Vox Development



Development


Development economics from research to practice. Women leaders increase the provision of public goods that benefit women and children more, and also raise the aspirations of girls and their parents. Johannes Kasinger is Head of Policy Center at the Leibniz Institute for Financial Research SAFE. He is currently pursuing a PhD in Economics at the Graduate School of Economics, Finance, and Management (GSEFM) of the Goethe University Frankfurt on the topic: “Information.

Vox Eu Development

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VOX AMPLIFIERS

The history of the Vox amplifier line is inexplicably tied to the fortunes...and misfortunes...of the succession of the eight UK firms that have owned the Vox marque since 1957. A brief ownership history of Vox follows.

Founded in the early fifties as the Jennings Organ Company of Dartford Kent, UK and renamed Jennings Musical Industries in 1957, JMI developed and manufactured the original designs for the AC-4, AC-10, AC-15, AC-30, AC-50 and AC-100 amplifiers, amongst others. JMI was privately owned by founder Tom Jennings. The main amplifier engineers were Dick Denney and Derek Underdown.

Tom Jennings sold a controlling share in JMI to the British electronics conglomerate Royston Industries in 1964. Royston continued the use of the 'JMI' brand on all Vox products. Tom Jennings, Dick Denney and Derek Underdown were retained. Some of the manufacturing, especially organ production, was moved from Dartford to a Royston facility in nearby Erith, Kent (see photo at right). The UL Series (705, 715, 430, 730, 460, 760, 4120 and 7120) amplifiers and the solid state amplifiers (Traveller, Virtuoso, Conqueror, Defiant, Supreme, Dynamic Bass, Foundation Bass and Super Foundation Bass) were introduced during the Royston era.
By 1967, Dick Denney had left Vox and Royston fired Tom Jennings. Through no fault of Vox, Royston filed for bankruptcy in 1968.While Royston was working through the UK bankruptcy courts, a number of former JMI executives were able to cut a deal with the bank to resume production of Vox. They named their new venture Vox Sound Equipment Ltd. or 'VSEL' for short.

West Street Vox Works, 1967, Erith Kent - Photo Courtesy Roland Bukalo

VSEL concentrated on promoting the recently introduced solid state amplifier designs. VSEL also produced some hand wired AC-30 and AC-50 amps. No new amp models were introduced in the VSEL period. VSEL was eventually shortened to VSL, for Vox Sound Limited. VSL as well filed for bankruptcy in 1969.
A British banking firm named Corinthian Securities held the assets of VSL while in bankruptcy. Vox was treading water during the Corinthian era. Aside from a updated Jaguar Organ, ironically renamed 'Corinthian,' no new products were introduced in this period.
Birch-Stolec Industries purchased Vox from Corinthian Securities in 1970 and moved the manufacturing facilities from Erith, Kent to Hastings, Essex. The 'VSL' name was retained. Birch Stolec owned Lemark Transformers, a major Vox creditor from the VSEL bankruptcy. The V100 head, a 100 watt, all tube, printed circuit amplifer was introduced by Birch-Stolec as were the first printed board versions of the AC-30 and AC-50. They also produced slightly revised versions of the solid state Vox amps introduced by JMI in 1967. Rick Huxley, former bassist for the Dave Clark Five, became sales manager.
Dallas Musical Industries (aka Dallas Arbiter) had previously produced the 'Sound City' amplifier line before purchasing Vox from Birch-Stolec in 1973. Dallas replaced the problematic printed circuit board AC-30 and AC-50 amps introduced by Birch-Stolec with hand wired models similar to the original JMI designs. Dallas also introduced the AC-120, Battery/Mains Escort and the Escort 30 amplifiers.
In 1978, Dallas sold Vox to Rose Morris (RM). Rose Morris was the distributor of Marshall Amplification throughout Europe throughout the 1970s. RM purchased Vox from Dallas in 1978 as a hedge against losing their distribution deal with Marshall. The name of the company was shortened from Vox Sound Limited to 'Vox Limited.' Rose Morris introduced the Escort 50, V125 stack, the Venue and 'Q' series amplifiers and a number of iterations of the AC-30. Paul McCartney still tours with Vox 'Vintage' Series AC-30 heads produced by Rose Morris.
Korg acquired Vox from Rose Morris in early 1992 and started the most prolific period of Vox amplifier development since the JMI era.


UK VOX AMPLIFIERS . . .

  • Vox Amplifiers - JMI Era: 1958 - 1966
  • Vox 'UL' Hybrid Amplifiers (solid state preamp, tube output stage) - JMI Era: 1966
  • Vox Solid State Amplifiers - JMI and VSEL Eras: 1966-1972
  • Vox Tube Amplifiers - VSEL Era: 1968-1969
  • Vox Tube Amplifiers - Birch-Stolec Era: 1970-1972
  • Vox Tube and Solid State Amplifiers - Dallas Musical Industries (DMI) Era: 1973-1978
  • Vox Tube and Solid State Amplifiers - Rose Morris Era: 1978-1993
  • Vox Tube Amplifiers - Korg Era: 1993-2020
  • Vox Solid State and Tube Preamp Amplifiers - Korg Era: 1999-2020
  • Vox Valvetronix Series Amplifiers - Korg Era: 2001 - 2016


UK VOX AMPLIFIERS - JMI Era - 1958-1968

THE AC-2, AC-4, AC-6 and DOMINO AMPS - 1958 - 1967

  • The AC-4 Chassis - 'A Look 'Under the Hood'
    • Close-up: The AC-4's Vent and Corner.
    • Close-up: The AC-4's Control Panel.
    • Close-up: The AC-4's VOX Logo.
    • Close-up: The AC-4's Cosmetic Features.
    • Close-up: The AC-4's Handle

  • Domino Piggy Back Bass Amplifier

THE AC-10 - 1959 - 1967




THE AC-15 - 1958 - 1968
  • The AC-15 TV Front Guitar Amplifier - First Version Circuit - 1959 Model
    • The AC-15 TV Front Guitar Amplifier - 1959 Model - A Look 'Under the Hood'

  • The AC-15 Two-Tone 1x12 Guitar Amplifier - Early 1960 Model - Coming Soon

  • The AC-15 Two-Tone 1x12 'Bass' Amplifier - Early 1960 Model

  • The AC-15 Cream Vinyl 1 x 12' - Later 1960 Model 1960 Model
    • The AC-15 Chassis - A Look 'Under the Hood'


  • The AC-15 - 1 x 12' 1963 Model - Coming Soon

THE AC-15 TWIN - 1962 - 1968


THE JMI VOX AC-30/4 - 1959 - 1960
  • The AC-30/4
    • Close-up: The AC30/4 Chassis - A Look Under the Hood'


THE JMI VOX AC-30/6 - 1960 - 1968

  • The AC-30/6 Twin - 'Normal Model' - Fawn Vinyl - 1960
    • Close-up: The AC-30/6 Chassis - A Look 'Under the Hood'

  • The AC-30/6 'Bass Model' 2x12' Amp with Fawn Vinyl and Thin Edge Cabinet - 1962
    • Close-up: The AC-30/6 Chassis - A Look 'Under the Hood'

  • The AC-30/6 'Bass Model' 2x12' Amp with Smooth Black Vinyl - 1963
    • Close-up: The AC-30/6 Chassis - A Look 'Under the Hood'

  • The AC-30/6 'Treble Model' 2x12' Amp with Brown Grill Cloth - 1964
    • Close-up: The AC-30/6 Chassis - A Look 'Under the Hood'

  • The AC-30/6 'Treble Model' 2x12' Amp with Swivel Side Stands - 1965
    • Close-up: The AC-30/6 Chassis - A Look 'Under the Hood'

  • The AC-30/6 Twin 'Top Boost Model' with Black Grill Cloth - 1965
    • Close-up: The AC-30/6 'Top Boost In Panel' - A Look 'Under the Hood'


  • The AC-30 Super Twin Reverb with Top Boost and Trapezoid AmpHead - 1965
    • The AC30SRT Super Reverb Twin Trapezoid Amp Head - 'Under the Hood'


THE JMI VOX LW30 - LIGHT WEIGHT 30 AMPLIFIER - 1964 - 1965

  • The Vox LW30

THE JMI AC-50 AMP HEAD (1964 - 1969)

  • The AC-50 Mk I Thin Edge, Two Input, Single Channel Small Box 'Washington DC' Head
  • The AC-50 Mk I Thin Edge, Four Input, Single Channel Small Box Head
  • The AC-50 Mk II Thick Edge, Four Input, Single Channel Small Box Head
    • The AC-50 Mk II Four Input Chassis - 'A Look Under the Hood'
  • The AC-50 Mk II Dual Channel, GZ-34 Tube Rectified Tall Box Head
    • The AC-50 Mk II Dual Channel Tube Rectified Chassis - 'Under the Hood'
  • The AC-50 Mk III Dual Channel, Diode Rectified Tall Box Head
    • The AC-50 Mk III Dual Channel Diode Rectified Chassis - 'Under the Hood'
  • The AC-50 Mk IV Dual Channel, 'High Gain' Diode Rectified Tall Box Head


THE JMI AC-50 AMP SPEAKER ENCLOSURE (1964 - 1969)

  • The AC-50 Mk I 'Small Box' Speaker Enclosure

  • The AC-50 MK II 'Big Box' Speaker Enclosure
    • Close up: The Midax Horn
    • Close-up: The AC-50 Super Twins' Fane Speaker

THE AC-50 SUPER TWIN AMPLIFIER (1964-1969)



THE FOUNDATION BASS (TUBE MODEL) - 1963 - 1966

THE AC-100 '80-100 WATT AMPLIFIER' - 1963 - 1965
  • The AC-100 '80-100 Watt Amplifier'
    • Close-up: The AC-100 Trolley Stand
    • Close-up: The AC-100's Midax Horn.

  • The AC-100 '80-100 Watt' Amp Head
    • The AC-100 Head - Serial 430 -A Look 'Under the Hood'

THE AC-100 '100 WATT AMPLIFIER,' (1965), 'AC100/2' (1965-67) and AC-100 MkII 1967 - 1969
  • The AC-100/2 and AC-100 MkII 100 Watt Amplifier
    • Close-up: The AC-100 Trolley Stand
    • Close-up: The AC-100's Midax Horn.

  • The AC100/2 and AC100 MkII Amp Head
    • The AC-100 MkII Head - Serial 1948 - A Look 'Under the Hood'
    • The AC-100 MkII Head - Serial 2290 - A Look 'Under the Hood'


THE T.60 BASS - 1963 - 1965

    VOX METAL CLAD TUBE PA AMPLIFIER/MIXERS 1964 - 1967
    • Vox Metal Clad Tube PA Amplifiers (coming soon)

    THE LS-40 PA SPEAKER 1962 - 1968

    THE LS-15 PA SPEAKER 1964 - 1968

    VOX WALL MOUNT SPEAKER 1962 - 1968
    • Vox Wall Mount PA Speakers (coming soon)

JMI VOX 'UL' TUBE AND SOLID STATE/HYBRID AMP SERIES- 1966

    THE UL 705 (1966)

    THE UL 710 (1966)

    THE UL 710T and UL 715 (1966)

    THE UL 430 BASS AMP (1966)

    THE UL 730 GUITAR AMP (1966)

    THE UL 460 (1966)
    • Vox UL460 Amps - 'A Look Under the Hood' - Power Supply and Power Amp Stages

    THE UL 760 (1966)
    • Vox 760 Amps - 'A Look Under the Hood' - Power Supply and Power Amp Stages
    • The Vox 760 Preamp Stage - A Look 'Under the Hood'

    THE UL 7120 (1966)


    THE UL4120 (1966)


JMI AND VSEL VOX UK SOLID STATE AMP SERIES- 1967 - 1972

    THE TRAVELLER 1967 - 1969

    THE VIRTUOSO (1967- 1969)

    THE CONQUEROR 1967 - 1969
    • A Look 'Under the Hood' of the Conqueror Amp Control Section
      • Close-up: The Conqueror's Head Mounting Assembly.

    THE DEFIANT (1967--1972)

    THE SUPREME (1967 - 1972)

    THE DYNAMIC BASS (1967 - 1969)


    THE SOLID STATE FOUNDATION BASS (1967 - 1972)
    • The Solid State Foundation's Trolley Mount
      • Close-up: The Solid State Foundation's Trolley Mounting Screw
      • Close-up: The Solid State Foundation's Serial Plate
      • Close-up: The Solid State Foundation's Cabinet Wheel
      • Close-up: The Solid State Foundation's Foot Pedal

    THE SOLID STATE SUPER FOUNDATION BASS (1967 - 1972)

    GYROTONE ROTARY ORGAN SPEAKERS (1967 - 1972) - Coming Soon


VOX UK TUBE AMPLIFIERS - VSEL / Corinthian Era- 1968 - 1970

    VSEL AC-30 TOP BOOST


VOX UK AMPLIFIERS - Birch -Stolec Era - 1970-1973

    AC-30 TOP BOOST AND AC-30 TOP BOOST REVERB AMPLIFIERS

    THE V100

VOX UK AMPLIFIERS - Dallas Musical Industries (DMI) - 1973-1978

    THE DALLAS VOX AC-30 TOP BOOST WITH HAND WIRED CONSTRUCTION (1973 - 1976)

    THE DALLAS VOX AC-30 TOP BOOST WITH PRINTED CIRCUIT CONSTRUCTION (1976 - 1978)

    THE DMI HAND WIRED VOX AC-50 AMP HEAD (1973 - 1978)

    THE DMI AC-120 TWIN - 1973

    THE BATTERY/MAINS ESCORT - 1974
    • The Battery/Mains Escort

    THE ESCORT 30 LEAD - 1976

    THE AC-30 SOLID STATE - 1976


VOX UK AMPLIFIERS - Rose Morris Era - 1978-1993

    THE VOX AC-30 TOP BOOST & AC30 TOP BOOST REVERB (1979-1984)

    THE V125 STACK - 1981 - 1983
    • V125 Rear View
      • Close-up: V125 Flag
      • Close-up: V125 Serial Plate
      • Close-up: V125 Output Section
      • Close-up: V125 Mains Plug

    THE V125 (also known as 'Climax') COMBO - 1982 - 1983
    • The V125 2x12' Combo - Coming Soon


    THE V15 - 1981 - 1983

    THE BATTERY/MAINS ESCORT - 1974 - 1983
    • The Battery/Mains Escort

    THE ESCORT SUPER TWIN - 1981 - 1983
    • The Escort Super Twin

    THE ESCORT 30 LEAD - 1976 - 1983

    THE ESCORT 50 - 1981 - 1983

    VOX VENUE SERIES AMPLIFIERS (1984 - 1986)

    THE AC-30TB & AC-30TBR (1985-1988)

    THE CONCERT 100 - (1987 - 1989)
    • The Concert 100
      • Close-up: The Concert 100 Corner
      • Close-up: The Concert 100 Handle
      • Close-up: The Concert 100 Open Chassis View
      • Close-up: The Concert 100 Speaker Output Section
      • Close-up: The Concert 100 Input Power Section

    THE AC-30TBR - MODEL 1007 (1988-1993)

    THE 30th ANNIVERSARY 'LIMITED EDITION' AC30 (1990-1991)

    VOX AC-30TB and TBR 'Vintage' Amplifier ( 1991 - 1993 )

    VOX AC-30TB Collector ( 1991 -1993 )
    • The VOX AC-30TB Collector


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