[{"id":639668617375,"handle":"all-regularly-priced-items","updated_at":"2025-07-08T21:25:23-06:00","published_at":"2024-11-30T15:25:35-07:00","sort_order":"best-selling","template_suffix":null,"published_scope":"web","title":"All Regularly Priced Items","body_html":null},{"id":280457379999,"handle":"amplifiers","updated_at":"2025-07-08T14:33:48-06:00","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":"2025-07-09T00:20:08-06:00","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":302044119199,"handle":"moon-power-amps","title":"Moon Power Amps","updated_at":"2025-05-21T11:57:23-06:00","body_html":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cb id=\"docs-internal-guid-407d7c88-7fff-eeb3-c849-1210f95591e1\"\u003e\u003ca href=\"https:\/\/listenup.com\/pages\/moon\"\u003e\u003cspan\u003eMOON\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e,\u003c\/span\u003e\u003c\/b\u003e an exceptional range of sound systems and emotions. MOON power amps and the MOON North Collection are on display for auditions at four ListenUp locations. 877-744-1179 for MOON expertise. \u003cb id=\"docs-internal-guid-407d7c88-7fff-eeb3-c849-1210f95591e1\"\u003e\u003ca href=\"https:\/\/listenup.com\/pages\/reach-for-the-moon-trade-up-program\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eTrade-up to MOON\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c!----\u003e","published_at":"2024-07-18T16:33:20-06:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"vendor","relation":"equals","condition":"MOON"},{"column":"vendor","relation":"equals","condition":"Moon"},{"column":"title","relation":"contains","condition":"Power"},{"column":"title","relation":"not_contains","condition":"open box"}],"published_scope":"global","image":{"created_at":"2024-07-18T16:33:19-06:00","alt":"MOON North Collection 861 Power Amplifier","width":1800,"height":1800,"src":"\/\/listenup.com\/cdn\/shop\/collections\/861_front-2.png?v=1721342000"}},{"id":280456986783,"handle":"receivers-amplifiers","updated_at":"2025-07-08T19:41:06-06:00","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":"2025-07-09T00:20:08-06:00","published_at":"2024-07-02T15:18:25-06:00","sort_order":"best-selling","template_suffix":null,"published_scope":"web","title":"Welcome10","body_html":null}]
Experience unparalleled audio performance with the MOON 400M Monoblock Power Amplifier by Simaudio. Delivering 400 watts into 8 ohms, this amplifier combines power and precision to drive any loudspeaker with ease. Its fully balanced differential circuitry and proprietary MOON Bipolar output transistors ensure accurate and dynamic sound reproduction. Designed for audiophiles, the 400M offers a seamless blend of robust construction and refined audio fidelity.
Get the Details
Features & Specs
High Power Output: 400W into 8Ω; 650W into 4Ω
Fully Balanced Differential Circuitry: Enhanced sound clarity and noise reduction
Proprietary MOON Bipolar Output Transistors: Improved bass response and sonic accuracy
Oversized Toroidal Power Supply: Consistent and reliable performance
Class A Operation up to 10W: Greater efficiency and minimized distortion at lower levels
Versatile Connectivity: Balanced (XLR) and BNC inputs
Fully Balanced Differential Circuitry: Enhanced sound clarity and noise reduction
Proprietary MOON Bipolar Output Transistors: Improved bass response and sonic accuracy
Oversized Toroidal Power Supply: Consistent and reliable performance
Class A Operation up to 10W: Greater efficiency and minimized distortion at lower levels
Versatile Connectivity: Balanced (XLR) and BNC inputs
Expert Insight
The MOON 400M has transformed my listening experience. Its powerful yet nuanced performance brings out the best in every track.
Mike Chapman
Over 30 Years at ListenUp
Details
MOON 400M Power Amplifier
The 400M Power Amplifier delivers extreme power while maintaining the delicacy and articulation of the finest amplifiers. It can drive virtually any loudspeaker with ease, providing a punchy bottom-end slam that anchors the music with authority and weight, immersing you in a live concert-like experience. On the high-end, it offers finesse, detail, and refinement that may redefine your perception of recorded music versus reality.
Without Equal
When paired with the MOON 350P Preamplifier, the combination is unmatched in its class. There’s no more refined pairing at this price point—ideal for discerning audiophiles and those who enjoy high-volume listening without compromising on sound quality.
Key Features
As expected from a MOON product, it comes equipped with essential features like 12V triggers and an RS-232 port for custom installation environments.
Design Features
Fully balanced differential circuitry.
Precision-matched proprietary MOON Bipolar output transistors for enhanced bass and accurate sonic reproduction.
Oversized power supply with a custom proprietary toroidal transformer design.
High damping factor for superior musical dynamics, faster signal speed, and more accurate timbre.
“Class A” output up to 10 watts for improved efficiency.
Experience unparalleled audio performance with the MOON 400M Monoblock Power Amplifier by Simaudio. Delivering 400 watts into 8 ohms, this amplifier combines power and precision to drive any loudspeaker with ease. Its fully balanced differential circuitry and proprietary MOON Bipolar output transistors ensure accurate and dynamic sound reproduction. Designed for audiophiles, the 400M offers a seamless blend of robust construction and refined audio fidelity.
Get the Details
Features & Specs
Features & Specs
High Power Output: 400W into 8Ω; 650W into 4Ω
Fully Balanced Differential Circuitry: Enhanced sound clarity and noise reduction
Proprietary MOON Bipolar Output Transistors: Improved bass response and sonic accuracy
Oversized Toroidal Power Supply: Consistent and reliable performance
Class A Operation up to 10W: Greater efficiency and minimized distortion at lower levels
Versatile Connectivity: Balanced (XLR) and BNC inputs
Fully Balanced Differential Circuitry: Enhanced sound clarity and noise reduction
Proprietary MOON Bipolar Output Transistors: Improved bass response and sonic accuracy
Oversized Toroidal Power Supply: Consistent and reliable performance
Class A Operation up to 10W: Greater efficiency and minimized distortion at lower levels
Versatile Connectivity: Balanced (XLR) and BNC inputs
Expert Insight
Expert Insight
The MOON 400M has transformed my listening experience. Its powerful yet nuanced performance brings out the best in every track.
Mike Chapman
Over 30 Years at ListenUp
Details
Details
MOON 400M Power Amplifier
The 400M Power Amplifier delivers extreme power while maintaining the delicacy and articulation of the finest amplifiers. It can drive virtually any loudspeaker with ease, providing a punchy bottom-end slam that anchors the music with authority and weight, immersing you in a live concert-like experience. On the high-end, it offers finesse, detail, and refinement that may redefine your perception of recorded music versus reality.
Without Equal
When paired with the MOON 350P Preamplifier, the combination is unmatched in its class. There’s no more refined pairing at this price point—ideal for discerning audiophiles and those who enjoy high-volume listening without compromising on sound quality.
Key Features
As expected from a MOON product, it comes equipped with essential features like 12V triggers and an RS-232 port for custom installation environments.
Design Features
Fully balanced differential circuitry.
Precision-matched proprietary MOON Bipolar output transistors for enhanced bass and accurate sonic reproduction.
Oversized power supply with a custom proprietary toroidal transformer design.
High damping factor for superior musical dynamics, faster signal speed, and more accurate timbre.
“Class A” output up to 10 watts for improved efficiency.
In Store Only
