{"product_id":"puresound-l300-valve-based-preamplifier","title":"Puresound L300 valve based Preamplifier","description":"\u003cp\u003ePuresound L300 Valve Preamplifier\u003c\/p\u003e\n\u003cp\u003eThe L300 is Puresound’s flagship valve preamplifier, designed to deliver maximum signal integrity, drive capability, and musical energy. Combining transformer coupling with a highly regulated valve power supply, it offers a refined and controlled presentation without sacrificing dynamics.\u003c\/p\u003e\n\u003cp\u003eKey features:\u003c\/p\u003e\n\u003cp\u003e• valve preamplifier\u003cbr\u003e• dual triode gain stages (direct-coupled)\u003cbr\u003e• transformer-coupled outputs\u003cbr\u003e• 5 x line inputs\u003cbr\u003e• 2 x RCA outputs and 2 x balanced XLR outputs\u003cbr\u003e• film potentiometer volume control\u003cbr\u003e• fully regulated valve power supply with 300B regulator\u003c\/p\u003e\n\u003cp\u003eDesign and performance:\u003c\/p\u003e\n\u003cp\u003eThe L300 uses two directly coupled triode stages, with the second stage loaded by a custom output transformer. This transformer steps down the signal to provide a low impedance output, ensuring compatibility with long cable runs and a wide range of power amplifiers.\u003c\/p\u003e\n\u003cp\u003eSource selection is handled by a high-quality switch located close to the input sockets, minimising signal path length before the volume control and amplification stages.\u003c\/p\u003e\n\u003cp\u003eUnlike passive attenuators, the L300 maintains drive and energy, avoiding the loss of impact and control often associated with high-impedance volume control designs.\u003c\/p\u003e\n\u003cp\u003eMaterials and construction:\u003c\/p\u003e\n\u003cp\u003e• dual triode amplification stages\u003cbr\u003e• custom output transformers\u003cbr\u003e• high-quality film potentiometer\u003cbr\u003e• valve rectified, choke-smoothed power supply\u003cbr\u003e• 300B triode used as series regulator\u003cbr\u003e• gas reference valve for voltage stability\u003cbr\u003e• fully regulated filament supplies\u003c\/p\u003e\n\u003cp\u003eThe power supply is a central part of the design. A valve rectifier feeds a choke-filtered stage, followed by a regulated supply using a 300B triode as the series pass element. This ensures a stable voltage regardless of mains fluctuations or signal demand.\u003c\/p\u003e\n\u003cp\u003eSound characteristics:\u003c\/p\u003e\n\u003cp\u003e• strong sense of energy and drive\u003cbr\u003e• highly transparent with no added colouration\u003cbr\u003e• stable and controlled across all listening levels\u003cbr\u003e• excellent tonal accuracy and timbre\u003cbr\u003e• consistent performance regardless of system matching\u003c\/p\u003e\n\u003cp\u003eThe L300 avoids excessive negative feedback, preserving natural dynamics and musical flow.\u003c\/p\u003e\n\u003cp\u003eBuild and usability:\u003c\/p\u003e\n\u003cp\u003eThe inclusion of both RCA and true balanced XLR outputs provides flexibility for integration into a wide range of systems. The low output impedance ensures consistent performance with different amplifiers and cable types.\u003c\/p\u003e\n\u003cp\u003eSpecifications:\u003c\/p\u003e\n\u003cp\u003e• inputs: 5 x RCA\u003cbr\u003e• outputs: 2 x RCA, 2 x XLR\u003cbr\u003e• circuit: dual triode, direct-coupled, transformer output\u003cbr\u003e• volume control: film potentiometer\u003cbr\u003e• power supply: valve rectified, choke filtered, 300B regulated\u003c\/p\u003e\n\u003cp\u003eBrand and design:\u003c\/p\u003e\n\u003cp\u003ePuresound is a UK-based manufacturer focused on high-performance valve amplification. The L300 is designed by Guy Seargent, whose experience includes work with Audio Innovations, Voyd, Heybrook, JPW, and training in Japan with Audio Note \/ Kondo.\u003c\/p\u003e\n\u003cp\u003eNote:\u003c\/p\u003e\n\u003cp\u003eThe L300 is designed for systems where maintaining signal purity, drive, and dynamic expression is critical. Proper system matching will allow it to perform at its highest level.\u003cbr\u003e\u003c\/p\u003e","brand":"Puresound","offers":[{"title":"Default Title","offer_id":58297878839680,"sku":"PRS-L30-VLV-BSD","price":6349.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1002\/6926\/1184\/files\/rs_w_1200_h_1200_877fc719-f8d0-44ca-91a2-8c7f5b3cda1d.png?v=1781876740","url":"https:\/\/thespinningroomhifi.co.uk\/products\/puresound-l300-valve-based-preamplifier","provider":"The Spinning Room Hifi","version":"1.0","type":"link"}