Parasound JC 1+

Multi Award winning mono amplifier by John Curl. Price is per mono amp. 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 SPECS: 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&quot; (181 mm) Height with feet: 7-3/4&quot; (197 mm) Depth: 20&quot; (508 mm) Depth with cables: 21-1/2&quot; (546 mm) Shipping Carton Dimensions Width: 29-1/2&quot; (750 mm) Depth: 27-1/2&quot; (700 mm) Height: 15-3/4&quot; (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