world production range launched known speaker shaped somewhat like home electric curved slightly vertical axis widely admired clarity precision known difficult speakers run maintain original production hailed important speakers 20th century succeeded remained production maintains speakers range history launched ribbon hybrid horn loaded corner ribbon commercially successful designed company founder principle elaborated general_electric granted patent immediately book published scientific merits inspired walker develop enabled film developed came market walker demonstrated prototype panel speaker exceptional clarity frequency infinite speaker ample bass response british sound recording association annual exhibition research large panel speaker better response frequency range demonstrated march entered commercial production discontinued development successor began giving rise product launched attempted address bass response original extreme high frequencies goal achieved splitting concentric rings fed slight time delay compared ring immediately attempting emulate point source left factory superseded speaker described speaker having designed music classical listeners play records musical enjoyment sound launched speaker priced believing audio system able extract value recording mediocre sound recordings consists slightly curved flat panel designers intended variously referred descendants simply referred legacy walker called concept fred acronym range design speaker frame support charged uses ultra thin stretched oriented film main component drive units plates potential difference volts thin film coated mildly electrically substance sound produced audio signal step sets film motion different charge plates allows alternately attracted repelled plate original bass panels flank panel provide range sound panel subdivided sections achieved centre sections driven separately entire unit operates substantially lower operating said bass speaker needs charged prior use operates constant charge mode takes time charge build practice speaker usable charging half minute sound gradually improves charge builds best performance achieved speaker charged fully hour electricity charge consumption design away major weaknesses boxed speakers enclosure signal degradation crossover crossover consists merely work inherent speaker elements obtain order response sides elements enclosed directly air crossover components box induced reflections fast response low distortion characteristic driver inch thick weighing capable stopping starting seemingly necessary drive units design limits tnt noted upper register starts falls severely speaker design makes extremely directional general practice toe speakers point directly listener slight difference practice possible person enjoy reasonably balanced sound stage contrary flat appearance panels slightly curved vertical axis improve quality panels flat obtain slightly bent curved backing nature speaker sound surfaces application felt sheet rear panels high frequencies crossover network set remains necessary adjust interference causing loss output low frequencies addition speaker stand free space achieve sound instructions book contains advice placement speaker corners positions close parallel walls explains corner placement adversely affect bass response detrimental standing waves generated load highly consume large amounts power feeds opposition points cycle demanding stability designed power power capable delivering channel excessive voltage input known cause speaker panels fact instructions book states properly regulated delivering unlikely cause damage speaker speakers accurately rated voltage power case rated nominal limit volts reached power output reaches driving conventional load common failure modes loss sensitivity caused dust speaker panels internal panels caused excessive power step use high altitudes cause effect novel electrical characteristics speaker cause unstable result damage late speaker life owners found highly stable launched worked construction measures inches weighs pounds terms appearance original expanded metal little wooden feet earlier version golden bronze classic teak end caps later production versions black end caps finish minor variants exist speaker electronics components consisting mainly audio power supply crossover fixed base cabinet original suffered reliability issues frequently caused use inappropriate driven hard main arc audio seize exposed excessive design lack structural integrity seen significant weakness inception lived successors shortcomings include limited sound pressure levels meaning won play loud bass response lacking addition reviewer experienced problems shut downs playing music high intensity bass drums product revisions brought generations classic design originally designed sound domestic context sound prompted manufacturer modify panels improve stereo speakers featured larger panels revolutionary design concentric rings fed centre delay lines audio signal gives illusion point source foot panel addressed limitations original design degree development newer design initiated product released changed orientation measures inches speaker smaller new protection circuit incorporated prevent action protection circuit detect high frequency noise accompanies air speaker arcs power occurs power rating increased furthermore panels original prone attracting dust dust proof new marketing position needed market rising pound sterling product expensive customers decided improve specification target price point monitor version modelled rugged professional model possessed metal steel frame instead aluminium created recording division reception launch awaited launched articles written wireless world appeared cover generally received launch speaker dubbed walker wonder early studio monitors controlling sound quality broadcasts professional users included bbc original production sold pairs life despite major weaknesses universally hailed important speakers 20th century said product walker elevated god like status audio world notes loyalty owners speaker fascination people demand second hand versions original later remains years discontinued demand customers resulted manufacture continuing machine manufacture bought representative germany continue manufacture complete speakers spare parts overhaul customers speakers small companies world dedicated speaker commenting considered major failure speaker shut orchestral said regardless sonic merits possesses speaker simply power handling capability recent program material signature sound renowned sonic transparency low distortion performance usually described terms common designs sound neutral exceptionally response fast properly stereo pair generate small sweet spot sound stage focus led criticisms speaker practice rarely problem benefit reducing effects room experience listening described non wrote june neutral sound bass natural response excellent boxes superior sonic characteristics offset moderate power handling need relatively large space breathe usable frequency response past occasionally criticised bass light moderate bass extension considered adequate classical music fans later incarnations said deliver better bass performance
Quad Electrostatic Loudspeaker