The JC1+ Story: Engineering Excellence for Audiophiles
The JC1+ isn't just an amplifier; it's a statement of Parasound's commitment to audio excellence. This amplifier delivers an uncompromising audio experience that audiophiles worldwide will appreciate for years to come.
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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 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
- 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
Power Output: 450 x1 watts @ 8Ω, 850 x1 watts @ 4 Ω, 1300 x1 watts @ 2 Ω
Power measurements are with 120VAC: 0.15% THD, RMS continuous power,full audio band (20Hz - 20kHz)
Class A Power Output: 25 Watts bias switch set to high, 10 Watts bias switch set to low
Current Capacity: 180 amps, peak
Slew Rate: > 130 volts per microsecond
Frequency Response: 2Hz-120 kHz +0/-2 dB, 20Hz-20kHz, +0/-0.25 dB
Total Harmonic Distortion (THD): < 0.15 % at full power, < 0.02 % at typical listening levels
IM Distortion: < 0.03 %
TIM: Unmeasurable
Damping Factor: > 1200 at 20 Hz
Input Impedance: Unbalanced: 50 kΩm Balanced: 100 kΩ, (50 kΩ per leg)
S/N Ratio, inputs shorted
- >122 dB, IHF A-weighted, bias set to Low
- >120 dB, IHF A-weighted, bias set to High
- >113 dB, Unweighted, bias set to Low
- >111 dB, Unweighted, bias set to High
Total Gain: 29 dB (Gain switch set to normal), 23 dB (Gain switch set to low)
Input Sensitivity for 28.28V Output into 8Ω (Gain switch set to normal)
- Unbalanced: 1 V
- Balanced: 1 V per leg
DC Trigger Requirements: +9 Vdc to +12 Vdc, 5 mA
Audio Trigger Requirement: 2.5 mV - 10 mV
XLR Pin Identification: 1 = Ground (Shield), 2 = Positive, 3 = Negative (Return)
Dimensions
- Width: 17-5⁄8" (448 mm)
- Height without feet: 7-1⁄8" (181 mm)
- Height with feet: 7-3/4" " (197 mm)
- Depth: 20" (508 mm)
- Depth with cables: 21-1⁄2" (546 mm)
Net Weight: 83 lb. (37.6 kg)
Shipping Weight: 107 lb. (45.4 kg)
Power Requirements
- Standby: <1 Watt
- Idle (bias set to low): 145 Watts
- Idle (bias set to high): 275 Watts
- Typical Listening levels: 400 Watts
- Maximum: 1500 Watts