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Tested in 2 channel only, No Remote, retail $3400SpecificationsFrequency response: 20Hz to 20kHzTotal harmonic distortion: 0.03%Input sensitivity: 1.6mV (MM), 125mV (line)Signal to noise ratio: 97dB (line)Digital inputs: coaxial, opticalVideo Connections: component, composite, S-videoDimensions: 17 x 5.75 x 16.5 inchesWeight: 22lbsAccessories: remote controlYear: 2004
Sunfire’s Theater Grand IV sits in the sweet spot of a respected early-2000s digital pre/pro: not flashy, but a serious control center for a surround system. At US$275, this is a strong bargain versus your comparable-listing benchmark: it’s well below the US$556 25th percentile and far under the US$824 median, with plenty of room before the US$1,205 75th percentile.
What makes it interesting is the value proposition: these units were built for flexible home-theater integration and can still make a capable hub for someone who needs a clean processor rather than a modern all-in-one. At this price, the upside is real if it powers up properly, all inputs/outputs work, and the remote or required accessories are included. The main buyer checks are practical rather than alarming: confirm firmware/functionality, test every channel and switching path, and make sure there are no dead display or control issues before jumping in.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Sunfire was founded in 1972 by legendary audio engineer Bob Carver in the United States. The brand emerged from Carver's unconventional approach to amplifier design, beginning with a graduate-school assignment to simulate earthquakes—a project that sparked decades of innovation in home audio. Headquartered in Petaluma, California, Sunfire is now part of Core Brands, a division of Nortek Technology Solutions that consolidates ten prominent audio and control brands under unified marketing and product development.
The brand has built its reputation primarily around subwoofers and power amplifiers. Sunfire pioneered the concept of true subwoofers in the early 1990s—compact, sealed designs with dramatically increased driver excursion that deliver powerful bass from remarkably small enclosures. The company's signature Tracking Downconverter power supply technology enables high efficiency and low distortion by dynamically matching output to instantaneous demand. Beyond subwoofers, Sunfire manufactures surround-sound processors, in-wall speakers, satellite loudspeaker systems, and premium home theater electronics.
Sunfire occupies the high-end segment of the consumer audio market, positioned for serious audiophiles and home theater enthusiasts willing to invest in performance. The brand's innovations—particularly compact, high-output subwoofers and efficient amplifier designs—have influenced industry standards and remain respected among discerning listeners. While not a household name like some mass-market brands, Sunfire maintains strong credibility within the audiophile community for uncompromising engineering and sonic performance.
See all Sunfire Audio listings on RADAR.
