
Dr Hsu's Craft: Engineering High-Fidelity Bass for 30+ Years
Built By Audiophiles, For Audiophiles
I'd always loved high quality deep bass, but couldn't find what I wanted, even in high-end speaker systems. Motivated to build my own subwoofers that even budget sound enthusiasts could enjoy, I built my first subwoofer while studying at MIT in the '80s. I care a lot about my craft and it's my mission to share the gift of breathtaking sound with all of you!
Dr. Hsu
P.S. This is one of the first subwoofers I made out of recycled cardboard. I called it the a sono-tube and it was seven feet tall :)






Dr. Hsu Explains Each Subwoofer
VTF15 MK2 Subwoofer Intro Video
VTF2 Subwoofer Intro Video
VTF3 Subwoofer Intro Video
ULS-15 Intro Video
The VTF-15H MK2 is our flagship and highest-performing subwoofer designed for the ultimate home theater experience. With its exceptional capabilities, the VTF-15H MK2 stands as the pinnacle of performance in the HSU lineup.
The VTF-2 MK5, the epitome of affordability and value in the renowned HSU lineup. This subwoofer is designed to cater to budget-conscious enthusiasts without compromising on quality or performance.
The new VTF-3 MK5 HP sets a new standard for high-end performance at an affordable price point. It’s earned its reputation as one of the best value ported 15" subwoofers on the market.
Introducing the ULS-15 MK2, the renowned musician's companion subwoofer that has garnered immense popularity in music recording studios and various other contexts.
What Experts & Our Customers Say
Alan Meyerson, score mixer for Top Gun, Dune, Dark Knight, Dunkirk, Avengers"There is no subwoofer that gives you the bang for the buck as HSU Research. Powerful, musical, easy to blend into a system. I have them in both of my studios and my clients love them too."
Colin JemmottBudget systems aren’t supposed to be able to attain this kind of dynamic range and still maintain their composure? They do now.
Reddit UserHSU is the most overlooked brand in-home theater. I doubt I will ever buy a sub from any other brand.
Home Theater ShackI'm willing to bet you've never heard a speaker this size sound this good... the results achieved are incredible. Great products, great company, great value. What else is there to say?
AudigonHSU subs are the bomb! If I am in the market for a sub, I am buying HSU again. Especially for the money, I don’t think any sub can touch it.
Widescreen ReviewThe company's reputation of
delivering subwoofers with the most "bang for the buck" is legendary in the world of Consumer Electronics.
Reddit UserThere is no subwoofer products that definitive technology makes that I would take over anything that HSU makes.
AudigonLove [HSU Subs]. Have one I'm listening to right now. :) GORGEOUS, big, powerful. Easy to set up.
BrettI have had numerous people from all walks of life over to EXPERIENCE the sound that my home theater is now capable of producing and I have heard time and time again from them that I HAVE NEVER HEARD ANYTHING LIKE THAT BEFORE.
Reddit UserWent from no sub to a Hsu MK5 VTF-3. I went from walking to work to riding a Lamborghini.
Home Theater ReviewThe HB-1 MK2's soundstage is stunning and better in my room than even my reference Bowers & Wilkins.
Audio BaconThe amount of value you’re getting cannot be understated. The HSU Research CCB-8s are dynamic monsters and image better than some much pricier speakers I’ve heard.
CustomerI am not sure why your bookshelves are so much more musical than many of the other speakers on the market today. And to think that some of these speakers are over 80 times the price of yours!
BrentThe VTF-15H delivered the most bang for the buck of any subwoofer on the market.
Guarantees






Most affordable with uncompromised sound
VTF-2 MK5 Subwoofer
- Regular price
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$689.00 - Regular price
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$689.00 - Sale price
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$689.00
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Full Description
Introducing the VTF-2 MK5, the epitome of affordability and value in the renowned HSU lineup. This subwoofer is designed to cater to budget-conscious enthusiasts without compromising on quality or performance.
- Most affordable and budget-friendly subwoofer
- One of the smallest subwoofers so it works well in tighter spaces, yet doesn’t compromise on quality
- Better performance below 20 Hz frequency than the ULS-15 MK2
- Plays lower in extension over the ULS-15 MK2
- Variable tuning provides more flexibility and allows customers to choose lower bass or higher output capabilities - it’s like having three subwoofers in one!












Customer favorite and best seller
VTF-3 MK5 HP Subwoofer
- Regular price
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$999.00 - Regular price
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$999.00 - Sale price
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$999.00
Full Description
The new VTF-3 MK5 HP sets a new standard for high-end performance at an affordable price point. It’s earned its reputation as one of the best value ported 15" subwoofers on the market.
- Customer favorite and best seller
- Smaller enclosure than the VTF-15H MK2 (4” less depth) and lighter, but nearly identical in performance for the majority of audio material
- Plays significantly louder and cleaner in the deeper bass over the ULS-15 MK2 for just a small increase in price.
- Output is equivalent to two VTF-2 MK5’s across the board at frequencies above 25 Hz
- Most inexpensive ported 15” subwoofer in our offerings (of 2)
- Identical performance to the VTF-15H MK2 from 25 Hz on up
- Considered one of the best value ported 15” subwoofers
- For those who are worried about the size, it’s been designed to remain shorter than typical sofas so it can double as an end-table.
- Offered in a smooth satin black painted finish












Popular for musicians and recording engineers, smallest size
ULS-15 MK2 Subwoofer
- Regular price
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$989.00 - Regular price
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$989.00 - Sale price
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$989.00
Share
Full Description
Introducing the ULS-15 MK2, the renowned musician's companion subwoofer that has garnered immense popularity in music recording studios and various other contexts.
- Well-known for being a musician’s companion subwoofer
- Most popular subwoofer for music and cinematic recording studios
- Smallest subwoofer in the HSU lineup
- At its price point, the ULS is the best performer of the industry’s sealed subwoofers
- Better performance from 25 Hz on up over the VTF-2 Mk5 (like having two VTF-2 Mk5’s put together when it comes to mid-bass slam/punch)
- Mid-bass performance is fairly similar to VTF-3 Mk5 HP and VTF-15H MK2
- Most affordable 15” HSU subwoofer
- Balanced XLR inputs to protect their signal from noise caused by RF interference, RMI, etc for common usage in high-end audio and professional audio (studio, live sound environments)
- Packs a lot of performance despite the smaller enclosure
- Smooth satin black painted finish or real-wood veneer rosenut finish
- Note: Magnetic Grille has been discontinued. New orders will receive peg grille.













Best performer, most output capability
VTF-15H MK2 Subwoofer
- Regular price
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$1,399.00 - Regular price
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$1,399.00 - Sale price
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$1,399.00
Share
Full Description
The VTF-15H MK2 is our flagship and highest-performing subwoofer designed for the ultimate home theater experience. With its exceptional capabilities, the VTF-15H MK2 stands as the pinnacle of performance in the HSU lineup.
- Most popular subwoofer for home theater
- Highest performing subwoofer that excels in output capability, especially in the deeper bass
- Larger enclosure than the VTF-3 MK5 HP, so more efficient in the deeper bass
- Larger ports at a lower tuning than the VTF-3 MK5 HP, so it not only plays louder and cleaner with sub 20 Hz bass (less port noise), but also plays lower
- Plays significantly louder and cleaner than the VTF-2 MK5 across the board (like having two of the VTF-2 MK5’s put together) without distortion.
- Plays significantly louder and cleaner than the ULS-15 MK2 in the deeper bass (like having two ULS-15 MK2’s put together) without distortion.
- Balanced XLR inputs to protect their signal from noise caused by RF interference, RMI, etc for common usage in high-end audio and professional audio (studio, live sound environments)
- Offered in a smooth satin black painted finish or a real-wood veneer rosenut finish
- For those who are worried about the size, it’s been designed to remain shorter than typical sofas so it can double as an end-table.







Subwoofer Comparison Chart
We hope this comparison guide can help you choose between our subs. For more support, you can: