Parasound HALO A51 5-channel
Bring the Cinematic Experience Home Add the A51 to your home theater and watch—or listen—everything transform. This five‑channel amp effortlessly boosts your AVR, powering your front and surrounds with clean, room-filling performance that punches well above its price. Designed by John Curl, the A51 runs high‑bias Class A/AB in a direct‑coupled topology for maximum clarity. It delivers 250 W x5 into 8 Ω (400 W x5 into 4 Ω) with THX Ultra2 certification, fed by a 2.2 kVA toroidal transformer and 164,000 µF of filter capacitance for clean current on demand. Balanced XLR and RCA inputs make it a drop‑in upgrade for any AVR/processor with pre‑outs. Praised by audiophiles and reviewers alike: “Midrange was totally seductive…with music, the A51 radiated sweetness and light. With action films, it rained thunder and lightning.” — Sound & Vision (Barry Willis) “Benchmark levels of performance at a reasonable price.” — Home Theater Review “More than capable of driving any speaker load…a true winner!” — Audioholics Covered by Parasound's 3-Year Parts & Labor Warranty. Terms effective September 1, 2026.
| Brand | Parasound |
| Model | HALO A51 5-channel |
| Channels | |
| Power per channel, 8 Ω (W) | |
| Power rated from (Hz) | |
| Power rated to (Hz) | |
| Power rated at THD (%) | |
| Power rated with channels driven | |
| Power per channel, 4 Ω (W) | |
| Bridged power, 8 Ω (W) | |
| Frequency response | |
| Total harmonic distortion (%) | 0.2 |
| Signal-to-noise ratio (dB) | 112 |
| Damping factor | 1100 |
| Input impedance (Ω) | 47000 |
| Gain (dB) | |
| Height (mm) | 194 |
| Width (mm) | 445 |
| Depth (mm) | 508 |
| Weight (kg) | 36.3 |