JC1+ — Extreme Power, Extraordinary Finesse

The Parasound JC1+ delivers monoblock performance on a majestic scale—450 W into 8 Ω, over 1,300 W into 2 Ω, and up to 25 W in pure Class A. Whether it’s the intimate tones of solo piano or the thunder of orchestral crescendos, the JC1+ delivers every detail with uncanny control, space, and realism. Built on John Curl’s decades-long halo legacy, this amp raises the bar with rugged R-core power supply design, system tuning switches, and precision-grade audio components. Its transparent performance and refined execution make it ideal for high-resolution systems, audiophile-level home theaters, and demanding speaker pairings alike.

Changes from the JC1 to JC 1+

400 -> 450 Watts @ 8Ω

800 -> 850 Watts @ 4Ω

1200 -> 1300 Watts @ 2Ω

Filter capacitance: 132,000 -> 198,000 uF

Transformer capacity: 1.9 -> 2.1kVA

Output transistors: 18 -> 24 Sanken 60Mz devices

Peak current: 135 -> 180 amps

Weight: 64 -> 83 lbs net

Bybee Music Rails™ active high frequency noise filters

John Curl driver stage employs a new cascode circuit design

FR-408 input circuit board material improves HF signal integrity

Gain switch to select 29 dB or 23 dB gain

R-core power transformer for input stage Input circuit board is shielded

Double thickness copper on output/power supply circuit boards

Gold-plated internal audio signal path connectors

Custom CHK Infinium speaker binding posts Looping Neutrik XLR output for easier bi-amping

Front panel power indicator LED

Updated auto turn on circuit with5mm 12V trigger jacks

All Features: Circuitry designed by legendary John CurlUltra-high bias Class A/AB operation 25 watts of pure Class A power Stable with speaker impedance dips below 1Ω Bybee Music Rails™ - active high frequency filters for input stage New John Curl driver stage employs a cascode circuit for greater open loop bandwidth & superior linearity Gain switch to select 29 dB or 23 dB gain for optimum compatibility with high gain preamps or extremely efficient speakers R-core transformer for input stage suppresses noise on power line 6 massive 33,000 uF Nichicon Gold Tune filter capacitors for output stage 22,400 uF input stage power supply filter capacitors, independent of the main power supply Dual CHK Infinium, custom 5-way speaker binding posts for easy bi-wiring Neutrik locking XLR balanced input & loop output jacks Vampire 24k gold-plated RCA input & loop output jacks Direct-coupled signal path, no capacitors or inductors in the audio path JFET input stage, MOSFET driver stage 24 beta-matched 15 ampere, 230V, 60 MHz bipolar output transistors 1 kVA shielded toroid power transformer with premium H18 grade core Independent power supplies for input stage, driver stage & output stage Full power is rated all the way down to 2Hz for unrestricted low-end bass Harris hyper-fast soft-recovery bridge diode rectifiers REL & Nichicon Muse capacitors DC servo & relay protection circuits AC turn-on inrush surge protection with relay bypass Automatic turn-on by 12 V trigger or audio sensing 4 rack space chassis with rear carry handles Rack mount hardware is included Available in silver or black