Diffusori rari, strani, particolari

[spersanti276]

RCA 1C.

Rarissimi.

 

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Con ELVIS.

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RCA LC-1 drive-unit

Imagine a 15" coaxial drive-unit that's so well engineered it doesn't require an electrical crossover between its low- and high-frequency halves. Such a thing exists, albeit in relative obscurity: the RCA LC-1.Introduced in 1947 as the MI-11411, this full-range driver was described by RCA as a "duo-cone" unit—its low- and high-frequency diaphragms had separate voice-coils and separate alnico V magnets—with a high-compliance suspension, a stated frequency range of 25Hz–16kHz, and an acoustical crossover centered at 1600Hz. Notably, the MI-11411 and its progeny were the first speakers to use Kapton voice-coil formers, for enhanced power handling—thanks to the prescience of designer Harry F. Olson, who also invented RCA's iconic 44-A and 77-A microphones.

Four versions in all were made: The LC-1a, LC-1b, and LC-1c are all distinguished from their progenitor by the addition to the bass cone of seven semi-ovoid "acoustic domes" that add a bit of desired mass to the cone, in addition to deflecting the output of the high-frequency driver—the latter effect enhanced by the addition of a stationary two-lobe deflector, referred to in vintage circles as the "butterfly."

 

According to Early Bender, "This brainchild of RCA's brilliant and eccentric Dr. Harry Olson may be the midrange champ among 15" titans." He added that the LC-1 was perhaps the one speaker among his recommendations that received the greatest engineering effort. Jonathan Weiss agrees, adding that the LC-1 is, alongside the Åber-rare Eckmiller, the only time-correct coaxial driver. Asked to describe its sound in a single word, Weiss added, without hesitation, "It's right."RCA produced their own enclosures for pro and domestic LC-1 applications, including the LS-1 wall-mount cabinet and the Olson-designed LS-11 floorstanding cabinet. Weiss says that a previously unpublished Olson design for an LC-1 corner horn has recently come to light; he expects to produce that enclosure before long.

 

[OLIMPIA2]

Klangfilm Euronor Junior

[Ulmerino]

@OLIMPIA2 mi hai suggerito le altre più grandi,  Siemens Bionor

[Ulmerino]

Lowther Hegeman

[Discopersempre2]

16 minuti fa, Ulmerino ha scritto:

@OLIMPIA2 mi hai suggerito le altre più grandi,  Siemens Bionor

Parafrasando uno slogan di una nota banca: "la casa costruita intorno a-......lle casse".

[OLIMPIA2]

@Ulmerino beh allora esageriamo:

KLANGFILM EURONOR

[Ulmerino]

@OLIMPIA2 urca!😁

[78 giri]

20 ore fa, Ulmerino ha scritto:

mi hai suggerito le altre più grandi,  Siemens Bionor

Quanti posti letto hanno?😁

[mattia.ds]

[piergiorgio]

Il 11/07/2025 at 00:21, Ulmerino ha scritto:

Jamo Oriel monoliti dalla veste elegante e dal suono rigoroso.

uno dei migliori diffusori mai ascoltati al top audio. suono godibilissimo, piacevole e per nulla rigoroso, per quanto mi ricordi.

[mattia.ds]

Triangle Octant, ho avuto il piacere di ascoltarle molti anni fa, pilotate dai finali Klimo Linnet, e rimasi folgorato...

Se avessi una stanza adatta, me le prenderei senza indugi. 

[Ulmerino]

@piergiorgio rigoroso inteso come corretto...senza sbavature code o colorazioni 

[indifd]

Il 21/07/2025 at 22:48, OLIMPIA2 ha scritto:

KLANGFILM EURONOR

 

[BEST-GROOVE]

Il 7/7/2025 at 15:41, Ulmerino ha scritto:

 

Il 7/7/2025 at 15:41, Ulmerino ha scritto:

Artiglieria pesante...Bozak Concert Grand, nelle varie release estetiche e disposizione altoparlanti...4 woifer da 30 con cono in lana pressata, midrange e tweeter in alluminio rivestito di lattice...ascoltate anni fa in una mansarda, suono immanente e molto corposo sui mediobassi, richiedono ampissimi spazi per rendere al meglio...il modello più piccolo mi pare le avesse @bambulotto

 

 

 

 

 

A vederle in queste foto esteticamente sono ....per stomaci forti e orecchie di ghisa!  

[BEST-GROOVE]

Il 21/7/2025 at 22:48, OLIMPIA2 ha scritto:

KLANGFILM EURONOR

 

prodotte da un gruppetto di sordi appassionati audiofili del ku klux Klang