Parasound JCM250 Monoblock Amplifier – Parasound

The Halo JCM250 is an uncompromising mono power amplifier that sets new standards in power and fidelity. With 250 watts at 8 Ω up to 800 watts at 2 Ω, it delivers exceptional audio performance. The balanced XLR and unbalanced RCA inputs ensure compatibility with various audio sources. Its dual-mono design with two transformers provides exceptional channel separation and sonic accuracy. The direct-coupled design, without capacitors in the signal path, preserves signal integrity and enhances transparency.

Product Details:

• Circuitry designed by legendary John Curl
• Ultra-high bias Class A/AB operation
• 5 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
• 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
• 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
• 2 rack space chassis with rear carry handles
• Power Output
• 250 watts@8 Ω
• 450 watts@4 Ω
• 800 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
• 8 Watts, bias set to high
• 4 Watts, bias set to low
• Current Capacity
• 100 amps, peak
• Slew Rate
• > 130 volts per microsecond
• Frequency Response
• 2 Hz – 110 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
• Input Impedance
• Unbalanced: 50 kΩ
• Balanced: 100 kΩ, (50 kΩ per leg)
• S/N Ratio, inputs shorted
• >120 dB, IHF A-weighted, bias set to Low
• >118 dB, IHF A-weighted, bias set to High
• >110 dB, Unweighted, bias set to Low
• >108 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 into 8Ω
• Unbalanced: 1V
• Balanced: 1V 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
• Width: 17.25″ (437 mm)
• Height without feet: 3.5″ (89 mm), 2U
• Height with feet: 4.125″ (105 mm)
• Depth: 20″ (508 mm)
• Depth with cables: 21.5″ (546 mm)
• Net Weight
• 42 lbs (19.1 kg)
• Shipping Weight
• 50 lbs (22.6 kg)
• Power Requirement
• Standby:<1 Watt
• Idle (bias set to low): 125 Watts
• Idle (bias set to high): 240 Watts
• Typical Listening levels: 300 Watts
• Maximum: 800 Watts

What to expect in the box:

• JCM250 Monoblock Amplifier
• Rack mount hardware

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