JC3+ Halo by Parasound Phono Preamplifier

Product Overview

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

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

Superior R-core type power transformer

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)

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.

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 Ω

MC: 50 - 550 Ω variable, 47k Ω fixed

Output Impedance

Unbalanced: < 100 Ω

Balanced: < 100 Ω per leg

Input Capacitance

150 pF

Input Sensitivity at 1 kHz

MM: 4mV for 1 V output

MC: 600µV 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)

Dimension

Height without feet: 3.5”

Useful Documents