Parasound JC3+ phono preamplifier

Parasound JC3+ features

• 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
• 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)

How the JC 3+ improves on the original JC 3:

• Variable MC load adjust independently 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 maximum 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.

Parasound JC3+ Technical details

Frequency Response
20Hz - 20kHz, +/- 0.2dB

Total Harmonic Distortion
< 0.01% at 1 kHz

Signal to Noise Ratio, MM
> 87 dB, input shorted, IHF A-weighted
> 78 dB, input shortened, unweighted

Signal to Noise Ratio, MC
> 87 dB, input shorted, IHF A-weighted
> 67 dB, input shortened, unweighted

Interchannel crosstalk
72dB at 1kHz

Input impedance
MM: 47kΩ
MC: 50 - 550 Ω variable, 47k Ω fixed

Output impedance
Unbalanced: <100Ω
Balanced: < 100 Ω per leg

Input Capacitance
150pF

Input sensitivity at 1 kHz
MM: 4mV for 1V output
MC: 600µV for 1V output

Total gain
MM: 48dB
MC: 64dB

XLR pin identification
1 = Ground (Shield)
2 = Positive
3 = Negative (Return)

AC Power Requirements
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. (8.6kg)
Shipping: 26 lbs. (11.8kg)

Rack mount accessory
HRA 2 (may be purchased separately)