- Home theater bypass enables seamless blending into a digital surround system
- Home theater bypass functions with both unbalanced & balanced inputs and outputs
- Home theater bypass function can be assigned to any input
- Bypass remains selected after unit has been turned off
- Improved remote control is included with the bypass assignment keys
- Specifications and sonic performance are 100% the same as the original JC 2
- 6 pairs unbalanced RCA line-level audio input jacks
- 2 input pairs can be switched to XLR balanced connectors
- Independent balanced/unbalanced select for the L & R channel
- Each channel's input is switched by its own gold-on-silver contact relay
- 4 output jack pairs with specialized functions:
- 1 Main output jack pair is balanced XLR, polarity is switched by remote
- 1 Main output jack pair is unbalanced RCA, polarity is switched by remote
- 1 output jack pair is unbalanced RCA, inverted polarity only
- 1 output pair is unbalanced RCA, normal polarity, fixed level for recorders
- Dual-mono left & right channel circuit boards minimize crosstalk
- Hand-matched complementary FETs
- Direct DC servo-coupled, no capacitors in the signal path
- Premium 4-gang motor-driven analog master volume control
- Separate TKD brand analog gain controls for L & R channel
- 3/8" thick aluminum shielding around audio boards
- Shielding prevents noise from power supplies & control circuits
- Separate output jacks for simultaneous normal & non-inverting polarity
- Aluminum chassis rear panel
- Remote control polarity switching uses gold-on-silver contact relays
- Vampire brand 24k gold-plated RCA jacks
- Neutrik brand premium XLR connectors
- Canare brand internal wiring
- High capacity R-core audio power transformer & inductor
- Hyper-fast soft recovery audio bridge rectifiers diodes
- Independent power supply for controller, relay coils, triggers, LEDs
- Remote control handset controls all functions
- Discrete IR codes for remote control
- Four 12v trigger output jacks for power amp auto turn-on:
- Two 12v trigger jacks are switched by the remote handset
- Two 12v trigger jacks are live when the JC 2 is turned on
- Two-way RS-232 serial port connection
- Line level inputs only; no inputs for phono
- Audio mute is switched by independent L & R relays
- Rear panel IR repeater input & loop out jacks
- Premium detachable heavy gauge IEC AC cord
- 2 6' (2m) trigger wires included
- Remote handset also controls Parasound Halo T 3 Tuner
Frequency Response
5 Hz - 100 kHz, +0/-3 dB
Distortion
THD: < 0.003% at 100 Hz
THD: < 0.005% at 20 kHz
IM: < 0.003%
S/N Ratio
> 116 dB, input shorted, IHF A-weighted
> 104 dB, input shorted, unweighted
Crosstalk
> 100 dB at 10 kHz
> 90 dB at 20 kHz
Gain
14 dB, maximum
L, R Gain Control Range
- 10 dB
Input Impedance
Unbalanced: 30k ohms
Balanced: 30k ohms per leg
Output Impedance
Unbalanced: < 60 ohms
Balanced: < 60 ohms per leg
Input Sensitivity
200 mV for 1 V output
Total Gain: 14 dB
Maximum Output: 8 V
XLR Pin Identification
1 = Ground (Shield)
2 = Positive
3 = Negative (Return)
AC Power Requirement
110 - 120 V or 220-240 V, 50 - 60 Hzs
(Set AC Voltage switch on rear panel)
25 watt standby; 30 watts when turned on
Dimensions
Width: 17 1/4" (437 mm)
Depth: 16" (406 mm)
Height, with feet: 5 7/8" (150 mm)
Height, without feet: 5 1/4" (133 mm)
Weight
Net: 24 lbs. (11 kg)
Shipping: 36 lbs. (16.4 kg)
Rack Mount Accessory
HRA 3 (May be purchased separately)
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
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