SKU: 88284032757

Parasound Halo A21+ Power Amplifier

Sale price$3307.50 Regular price$3675.00
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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20

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Description

Parasound Halo A21+ Power AmplifierHalo A21+ Power You Can Feel, Control Youll Love The Parasound Halo A21+ delivers commanding power with effortless musicality. At 300 W per channel into 8 (500 W into 4 ), and up to 1,000 W bridged, it drives any loudspeaker with authority while keeping the sound spacious, controlled, and fatigue free. Based on legendary John Curls circuit design, the A21+ refines Parasounds most celebrated power amp for todays systemsblending raw performance with

Halo A21+ — Power You Can Feel, Control You’ll Love


The Parasound Halo A21+ delivers commanding power with effortless musicality. At 300 W per channel into 8 Ω (500 W into 4 Ω), and up to 1,000 W bridged, it drives any loudspeaker with authority while keeping the sound spacious, controlled, and fatigue-free.

Based on legendary John Curl’s circuit design, the A21+ refines Parasound’s most celebrated power amp for today’s systems—blending raw performance with elegant simplicity. Balanced XLR and RCA inputs, 2 Ω stability, and flexible bridging make it an ideal match for both stereo and home theater setups.

Praised by audiophiles and reviewers alike:

  • “The soundstage just bloomed. Bass is crisp… mids and highs are singing.”
  • “Ridiculously high damping… bass is tight and controlled at all volumes.”
  • “Delightful and satisfying from the first note… impossible to fault.”

Winner of multiple awards and recommendations, including:

  • Secrets of Home Theater & High Fidelity  Best Stereo Power Amplifier (2024)
  • Stereophile  Recommended Component 
  • Future Audiophile – "Best Affordable Audiophile Power Amp"

Specifications: 

Power Output – Stereo Mode (0.1% THD)
300 watts x 2, 8 Ω both channels driven
500 watts x 2, 4 Ω both channels driven

Power Output – Bridged Mode (0.1% THD)
1000 watts x 1, 8 Ω
Bridged 4 Ω operation is not recommended

Power measurement are at 120 VAC:
0.1% THD, RMS continuous power,
full audio band (20 Hz - 20 kHz)

Current Capacity
60 amps peak, per channel

Slew Rate
> 130 volts per microsecond

Frequency Response
5 Hz - 100 kHz, +0/-3 dB
20 Hz - 20 kHz, +0/-0.25 dB

Total Harmonic Distortion (THD)
< 0.1 % at full power
< 0.03 % at typical listening levels

IM Distortion
< 0.04 %

TIM
Unmeasurable

Inter-channel Crosstalk
> 80 dB at 1 kHz
> 70 dB at 20 kHz

Input Impedance
Unbalanced: 33 kΩ
Balanced: 66 kΩ,(33 kΩ per leg)

Total Gain
29 dB

Input Sensitivity for 28.28 V Output into 8 Ω
Unbalanced: 1 V
Balanced: 1 V per leg

S/N Ratio
> 115 dB, input shorted, IHF A-weighted
> 110 dB, input shorted, unweighted

Damping Factor
> 1100 at 20 Hz

DC Trigger Requirements
+9 Vdc to +12 Vdc, 5 mA

Audio Trigger Requirements
2 mV - 10 mV

XLR Pin Identification
1 = Ground (Shield)
2 = Positive
3 = Negative (Return)

Dimensions
Width: 17-5/8" (448 mm)
Height without feet: 7-1/8" (181 mm)
Height with feet: 7-3/4" " (197 mm)
Depth: 20" (508 mm)
Depth with cables: 21-1/2" (546 mm)

Net Weight
71 lb. (32.2 kg)

Shipping Weight
88 lb. (39.9 kg)

Power Requirement
Standby: 1 Watt
Idle (no music playing): 160 Watts
Typical Listening levels: 300 Watts
Maximum: 1400 Watts

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: 88284032757

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4.4 ★★★★★
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NikkiB
Natrona Heights, US
★★★★★ 5
Overpriced but it works.
Size: 1.3 Fl Oz (Pack of 1)
I hate that I love this product. It's stupid expensive. But it's great for broken/damaged/recovering skin. I've used it post microneedling and it is the only thing that soothes, hydrates, and doesn't sting raw, red skin. Great for rashes/hives and allergic reactions too. Luckily a thin layer is often enough to do the trick. so it lasts a long time I wouldn't use for everyday moisture, but when your skin is angry, this stuff works. (Overpriced? Yes. Witchcraft? Maybe. Does it work? Yep.)
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Reviewed in the United States on December 10, 2025
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English farmhouse
West Palm Beach, US
★★★★★ 5
Works wonder
Size: 1.3 Fl Oz (Pack of 1)
Amazing product. The scars from my daughter acne are mostly gone after 1 month. We will purchase again
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Reviewed in the United States on February 27, 2026
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Minnie B.
Lexington, US
★★★★★ 5
Extremely effective product
Such a great product. Really works well on chapped, dry hands during winter or to maintain healthy skin in other conditions. There really isn't a scent, it smells kind of plastic-y but that's fine with me when the results are so good. Hard to find in my area, so happy Amazon carries this brand.
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Reviewed in the United States on March 17, 2025
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Beluga
Los Angeles, US
★★★★★ 5
Just what I was looking for!!
So far,so good. It s the first time I have been trying this product. I really like it. I was looking for something to help me for dryness due to the cold weather and excess of hand washing because of my job. I work in a microbiology lab, so I am costantly washing my hands and they tent to get dry with the specific soap we have to use. I like to feel my hands humected but not sticky. I tried several brands but never got quite convinced to by a brand again because I as not satisfied at all. This hand cream is ligher compared to many others but really protects and leaves your hands soft. You use it once or twice a day and they are still soft.
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Reviewed in the United States on March 4, 2018
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Vanessa Colón
Louisville, US
★★★★★ 5
Cicalfate hand
Se absorbe súper bien y no te deja grasosa la piel
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Reviewed in the United States on May 26, 2026

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