GB721976A - Improvements in and relating to sound reproducing apparatus - Google Patents

Improvements in and relating to sound reproducing apparatus

Info

Publication number
GB721976A
GB721976A GB20198/52A GB2019852A GB721976A GB 721976 A GB721976 A GB 721976A GB 20198/52 A GB20198/52 A GB 20198/52A GB 2019852 A GB2019852 A GB 2019852A GB 721976 A GB721976 A GB 721976A
Authority
GB
United Kingdom
Prior art keywords
resistance
loudspeaker
resistor
capacitor
sound reproducing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB20198/52A
Inventor
John Victor Corney
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferguson Radio Corp Ltd
Original Assignee
Ferguson Radio Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferguson Radio Corp Ltd filed Critical Ferguson Radio Corp Ltd
Priority to GB20198/52A priority Critical patent/GB721976A/en
Priority to US371263A priority patent/US2802054A/en
Publication of GB721976A publication Critical patent/GB721976A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/22—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with tubes only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers

Abstract

721,976. Sound reproducing circuits. FERGUSON RADIO CORPORATION, Ltd. July 20, 1953 [Aug. 11, 1952], No. 20198/52. Drawings to Specification. Class 40 (4). A resistor and a capacitor are connected in series between the input terminals of a conetype moving-coil loudspeaker, the resistor having a resistance R substantially equal to the effective resistance of the speech coil of the loudspeaker, and the capacitor having a capacity C such that 1/(2#foC) is substantially equal to R, where fo is the frequency at which the resistance R and the reactance 2#foL of the speech coil are equal. This is shown to result in a constant and purely resistive load for frequencies above the resonant frequency of the loudspeaker. Two such arrangements associated with loudspeakers for reproducing relatively high and relatively low frequencies respectively may be fed via a constant resistance cross-over network.
GB20198/52A 1952-08-11 1952-08-11 Improvements in and relating to sound reproducing apparatus Expired GB721976A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB20198/52A GB721976A (en) 1952-08-11 1952-08-11 Improvements in and relating to sound reproducing apparatus
US371263A US2802054A (en) 1952-08-11 1953-07-30 Sound reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20198/52A GB721976A (en) 1952-08-11 1952-08-11 Improvements in and relating to sound reproducing apparatus

Publications (1)

Publication Number Publication Date
GB721976A true GB721976A (en) 1955-01-19

Family

ID=10142033

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20198/52A Expired GB721976A (en) 1952-08-11 1952-08-11 Improvements in and relating to sound reproducing apparatus

Country Status (2)

Country Link
US (1) US2802054A (en)
GB (1) GB721976A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT225767B (en) * 1961-05-17 1963-02-11 Akg Akustische Kino Geraete Sound receiver with directional effect
US3457370A (en) * 1965-12-30 1969-07-22 C P Boner & Associates Impedance correcting networks
HU163253B (en) * 1971-08-16 1973-07-28
US3838215A (en) * 1973-04-23 1974-09-24 E Haynes Speakers and crossover circuit
US4198540A (en) * 1976-05-24 1980-04-15 Cizek Audio Systems, Inc. Compensated crossover network
US4109107A (en) * 1977-07-05 1978-08-22 Iowa State University Research Foundation, Inc. Method and apparatus for frequency compensation of electro-acoustical transducer and its environment
US4177431A (en) * 1978-03-17 1979-12-04 Polk Matthew S Jr Loudspeaker-cable interface
US4340778A (en) * 1979-11-13 1982-07-20 Bennett Sound Corporation Speaker distortion compensator
US5568560A (en) * 1995-05-11 1996-10-22 Multi Service Corporation Audio crossover circuit
US5937072A (en) * 1997-03-03 1999-08-10 Multi Service Corporation Audio crossover circuit
US6707919B2 (en) 2000-12-20 2004-03-16 Multi Service Corporation Driver control circuit
WO2007112404A2 (en) * 2006-03-27 2007-10-04 Knowles Electronics, Llc Electroacoustic transducer system and manufacturing method thereof
DK2688313T3 (en) 2012-07-19 2020-01-27 Ioannis Stamatopoulos Passive speaker rmultiplexer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1772374A (en) * 1923-05-03 1930-08-05 Rca Corp Signaling system
GB416982A (en) * 1933-03-24 1934-09-24 Standard Radio Relay Services Improvements in and relating to means for controlling the tone of low frequency speech currents of sound reproducing apparatus
US2007748A (en) * 1933-06-01 1935-07-09 Rca Corp Acoustic device
US2612558A (en) * 1946-08-13 1952-09-30 Paul W Klipsch Crossover filter network

Also Published As

Publication number Publication date
US2802054A (en) 1957-08-06

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