JC 5 Stereo Power Amplifier by John Curl Halo

• 400 watts x 2 @ 8 Ω RMS, both channels driven
• 600 watts x 2 @ 4 Ω RMS, both channels driven
• 1200 watts x 1@ 8 Ω, in bridged mode
• Circuitry designed by legendary John Curl
• Ultra-high bias Class A/AB operation
• 12 watts per channel of pure Class A power
• 90 amperes peak current per channel
• Stable with speaker impedance dips to 1.5 Ω
• Balanced inputs with discrete circuits
• CHK Infinium, custom 5-way speaker binding posts
• Neutrik locking XLR input connectors
• Vampire gold-plated RCA input & loop output jacks
• Direct-coupled signal path, no capacitors or inductors
• DC Servo and relay protection circuits
• AC turn-on inrush surge protection with relay bypass
• Dual-mono input stages with ±110 volt DC rails
• JFET input stage, MOSFET driver stage
• 24 beta-matched 15 ampere, 60 MHz bipolar output transistors
• 1.7 kVA shielded toroid power transformer with independent windings for each channel
• Independent power supplies for left & right channel input stages, driver stages, output stages
• 8,880 µF Nichicon Gold Tune filter capacitors for input stages
• 132,000 µF Rubycon filter capacitors for output stages
• Full power is rated all the way down to 5Hz for unrestricted low-end bass
• Harris hyper-fast soft-recovery bridge diode rectifiers
• 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

JC 5

FeaturesSpecsReviewsSupport

Power Output – Both Channels Driven
400 watts x 2, 8 Ω
600 watts x 2, 4 Ω

Power Output – Bridged Mode
1200 watts x 1, 8 Ω
Bridged 4 Ω operation is not recommended

Power measurement parameters are at 120 VAC:
0.05% THD, RMS continuous power,
full audio band (20 Hz - 20 kHz)

Current Capacity
90 amps peak, per channel

Slew Rate
> 130 volts per microsecond

Frequency Response
5 Hz - 100 kHz, +0/-3 dB
20 Hz - 20 kHz, +0/-0.25 dB

Total Harmonic Distortion (THD)
< 0.05 % at full power
< 0.03 % at typical listening levels

IM Distortion
< 0.04 %

TIM
Unmeasurable

Inter-channel Crosstalk
> 87 dB at 1 kHz
> 72 dB at 20 kHz

Input Impedance
Unbalanced: 33 kΩ
Balanced: 66 kΩ,(33 kΩ per leg)

Total Gain
29 dB

Input Sensitivity for 28.28 V Output into 8 Ω
Unbalanced: 1 V
Balanced: 1 V per leg

S/N Ratio
> 116 dB, input shorted, IHF A-weighted
> 111 dB, input shorted, unweighted

Damping Factor
1000 at 20 Hz

DC Trigger Requirements
+9 Vdc to +12 Vdc, 5 mA

Audio Trigger Requirements
2 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
73 lb. (33.1 kg)

Shipping Weight
90 lb. (40.8 kg)

Power Requirement
Standby: 1 Watt
Idle (no music playing): 225 Watts
Typical listening levels: 400 Watts
Maximum: 1500 Watts