The Halo A 23+ was designed by engineer John Curl, who’s well known in audio circles, and since the 1990s has designed many amplifiers for Parasound. This RA number must be clearly marked on the outer carton only. Doing so has proved that extremely high performance-per-dollar is still possible today when a company leverages decades of experience, and is spearheaded by a legend… Anyone in the market for a stereo power amp would be well advised to consider the Parasound A 21+, especially those who believe that they must spend more. 16 beta-matched 15 ampere, 60 MHz bipolar output transistors. The Parasound A23 is a lousy amplifier. < 0.1 % at full power Damping factor: >l1100 @ 20Hz. +9 Vdc to +12 Vdc, 5 mA, Audio Trigger Requirements 750 Watt, 4 Ohm, "The A 21+ represents a new unparalleled value in amplifier performance. speakers output, Details like soundstage depth, focus, and texture is where the A 21+ puts real distance from the A 21. Additionally, Parasound's A21 just won an … The JC 5 is a 400-watt per channel stereo amplifier designed by John Curl that combines design Output Impedance / Channel. main. Those shopping for a stereo amplifier in this price range should give the A 21+ serious consideration. The Design of the Parasound Halo P 5 Preamplifier. 20 Hz - 20 kHz, +0/-0.25 dB, Total Harmonic Distortion (THD) 8 Ohm, 1, ! Harris hyper-fast soft-recovery bridge diode rectifiers. Parasound Halo jc1 or a21. This is helpful for those of us who employ "gain staging" to minimize overall system output noise and who wish to … Parasound Halo A21+ Stereo Power Amplifier 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 → Current capacity: 60 amperes peak per channel. Frequency Response. gain control, 250 Watt, ,1752'8&7,21 7kdqn 115 dB, input shorted, IHF A-weighted Its raw power is matched by elegant circuit design from audio guru John Curl in collaboration with CTC Builders. Output Power / Channel. ", Positive Feedback January 2019 "The new Parasound A 21+ was impossible to fault... remarkably powerful, transparent and quiet. 0.1% THD, RMS continuous power, Congratulations and Thank You for Choosing Parasound Your new Parasound Halo Series A 21 power amplifier presents the latest advancements ... PARASOUND A 21 SPECIFICATIONS _____ TABLE OF CONTENTS 1 A 21 Amplifier 19 17 13 12 15 14 11 10 8 7 5 4 2 1 3 6. Channel Type. I have a pair of B&W nautilus 802. (With a class-AB output stage, one-third power results in the maximum dissipation in the output devices.) < 0.03 % at typical listening levels, Inter-channel Crosstalk 0.03 %, THX Ultra2 certified, I have read very good things about that amp and am very happy with the A51 I … Parasound has chosen to take a staple core product that has remained an exceptional value for over fifteen years, the Halo A21 amplifier, and re-spin it into the Halo A21+. 5 years. It will be a perfect match for your speakers. 88,000 µF power supply filter capacitance. 1.3 kVA shielded toroid transformer w/ independent windings for each channel. audio output, RCA, Height without feet: 7-1/8" (181 mm) Question is, does the a21 sound as good as the jc1 (close is good - there is a reason the jc1 is 4 times as much) and will the a21 be able to drive the 802's. l bought the Parasound halo a21 and the differences of improvement in the sound quality are just unreal, it's like too good to be true, before the parasound i had an Emotiva XPA and after listened to the differences btw the emo and the parasound i got to the conclusion that emotiva made my speakers sounded so bad, the sound quality is night and day differences, I'm was shocked! 500 watts x 2, 4 Ω both channels driven, Power Output – Bridged Mode (0.1% THD) Unbalanced: 33 kΩ 125 Watt, 225 Watt, 400 Watt. Idle (no music playing): 160 Watts Independent power supplies for input stage, driver stage and output stage. full audio band (20 Hz - 20 kHz), Current Capacity 2 = Positive The A 21+ is exceptional and provided an awe-striking feel.". 2, 2, Depth: 20" (508 mm) With the assistance of legendary Audio Designer John Curl, they’ve created a beautiful and powerful successor to the A21, The A21+ stereo power amplifier. Sidebar 3: Measurements I tested the Parasound Halo A 21+ with my Audio Precision SYS2722 system (see the January 2008 "As We See It"). > 130 volts per microsecond, Frequency Response > 80 dB at 1 kHz trigger, RCA x 2, They currently have the 3b3 on sale for $5215.50 while the A21+ is $2995. main. Direct Coupled - no capacitors or inductors in signal path. 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