Parasound A21+


Changes from the original A 21→A 21+

  • 250 → 300 Watts (8Ω)
  • 400 → 500 Watts (4Ω)
  • 750 → 1000 Watts (bridged)
  • Filter cap: 88,000 uF → 108,000 uF
  • S/N: 112dB → 115 dB
  • THD (at full power): 0.2% → 0.1%
  • Crosstalk (20kHz): 63dB → 70dB
  • Transformer size: 1.2 kVA → 1.3 kVA
  • Weight: 60 LB → 71 LB
  • Refined Halo cosmetic with aluminum end caps & gold highlights
  • Updated rear panel with heavy duty speaker terminals from JC 5
  • Upgraded internal gold on gold audio connections
  • Updated auto turn on circuit

All Features

  • 300 watts x 2 @ 8 Ω RMS, both channels driven
  • 500 watts x 2 @ 4 Ω RMS, both channels driven
  • 1000 watts x 1 @ 8 Ω, in bridged mode
  • Circuitry designed by legendary John Curl
  • High bias Class A/AB operation
  • 60 amperes peak current per channel
  • Stable with speaker impedance dips to 1.5 Ω
  • Balanced inputs with discrete circuits
  • CHK Infinium, custom 5-way speaker binding posts
  • Gold-plated RCA input & loop output jacks
  • Direct-coupled signal path, no capacitors or inductors
  • DC Servo and relay protection circuits
  • AC turn-on inrush surge protection with relay bypass
  • JFET input stage, MOSFET driver stage
  • 16 beta-matched 15 ampere, 60 MHz bipolar output transistors
  • 1.3 kVA shielded toroid transformer w/ independent windings for each channel
  • Independent power supplies for input stage, driver stage and output stage
  • 108,000 µF filter capacitors for output stages
  • Full power is rated all the way down to 5Hz for unrestricted low-end bass
  • Harris hyper-fast soft-recovery bridge diode rectifiers
  • Automatic turn-on by 12 V trigger or audio sensing
  • 4 rack space chassis with rear carry handles
  • Rack mount hardware is included
  • Available in silver or black


Fidelity-Online, Germany November 2019
“The lady of the house enters the scene, listens briefly and comments briefly and finally ‘Sounds like a concert, it can stay!’ You have to search for an amplifier that plays so completely and correctly for this price with the proverbial magnifying glass.”

The Audiophile Audition  October, 2019
“Massively Built! Buffed Out! You get a lot for your $$$$. What would you expect from Parasound? John Curl is a world-renowned electronics designer. The best bang for the buck for the music-minded customer.”

The Audio Beatnik August 2019
“You’ll be hard pressed to find another integrated amplifier at this price that can match the HINT 6’s impressive list of features, power, and smooth and engaging sound.”

Positive Feedback  June  2019
“San Francisco-based Parasound continues to recalibrate accepted price-vs-performance expectations in the high end. The HINT 6 consistently reproduced all manner of music with remarkable confidence, consistency, and grace. Pairing the HINT 6 to my beloved Maggie 1.7i panels proved downright revelatory.”

Stereophile May 2019
“The HINT 6 worked well with every speaker I threw at it. Absolutely breathtaking…exhilarating. I can’t think of another integrated amplifier that offers so many options and has such solid, generous sound. Recommended.”

Stereophile February 2019
“…brilliantly detailed Parasound.”

What HiFi (UK) December 2018
“This is a confident and enthusiastic amplifier that’s just fun to listen to.”

Pedido de informação