The JC3Jr is a compact phono preamp built for listeners who want great vinyl sound without bulky gear. It’s designed to reveal the full warmth, depth, and emotion of your records—bringing out the soul in each groove with clarity and finesse.
John Curl’s all-analog design offers variable loading, selectable gain, and both balanced and unbalanced outputs—all in a 1U chassis that’s quietly powerful. This is vinyl at its purest, and your setup's perfect finishing touch.
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 Ω
- MC Variable: 50- 550 Ω
- Output Impedance:
- Unbalanced: < 100 Ω
- Balanced: < 100 Ω per leg
- Input Capacitance: 150 pF
- 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)
