Name: Parasound JC1 Silver
SKU: 828845

After five years of development, the JC 1 monoblock amplifier from Parasound and designer John Curl has finally arrived. "Integrity Endures™" embodies Parasound's unwavering commitment to delivering high-quality, durable products without compromising on value. This guiding principle has been the key to their success, as seen when experiencing the full immersion of music. In 2016, Parasound celebrated their 35th anniversary by reaffirming their dedication to integrity and excellence with the motto "Integrity Endures," a testament to their enduring impact on the audio industry.

Key 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
Direct-coupled signal path, no capacitors or inductors in the audio path

Specifications:

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
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

Changes from the JC 1 to JC 1

Read the

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

General:

Power Output
450 x1 watts @ 8 Ω
850 x1 watts @ 4 Ω
1300 x1 watts @ 2 Ω

Power measurements are with 120 VAC:
0.15% THD, RMS continuous power,
full audio band (20 Hz - 20 kHz)

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
2 Hz - 120 kHz, 0/-2 dB
20 Hz - 20 kHz, 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 kΩ
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 28.28 V Output into 8 Ω
Unbalanced: 1 V
Balanced: 1 V per leg
(Gain switch set to normal)

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
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)

Shipping Carton Dimensions
Width: 29-1/2" (750 mm)
Depth: 27-1/2" (700 mm)
Height: 15-3/4" (400 mm)

Net Weight
83 lb. (37.6 kg)

Shipping Weight
107 lb. (48.5 kg)

Power Requirement
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