[{"id":280457379999,"handle":"amplifiers","updated_at":"2025-12-17T09:48:12-07:00","published_at":"2021-12-02T11:49:17-07:00","sort_order":"best-selling","template_suffix":"default","published_scope":"global","title":"Amplifiers","body_html":"","image":{"created_at":"2022-01-04T15:32:28-07:00","alt":"Amplifiers","width":2400,"height":953,"src":"\/\/listenup.com\/cdn\/shop\/collections\/amplifiers.png?v=1641335548"}},{"id":280456888479,"handle":"audio","updated_at":"2025-12-18T12:58:50-07:00","published_at":"2021-12-02T11:21:36-07:00","sort_order":"best-selling","template_suffix":"top-level","published_scope":"global","title":"Audio","body_html":"","image":{"created_at":"2022-01-06T15:53:45-07:00","alt":"audio","width":971,"height":386,"src":"\/\/listenup.com\/cdn\/shop\/collections\/audio.png?v=1641509626"}},{"id":298136633503,"handle":"kef-accessories","updated_at":"2025-12-01T05:09:13-07:00","published_at":"2024-03-07T12:56:03-07:00","sort_order":"best-selling","template_suffix":"","published_scope":"global","title":"KEF Accessories","body_html":"\u003cspan\u003eKEF Accessories offer the perfect complement to your audio setup, enhancing both functionality and aesthetics. From sleek stands and wall brackets to stylish grilles and desk pads, these accessories seamlessly integrate with KEF speakers, elevating your listening experience while adding a touch of sophistication to your space. Additionally, the wireless transmitter ensures hassle-free connectivity, providing flexibility and convenience for a truly immersive audio journey.\u003c\/span\u003e","image":{"created_at":"2024-03-07T12:58:42-07:00","alt":null,"width":1800,"height":1800,"src":"\/\/listenup.com\/cdn\/shop\/collections\/22-kef-lsxii-carbon-black-portrait-with-p1.jpg?v=1709841522"}},{"id":298136764575,"handle":"kef-in-wall-in-ceiling-speakers","updated_at":"2025-11-01T05:09:53-06:00","published_at":"2024-03-07T13:02:42-07:00","sort_order":"price-desc","template_suffix":"","published_scope":"global","title":"KEF In-Wall and In-Ceiling Speakers","body_html":"\u003cp\u003e\u003ca href=\"https:\/\/listenup.com\/pages\/kef\" title=\"KEF Brand Page at ListenUp\"\u003eKEF\u003c\/a\u003e In Wall and In Ceiling Speakers redefine the home audio experience, offering flawlessly accurate three-dimensional sound that immerses listeners in a breathtakingly realistic audio environment. Whether enjoying music or movies, every detail is rendered with startling clarity, thanks to innovative engineering and sophisticated acoustic design. These speakers seamlessly integrate into your living space, providing a compelling performance on par with KEF's revered stand-alone HiFi speakers, ensuring an unparalleled audio journey for discerning enthusiasts.\u003c\/p\u003e","image":{"created_at":"2024-03-07T13:02:41-07:00","alt":"KEF In Wall and In Ceiling Speakers","width":1800,"height":1800,"src":"\/\/listenup.com\/cdn\/shop\/collections\/23-kef-ci3160rlm-thx-lying-side-flat.jpg?v=1727714111"}},{"id":297969582239,"handle":"kef-subwoofers","updated_at":"2025-12-02T05:11:01-07:00","published_at":"2024-02-29T16:45:30-07:00","sort_order":"manual","template_suffix":"","published_scope":"global","title":"KEF Subwoofers","body_html":"\u003cp\u003eExperience the unparalleled immersion of KEF subwoofers, where decades of innovation converge to deliver deep, detailed bass that places you at the center of every moment. Crafted from over 60 years of award-winning speaker expertise, our subwoofer range revolutionizes modern audio experiences for movies, gaming, music, and streaming like never before.\u003c\/p\u003e\n\u003cp\u003eKEF's comprehensive lineup offers a perfect blend of depth and precision, boasting room-friendly designs and cutting-edge technology. From the flagship Reference 8b with twin 9-inch drivers for unparalleled precision to the compact yet powerful KC62, each subwoofer is engineered to elevate your audio to new heights. With the innovative Uni-Core®, Music Integrity Engine®, and P-Flex Surround technologies, KEF subwoofers redefine the benchmark of audio excellence, ensuring every note is delivered with remarkable integrity, detail, and accuracy.\u003c\/p\u003e","image":{"created_at":"2024-02-29T16:45:57-07:00","alt":null,"width":1800,"height":1800,"src":"\/\/listenup.com\/cdn\/shop\/collections\/23-kef-kc62-titanium-frontangle.jpg?v=1709250357"}},{"id":280456986783,"handle":"receivers-amplifiers","updated_at":"2025-12-18T05:08:19-07:00","published_at":"2021-12-02T11:25:03-07:00","sort_order":"best-selling","template_suffix":"top-level","published_scope":"global","title":"Receivers \u0026 Amplifiers","body_html":"","image":{"created_at":"2022-01-04T15:21:55-07:00","alt":"Receivers and Amplifiers","width":1146,"height":455,"src":"\/\/listenup.com\/cdn\/shop\/collections\/receivers-amplifiers.png?v=1641334915"}},{"id":301151355039,"handle":"welcome10","updated_at":"2025-12-18T12:14:43-07:00","published_at":"2024-07-02T15:18:25-06:00","sort_order":"best-selling","template_suffix":null,"published_scope":"web","title":"Welcome10","body_html":null}]
The KEF KASA500 Subwoofer Amplifier surpasses expectations with its powerful Class-D Dual 250WPC design, delivering thunderous bass that elevates any audio experience. Its DSP control ensures optimal performance, while the versatile connectivity options and included rack mount ears make installation a breeze. Whether for home theater enthusiasts or audiophiles seeking premium sound quality, the KASA500 stands as a testament to KEF's commitment to innovation and excellence in audio engineering.
Get the Details
Features & Specs
Crossover Frequencies
40 - 140Hz or software bypass
Inputs
Selectable stereo RCA line level, or mono LFE RCA level; Stereo speaker level
Amplifier Power
2 x 250watts 4ohms; Bridge 1 x 500watts 8ohms (<1% THD)
Selectable stereo RCA line level, or mono LFE RCA level; Stereo speaker level
Amplifier Power
2 x 250watts 4ohms; Bridge 1 x 500watts 8ohms (<1% THD)
Product External Dimension (H X W X D)
88 x 432 x 304mm (3½ x 17 x 12 in.)
Weight
4kg (9 lbs)
Expert Insight
The KEF KASA500 Subwoofer Amplifier impresses with its potent Class-D Dual 250WPC system, delivering thunderous bass and unparalleled audio depth. With DSP control for precision and easy installation aided by versatile connectivity options, it's a must-have for both home theater aficionados and discerning audiophiles seeking top-tier sound quality.
Nate M
Brand Manager
Details
KEF KASA500 Subwoofer Amplifier
Elevate your audio experience with the KEF KASA500 Subwoofer Amplifier. Engineered with precision and power, this Class-D Dual 250WPC amplifier delivers thunderous bass, optimized specifically for KEF Ci subwoofers. Whether you're enhancing your home theater setup or creating a high-fidelity music system, the KASA500 ensures exceptional performance in any configuration.
Key Features:
Powerful Class-D Dual 250WPC amplifier
DSP controlled for optimized bass response
Versatile connectivity with line and speaker level inputs
Configurable pass-through with optional high pass filters
Optional rack mount ears included for flexible installation
Enhanced Flexibility: The KASA500 is designed to adapt to your evolving audio needs. With firmware updates available from KEF engineers, you can optimize performance with additional KEF speakers using the proprietary KASA500 Programmer*. (*Note: USB Type A Male to USB Type A Male cable required for firmware updates.)
Installation Made Easy: The KASA500 manual includes comprehensive installation diagrams for both home theater and music sub/satellite setups, ensuring seamless integration into your audio system.
Specifications:
Color: Black
Crossover Frequencies: 40 - 140Hz or software bypass
Inputs: Selectable stereo RCA line level, or mono LFE RCA level; Stereo speaker level
12 Volt Trigger Input Voltage: 8 to 14 Volt DC @1.5mA max ⅛"" diameter female plug (tip positive or tip negative)
Recommended Amplifier Power: (<1% THD) 2 x 250 watts 4 ohms; Bridge 1 x 500 watts 8 ohms
Amplifier Power: 2 x 250 watts 4 ohms; Bridge 1 x 500 watts 8 ohms (<1% THD)
Product External Dimension (H X W X D):
Without feet: 88 x 432 x 304mm (3½ x 17 x 12 in.)
With feet: 92 x 432 x 304mm (3⅝ x 17 x 12 in.)
With rack ears; 2 EIA rack space: 88 x 483 x 304mm (3½ x 19 x 12 in.)
Upgrade your audio setup with the KEF KASA500 Subwoofer Amplifier and experience unparalleled bass performance tailored to your preferences.
Reviews
Product Description
Product Description
The KEF KASA500 Subwoofer Amplifier surpasses expectations with its powerful Class-D Dual 250WPC design, delivering thunderous bass that elevates any audio experience. Its DSP control ensures optimal performance, while the versatile connectivity options and included rack mount ears make installation a breeze. Whether for home theater enthusiasts or audiophiles seeking premium sound quality, the KASA500 stands as a testament to KEF's commitment to innovation and excellence in audio engineering.
Get the Details
Features & Specs
Features & Specs
Crossover Frequencies
40 - 140Hz or software bypass
Inputs
Selectable stereo RCA line level, or mono LFE RCA level; Stereo speaker level
Amplifier Power
2 x 250watts 4ohms; Bridge 1 x 500watts 8ohms (<1% THD)
Selectable stereo RCA line level, or mono LFE RCA level; Stereo speaker level
Amplifier Power
2 x 250watts 4ohms; Bridge 1 x 500watts 8ohms (<1% THD)
Product External Dimension (H X W X D)
88 x 432 x 304mm (3½ x 17 x 12 in.)
Weight
4kg (9 lbs)
Expert Insight
Expert Insight
The KEF KASA500 Subwoofer Amplifier impresses with its potent Class-D Dual 250WPC system, delivering thunderous bass and unparalleled audio depth. With DSP control for precision and easy installation aided by versatile connectivity options, it's a must-have for both home theater aficionados and discerning audiophiles seeking top-tier sound quality.
Nate M
Brand Manager
Details
Details
KEF KASA500 Subwoofer Amplifier
Elevate your audio experience with the KEF KASA500 Subwoofer Amplifier. Engineered with precision and power, this Class-D Dual 250WPC amplifier delivers thunderous bass, optimized specifically for KEF Ci subwoofers. Whether you're enhancing your home theater setup or creating a high-fidelity music system, the KASA500 ensures exceptional performance in any configuration.
Key Features:
Powerful Class-D Dual 250WPC amplifier
DSP controlled for optimized bass response
Versatile connectivity with line and speaker level inputs
Configurable pass-through with optional high pass filters
Optional rack mount ears included for flexible installation
Enhanced Flexibility: The KASA500 is designed to adapt to your evolving audio needs. With firmware updates available from KEF engineers, you can optimize performance with additional KEF speakers using the proprietary KASA500 Programmer*. (*Note: USB Type A Male to USB Type A Male cable required for firmware updates.)
Installation Made Easy: The KASA500 manual includes comprehensive installation diagrams for both home theater and music sub/satellite setups, ensuring seamless integration into your audio system.
Specifications:
Color: Black
Crossover Frequencies: 40 - 140Hz or software bypass
Inputs: Selectable stereo RCA line level, or mono LFE RCA level; Stereo speaker level
12 Volt Trigger Input Voltage: 8 to 14 Volt DC @1.5mA max ⅛"" diameter female plug (tip positive or tip negative)
Recommended Amplifier Power: (<1% THD) 2 x 250 watts 4 ohms; Bridge 1 x 500 watts 8 ohms
Amplifier Power: 2 x 250 watts 4 ohms; Bridge 1 x 500 watts 8 ohms (<1% THD)
Product External Dimension (H X W X D):
Without feet: 88 x 432 x 304mm (3½ x 17 x 12 in.)
With feet: 92 x 432 x 304mm (3⅝ x 17 x 12 in.)
With rack ears; 2 EIA rack space: 88 x 483 x 304mm (3½ x 19 x 12 in.)