Main Content
Magnolia Collection

Definitive Technology - ProSub 800 8" 300-Watt Powered Subwoofer - Black

Not On Display at Sterling

On Display at Reston

Magnolia Home Theater

Take your home entertainment experiences even further. Magnolia Home Theater stores offer the next level of audio, video and smart home solutions.

Magnolia Home Theater
Learn more about Magnolia Premium Installation Transform your living room into an immersive listening environment with this immensely powerful 8" subwoofer. 300 watts of power and a frequency response of 20-150Hz ensure that movies and music come out sounding deep, rich and impressive.
Protection Plan Options
Build A Bundle

Item Added.View List

Add to List

    No lists found. Create one today.
    Add Item
    Our experts recommend


    Ratings & Reviews

    Overall Customer Rating:
    95% of customers would recommend this product to a friend (224 out of 236)


    8" high-definition woofer with polymer cone

    Coupled to an 8" infrasonic radiator to deliver authoritative, high-definition bass for high-impact home theater audio.

    Built-in amplifier

    Supplies 300 watts of RMS power for crushing volume with minimal distortion. Convenient, signal-sensing auto on/off feature.

    Computer Synthesized Transmission Line Tuning

    For extended response and improved pitch definition.

    Electronic low-pass and high-pass crossover

    At 24dB and 6dB for a combination of musicality and power.

    Accurate, high-impact bass performance

    With superior transient response, low distortion, stupendous subsonic power and high output capability.

    Low-level LFE inputs

    Combine with left and right channel inputs for maximum flexibility and performance. 5-way binding post.

    Monocoque cabinets

    Designed to be totally inert and vibration-free ensuring pure sonic reproduction.

    Versatile installation options

    Subwoofer is tuned for optimum performance in any room.

    20Hz - 150Hz frequency response

    For faithful sound reproduction.

    Customer rating

    Rating 4.6 out of 5 stars with 236 reviews

    would recommend to a friend

    Expert rating

    Rating 4.5 out of 5 stars with 2 reviews



    • Rating: 5 out of 5 stars

      Sounds Great and Excellent Service

      • Verified PurchaserVerified Purchase
      • My Best Buy® Elite MemberElite Member

      A note about a recent experience with Definitive. I purchased components for a 5.1 system from Best Buy a little under 3 years ago. I chose Definitive speakers because I liked the sounds compared with other brands I listened to. The pricing didn't hurt but was not my primary rationale. Since we all hear things differently I wanted speakers that sounded good to me, not based on the reviews of extreme, snobbish audiophiles. Because of the size of the room where I intended to use the system I bought the ProSub 800 for the subwoofer. All of the speakers I purchased have worked well and sound good to my ears, which again, is all that matters to me. The speakers also look nice. The reason for this review is that the ProSub 800 suddenly died last week. No sounds were being emitted. I called Definitive support to see what I could do. I spoke with a very courteous gentleman in Baltimore and in clear English I was able to discuss the issue. He asked a couple of questions and told me he knew the cause of the problem - the amp was dead. After ascertaining the version, as there has been a revision of the subwoofer since I bought mine, he asked for my address and stated he would send me a replacement amp and email me instructions to make the switch. I did not have to request a thing, no third degree, no demand for a receipt, no "I need to speak with my supervisor", not even a question about where I bought the speaker. To say that my expectations were met is untrue. I was expecting an offshore call center to tell me that it would cost more to fix the sub than to buy a new one. Massively exceeding my expectations is an understatement. That was last Monday at almost 5 PM in Baltimore, by Thursday the new amp was at my door. The switch was simple and now the subwoofer works and sounds great again. This review was the only way I could think of to thank Definitive for their excellent service. I will be buying from them again and encourage others to look at their products. Great job Definitive.

      I would recommend this to a friend

    • Rating: 5 out of 5 stars

      Great Sub at a Great Price

      • My Best Buy Premier Silver MemberElite Plus Member

      This sub is being used in a small bedroom 5.1 audio setup, and I feel that this is important for those of you reading this review. The sub itself is smaller than most and yet has many high end features to it such as the LFE out and gain dial options on the back. There's a volume dial on the side that's also nice for quick and easy adjustability, and there's always the AV receiver that can handle power output adjustments to the sub for extra fine tuning as well. Bass will add so much to the dynamics of your TV shows, movies and or gaming experience if you're not already used to having it. The Pro 800 has more than enough power to rattle all of my shot glasses off of the wall and then some. There are always other brands out there to look at, and for many out there, $400 for a subwoofer may be at the extreme end of your budget. I suggest however that you give it a try as this little guy really can deliver when it comes to sound output. Again, if you're not used to hearing much bass in your every day audio/video entertainment, then be prepared to be blown away. I've had this sub since about April of 2010, and have had zero issues with the unit at all. I have a feeling that if you purchase one of these subs that you're going to quickly fall in love with it. Definitive Technology produces some very nice quality products, and I for one am a big fan of their speakers. As for subs in this price range, I really don't think that the Pro 800 can be beat. They're very durable and should offer up many many years of satisfaction in your home.

      I would recommend this to a friend

    • Rating: 5 out of 5 stars

      Love it


      The sub to my computer 7.1 system blew out and I needed to replace it. Having now been through two of these type subs, I decided it was time for a change, so I wanted to go with one desgned for a home theatre system rather than a computer. I looked online at my local Best Buy and the subs I wanted to look at were listed as not available, or like this one, "coming soon". I decided to take the ride and look anyway. I had a price limit, so I kept to that and asked the sales person to demonstrate those in that area. I didn't like the sound of any of them. I saw this one sitting on a shelf without any price or label on it. I asked if he could direct sound to it and it sounded the best. I asked how much it was and if he had any in stock. I was expecting a no answer, but he disappeared and came back with one on a two wheeler. It was in my price range, sounded good, and I also have a Def Tech sub for my living room home theatre which has provided good service for a few years, so I purchased it. Can't be happier with the sound, but I will tell you all that in the directions it states to turn the sub sound (gain) up to 12:00. I did that and I have to tell you that it is way too much and you could run the risk of damage. I would suggest only raising the gain to 25% and increasing it from there if needed. I have put it through several tests, listening to music, watching Live Free Or Die Hard using 5.1 DTS, and I have to tell you it has passed with flying colors.

      I would recommend this to a friend

    • Rating: 5 out of 5 stars

      Can Anybody Compete at this price point?


      So I started with a $150.00 subwoofer (private label through Circuit city). It was rated a 4.8 out of 5 so I gave it shot. Everbody said "great sub for the money". Well it was just that, it was extremely muddy sounding. Then I went to a Klipsh Synergy 10" for $280. Again great reviews, plus it was $120 off the $399 retail. Much clearer in sound, great power and fills the room BUT the sub had terrible definition for bass guitar. Sooo I finally just stepped it up and spent the extra buck to go to the Definitive Tech ProSub 800. WOW what a difference! Not only did the bass rolloff like a waterfall but the definition was perfection. The funniest thing is that this has to be the SMALLEST, MOST, POWERFUL sub on the market. Everything I saw was obnoxious in size...this thing is so small! So if you aren't able to hide your sub behind anything, this unit can easily be out in the open and not be a distraction. My sub is paired up with(2) ProMontior 800 front speakers and Yamaha V663 receiver. I also had (2) existing in-wall Jamo speakers for surround. All together the system sounds phenomonal for its all so small and clean looking. I have an open concept space (vaulted ceiling and loft). Combo great room and dining room is about 525 sq. ft and the sound radiants thougout the space. I would highly recommend this sub for $399, personally I think they could get away with $499 since it offers premium bass definition in such a industry leading small size.

      I would recommend this to a friend

    • Rating: 5 out of 5 stars

      Simply amazing.. Strong. Clean.

      • My Best Buy Premier Silver MemberElite Plus Member

      This subwoofer is blowing my mind. I have had the mainstream subs, like Pioneer, JBL and Klipsch. They don't TOUCH this unit. It is way more power than I can use, I keep the side volume control about half way most of the time. The low frequencies are so even and solid, good sound quality. Matching it to a 3 piece set of Monitor Audio Bronze edition speakers at 80W each. The subwoofer is equally matching the front stage's sound quality. I have been auditioning the sub in stereo mode with just the 2 front speakers, and I have never heard my CD's sound this good. Do yourself a favor, and at least check this sub out before you go buy a mainstream brand. For this price compared to the others pricing, there is simply no reason whatsoever to not get this one. I run the receiver crossover around 80Hz, but the subwoofer also has its own crossover and volume for fine tuning. I didnt know a sub could sound THIS good.

      I would recommend this to a friend

    • Rating: 5 out of 5 stars

      Pleasantly surprised!

      • My Best Buy® MemberMember
      • Top 1000 ContributorTop 1000 Contributor

      With new SM350s, my old Velodyne CHT-10 was showing its limitations -- a lot of bass but not very clear. All other speakers in my living room are Def Techs, and they are great, so I wanted to go with Def Tech for the sub as well. After a few auditions in Magnolia, was assuming I'd go with a SuperCube III, but wondered if that would be overkill in my small living room, and at a hefty price -- decided to give the ProSub 800 a try at home, assuming that I'd return it and get the Supercube -- but to my surprise, the 800 blends very well with the 350s, sounds very natural. I don't care that much about rattling the walls and feeling like a tank is going through my house with movies, just wanted to hear good, crisp lows in music and realistic sound effects in movies. This sub does the job, and at a fair price. I'm very happy that I gave this sub a try!

      I would recommend this to a friend

    • Rating: 5 out of 5 stars

      Small size, big bass! You wont be disappointed!

      • My Best Buy Premier Silver MemberElite Plus Member
      • Top 500 ContributorTop 500 Contributor

      I have this little guy paired up with my pro800 fronts, pro600 surrounds, and procenter1000, running through a Pioneer AVR, and the bass is thundering! These subs are so small and easy to hide, but dont let size fool you, they generate massive power! Just watch a battle scene from Gladiator, or LOTR for instance and you will feel it reverberate through your chest! They work best if you run your front speakers through the back and then through the receiver, which may be a little extra wiring but well worth the hassle in IMO. They look very nice as well. Crossover works perfectly and auto on and off makes it easy and works flawlessly unlike some other brands i have had before. Get one if you can!

      I would recommend this to a friend

    • Rating: 2 out of 5 stars

      Nice, but...

      • Verified PurchaserVerified Purchase
      • My Best Buy® Elite MemberElite Member

      This is a decent sub for low volume movies and music, unfortunately, due to it's small size, it distorts at higher volume. A larger speaker with a bigger amp is really needed to give you that boom you desire for your music at higher volumes. I primarily used this speaker for music and it just did not cut it. It was surprisingly clear at low volumes but again, turning it up a notch, and it distorted considerably. I own a pair of Definitive Technology Studio 55 speakers, and they are by far the best speakers I have heard in a long time. I initially purchased this sub to pair it with these speakers. I exchanged this sub for a larger 12 inch sub from a different manufacturer and am satisfied with the sound I got out of the bigger speaker.

      No, I would not recommend this to a friend

    What experts are saying

    Rating: 4.5 out of 5 stars with 2 reviews

    Click to visit alaTest website
    The analysis of all aggregated expert reviews shows that the reviewers are positive about design, usability, size and price. Editors have mixed opinions about reliability. Using an algorithm based on product age, reviewers ratings history, popularity, product category expertise and other factors, this product gets an alaTest Expert Rating of 75/100 = Good quality.
    • Home Theater ReviewRating, 5 out of on April 21, 2010
      Definitive Technology ProSub 800 Powered Subwoofer Reviewed
      The ProSub 800 "takes up very little space and feels like it costs much more." On movies and games, this model "added a lot of punch and thump to smaller speaker setups." It features an "impressive package of features and performance for its veryFull Review
    • CNETRating, 3.9 out of 5Steve Guttenberg on July 21, 2008
      Definitive Technology ProSub 800 review: Definitive Technology ProSub 800
      Definitive Technology ProSub 800Full Review

    Product images, including color, may differ from actual product appearance.