Parasound Phono preamplifiers
JC3+ Phono Preamplifier
$4,500.00
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
Parasound JC3+ Phono Preamplifier Specifications
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, unweightedSignal 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 legInput
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)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)
JC3 jr. Phono preamplifier
$2,350.00
Circuitry designed by legendary John Curl
Circuit board layout by Carl Thompson
Cartridge options for 47k Ω 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
Incredible S/N up to 94 dB and THD less than 0.02%
Vishay-Dale resistors in the audio path
Aluminum shield separates power supply and audio circuits
Shielded toroid power transformer
High speed-soft recovery bridge rectifiers and common mode inductors
Vampire brand 24k gold-plated RCA jacks
Neutrik brand locking balanced XLR outputs connectors
Compact 1U chassis (2.5″ high with feet)
Available in silver or black
Parasound JC3 jr. Phono Preamplifier 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) 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)
Keep In Touch