Features 

  • 180 watts RMS x 5 @ 8 Ω
  • 255 watts RMS x 5 @ 4 Ω
  • 225 watts RMS x 2 @ 8 Ω
  • 350 watts RMS x 2 @ 4 Ω
  • Class A/AB circuitry designed by legendary John Curl
  • Direct coupled - no capacitors or inductors in audio path ensures the cleanest signal
  • Balanced XLR inputs with discrete circuits
  • Full power is rated all the way down to 5Hz for unrestricted low-end bass
  • Custom 1.5 kVA encapsulated toroid power transformer with independent secondary windings for each channel
  • Hand-matched JFETs for input stage
  • Hand-matched MOSFETs for driver stage
  • Beta-matched 15 amp, 60 MHz bipolar output transistors (3 pairs per channel)
  • 100,000 µF power supply filter capacitance
  • DC Servo and relay protection circuits
  • Auto turn on by audio signal or 12V trigger
  • Heavy-duty 24k gold-plated, 5-way speaker terminals
  • 3U chassis with updated cosmetics, rack mountable with HRA3 (sold separately)

Parasound Halo A52+ Five Channel Power Amplifier

C$4,250.00Price
  • Power Output - All 5 Channels Driven
       180 watts x 5, 8 Ω
       255 watts x 5, 4 Ω

     

    Power Output - 2 Channels Driven
       225 watts x 2, 8 Ω
       350 watts x 2, 4 Ω

     

    Power measurements parameters with 120VAC
       0.05% THD, RMS continuous power,
       full audio band (20 Hz - 20 kHz)

     

    Current Capacity: 45 amperes peak, per channel

     

    Dynamic Headroom: >1.5dB

     

    Slew Rate: > 130 volts per microsecond

     

    Frequency Response
       5 Hz - 100 kHz, +0/-3 dB
       20 Hz - 20 kHz, +0/-0.3 dB

     

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

     

    IM Distortion: < 0.04 %

     

    TIM: Unmeasurable

     

    Interchannel Crosstalk
       > 78 dB at 1 kHz
       > 63 dB at 20 kHz

     

    Input Impedance
       Unbalanced: 47 kΩ
       Balanced: 94 kΩ, 47 kΩ per leg

     

    Input Sensitivity for 28.28 V Output into 8 Ω
       Unbalanced: 1 V
       Balanced: 1 V per leg
       Total Gain: 29 dB

     

    S/N Ratio
       > 112 dB, input shorted, IHF A-weighted
       > 102 dB, input shorted, unweighted

     

    Damping Factor: > 1100 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: 17-1/4" 
       Height without feet: 5-1/4" 
       Height with feet: 5-7/8" 
       Depth: 20" 
       Depth with cables: 21-1/4" 

     

    Net Weight: 55 lbs. (25 kg)

     

    Shipping Weight: 69 lbs. (31.3 kg)

     

    Power Requirement
       Standby: 1 Watt
       Idle : 125 Watts
       Maximum: 1500 Watts