Parasound JC3 Jr Phono Pre-Amplifier

The Halo JC3Jr phono preamplifier offers high-performance phono preamplification for vinyl enthusiasts. With its discrete Class A input stage, it ensures exceptional audio quality and accuracy. The dual-mono design further enhances channel separation and sonic performance. The balanced XLR and unbalanced RCA inputs provide flexibility in connecting turntables. The precision RIAA equalization guarantees precise playback of vinyl recordings. The phono preamplifier supports both MM and MC cartridges, catering to a wide range of vinyl enthusiasts. Experience high-performance phono preamplification with the Halo JC 3 Jr.

Phono preamplifier
- Discrete Class A input stage
- Dual-mono design
- Balanced XLR and unbalanced RCA inputs
- Precision RIAA equalization
- MM/MC cartridge compatibility

Features

• 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)

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)