Parasound Halo A51 Amplifier

• Circuitry designed by legendary John Curl
• THX Ultra2 certified
• High bias Class A/AB operation
• Balanced inputs with discrete circuits and XLR connectors
• Direct Coupled - no capacitors or inductors in signal path
• Complementary MOSFET driver stage and JFET input stage
• 40 beta-matched 15 amp, 60 MHz bipolar output transistors
• 2.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel
• 164,000 μF power supply filter capacitance
• DC Servo and relay protection circuits
• AC present, channel status, high temperature indicators
• Heavy-duty 24k gold-plated 5-way speaker terminals
• Gold-plated RCA input jacks; ground lift switch
• Auto turn-on by 12v trigger or audio signal

SPECIFICATIONS

• Continuous power output:
  250 watts RMS x 5, 20 Hz - 20 kHz, 8 Ω, all channels driven 400 watts RMS x 5, 20 Hz - 20 kHz, 4 Ω, all channels driven
• Current capacity:
  60 amperes peak per channel
• Power bandwidth:
  5 Hz - 100 kHz, +0/-3 dB at 1 watt Total harmonic distortion: < 0.2 % at full power
• Slew rate:
  > 130 V/µsecond Dynamic headroom: > 1.5 dB
• Interchannel crosstalk:
  > 78 dB at 1 kHz; > 63 dB at 20 kHz
• Dimensions: 17-1/2" w x 7-5/8" h x 20" d, 7" h without feet
• Net weight: 80 lb