{"product_id":"mark-levinson-nº-5302-stereo-power-amplifier-the-grid-hifi-copy","title":"Mark Levinson Nº 631 Monoblock Amplifier | The Grid HiFi","description":"\u003ch1 class=\"w6asjq_TextBase GgxHUa_Title PDq2pG_selectionAnchorContainer\"\u003eMark Levinson Nº 631 – Flagship Monaural Power Amplifier\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"BjVYla_Image BjVYla_OverlayBox BjVYla_LoadingFrame\"\u003e\n\u003cimg alt=\"№ 631 | Monaural Amplifier\" class=\"CrFGHG_Image BjVYla_Image BjVYla_LoadingImage\" draggable=\"false\" src=\"https:\/\/images.openai.com\/static-rsc-4\/WoZH-iCASWq8lisAzxPB1bbInP-DSGFpilTknu2TkkYrwEzgN1QkT08_-bwUIgms93MBUdrKq8gLjrkiFmajZ99e2nAaE0ohW6twOj9o9BeguJ8ici8zx8jo6TtHJJp2I_EerLeS_41AUNCx3Kyy3Q1vQmIW_wRzKGeajpNUAks?purpose=inline\"\u003e\n\u003cdiv class=\"BjVYla_LoadingSurface\"\u003e\n\u003cdiv class=\"oIb9lq_Box _48e6ya_LoadingBlock\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eOne Amplifier. One Channel. An Entirely New Level of Ambition.\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Mark Levinson Nº 631 is the flagship power amplifier of the 600 Series, engineered for listeners building a reference audio system without compromise.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThis fully discrete, fully differential monaural amplifier combines Mark Levinson's proprietary Pure Path circuitry with a high-current linear power supply, selectable high-bias operation, and a dedicated chassis for each audio channel.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDesigned to drive demanding loudspeakers with control and precision, the Nº 631 brings together the brand's established amplification philosophy and its striking new Tectonic industrial design.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eA sculpted aluminum-and-steel enclosure, glass detailing, signature red illumination, and a substantial floorstanding form make the Nº 631 as distinctive visually as it is technically.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFor a conventional stereo system, two Nº 631 amplifiers provide independent amplification for the left and right loudspeakers.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003eImportant product information\u003c\/div\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631 is a single-channel monaural power amplifier, sold individually. Two amplifiers are required for conventional stereo playback.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"S6IMGG_Divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"PSWZZq_List\"\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFlagship 600 Series Amplification:\u003c\/span\u003e Mark Levinson's dedicated monaural power amplifier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003ePure Path Circuit Design:\u003c\/span\u003e Proprietary analog amplification architecture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFully Discrete, Fully Balanced Signal Path:\u003c\/span\u003e Individual components arranged in a fully differential circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eClass A\/AB Operation:\u003c\/span\u003e High-current amplification with a selectable high-bias mode.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDedicated Monaural Architecture:\u003c\/span\u003e One amplifier chassis and power supply per audio channel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eUltra-Low-Noise Toroidal Power Supply:\u003c\/span\u003e Custom transformer positioned centrally and structurally isolated.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eLow-Feedback Circuit Design:\u003c\/span\u003e Engineered for high inherent linearity and wide bandwidth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eBalanced and Unbalanced Inputs:\u003c\/span\u003e XLR and RCA connectivity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDual Hurricane Speaker Terminals:\u003c\/span\u003e Two pairs of substantial loudspeaker binding posts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eVibration-Controlled Construction:\u003c\/span\u003e Modular internal layout, isolated components, and mechanically decoupled feet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eTectonic Industrial Design:\u003c\/span\u003e Black chassis, silver plinth, glass elements, and red accent lighting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eProfessional Integration:\u003c\/span\u003e 12V trigger input\/output and USB service connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"PSWZZq_Item\"\u003e\n\u003cdiv class=\"PSWZZq_Content\"\u003e\n\u003cdiv class=\"PSWZZq_Label\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAmerican Engineering:\u003c\/span\u003e Designed and engineered in the USA.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"S6IMGG_Divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003ePure Path: The Foundation of Mark Levinson Amplification\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAt the heart of the Nº 631 is Mark Levinson's proprietary Pure Path analog circuit design.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eIts fully discrete, fully balanced architecture uses a differential signal path engineered to maintain signal integrity throughout the amplification process.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eRather than relying on extensive corrective feedback, the circuitry is designed to achieve high inherent linearity. This allows the amplifier to operate with relatively little feedback while maintaining low distortion and wide bandwidth.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe design also employs unusually high bias current, supporting linear operation and the ability to respond rapidly to changes in the musical signal.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThese engineering choices are intended to preserve the detail, spatial information, and dynamic contrasts contained in the original recording.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eTrue Monaural Amplification\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631 is dedicated to a single audio channel.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eIn a stereo configuration, one amplifier drives the left loudspeaker while a second drives the right. Each channel benefits from its own chassis, amplification circuitry, and power supply.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThis arrangement separates the electrical demands of the two channels and allows each amplifier to be positioned according to the needs of the listening room.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFor large floorstanding loudspeakers and ambitious reference systems, the Nº 631 offers a purpose-built approach to amplification.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eIts monaural architecture also makes it a natural partner for the Mark Levinson Nº 626 preamplifier, creating a complete separates-based 600 Series system.\u003c\/p\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eClass A\/AB with Selectable High-Bias Mode\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631 combines Class A\/AB amplification with a selectable high-bias operating mode.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eBias current is an important part of amplifier design because it influences how the output devices operate as the audio signal changes.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631's high-bias architecture is engineered to improve linearity while retaining the output capability of a high-current power amplifier.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe selectable mode gives owners an additional operating option for their system.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eBecause high-bias operation can affect heat generation and power consumption, the amplifier should be installed with the ventilation clearances specified by Mark Levinson.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eA Power Supply Built for Demanding Loudspeakers\u003c\/h2\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"BjVYla_Image BjVYla_OverlayBox BjVYla_LoadingFrame\"\u003e\n\u003cimg alt=\"Mark Levinson No. 631 Mono-Endverstärker  | Auditorium\" class=\"CrFGHG_Image BjVYla_Image BjVYla_LoadingImage\" draggable=\"false\" src=\"https:\/\/images.openai.com\/static-rsc-4\/xxvSWOjj0Kv6Q3LEK7T2TnfptHizLRMcwZzjB6qU2nnqB828sy5qYmgla50I-1HoK10VoTcmhVca3syOHwG-XOsFCNRN9JzBtySIuVCm1ZkAEbU-tBxYYE3wfKt8dG9E6cQUQ7IaCpdn8ezUU1yBqRYwdChAjiFC_rnj3HG0QUE?purpose=inline\"\u003e\n\u003cdiv class=\"BjVYla_LoadingSurface\"\u003e\n\u003cdiv class=\"oIb9lq_Box _48e6ya_LoadingBlock\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eA reference power amplifier needs a power supply capable of responding to demanding musical passages.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631 uses a custom-designed, ultra-low-noise toroidal transformer located centrally within the chassis.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe transformer is structurally isolated to help minimize the transfer of mechanical vibration to sensitive amplifier circuitry.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eIts linear power supply is designed to support the current demands of the output stage, while the amplifier's low-feedback architecture and high-bias operation contribute to its overall performance.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe result is an amplifier engineered to maintain control during complex musical passages, from low-level acoustic recordings to large-scale orchestral performances.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eTectonic Design: A New Expression of Mark Levinson\u003c\/h2\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"BjVYla_Image BjVYla_OverlayBox BjVYla_LoadingFrame\"\u003e\n\u003cimg alt=\"№ 631 | Monaural Amplifier\" class=\"CrFGHG_Image BjVYla_Image BjVYla_LoadingImage\" draggable=\"false\" src=\"https:\/\/images.openai.com\/static-rsc-4\/Zvu1wFe0L0tMsGnFquxT9kbF6LoPgx5NPrIeLK2r3d1K3LMHDvQ6NiTruw1uX-iiZ_4yZKCa8zTrcUxo3t3649DTQP0gdWzluAk0K71m_IWPl2YItYbx92eXVREs-_RC06dQuAA5WrdqEiH6HXkUHaceYz1IHdXNjWJ3dmWrRVk?purpose=inline\"\u003e\n\u003cdiv class=\"BjVYla_LoadingSurface\"\u003e\n\u003cdiv class=\"oIb9lq_Box _48e6ya_LoadingBlock\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631 introduces a dramatic interpretation of Mark Levinson's industrial design.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eIts floorstanding chassis combines black-anodized aluminum and steel with a contrasting silver plinth.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eA glass center panel flows down the front of the amplifier, framed by red accent lighting. On the top panel, the distinctive glass Core element is surrounded by ventilation and illuminated detailing.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eCustom heatsink side panels provide thermal management while contributing to the amplifier's sculptural appearance.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eInspired by geological forms, the Tectonic design makes the Nº 631 a visual centerpiece for a dedicated listening room.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eIt is an amplifier intended to be seen as well as heard.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eMechanical Isolation by Design\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631's substantial chassis is engineered to address vibration as well as electrical performance.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eIts modular internal architecture separates sensitive low-level analog circuitry from the power supply.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eCritical internal components are mounted using rubber isolation elements, while mechanically isolated feet help reduce the transfer of vibration between the amplifier and the supporting surface.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe transformer is also structurally isolated within the enclosure.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eTogether, these measures create a carefully controlled mechanical environment for the amplifier's sensitive circuitry.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eBalanced and Unbalanced Connectivity\u003c\/h2\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\n\u003cdiv class=\"BjVYla_Image BjVYla_OverlayBox BjVYla_LoadingFrame\"\u003e\n\u003cimg alt=\"Official Mark Levinson US store\" class=\"CrFGHG_Image BjVYla_Image BjVYla_LoadingImage\" draggable=\"false\" src=\"https:\/\/images.openai.com\/static-rsc-4\/F0icKuu8FDn3Oac6uI31mHh_kycyCa_ktF11-ewmfPmVEQ2yf_41Q_QrIvFe9zyTmKYdAmCcAwi1QWYiiOxkBJBUEAkb9jvI_5GcViZ6XgPWwQR26U-QsTQlulRtkWnwaR7s9MssUsY6eWxGoGR71_lNyW4U8-s1Pi3Ny6nP2RQ?purpose=inline\"\u003e\n\u003cdiv class=\"BjVYla_LoadingSurface\"\u003e\n\u003cdiv class=\"oIb9lq_Box _48e6ya_LoadingBlock\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631 includes one balanced XLR input and one single-ended RCA input, allowing it to connect with compatible high-performance preamplifiers.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eTwo pairs of Mark Levinson Hurricane binding posts provide secure loudspeaker connections and support compatible bi-wiring arrangements.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFor custom installations, a 12V trigger input and output allow coordinated power operation with compatible components.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eA USB-A service port is provided for maintenance functions.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 631 is a dedicated power amplifier. It requires a compatible preamplifier or another suitable source with volume control.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eThe Ultimate 600 Series Stereo Configuration\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003ePair two Nº 631 monaural amplifiers with the Mark Levinson Nº 626 preamplifier to create a complete reference separates system.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Nº 626 provides analog source selection, high-resolution digital conversion, phono playback, and volume control, while the Nº 631 amplifiers handle the dedicated power amplification for each loudspeaker.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThis configuration is designed for listeners who want independent amplification channels and the flexibility to choose premium loudspeakers and source components.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAt The Grid HiFi, we can help evaluate loudspeaker compatibility, system layout, electrical requirements, and installation considerations for a complete 600 Series system.\u003c\/p\u003e\n\u003cdiv class=\"S6IMGG_Divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eSpecifications are for one Nº 631 amplifier.\u003c\/p\u003e\n\u003cdiv class=\"_6IUVGW_TableFrame\"\u003e\n\u003ctable class=\"_6IUVGW_Table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eSpecification\u003c\/p\u003e\n\u003c\/th\u003e\n\u003cth scope=\"col\"\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDetails\u003c\/p\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eModel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eMark Levinson Nº 631\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eManufacturer SKU\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eMLNO631AM\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eProduct type\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eMonaural power amplifier\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAmplifier channels\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e1\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eSeries\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eMark Levinson 600 Series\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eCircuit architecture\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003ePure Path\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eSignal path\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFully discrete, fully balanced\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAmplifier topology\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFully differential Class A\/AB\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eBias operation\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eSelectable high-bias mode\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003ePower supply\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eCustom ultra-low-noise toroidal linear\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eBalanced input\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e1 × XLR\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eUnbalanced input\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e1 × RCA\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eSpeaker outputs\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e2 pairs of Hurricane binding posts\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eTrigger input\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e1 × 3.5mm, 3–12V DC\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eTrigger output\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e1 × 3.5mm, 3–12V DC\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eService connection\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eUSB-A\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eChassis construction\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAluminum and steel\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eFinish\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eBlack with silver plinth\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAccent lighting\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eRed\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDimensions (H × W × D)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e20.6 × 12.0 × 20.6 inches\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDimensions (metric)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e522.7 × 305 × 521.9mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDesign\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eDesigned and engineered in the USA\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eQuantity for stereo\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e2 amplifiers\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eSpecifications follow Mark Levinson's official product page and published documentation. The manufacturer's preliminary specification sheet contains a conflicting dimensions line; the table uses the dimensions consistently shown on the product page and dimension drawing. Rated output wattage and net weight have been omitted because they could not be reliably established from the published specifications reviewed.\u003c\/p\u003e\n\u003cdiv class=\"Wl_3jG_Trigger\" role=\"button\" type=\"button\" tabindex=\"0\"\u003e\n\u003cdiv class=\"ANObbW_Badge lKEGNW_Badge\"\u003e\n\u003cdiv class=\"oIb9lq_Box\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"S6IMGG_Divider\"\u003e\u003c\/div\u003e\n\u003ch2 class=\"w6asjq_TextBase GgxHUa_Title\"\u003eExperience the Mark Levinson Nº 631 at The Grid HiFi\u003c\/h2\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eThe Mark Levinson Nº 631 is designed for listeners building a reference audio system around exceptional loudspeakers, carefully selected source components, and dedicated amplification.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eAt The Grid HiFi, we specialize in high-performance two-channel audio, premium loudspeaker matching, reference amplification, and professional system design.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003eWhether you're building a complete Mark Levinson 600 Series system or integrating a pair of Nº 631 amplifiers into an existing listening room, our team can help with component selection, system configuration, and installation.\u003c\/p\u003e\n\u003cp class=\"w6asjq_TextBase _85PZeG_Text\"\u003e\u003cspan class=\"w6asjq_TextBase _85PZeG_Text\"\u003eContact The Grid HiFi to discuss the Mark Levinson Nº 631 and design your next reference listening system.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mark Levinson","offers":[{"title":"Default Title","offer_id":55015383728465,"sku":null,"price":39999.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1047\/7178\/0945\/files\/LS_ML_600-series_No631_Top_0007.png?v=1789872792","url":"https:\/\/gridhifi.com\/products\/mark-levinson-n%c2%ba-5302-stereo-power-amplifier-the-grid-hifi-copy","provider":"The Grid","version":"1.0","type":"link"}