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Parasound HALO A52+ Power Amplifier
Description of the Parasound HALO A52+ Power Amplifier
The Parasound A52+ is a versatile five-channel amplifier, delivering 180 watts per channel at 8 ohms. Its high-current design ensures powerful, clear sound, making it ideal for multi-room audio setups or home theatres. The A52+ combines power, efficiency, and precision to bring out the best in your speakers, whether used in stereo, multi-channel, or surround sound configurations.
- Power Output: 180 watts per channel at 8 ohms
- Design: High-quality components with balanced XLR and unbalanced RCA inputs
- Features: Energy-efficient design for cool operation
- Applications: Suitable for versatile multi-channel setups and home theatre systems
The A52+ is the perfect blend of power and versatility, offering exceptional sound quality in both dedicated home theatres and multi-zone audio systems.
Features of the Parasound HALO A52+ Power Amplifier
- 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 the 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 the 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 of the Parasound HALO A52+ Power Amplifier
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 measurement 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″ (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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