Parasound Halo A21+ Power Amplifier
SKU: 88284032757

Parasound Halo A21+ Power Amplifier

Sale price$3307.50 Regular price$3675.00
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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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Elisa's Mom
Belleville, US
★★★★★ 5
Excellent early math book
Format: Paperback
I found this book on a recommended Early Math reading list posted on the PBS Parents website. Since there are no words in this book, there is nothing to actually read to your child. But it is likely one of the longest 12 page books I've read. And it is by far the most significant number book my 3 year old has read. Anno uses a town to depict and define numbers 0-12, the seasons, and the months of the year. The seasons and months are recognizeable, but not the focus like the numbers are. For the number 0, you see a blank landscape with a small river. When the child turns the page, he sees a large number 1 on the right side of the book and in the landscape one lone building, one tree, one sun, one snowman.... There is also a set of blocks on the left side of the book, with one block colored in. Thus, the child can see the number 1 represented as a numeral, as a block (of a set of 10), and as an object (one building, one tree, one person). As you turn the pages and the numbers increase, a village forms. The final page is the number 12 -- a full village at Christmas time, complete with 12 reindeer in the sky. As a parent, I enjoy having my daughter "read" to me. But I am most amazed by how the book has helped her to grasp the concept of numbers. As she explained, "0, Mommy. Because there's nothing there."
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Reviewed in the United States on March 1, 2009
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Tenormary
Birmingham, US
★★★★★ 5
Great way to remove dry skin while not being abrasive
Style: Bath & Body
One side of the scrubber is a softer cloth, the other is a more abrasive cloth. There is a sponge divider between the two. This is great to use during the dry days of winter when my skin becomes dryer and more scaly. The soft side is for my face, of course. The ribbon band across the back lets me slide my hand in and get a bit more leverage and to hold on to the scrubber. Much kinder to my skin than a loofah. I wash the Scrubber with the towels so it is always clean.
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Reviewed in the United States on January 15, 2026
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GiGi
Whiting, US
★★★★★ 5
A nicer loofah
Style: Bath & Body
So nice! The two different sides is a plus. Soaps up easily and rinses out great. Makes for a pleasant shower everytime.
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Reviewed in the United States on March 28, 2026
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Megan
Fort Morgan, US
★★★★★ 5
A Self-Care Essential
Style: Bath & Body
I love these scrubbies! They’re a good size, and durable. One side is soft, and the other exfoliates. It has a little loop on top to hang it up. They are a bit pricey though.
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Reviewed in the United States on August 27, 2025
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Adriana
Natrona Heights, US
★★★★★ 5
Good quality items from thai brand
Style: Bath & Body
I am satisfied with this brand. Convenient and good quantity product.
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Reviewed in the United States on April 10, 2026

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