces. This virtually eliminates resonant cabinet coloration which could otherwise interfere with the pure sound produced by the high definition drivers.
  • newegg High-Definition Cast-Magnesium Basket Drivers The StudioMonitor 350 utilizes a 5-1/4 inch high definition cast basket bass/midrange driver for significant performance advantages in the areas of bass reproduction, lifelike midrange clarity and dynamic range. This sophisticated bass/midrange driver incorporates deeply drawn mineral-filled polymer cone, combined with butyl rubber surround and dust-cap, high temperature vented voice coils and massive magnet structures. This combination of features assures high definition, superb transient response, high efficiency, high power handling and extended bass response. In addition, they are assembled utilizing an aerodynamically designed, magnetically inert, cast-magnesium basket to minimize internal reflections off the back of the cone and preserve structural and magnetic integrity under all conditions.
  • newegg Moving Coil Pure Aluminum Dome Tweeters The moving coil dome tweeters Definitive developed for the BP7000 Series are used in the StudioMonitor 350. They utilize a specially annealed pure aluminum 1-inch dome, suspended by a silk surround and acoustically loaded by a precisely configured phase plug/lens, engineered to assure perfectly controlled, absolutely linear movement. This results in velvety smooth extended response (beyond 30 kHz), greatly reduced distortion, improved transient response, wider dispersion and notably higher definition. Magnetic fluid damping is incorporated for ultra high power handling.
  • newegg Phase-Coherent Linkwitz-Riley Crossover Networks The crossover network of a loudspeaker is the real heart of the system, as it is responsible for perfectly blending together the sound of the various drivers into a musically seamless whole. The sophisticated Linkwitz-Riley design used in the SM350 equalizes the drivers for linear phase and frequency response. This preserves the phase coherence, transient response and dynamic integrity of the signal for absolutely lifelike music and home theater reproduction in your home.

Learn more about the Definitive Technology StudioMonitor 350


Definitive Technology
StudioMonitor 350


Bookshelf Speakers
Sold As
Driver Units
1 - 5-1/4" bass/midrange driver
1 - 1" dome tweeter
1 - 8" bass radiator
Power Rating
Recommended Associated Amplifier Power: 20 - 200 watts
Frequency Response
26 Hz - 30 kHz
Nominal Impedance
8 Ohms
90 dB
Inputs: One pair of 5 way binding posts
Remote Control
Dimensions & Weight
Dimensions (H x W x D): 10.7" x 6.9" x 9.7" (27.1cm x 17.6cm x 24.6cm)

Weight: 14 lbs. (6.4 kg)


High-Definition 5-1/4 inch bass/midrange driver with cast Magnesium basket

Annealed Pure Aluminum 1 inch dome tweeter

Pressure coupled 8 inch Low Bass radiator for outstanding bass response

High gloss black lacquer end caps

Quick Info


  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years

Customer Reviews of the Definitive Technology StudioMonitor 350

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  • Timothy P.
  • 8/17/2014 10:18:42 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat Deal

Pros: Got these for $138.00, These sound very efficient. using for my front home theater system. More speaker than is needed but sound high end over anything in this price range.

Cons: Bigger than you think if you don't see them in-person first. You have to screw in the wall hanging brackets. There is no picture instruction to screw these in, just text on how to do it so make sure you understand the instruction.

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  • Christopher R.
  • 8/4/2014 1:24:06 AM
  • Tech Level: Average
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsAbsolutely Amazing

Pros: Very clear and great imaging. Using these with a home recording studio and very impressed with these. They will reveal an "air" that no other monitors in this price range can. Makes final mixes a breeze.

Cons: None. You can't beat the accuracy of these for the price point.

Other Thoughts: These things are amazing. I was kinda confused with the instructions said to 'break them in for 40 hours,' but they just only get better. Using them for final mixes of a home studio and they reveal what is missing in other project studio monitors. Would put these up against any JBL or Yamaha monitors and even bet money.

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  • Michael R.
  • 7/25/2014 7:54:02 PM
  • Tech Level: High
  • Ownership: more than 1 year

5 out of 5 eggsSound Great for their Size

Pros: I recommended these to my sister almost 2 years ago because she wanted inexpensive bookshelf speakers but also wanted a decent home theater system. Me, being an audiophile, wanted to find something Equivalent to the JBL S38s (which are no longer made). I recommended the Onkyo 727 that was also on sale at the time and she picked those up with a 5.25"x2 Center and 12" JBL Sub.

I calibrated the system using Onkyo’s advanced calibration feature, then tweaked it a bit. I can see why some people think they are too bright, but what’s nice is that properly calibrated, you can fix this while they break in (I simply upped the powered Sub output, and pulled forward the center channel), and after about a year they settle down into a nicer/flatter response (as measured with my spectrum analyzer this year). The room she is using them in is a sunken living room about 13'x16' with a large opening to the kitchen above.

I plan to buy at least a few pairs of these for myself if they go on sale for less than $200, and I have the spare cash handy. Overall, on sale for less than $200 these are a steal. They far exceeded my expectations for the price. My JBLs were a lot more and these come closer than one would expect to sounding as good as those. I can’t use a full 12" or 15" sub where I am right now, so these will be perfect.

Cons: Some might think the Bass is lacking. It is not over-emphasized as it is with a lot of hop hop and pop these days. You can fix this, by adjusting the EQ or placing the side firing woofer close to a corner to emphasize bass, or buy a sub.

These speakers seem to need a lot of hours on them before the crisp highs mellow out.

Other Thoughts: I put my speakers on rotating turntables (lazy susans)—which are about $20 at any tap plastics— with mouse pads underneath (to decouple them from the surface they are on) so I can reposition them quickly depending on what I am listening to — so I can widen or narrow the sound field quickly. If you notice bass that increases and decreases in the same room as you move around — then you have standing waves, so angle your speakers.

If you are worried about the side-firing woofer being over-emphasized, simply angle the speaker so that the sides aren’t parallel to the wall - and further out, and you will be rid of standing waves which muck with the system’s accuracy. Hard parallel walls for sounds to bounce off of are the enemy to good consistent sound quality, so make the waves bounce off walls at an angle. (I’m a trained audio engineer which is how I know this — which is something some self-taught audio engineers do not know.)

4 out of 4 people found this review helpful. Did you? Yes No

  • 7/11/2014 7:38:20 AM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsNice!

Pros: Great imageing and well defined sound

Cons: None yet

Other Thoughts: Nice neutral sound with well defined midrange. Image very very well. Sound best with high quality, high output amps.

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  • Roberto R.
  • 6/12/2014 5:55:49 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsDef Tech's 350

Pros: Impressive!

Cons: Nothing bad to say. They're Great!

Other Thoughts: I am impressed with the sound these put out. Glad I bought them.

0 out of 1 people found this review helpful. Did you? Yes No

  • Mark A.
  • 6/11/2014 6:22:12 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsNot So Good

Pros: Deep bass.

Cons: The tweeters are on the shrilling side and the mid range is really weak. High listening fatigue.

Other Thoughts: I really wanted to like these speakers, but after using them for about 6 months I decided to box them up and put them in storage. I recently gave them another try and the sound is just too piercing, especially at higher volumes. They are okay for movie surround sound, but for music they are very harsh and are tiresome to the ear. I don't understand how they continually get very high reviews. These people must use them mainly for movies. I would not pay more than $200 for these, and there are much better sounding speakers for less money out there.

3 out of 3 people found this review helpful. Did you? Yes No

  • Steven L.
  • 3/30/2014 7:27:57 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAwesomeness is a small package

Pros: Incredible sound for the small size.
Can handle more power than I need it to.
5 way binding posts are awesome.
Great soundstage projection.

Cons: Bass might be weak for some people, but it's good enough for me.

Other Thoughts: There really isn't anything I thought was particularly bad about these speakers. Sure the bass isn't that punchy, but I'm finding that I like the well defined bass over the boomy and muddy bass I got from my old Bose 4001 series speakers. Mids are also much clearer.

For music it's great as is, but maybe for movies, an added subwoofer would be better.

I thought the mesh all around the cabinet was an interesting aesthetic choice. Might be good or bad depending on your personal tastes.

I found these better with the speakers pointing towards me than letting them diffuse sound throughout my room.

2 out of 3 people found this review helpful. Did you? Yes No

  • Chris P.
  • 2/22/2014 11:35:39 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsSmokin' monitors

Pros: Very nice imaging. Huge soundstage. Cover the lower octaves as well as one can expect from a monitor this size. Better than anything near this price point. If you want better performance (other than the SM450) expect to pay $2000+. Handle tremendous amounts of power. I pushed a Crown Power Base 2 into clipping and the SM350's handled all 460 wpc without issues. I don't recommend this as any damage will not be covered under warranty. I was using a compressor to make sure that peaks didn't occur. Don't judge them until they have had at least 40 hours of break in. Great speakers. They had an unbelievable sale on them so I bought 5 pairs.

Cons: They sound thin before they're broken in. Bass extension is not up to the specs. It gets better as they approach 100 hours of use. Significantly.

Other Thoughts: Wait for a sale. They're worth full price but I bought 5 pairs at $179 from Newegg. They arrived in less than 24 hours.

1 out of 1 people found this review helpful. Did you? Yes No

  • Allan M.
  • 2/20/2014 7:34:38 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

5 out of 5 eggsAwesom

Pros: Small, looks good, Sounds great.

Cons: none

Other Thoughts: I have NHT SuperZeros and Polk Monitor 30 II's. The Def Techs sound WAY better than either. I use them on my desk with an old Sony ES receiver. Sound stage is way better defined with the DefTechs. I paid one eighty with a fifty rebate, so awesome price.

1 out of 1 people found this review helpful. Did you? Yes No

  • Dustin L.
  • 2/19/2014 8:18:07 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsAmazing

Pros: Great set of bookshelf speakers for the rear or even for the front. I have these hooked up to my laptop which is connect via DAC to my receiver. There is a 20-40 hour break in period, but even then they sound amazing right out of the box. They are very clear, high's are crisp and not overpowering and just the right amount of bass.

Cons: None at the moment.

Other Thoughts: Easy to mount on to the wall, they actually come with two brackets and screws if you want to mount them to your wall! A huge plus!

1 out of 1 people found this review helpful. Did you? Yes No

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