Parasound Halo A51 Amplifier
SKU: 53882018338

Parasound Halo A51 Amplifier

Sale price$3307.50 Regular price$3675.00
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

Parasound Halo A51 AmplifierBring the Cinematic Experience Home Add the A51 to your home theater and watchor listeneverything transform. This fivechannel 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 highbias Class A AB in a directcoupled topology for maximum clarity. It delivers 250 W x5 into 8 (400 W x5 into 4 ) with THX Ultra2 certification, fed by

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

Specifications: 

Power Output - All Channels Driven

250 watts RMS x 5, continuous, 20 Hz - 20 kHz 8Ω
400 watts RMS x 5, continuous, 20 Hz - 20 kHz, 4Ω

Current capacity:
60 amperes peak per channel

Power bandwidth:
5 Hz - 100 kHz, +0/-3 dB at 1 watt

Total harmonic distortion:
< 0.2 % at full power

IM distortion: balanced 16 V rms
< 0.04 %

Slew rate:
> 130 V/µsecond

Dynamic headroom:
> 1.5 dB

Interchannel crosstalk:
> 78 dB at 1 kHz;
> 63 dB at 20 kHz

Input sensitivity:
1 V for 28.28 V, THX Reference Lev

Input impedance:
47 k Ω unbalanced; 94 k Ω balanced

S/N ratio:
112 dB, input shorted, IHF A-weighted

Damping factor:
> 1100 at 20 Hz

Voltage:
110V - 120V

Dimensions:
17-1/2" w x 7-5/8" h x 20" d, 7" h without feet

Net weight: 80 lb.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 53882018338

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Majestic
Battle Creek, US
★★★★★ 3
Although it was a quality made shirt, not happy with the fit and style.
Size: X-Large, Color: Grey Stripe
Order this in an XL size for my son-in-law for Xmas. He isn't overally big, but likes the XL size for a little more roominess. After Xmas he tried it on. Although it was a quality made shirt, he wasn't happy with the fit and style. A no hassle return.
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Reviewed in the United States on February 23, 2026
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Tommy Wong
Lexington, US
★★★★★ 5
Good fit and quality
Size: Medium, Color: Burgundy 09
Loved this comfortable shirt, the look quality and fit are perfect with zero fade after a few uses, just to give you an idea of how much I liked it I've already ordered two more shirts.
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Reviewed in the United States on April 21, 2026
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Tucker
Lowell, US
★★★★★ 5
The black shirt
Size: Small, Color: Black 09
Great fit, wrinkle resistant worth your money. Very very comfortable, quality outstanding. Durable most definitely
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Reviewed in the United States on April 18, 2026
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Megan Kuntz
Phoenix, US
★★★★★ 4
Nice shirt, Fabric is revealing
Size: 3X-Large, Color: Teal 09
Beautiful shirt. Color is lovely. The material, however does reveal any bumps, lumps, or hair you may have on your skin, even with appropriate sizing. I don't think sizing up would help. Very smooth, stretchy material. Comfortable to wear.
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Reviewed in the United States on June 16, 2025
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Kris10
New York, US
★★★★★ 5
Great feel and comfort
Size: X-Large, Color: Red 09
Great shirt for work and play. Lightweight and Wrinkle resistant. Very comfortable to move around. Son loves the collar style. Fit him perfectly 6’1 and 235.
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Reviewed in the United States on January 14, 2026

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