Changes from the JC 1 → 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