(19)
(11) EP 0 267 650 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.04.1990 Bulletin 1990/17

(43) Date of publication A2:
18.05.1988 Bulletin 1988/20

(21) Application number: 87202151.4

(22) Date of filing: 05.11.1987
(51) International Patent Classification (IPC)4: H04R 1/28, H04R 9/06
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 07.11.1986 US 928853

(71) Applicant: Carver Corporation
Lynnwood, WA 98036 (US)

(72) Inventors:
  • Carver, Robert W.
    Snohomish, WA 98290 (US)
  • Croft, James J.
    Seattle, WA 98103 (US)

(74) Representative: Schumann, Bernard Herman Johan et al
Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1
2517 GK Den Haag
2517 GK Den Haag (NL)


(56) References cited: : 
   
       


    (54) Loudspeaker apparatus and method


    (57) An open-back baffle loudspeaker having a higher baffle cut-off frequency and a lower resonant frequency of possibly 25-50Hz. The loudspeaker is made with a relatively high "Q" (e.g., between 2 to 4) so that the effect of the "Q" on amplitude counteracts the effect of baffle roll-off, thus causing the amplitude of the output of the loudspeaker to remain substantially constant from the baffle cut-off frequency to the resonant frequency. The result is a loudspeaker which can more faithfully reproduce relatively low frequency sounds.







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