Parasound Halo A 21+ Power Amplifier
Best high-performance amplifier for driving demanding, power-hungry audiophile speakers.
This is a powerhouse built for those who demand absolute authority over their speakers. It trades a compact footprint for massive, high-current delivery that brings even the most stubborn drivers to life with effortless, surgical precision.
$5000.00
at
Audio Advisor
Who it's for
- Audiophiles driving power-hungry, low-impedance speaker systems
- Listeners seeking transparent, high-fidelity sound reproduction
- System integrators building complex, high-end home audio setups
Who should skip it
- Users with limited rack space or restricted shelf capacity
- Owners with enclosed cabinets lacking proper airflow
- Budget-conscious buyers prioritizing value over reference-grade performance
Performance breakdown
Power Delivery
Massive current reserves drive even the most difficult speaker loads effortlessly.
Sonic Transparency
Direct-coupled signal path preserves every nuance of the original recording.
Build Integrity
Over-engineered chassis and components ensure decades of reliable, heavy-duty performance.
Low-End Authority
Robust power supply delivers deep, controlled, and punchy bass response.
System Versatility
Bridgable mono mode and rack-mount options fit diverse high-end setups.
Signal Purity
Exceptional signal-to-noise ratio ensures a silent background for critical listening.
Key Specs
Power Output (8 Ohm)
300 W per channel
Power Output (4 Ohm)
500 W per channel
Power Output (1 Ohm)
1,000 W per channel
Bridged Power Output (1 Ohm)
1,000 W
Peak Current
60 A per channel
Frequency Response
5 Hz - 100 kHz
Total Harmonic Distortion
< 0.1%
Signal to Noise Ratio
> 112 dB
Input Impedance
66 kΩ (Balanced), 33 kΩ (SE)
Gain
29 dB
What Reviewers Say
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