Parasound JC 1+ Mono Amp by John Curl

Changes from the JC 1 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 → 2.1 kVA
• 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 of 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 circuits with 3.5mm 12V trigger jacks

All Features:

• Circuitry designed by legendary John Curl
• Ultra-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
• 2.1 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