JCM250 by John Curl and 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. Experience unparalleled compact power and fidelity with the Halo JCM250 mono power amplifier.
Specifications
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 (Gain switch set to normal)
- Unbalanced: 1V
- Balanced: 1V per leg
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)
ShippingWeight 50 lbs (22.6 kg)
PowerRequirement
- 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
