Categories > Loudspeakers, Subwoofers & Soundbars

2013 Product of the Year Entrant

Sunfire HRSIW8

MSRP: $1700

Sunfire's all-new HRSIW8 is an in-wall dual-driver 8" subwoofer that features the brand's patented Stillbass® anti-shake technology that virtually eliminates mechanical vibration, improving bass definition while helping to contain the bass to the room in which it is mounted.  The Stillbass technology, coupled with Sunfire's trademark High Back-emf designed woofers, helps provide pounding audiophile-grade bass from a subwoofer that easily retrofits into a standard 16" on-center stud bay. The company combined their legacy technologies with the latest thinking in subwoofer power and control. The HRSIW8 is simple to install, and setup is straightforward using Sunfire's Digital amplifier platform, which includes a wide array of optional adjustments for maximum performance.

Learn more about HRSIW8.
Download product spec sheet.


The HRSIW8 is different from other subwoofers in many ways. For one, it offers high quality sound at a reasonable price. The HRSIW8 features two custom-designed 8" long-throw woofers using ultra low mass fiberglass cones in a sealed cabinet that measures 12.2"W x 24.7"H x 3.75"D, and only requires a wall cutout of 10.6"W x 23.5"H. With six built-in dog-toggle style wall clamps it is a perfect solution for both retrofits and new construction jobs, easily fitting in any standard 16" on-center stud bay. A wire channel is provided on the rear of the enclosure to avoid pinching the wire between the enclosure and the back of the drywall inside the opening.

The HRSIW8 is also equipped with easily removable magnetic grilles and a cutout template for easy installation.


The HRSIW8 provides users with a subwoofer that doesn't take up large amounts of space, and provides a sound that delivers a dynamic, accurate bass. With Sunfire's Digital amplifier platform, setup is straightforward, and the HRSIW8 features a frequency response of 33Hz-150Hz, maximum output of 106dB, balanced and unbalanced line level inputs, gold plated speaker terminals and adjustable high-pass and low pass filters.
Also, the HRSIW8's external rack-mount amplifier is an evolution of the Sunfire digital amplifier used in the company's SDS subwoofer line. Using Sunfire's Frequency Filtration Design (FFD) for high fidelity bass, the amp delivers 520W of power with near zero distortion. A wide range of filtering adjustments are included as well as DSP with room equalization and a remote control that provides one-touch access to preset equalizer modes.

Company Info


Founded by renowned audio innovator Bob Carver, Sunfire designs, develops, manufactures and markets the smallest, most powerful speakers, subwoofers and amplifiers in the world. Sold in over 65 countries, Sunfire combines unconventional thinking with precision engineering to create innovative audio products that deliver exceptional performance — whenever, and wherever, they are heard. Carver’s forty years of scientific research has resulted in numerous patents including the Tracking Downconverter™ power supply used in the company’s subwoofers and amplifiers; and High Pressure, High Back-emf technology found in the company’s loudspeakers. 

1800 South McDowell Blvd.
Petaluma, California
United States of America
Tel: 760-710-0993

Sunfire Products


The smallest, most powerful subwoofer in its class, the tiny Sunfire® Atmos™  delivers performance superior to many 10” to 12” woofers. The design incorporates dual custom designed 6.5” woofers in a sealed extruded aluminum enclosure that measures just over 8” tall.


Sunfire's HRSIW8 in-wall dual-driver 8" subwoofer features Stillbass® anti-shake technology that virtually eliminates mechanical vibration, improving bass definition while containing the bass to the room in which it is mounted.

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