Parasound Halo Series A 52+ Power Amplifier | 255W x 5 Channels

The Parasound Halo A 52+ is a five-channel power amplifier designed to anchor demanding home theater systems requiring consistent performance across every channel simultaneously. Housed in a 4U rack chassis measuring 17.25 by 5.25 by 20 inches and weighing 55 lbs net, it delivers 180 watts RMS per channel into 8 ohms and 255 watts RMS per channel into 4 ohms with all five channels operating at once.

Each channel draws up to 45 amps peak, and the amplifier holds total harmonic distortion to 0.05 percent RMS continuous across the full 20 Hz to 20 kHz audio band. Frequency response spans 5 Hz to 100 kHz within 3 dB. Signal-to-noise ratio exceeds 112 dB IHF A-weighted. Balanced XLR and unbalanced inputs are both accommodated, with a common 29 dB gain stage. Standby consumption is 1 watt with a maximum draw of 1,500 watts, and a 9-12 Vdc trigger input is provided for system control.

Key Features

• 180W RMS x 5 into 8 ohms, 255W RMS x 5 into 4 ohms, all channels driven
• 45 amps peak current per channel
• THD 0.05% RMS continuous, 20 Hz - 20 kHz
• SNR greater than 112 dB, IHF A-weighted
• Balanced XLR and unbalanced inputs, 29 dB gain
• 1W standby, 1,500W maximum power draw
• 4U chassis, net weight 55 lbs

Specifications

• Rack Spacing: 4U
• Channels: 5-Channel
• Watts Per Channel: 201-300W
• Power Output @ 8 ohm: 180W RMS x 5, 20 Hz - 20 kHz, 8 Ω, all channels driven
• Power Output @ 4 ohm: 255W RMS x 5, 20 Hz - 20 kHz, 4 Ω, all channels driven
• Power Output Bridged @ 8 ohm: n/a
• Power Consumption: Standby: 1W Idle: 125W Maximum: 1500W
• Current Rating: 45 amps peak, per channel
• Total Harmonic Distortion (THD): 0.05% THD, RMS continuous power, full audio band (20 Hz - 20 kHz)
• Power RMS: Yes
• Frequency Response: 5 Hz - 100 kHz, +0/-3 dB 20 Hz - 20 kHz, +0/-0.3 dB
• Audio Crosstalk: > 78 dB at 1 kHz > 63 dB at 20 kHz
• Impedance Input: Unbalanced: 47 kΩ Balanced: 94 kΩ, 47 kΩ per leg
• Audio Gain: 29 dB
• Sensitivity Input: Unbalanced: 1 V Balanced: 1 V per leg
• Signal to Noise Ratio: > 112 dB, input shorted, IHF A-weighted > 102 dB, input shorted, unweigh
• Amplifier Requirements: Audio Trigger: 2 mV - 10 mV
• External Trigger Voltage: +9 Vdc to +12 Vdc, 2 mA
• Connectors: XLR Pin Identification 1 = Ground (Shield) 2 = Positive 3 = Negative (Return)
• Dimensions (W x H x D): 17.25" x 5.25" x 20" (437 x 133 x 508mm) (without feet)17.25" x 5.88" x 20" (437 x 149 x 508mm) (with feet) Depth with cables: 21.25" (540mm)
• Weight: Net Weight: 55 lbs (25 kg)Shipping Weight: 69 lbs (31.3 kg)