SKU: 53882018338

Parasound Halo A51 Amplifier

Sale price$3307.50 Regular price$3675.00
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 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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Catch22ge
Alexandria, US
★★★★★ 5
Captain loves it
So much easier to throw the ball. Pair with the three set of chuck-it balls. My parents can finally throw it far again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 6, 2025
J
Verified Purchase
Jeff
West Palm Beach, US
★★★★★ 5
Great for my small dog.
My dog love's playing fetch. Keeps hands from getting dirty. Can bounce ball higher off the ground.
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Reviewed in the United States on December 17, 2022
M
Verified Purchase
77mama77
Omaha, US
★★★★★ 3
Too small
I was expecting a smaller ball launcher that would still launch regular size tennis balls. Nope
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Reviewed in the United States on May 7, 2024
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william alley
Lowell, US
★★★★★ 5
Made for small dog
Do not get this size unless you have a very small dog.
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Reviewed in the United States on June 9, 2023
R
Verified Purchase
Ray
Dallas, US
★★★★★ 3
Wrong size
The description said that the chucker was compatible for regular size tennis balls, but it is only for smaller balls. So I never used it, returned to find a larger size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2024

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