Subwoofer

Dr. Hsu is back with his ultimate breakthrough creation—a seriously powerful dual 15” subwoofer that turns from sealed to ported with the addition of a supercharger (SC). It's the world's first ever supercharged dual 15" ported subwoofer. 1200W RMS drives dual 15” side-firing woofers for unmatched power Modular design – Upgrade the standalone sealed D15-Chimera to a ported sub by adding the Supercharger (SC) Easier to handle – this two-piece system is the only super powerful subwoofer on the market that is simple to install and move. This is especially useful for basement or 2nd-floor installations. Beast Mode performance – 3-port option delivers ultra-deep bass with less port noise than dual TN1s, while matching their performance in 2- and 4-port modes. Customizable port direction – Choose forward-facing ports for a bold look, or rear-facing to fire toward the wall and keep them hidden. We personally love facing the ports into the room - we think it looks cool! High-performance specs – dual 15” side-firing woofers and 1200W RMS power Features balanced XLR, unbalanced RCA and high level inputs for greater flexibility. Balanced XLR inputs protect against noise caused by RF interference, RMI, etc., for usage in high-end audio and professional audio (studio, live sound environments). Furniture-grade smooth satin black painted finish. Unlike vinyl, used by many of our competitors. 7 years woofer warranty and 5 year electronics warranty. Want to know the history? Years ago, Dr. Hsu introduced the turbocharger for the VTF-3. It was a unique concept that allowed the VTF-3 in max extension mode to have both ports open, allowing high output ultra-low bass with minimal port noise. Fast forward to 2025, and mad scientist Dr. Hsu has now made the supercharger convert a sealed to a ported sub. Note: While the D15-Chimera is its own standalone sealed dual 15" sub that will be sold as its own separate sub ($1799) and the supercharger can be purchased separately for $499.

Dr. Hsu is back with his ultimate breakthrough creation—a seriously powerful dual 15” subwoofer that turns from sealed to ported with the addition of a supercharger (SC). It's the world's first ever supercharged dual 15" ported subwoofer. 1200W RMS drives dual 15” side-firing woofers for unmatched power Modular design – Upgrade the standalone sealed D15-Chimera to a ported sub by adding the Supercharger (SC) Easier to handle – this two-piece system is the only super powerful subwoofer on the market that is simple to install and move. This is especially useful for basement or 2nd-floor installations. Beast Mode performance – 3-port option delivers ultra-deep bass with less port noise than dual TN1s, while matching their performance in 2- and 4-port modes. Customizable port direction – Choose forward-facing ports for a bold look, or rear-facing to fire toward the wall and keep them hidden. We personally love facing the ports into the room - we think it looks cool! High-performance specs – dual 15” side-firing woofers and 1200W RMS power Features balanced XLR, unbalanced RCA and high level inputs for greater flexibility. Balanced XLR inputs protect against noise caused by RF interference, RMI, etc., for usage in high-end audio and professional audio (studio, live sound environments). Furniture-grade smooth satin black painted finish. Unlike vinyl, used by many of our competitors. 7 years woofer warranty and 5 year electronics warranty. Want to know the history? Years ago, Dr. Hsu introduced the turbocharger for the VTF-3. It was a unique concept that allowed the VTF-3 in max extension mode to have both ports open, allowing high output ultra-low bass with minimal port noise. Fast forward to 2025, and mad scientist Dr. Hsu has now made the supercharger convert a sealed to a ported sub. Note: While the D15-Chimera is its own standalone sealed dual 15" sub that will be sold as its own separate sub ($1799) and the supercharger can be purchased separately for $499.

Introducing the ULS-15 MK2 sealed subwoofer, the renowned musician's companion subwoofer that has garnered immense popularity in music recording studios and various other contexts. Our most affordable 15" sealed subwoofer. 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 Note: Magnetic Grille has been discontinued. New orders will receive peg grille.

Introducing the VTF-2 MK5, the epitome of affordability and value in the renowned HSU lineup that works for all budgets, but doesn't skimp on performance. 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! Best value 12 inch subwoofer

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 15" subwoofer with amazing port performance 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 a best value subwoofer for home theaters. 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

Status: 09/28 - The next batch of VTF-TN1 subwoofers are now in stock. Note that we may have to spread shipment across multiple days depending on how many orders are received. We ship out in order of when it was placed. The new VTF-TN1 is our highest-performing subwoofer, designed for the ultimate home theater experience. With its exceptional capabilities, the VTF-TN1 stands as the pinnacle of performance in the HSU lineup. Highest performing subwoofer that excels in output capability, especially in the deeper bass. Classic variable tuning frequency (VTF) with dual 4” down-firing ports - hidden from the dogs, cats, and toddlers. Perfect height acoustically, to use as a speaker stand. Features balanced XLR, unbalanced RCA and high level inputs for greater flexibility. Balanced XLR inputs protect against noise caused by RF interference, RMI, etc for usage in high-end audio and professional audio (studio, live sound environments). Compared to other HSU subs: 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) with low distortion. Plays significantly louder and cleaner than the ULS-15 MK2 in the deeper bass (like having two ULS-15 MK2’s put together) with low distortion. Among the smallest footprint - similar to the ULS-15 MK2. Replaces our previous flagship VTF-15H MK2: Tuned to go even lower, with a flatter frequency response. Less port noise and compression. More affordable price. Smaller footprint: won't fill up your living room, and more placement options for optimal sound. Same internal volume. Can also be laid on its side if preferred. Less deep than most sofas, makes a good end-table. Best affordable home theater subwoofer and best 15 inch subwoofer on the market today. Furniture-grade smooth satin black painted finish. Unlike vinyl, used by many of our competitors. 7 years woofer warranty and 5 year electronics warranty.

VTF-TN1 Subwoofer has been fully tested and is working according to specification and has full warranty.

The Indiana Line Basso 840 model is a modern active subwoofer. The integrated class AB amplifier with a maximum power of 125 W drives a 275 mm woofer. The frequency response of this subwoofer is between 24 and 180 Hz. The efficient bass reflex cabinet and the functionality of the subwoofer are also noteworthy. The amplifier module is equipped with a cut-off and gain frequency control as well as a phase switch, which allows you to adjust the signal processing parameters to the user's needs. This active subwoofer is perfect for both stereo and home theater systems.

The Indiana Line Basso 880 is the larger of the active subwoofers available in the Basso series. It has a sealed cabinet and amazing acoustic capabilities. It is equipped with a class D amplifier that delivers up to 400 W of power. The Indiana Line Basso 880 model uses an electroacoustic transducer with a diameter of 275 mm, which points downwards, so that the floor also supports bass reproduction. The loudspeaker will be perfect wherever it is necessary to enrich the sound in the low frequency range. It is suitable for both hi-fi stereo systems and home theater systems.