AI-generated product photo — not official manufacturer imagery.
AmplifiersPower Amplifiers
Estimated price (community-sourced)
$2,250 - $5,000
Around — community and catalog average, updates slowly
About the Halo A 21
The Parasound Halo A 21 is a reference-grade stereo power amplifier delivering 250 watts per channel into 8Ω (400W into 4Ω) with high-bias Class A/AB operation. Designed for audiophile systems, it features direct-coupled circuitry without signal-path capacitors, balanced XLR and unbalanced RCA inputs, and robust construction with THD of 0.2% at full power. Later upgraded to the A 21+ model with 300Wpc (8Ω), 500Wpc (4Ω), and improved specifications.
Specifications
Key Specifications
Power: 300W
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