Parasound A 52+ Five Channel Power Amplifier

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Please call us at 416.821.4723 for pricing & availability or

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)

Specifications:

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
Total Gain 29 dB
Input Sensitivity for 28.28 V Output into 8 Ω Unbalanced: 1 V
Balanced: 1 V per leg
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" (437 mm)
Height without feet: 5-1/4" (133 mm)
Height with feet: 5-7/8" (149 mm)
Depth: 20" (508 mm)
Depth with cables: 21-1/4" (540 mm)
Net Weight 55 lb. (25 kg)
Shipping Weight 69 lb. (31.3 kg)
Power Requirement Standby: 1 Watt
Idle: 125 Watts
Maximum: 1500 Watts

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