{"product_id":"puresound-p20-valve-mm-phonostage","title":"Puresound P20 valve MM phonostage","description":"\u003cp\u003ePuresound P20 Phonostage\u003c\/p\u003e\n\u003cp\u003eThe P20 is a valve phono stage developed from the highly regarded P10, designed for listeners who want to get the most from vinyl playback while maintaining a simple, low-feedback circuit approach.\u003c\/p\u003e\n\u003cp\u003eKey features:\u003c\/p\u003e\n\u003cp\u003e• valve phono stage\u003cbr\u003e• compatible with MM and high-output MC cartridges\u003cbr\u003e• transformer-coupled output stage\u003cbr\u003e• passive RIAA equalisation\u003cbr\u003e• zero negative feedback design\u003cbr\u003e• dual power transformer configuration\u003c\/p\u003e\n\u003cp\u003eDesign and performance:\u003c\/p\u003e\n\u003cp\u003eThe P20 uses a two-stage valve circuit based on double triodes. The first stage operates in a simple anode follower configuration, while the second stage is transformer-loaded using in-house designed output transformers. This allows the ECC88 to deliver full voltage swing cleanly to the following line stage.\u003c\/p\u003e\n\u003cp\u003eThe second stage is biased so that no coupling capacitor is required between the first stage and the equalisation network, helping preserve signal integrity.\u003c\/p\u003e\n\u003cp\u003eRIAA equalisation is implemented using passive components, maintaining long-term accuracy and avoiding the phase shift associated with active equalisation designs.\u003c\/p\u003e\n\u003cp\u003eMaterials and construction:\u003c\/p\u003e\n\u003cp\u003e• ECC83 input valve\u003cbr\u003e• ECC88 (6922) output valve\u003cbr\u003e• custom in-house output transformers\u003cbr\u003e• dual independent power transformers\u003cbr\u003e• passive RIAA network\u003c\/p\u003e\n\u003cp\u003eTwo separate power transformers are used: one for the ECC83 stage and one for the ECC88 stage. Each has its own HT (high voltage) and LT (filament) supply, reducing noise and improving stability.\u003c\/p\u003e\n\u003cp\u003eSound characteristics:\u003c\/p\u003e\n\u003cp\u003e• clear, natural analogue presentation\u003cbr\u003e• low background noise\u003cbr\u003e• strong dynamic stability\u003cbr\u003e• balanced and controlled sound\u003cbr\u003e• composed handling of complex material\u003c\/p\u003e\n\u003cp\u003eThe absence of negative feedback and use of transformer coupling contribute to a more direct and uncoloured sound.\u003c\/p\u003e\n\u003cp\u003eBuild and usability:\u003c\/p\u003e\n\u003cp\u003eThe P20 provides sufficient output to drive any line-level input on an integrated amplifier or preamplifier. For low-output MC cartridges, a step-up transformer such as the Puresound T10 MC Step-Up Transformer is recommended.\u003c\/p\u003e\n\u003cp\u003eSpecifications:\u003c\/p\u003e\n\u003cp\u003e• input impedance: 47kΩ\u003cbr\u003e• output impedance: 4.7kΩ\u003cbr\u003e• frequency response: 20Hz – 50kHz (-1dB)\u003cbr\u003e• gain: 40dB\u003cbr\u003e• valves: ECC83 x1, ECC88 x1\u003cbr\u003e• dimensions: 360 x 310 x 100mm\u003cbr\u003e• weight: 5.5kg\u003c\/p\u003e\n\u003cp\u003eNote:\u003c\/p\u003e\n\u003cp\u003eThe P20 is designed for MM and high-output MC cartridges. Low-output MC cartridges will require a suitable step-up device for optimal performance.\u003cbr\u003e\u003c\/p\u003e","brand":"Puresound","offers":[{"title":"Default Title","offer_id":58297879232896,"sku":"PRS-P20-VLV-MM","price":1529.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1002\/6926\/1184\/files\/rs_w_1200_h_1200-3_be436412-4529-4a4a-a391-e03bde9c1ef6.png?v=1781876742","url":"https:\/\/thespinningroomhifi.co.uk\/products\/puresound-p20-valve-mm-phonostage","provider":"The Spinning Room Hifi","version":"1.0","type":"link"}