Parasound HALO A21
| Brand | Parasound |
| Model | HALO A21 |
| Channels | 2 |
| Power per channel, 8 Ω (W) | 250 |
| Power rated from (Hz) | 20 |
| Power rated to (Hz) | 20000 |
| Power rated at THD (%) | |
| Power rated with channels driven | 2 |
| Power per channel, 4 Ω (W) | 400 |
| Bridged power, 8 Ω (W) | |
| Frequency response | |
| Total harmonic distortion (%) | 0.2 |
| Signal-to-noise ratio (dB) | 112 |
| Damping factor | 1100 |
| Input impedance (Ω) | 33000 |
| Gain (dB) | |
| Height (mm) | 194 |
| Width (mm) | 445 |
| Depth (mm) | 508 |
| Weight (kg) | 27.2 |