{"product_id":"moon-by-simaudio-491-stereo-power-amplifier-available-for-preorder","title":"Moon by Simaudio 491 Stereo Power Amplifier (available for preorder)","description":"\u003ch3 class=\"title\"\u003eAn analog power amplifier engineered for accuracy, control, and flexible system configurations. As the most powerful model in the Compass Collection, the MOON 461 delivers low distortion, stable performance, and substantial output capability for demanding loudspeakers.\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 class=\"title\"\u003ePerformance and Reliability\u003c\/h3\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eThe MOON 461 is engineered to deliver substantial power while preserving the integrity of the signal.\u003c\/p\u003e\n\u003cp\u003eAt its heart is MDCA, MOON Distortion-Cancelling Amplifier, a proprietary architecture pioneered in the flagship North Collection. Designed to reduce distortion and improve linearity, MDCA helps the 461 reproduce the source signal with clarity, accuracy, and dynamic expression.\u003c\/p\u003e\n\u003cp\u003eTwo proprietary MOON Hybrid Power supply modules, one dedicated to each channel, provide stable, low-noise, high-current power to the amplifier. This dual-mono implementation supports channel separation, lowers crosstalk, and improves current delivery, especially with lower-impedance loudspeaker loads.\u003c\/p\u003e\n\u003cp\u003eThe 461 delivers 150 watts per channel into 8 ohms, 300 watts per channel into 4 ohms, and 450 watts in bridged mono mode into 8 ohms.\u003c\/p\u003e\n\u003cp\u003eAs with all MOON products, the 461 is backed by a 10-year warranty.\u003c\/p\u003e\n\u003ch3 class=\"title\"\u003eExperience and Design\u003c\/h3\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eThe 461 is designed for systems that require both refinement and reserve power.\u003c\/p\u003e\n\u003cp\u003eA rear-panel mode switch allows three amplifier configurations: Stereo, Bridged Mono, and Bi-Amping Mono. Stereo mode supports standard two-channel playback. Bridged Mono mode provides high-power single-channel output. Bi-Amping Mono mode allows separate amplification of a loudspeaker’s low and high frequency sections for greater system flexibility.\u003c\/p\u003e\n\u003cp\u003eWith its black chassis, bead-blasted aluminum cheeks available in black or silver, and clean architectural lines, the 461 carries the distinctive visual language of the Compass Collection. Its proportions are designed for elegant placement in racks, furniture, or dedicated listening spaces.\u003c\/p\u003e\n\u003ch3 class=\"title\"\u003eSound\u003c\/h3\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cp\u003eThe MOON 461 is built to preserve musical structure, detail, and control under demanding conditions.\u003c\/p\u003e\n\u003cp\u003eIts low-noise signal path, dual-mono architecture, and high-current power delivery are designed to maintain stability across a wide range of loudspeaker loads. Rather than imposing a sonic character, the 461 is intended to preserve transparency, dynamic expression, and composure from the quietest passages to more demanding musical peaks.\u003c\/p\u003e\n\u003cp\u003ePaired with the MOON 491 network player \/ preamplifier, the 461 forms the highest-performing system in the Compass Collection.\u003c\/p\u003e\n\u003cdiv class=\"columns design_features small-12 large-6\"\u003e\n\u003cdiv class=\"title\"\u003eDesign features\u003c\/div\u003e\n\u003cul\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp data-end=\"611\" data-start=\"589\"\u003eMDCA – MOON Distortion-Cancelling Amplifier\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp\u003eNo Global Feedback Design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp\u003eMOON Transistors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp data-end=\"510\" data-start=\"479\"\u003eDual-mono internal architecture\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp class=\"p1\"\u003eStereo \/ Bridged Mono \/ Bi-Amping Mono mode switch\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp\u003eTwo proprietary MOON Hybrid Power (MHP) supply modules, one dedicated to each channel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp data-end=\"594\" data-start=\"564\"\u003eMOONLink on dual-Ethernet port\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp data-end=\"612\" data-start=\"596\"\u003eUSB service port\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"content_wrap\"\u003e\n\u003cp data-end=\"641\" data-start=\"613\"\u003eBead-Blasted Aluminum Cheeks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"columns product_features small-12 large-6\"\u003e\n\u003cdiv class=\"title\"\u003eSpecifications\u003c\/div\u003e\n\u003cul\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eOutput Power (Stereo 8 Ω)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e150 W\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eOutput Power (Stereo 4 Ω)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e300 W\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eOutput Power (Mono 8 Ω)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e450 W\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eInput Sensitivity\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e1 V\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eInput Impedance\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e22 kΩ\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eGain\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e31 dB\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eFrequency Response\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e5 Hz – 100 kHz, +0 dB \/ -3 dB\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eTotal Harmonic Distortion + Noise (@ 1 W)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e0.005%\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eTotal Harmonic Distortion + Noise (@ 150 W)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e0.003%\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eIntermodulation Distortion\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e0.005%\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eSignal-to-Noise Ratio\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e114 dB\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eCrosstalk\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e-114 dB\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eDamping Factor\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e425\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003ePower Consumption (Idle)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e35 W\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003ePower Consumption (Full Power Standby)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e34 W\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003ePower Consumption (Low Power Standby)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e1 W\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eDimensions (width x height x depth)\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e16.9x3.5x14.5 in \/ 42.9x8.7x36.8 cm\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"row content_wrap has_right_title\"\u003e\n\u003cdiv class=\"left_title columns align-self-left flex-child-grow\"\u003eShipping Weight\u003c\/div\u003e\n\u003cdiv class=\"right_title columns align-self-right flex-child-shrink\"\u003e24 lbs \/ 11 kg\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe following accessories should be included inside the box with your network player \/ amplifier:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eQuick start guide\u003c\/li\u003e\n\u003cli\u003eAC power cable\u003c\/li\u003e\n\u003cli\u003e1 spare fast-blow fuse\u003c\/li\u003e\n\u003cli\u003eMOONLink\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/simaudio.com\/en\/warranty\/\"\u003eWarranty\u003c\/a\u003e and product registration information (USA and Canada only)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Moon by Simaudio","offers":[{"title":"Two-Tone","offer_id":49107572883699,"sku":null,"price":5000.0,"currency_code":"USD","in_stock":false},{"title":"Black","offer_id":49107572818163,"sku":null,"price":5000.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/9892\/3416\/files\/461-2-tone-3-4-Front-Right-8M5A2334_1400x603px.png?v=1779396448","url":"https:\/\/www.audiovisionsf.com\/products\/moon-by-simaudio-491-stereo-power-amplifier-available-for-preorder","provider":"AudioVision San Francisco","version":"1.0","type":"link"}