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Frequently Asked Questions
How is the JC 3+ different from the JC 3?
- The JC 3+ has variable input impedance adjustments for MC cartridges.
- The JC 3+ R-core power transformer is 82% larger; 1A vs. 0.55A. This enables even greater
bass impact and authority.
- The JC 3+ power supply electrolytic filter capacitors are 47% larger; a total of 40,000uF vs.
27,200uF. These result in greater dynamic contrasts and a heightened sense of realism.
- The copper traces on each phono module's circuit board are 24k gold-plated for ultimate
conductivity. This results in even lower perceived background noise and additional
transparency.
Why won’t the JC 3+ turn on when I press the On-Off button?
- Check the setting of the Turn On Options switch. It must be set to Manual for the front panel
On-Off button to function.
Why won’t the JC 3+ turn on with an external DC trigger?
- Check the setting of the Turn On Options switch. It must be set to 12 V for the 12V trigger to
function.
Why is there no sound from the speakers?
- Check that AC is live and the “P” badge and both the On-Off button and Mono button are
illuminated.
- Check that input and output cables are secure at both ends.
I can hear a background hum from the speakers
- Make sure that you have attached your turntable’s ground wire to the ground terminal on the
back panel of the JC 3+
- Try changing the position of the Polarity Invert switch on the back panel of the JC 3+.
- Move audio cables and AC cords away from each other (while power is off).
- Try to route audio cables and AC cords perpendicular to each other (while power is off).
- Make sure insulating shoulder washers are used if unit is rack mounted.
- Ensure that the power amps and the JC 3+ are plugged into the same AC outlet.
-You might find that you need to attach the JC 3 Ground terminal to an audio ground on your
line level preamplifier. Contact Parasound Technical Service for specific instructions.
The sound is distorted and too loud
Are you using an MM cartridge while the JC 3+ input load switches are set to MC? Change
the settings to MM.
The sound is weak
Are you using an MC cartridge and the JC 3+ input load switches are set to MM? Change the
settings to MC Variable 50-550
Ω.
When should I use the AC Polarity Invert switch?
If you hear hum and you cannot eliminate it by moving your cables around.
Should I use Balanced XLR or Unbalanced RCA connections?
We generally recommend balanced connections if your preamplifier has balanced XLR inputs.
Recording and broadcast studios use balanced connections exclusively because balanced
interconnects have an inherent ability to reject noise and hum, even when components are far
apart and connected by long cables. Many high-quality preamplifiers include balanced input
connections with XLR jacks for the same reasons. The JC 3+’s balanced outputs enable you to
take full advantage of the inherent noise-rejection capability and superior sound quality of its
precision circuits. Many serious listeners prefer the sonic characteristics of balanced
connections because their lower inherent noise floor contributes to a more defined and
spacious soundstage.
