{"product_id":"46-power-amplifier-lundahl-iso","title":"46 Power Amplifier - Lundahl\/ISO Transformers","description":"\u003ch3\u003eTwo stage 46 valve stereo power amplifier with valve rectified power supply.\u003c\/h3\u003e\n\u003cp\u003eHarnessing four 46 valves - one driver and one output per channel. Coupled via an interstage transformer to preserve signal quality beyond simple capacitor coupling. Each 46 has its own individual DC regulated filament power supply ensuring perfect optimum operating conditions and long life. There's no hum to balance here from inferior AC supply.\u003c\/p\u003e\n\u003cp\u003eA separate choke rectified power supply with the highest quality film capacitors offers a ripple free, black background with huge dynamics. Easily driven direct from a DAC or pair with the \u003ca href=\"https:\/\/davison.audio\/products\/01a-preamplifier-lundahl\"\u003e\u003cspan\u003e01A preamplifier\u003c\/span\u003e\u003c\/a\u003e for the very highest level of performance. Ideally paired with high efficiency speakers, this could be the last power amplifier you'll ever need.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0969\/9891\/6473\/files\/Lundahl_ISO.png?v=1776683568\" alt=\"\"\u003e\u003c\/div\u003e\n\u003ch4\u003eDefault Configuration\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener\" title=\"Lundahl Transformers\" href=\"https:\/\/www.lundahltransformers.com\" target=\"_blank\"\u003eLundahl\u003c\/a\u003e transformers\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener\" title=\"ISO Transformers\" href=\"https:\/\/isotransformers.tokyo\" target=\"_blank\"\u003eISO\u003c\/a\u003e interstage and output transformers\u003c\/li\u003e\n\u003cli\u003e4 x 46 valves\u003c\/li\u003e\n\u003cli\u003eChoice of \u003cstrong\u003e866A\u003c\/strong\u003e mercury (2 x 866A\/2 x 6AX4) or \u003cstrong\u003e836\u003c\/strong\u003e (2 x 836\/2 x 6AX4) valve rectified power supply, (836 is a drop in replacement for 866A). Mercury vapour valves require careful handling. Preheating of the condensed mercury prior to applying power to the anodes is required. For the 866A valve this is approximately 30 minutes after any transportation and then 30 seconds each time the amp is switched on thereafter\u003c\/li\u003e\n\u003cli\u003eColeman regulators for each filament DC supply with precision voltage adjustment via top mounted controls. DHT filament current draw can vary significantly between valves - adjustable regulation ensures low noise, great sound and long life for your valves\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh gloss finish available in any RAL Classic colour (see \u003ca href=\"https:\/\/www.ral-farben.de\/en\/all-ral-colours\" title=\"RAL Colour Chart\" rel=\"noopener\" target=\"_blank\"\u003eRAL Colour Charts\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003eSolid hardwood full width format cases in high grade ash, beech, cherry, maple, oak, sapele or walnut\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener\" title=\"Lundahl Transformers\" href=\"https:\/\/www.lundahltransformers.com\" target=\"_blank\"\u003eLundahl\u003c\/a\u003e transformers\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener\" title=\"ISO Transformers\" href=\"https:\/\/isotransformers.tokyo\" target=\"_blank\"\u003eISO\u003c\/a\u003e interstage and output transformers\u003c\/li\u003e\n\u003cli\u003e\n\u003ca title=\"ClarityCap\" href=\"https:\/\/www.claritycap.co.uk\"\u003eClarityCap\u003c\/a\u003e TC polypropylene film capacitors\u003c\/li\u003e\n\u003cli\u003e\n\u003ca rel=\"noopener\" title=\"Charcroft Resistors\" href=\"https:\/\/www.charcroft.com\" target=\"_blank\"\u003eCharcroft\u003c\/a\u003e Z-Foil bias resistors\u003c\/li\u003e\n\u003cli\u003eTeflon valve sockets\u003c\/li\u003e\n\u003cli\u003ePoint to point UP-OCC 99.999% copper wired\u003c\/li\u003e\n\u003cli\u003eBlack anode caps, black knurled solid aluminium knobs\u003c\/li\u003e\n\u003cli\u003e1 x RCA inputs\u003c\/li\u003e\n\u003cli\u003e1 x speaker outputs at 8 or 16 ohms\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eLifetime warranty to first owner\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCustom Options\u003c\/h4\u003e\n\u003cp\u003eThe design has been optimised to showcase the very best of the 46 however the platform will accommodate components from other manufacturers, including transformers, capacitors, resistors etc. Let us know what you have in mind.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specification\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1.25W output, (measures nearer 1.5W)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eClass A single ended triode operation\u003c\/li\u003e\n\u003cli\u003eFrequency response: 25Hz - 50KHz\u003c\/li\u003e\n\u003cli\u003eCathode biased\u003c\/li\u003e\n\u003cli\u003eZero negative feedback\u003c\/li\u003e\n\u003cli\u003eDimensions (including valves): PSU: 42cm wide\/32 cm deep\/28cm high. Amplifier: 42cm wide\/32 cm deep\/25cm high\u003c\/li\u003e\n\u003cli\u003eWeight: PSU: 19kg. Amp: 18kg\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Davison Audio","offers":[{"title":"866A","offer_id":57105350164857,"sku":"46-866A","price":7995.0,"currency_code":"GBP","in_stock":true},{"title":"836","offer_id":57105350197625,"sku":"46-836","price":7995.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/9891\/6473\/files\/46_866A_v1_2026-Apr-18_06-29-43PM-Front.png?v=1776680316","url":"https:\/\/davison.audio\/products\/46-power-amplifier-lundahl-iso","provider":"Davison Audio","version":"1.0","type":"link"}