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Kenwood KAC-9104D - Car Amplifier - Good
Why This One
Good condition — clearly used, with scratches and dents from normal use
1Ω-stable Class D mono amp with up to 900W RMS output.
Discontinued model — high-spec Kenwood performance at a used price.
Condition: Good
This Kenwood KAC-9104D is a good-condition item. This unit has not been functionally tested by our team. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.
What's Included
Kenwood KAC-9104D
No additional accessories included
About This Model
The Kenwood KAC-9104D is a discontinued Class D monaural power amplifier built for serious car audio installations. It delivers 500W RMS into 4Ω and 900W RMS into 2Ω or 1Ω, with a peak rating of 1800W, and is stable at 1Ω loads — making it well suited to demanding subwoofer applications. Inputs include a gold-plated RCA line input with speaker-level input also supported, while onboard processing covers a 50–200Hz low-pass filter (24dB/oct), a 15/25Hz infrasonic filter, and a 40Hz bass boost of up to +18dB. Thermal management is handled by a built-in cooling fan and a die-cast aluminium heat sink. Additional features include a phase inverter (0°/180°), signal-sensing turn-on, dual mono drive capability, and blue illumination.
A great opportunity to own a Kenwood KAC-9104D at this price point.
Open with a brief observation: The Kenwood KAC-9104D is a well-regarded, discontinued Class D mono subwoofer amp known for punching hard in a compact, rugged chassis. At US$112, this asking price is a strong deal—well below the typical used range of US$150–US$200 and significantly under the US$170 benchmark cited in recent reviews, placing it near the 25th percentile of used market values. This is a genuine bargain for a reliable, high-performance unit.
What makes this worthwhile: The KAC-9104D delivers 900 watts RMS at 2 ohms (500 watts at 4 ohms), features a built-in cooling fan, variable low-pass filter, bass boost, and speaker-level input, all in a chassis 30% smaller than prior models. It’s CEA-2006 compliant and 1-ohm stable, making it ideal for demanding sub setups. At this price, it’s a buying opportunity for enthusiasts seeking power and compactness without paying premium refurbished prices, especially if the listing includes original accessories or is from an original owner.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Kenwood traces its origins to December 21, 1946, when it was founded as Kasuga Radio Co. Ltd. in Komagane City, Nagano Prefecture, Japan, by a group of entrepreneurs led by William "Bill" Kasuga. Emerging in the postwar era, the company initially produced electronic components and amateur radio gear, renaming to Trio Corporation in 1960 before adopting the Kenwood name in 1986 to appeal to Western markets—blending "Ken," a familiar name across Japan and America, with "Wood" evoking durability and Hollywood. This rebranding fueled rapid international growth, starting with a U.S. office in Los Angeles County in 1963.
The brand built its legacy on high-quality audio and communications equipment, excelling in home hi-fi amplifiers like the acclaimed 1970 Supreme 1 multichannel model, receivers, tuners, and speakers with innovations such as polypropylene cones. Kenwood also pioneered car audio systems, including the first audio/video amplifier for home theater in 1981 and anti-theft cassette decks, alongside professional two-way radios and amateur transceivers. While maintaining roots in consumer electronics, it expanded into automotive infotainment.
Today, as part of JVCKENWOOD since the 2008 merger with JVC, Kenwood holds a solid mid-tier position in car audio and professional communications, prized by enthusiasts for reliable performance and aftermarket upgrades. Its vintage home hi-fi gear from the 1970s and 1980s commands respect among collectors for robust build and warm sound, though it no longer dominates pure hi-fi markets.
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