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JC 3 Jr. phono preamp

JC 3 Jr. Phono Preamplifier by John Curl

Halo

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features

  • Circuitry designed by legendary John Curl
  • Circuit board layout by Carl Thompson
  • Cartridge options for 47k O MM and MC/MI
  • Variable MC impedance adjustment of 50-550 ohms
  • Gain select for 40 dB/50 dB/60 dB unbalanced (46 dB/56 dB/66 dB balanced)
  • Balanced and unbalanced outputs
  • Mono switch can improve sound of mono & older LPs
  • Convenient auto turn-on by 12V trigger
  • RIAA accurate to within 0.2 dB
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    specifications

    Frequency Response:
    20-20Khz, +/- 0.2dB

    Total Harmonic Distortion
    < 0.02% at 1 kHz

    Signal to Noise Ratio, 40 dB Setting
    >85dB, input shorted, IHF A-weighted
    >80dB, input shorted, unweighted

    Signal to Noise Ratio, 50 dB Setting
    >89dB, input shorted, IHF A-weighted
    >84dB, input shorted unweighted

    Signal to Noise Ratio, 60 dB Setting
    > 94dB, input shorted, IHF A-weighted
    > 91dB, input shorted, unweighted

    Inter-channel Crosstalk
    >80 dB at 1 kHz

    Input Impedance
    MM or MI: 47k O
    MC Variable: 50- 550 O

    Output Impedance
    Unbalanced: < 100 O
    Balanced: < 100 O per leg

    Input Sensitivity at 1 kHz, 4mV Input
    40 dB: 4 mV for 450mV output
    50 dB: 4 mV for 1.4 Volts output
    60 dB: 4 mV for 4.25 Volts output

    Input Sensitivity at 1 kHz, 1V Output
    40 dB: 9 mV for 1.0 Volt output
    50 dB: 3 mV for 1.0 Volt output
    60 dB: 0.9 mV for 1.0 Volt output

    Total Gain
    40 dB / 50 dB / 60 dB (unbalanced output)
    46 dB / 56 dB / 66 dB (balanced output)

    XLR Pin Identification
    1 = Ground (Shield)
    2 = Positive
    3 = Negative (Return)

    AC Power Requirement
    Standby: <1 watt
    Power On: 9 watts
    115 VAC or 230 VAC 50 - 60 Hz

    Dimensions
    Width: 17-1/4” (437mm)
    Depth: 14-3/4” (375mm)

    Depth with cables: 17” (432mm)
    Height: 2-1/2” (63.5mm)
    Height, without feet: 1-3/4” (45mm)

    Weight
    Net: 13 lbs. (5.9 Kg)
    Shipping: 19 lbs. (8.6 kg)

     

    Price $$2995.00 inc gst and delivery