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Cutting Edge Electronics since 1982
phone 918-495-0586
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JC 3+ Phono Preamplifier by John Curl

Model # JC3

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  • Designed by John Curl - creator of the legendary Vendetta Research phono preamp
  • Inputs and outputs use Vampire brand 24k gold-plated RCA jacks
  • Balanced outputs use Neutrik brand premium XLR jacks
  • MM 47k ohm, MC 47k ohm or MC variable 50-550 Ohms
  • RIAA accurate within 0.2 dB
  • Exclusively Vishay-Dale resistors in the audio path
  • Triple shielding; low-carbon mild steel partitions isolate the power supplies & AC wires
  • Dual mono design; each audio channel is separately enclosed in its own extruded aluminum enclosure
  • Separate high speed-soft recovery rectifiers, filter caps and voltage regulators for each channel
  • Mono switch can improve sound of mono and older LPs
  • Built-in AC line conditioner to prevent AC noise from polluting the circuits
  • AC polarity reverse switch can reduce hum in many systems
  • Non-magnetic aluminum rear panel for purest sound
  • Turn On Options switch: manual or auto with 12v trigger input
  • Premium detachable heavy gauge IEC AC cord
  • 2u Chassis, rack mountable with HRA2 (sold separately)
How the JC 3+ improves on the original JC 3:
  • Variable MC load adjust independent for each channel from 50-550 ohms with dual gang potentiometers specially made for Parasound by Vishay.
  • Curl-Thompson tweaked circuits to further reduce the JC 3 silent background noise.
  • 24k gold plated copper traces on phono module boards for utmost conductivity and most transparency/detail in the music.
  • 47% larger low ESD power supply filter caps greater reserve for head-snapping dynamics.
  • 82% larger R-core power transformer greater reserve for more low end impact.
  • Ability to turn off illumination of the front panel P logo.
  • Now Available in Silver or Black.

Frequency Response 20 Hz - 20 kHz, +/- 0.2 dB
Total Harmonic Distortion < 0.01% at 1 kHz
Signal to Noise Ratio, MM > 87 dB, input shorted, IHF A-weighted
> 78 dB, input shorted, unweighted
Signal to Noise Ratio, MC > 87 dB, input shorted, IHF A-weighted
> 67 dB, input shorted, unweighted
Interchannel Crosstalk 72 dB at 1 kHz
Input Impedance MM: 47k
MC: 50 - 550 variable, 47k fixed
Output Impedance Unbalanced: < 100
Balanced: < 100 per leg
Input Capacitance 150 pF
Input Sensitivity at 1 kHz MM: 4mV for 1 V output
MC: 600 V for 1 V output
Total Gain MM: 48 dB
MC: 64 dB
XLR Pin Identification 1 = Ground (Shield)
2 = Positive
3 = Negative (Return)
AC Power Requirement Standby: 1 watt
Power On: 12 watts
115 or 230 VAC 50 - 60 Hz
(Selected on Chassis Bottom)
Dimensions Width: 17-1/4" (437mm)
Depth: 13-3/4" (350mm)
Height, with feet: 4-1/8" (105mm)
Height, without feet: 3-1/2" (89mm)
Weight Net: 19 lbs. (8.6 Kg)
Shipping: 26 lbs. (11.8 Kg)
Rack Mount Accessory HRA 2 (may be purchased separately)

Extended warranties are usually very inexpensive and can save you thousands in the future. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Electronics can be large, heavy, and expensive and you probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new electronics should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

Questions or Comments?
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