full audio band (20 Hz - 20 kHz), Current Capacity "Highly Suitable for Driving Anything" Its raw power is matched by elegant circuit design from audio guru John Curl in collaboration with CTC Builders. Automatic turn-on by 12 V trigger or audio sensing. Halo has earned honors and awards that are unmatched. While I would like to buy the jc1 monoblocks they take up a ton of space. The A 21+ is exceptional and provided an awe-striking feel.". Although price isn’t indicative of which would be better, a 3b3 for only $400 more than the A21+ sounds like a better deal. > 130 volts per microsecond, Frequency Response 125 Watt, 225 Watt, 400 Watt. Specs on my XPA-1L's 250W @ 8 ohms/500W @ 4 ohms, Class A to 35watts. According to Parasound, the 3 o'clock setting means 20dB/26dB and the 12 o'clock setting means 10dB/16dB for single-ended/ balanced inputs, respectively. gain control, 250 Watt, It has enough power to drive almost any speaker you can buy for under $10,000. Channel Type. Total harmonic distortion: < 0.2 % at full power. > 80 dB at 1 kHz They currently have the 3b3 on sale for $5215.50 while the A21+ is $2995. 1 = Ground (Shield) Parasound and John Curl, their primary design consultant for the past 30 years, targeted power supply transformers and filter capacitors as the foundation for power output increases. Direct Coupled - no capacitors or inductors in signal path. Those shopping for a stereo amplifier in this price range should give the A 21+ serious consideration. © 2021 CNET, A RED VENTURES COMPANY. Amplifier Output Details. XLR x 2, 750 Watt, 4 Ohm, Page 18: Technically Speaking 4 Ω load and a 4 Ω speaker appears as only a 2 Ω load. I have been fortunate to have Parasound gear in my reference system for many years, including the Parasound P 3 and the Parasound Halo A21 Amplifier. 2 = Positive auto power on/off, Parasound decided to update their already brilliant A 21 power amplifier which had become a staple for their brand for over 10 years. 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! parts, 10 years, Damping factor: >l1100 @ 20Hz. Discussion threads can be closed at any time at our discretion. 20 - 20000 Hz. Unbalanced: 33 kΩ Complementary MOSFET driver stage and JFET input stage. Independent power supplies for input stage, driver stage and output stage. I preconditioned the amplifier by operating it at one-third the specified power into 8 ohms for an hour. 108,000 µF filter capacitors for output stages. > 70 dB at 20 kHz, Input Impedance Parasound's Halo A21 two-channel power amplifier has the brute force you need for ultra-realistic musical reproduction and hair-raising movie soundtracks. Be respectful, keep it civil and stay on topic. 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… < 0.1 % at full power I don’t know where you are located but AudioAdvisor is a US online dealer for both Bryston and Parasound. ! XLR, 88 lb. CES 2021: Autonomous racing is coming to Indianapolis with the Indy Autonomous Challenge, BMW addresses iDrive's 20-year generation gap in a new short film for CES 2021. Frequency Response. Balanced: 1 V per leg, S/N Ratio "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." Parasound already brings listeners heavenly sound, but its halo now shines more beautifully than ever with its brand new version of the Halo A 23 two-channel power amplifier. banana/spade x 2, labor, 4 rack space chassis with rear carry handles. audio output, 1000 watts x 1, 8 Ω Halo A21 Two-Channel Amplifier. (With a class-AB output stage, one-third power results in the maximum dissipation in the output devices.) Parasound Halo jc1 or a21. Width: 17-5/8" (448 mm) Power output: 300Wpc into 8 ohms (24.8dBW), 500Wpc into 4 ohms (24dBW), 1000Wpc into 8 ohms (bridged) (30dBW). Bridged 4 Ω operation is not recommended 5 Hz - 100 kHz, +0/-3 dB 2, 2, Maximum: 1400 Watts, Stereophile March 2020 Power measurement are at 120 VAC: Continuous power output (20 Hz - 20 kHz): 250 watts RMS x 2 at 8 ohms, 400 watts RMS x 2 at 4 ohms, 750 watts RMS x 1 (bridged mono mode) at 8 ohms. Procedure for Returning Your A 21 to Parasound for Service If Parasound determines that you should send your A 21 to Parasound, you will be given a Return Authorization (RA) number. Depth: 20" (508 mm) 20 Hz - 20 kHz, +0/-0.25 dB, Total Harmonic Distortion (THD) 4 Ohm, 8 Ohm. 88,000 µF power supply filter capacitance. RCA, trigger, RCA x 2, Power Output – Stereo Mode (0.1% THD) As far as what the A21+ sounds like, that's anyones guess as I doubt many have heard it yet. Sidebar 3: Measurements I tested the Parasound Halo A 21+ with my Audio Precision SYS2722 system (see the January 2008 "As We See It"). The JC 5 is a 400-watt per channel stereo amplifier designed by John Curl that combines design The Parasound A23 is a lousy amplifier. The Design of the Parasound Halo P 5 Preamplifier. At first look the Parasound Halo A 21 and A 51 are appealing and robust amplifiers accented by brushed metal finish and a "Halo" aqua blue light around the power button. Parasound Halo, ZoneMaster, Z Custom, and NewClassic are four distinct product families. < 0.03 % at typical listening levels, Inter-channel Crosstalk Additionally, Parasound's A21 just won an … ", Home Theater Review Feb 2020 Current capacity: 60 amperes peak per channel. (39.9 kg), Power Requirement Parasound JC 5 Halo Stereo Power Amplifier A Chip Off the Old Monoblock Parasound's Halo JC 5 distills the essence of two Halo JC 1 monoblocks into a single-chassis stereo amp with outstanding sound quality, power, and value. 60 amps peak, per channel, Slew Rate I have read very good things about that amp and am very happy with the A51 I … i appreciate and respect all opinions so please feel to contribute. In fact I was in the process of reviewing the Thiel CS2.7 Floor-standing Speakers when the P 5 arrived. just wondering if the parasound halo a21 power amp can be bi amped with another halo 21 or a parasound classic 2250. for my front left and right monitor audio pl300s? But I believe the last time I looked a couple retailers of Parasound were selling the older and lighter (60lbs) A21 at a discount and that amp sounds fantastic. " 1, audio input, Parasound Halo A21+ Stereo Power Amplifier. main. gold plated connectors, Frequency response: 20Hz–20kHz, +0/–0.25dB; 5Hz–100kHz, +0/–3dB. 3 = Negative (Return), Dimensions Standby: 1 Watt "The A 21+ represents a new unparalleled value in amplifier performance. Details like soundstage depth, focus, and texture is where the A 21+ puts real distance from the A 21. Output Impedance / Channel. Height without feet: 7-1/8" (181 mm) 20 - 20000 Hz. 250 Watt, 400 Watt, 750 Watt. See all Halo … 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 → IMO the Vincent is a much better-sounding amplifier than the Parasound A21. 8 Ohm, 1, > 1100 at 20 Hz, DC Trigger Requirements Idle (no music playing): 160 Watts 1.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel. ALL RIGHTS RESERVED. +1 for John Curl’s linear design Parasound A21+ The Parasound A 21+ offers a lot of low-distortion power and isn’t fazed by impedance’s as low as 2 ohms.—John Atkinson Sounds like the MA gx300’s with ribbon tweeters need some grunt, judging by HiFi News and record Review "Bear in mind you will need a good amp to drive them." 400 Watt, But an amplifier is not just about cosmetics especially when considering that most Audio Enthusiasts seem more interested in sound quality and features. Halo is our premier line with a reputation for going head-to-head with the most expensive equipment on the market, while costing a fraction of the price. 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. Specs below. 300 watts x 2, 8 Ω both channels driven 250 Watt - 8 Ohm - 20 - 20000 Hz - THD 0.2% - 2 channels, 0.2 %, audio line-in, if so i would use the halo 21 for the LF(bass) and the slightly less powerful 2250 for the mid/treble. "The new Parasound A 21+ was impossible to fault... remarkably powerful, transparent and quiet. Nonetheless, it is still very much a Curl design, with his customary J-FET input stage, MOSFET driver stage, and beta-matched bipolar-transistor output stage—each arrayed in a complementary configuration, making for a more linear and lower distortion circuit. Voltage gain: 29dB, 8 ohms (unbalanced input). Channel Type. 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+. Height with feet: 7-3/4" " (197 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. balanced audio input, 2 mV - 10 mV, XLR Pin Identification 4 Ohm, 8 Ohm. Depth with cables: 21-1/2" (546 mm), Shipping Weight Harris hyper-fast soft-recovery bridge diode rectifiers. 5 years. 0.03 %, THX Ultra2 certified, I tried one at home once for a couple of days with my Vandersteen 3A speakers and it sounded terrible. "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+," reports Michael Zisserson at positive-feedback.com. - Parasound Halo A21 - Wyred4Sound ST-500 MKii with wire/post upgrade - Odyssey Audio Stratos Extreme - Odyssey Audio Kismet - Benchmark AHB2 amp First choice is Parasound Halo A21. Frequency Response. > 110 dB, input shorted, unweighted, Damping Factor This RA number must be clearly marked on the outer carton only. +9 Vdc to +12 Vdc, 5 mA, Audio Trigger Requirements 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. The new Parasound Halo A 21+ and A 23+ employ higher-capacity power supplies to increase output from 250 to 300 watts and 125 to 160 watts respectively. main. Balanced: 66 kΩ,(33 kΩ per leg), Input Sensitivity for 28.28 V Output into 8 Ω ", Positive Feedback January 2019 I actually purchased my A21+ from them. 16 beta-matched 15 amp, 60 MHz bipolar output transistors. "With its high-quality chassis, thoughtful circuit design, and excellent sound quality, the A 21+ offers an impressive value proposition. It will be a perfect match for your speakers. I believe the Parasound are Class A to 10W, same output wattage-wise. 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. Total Harmonic Distortion (THD) 0.2 %. Input sensitivity: 1V per leg balanced, 1V unbalanced. Output Impedance / Channel. Unbalanced: 1 V This is helpful for those of us who employ "gain staging" to minimize overall system output noise and who wish to … 16 beta-matched 15 ampere, 60 MHz bipolar output transistors. ,1752'8&7,21 7kdqn 115 dB, input shorted, IHF A-weighted 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. The component under review, the $2000 Halo A 21 stereo amp, is slotted in further down the Parasound line. Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt. Rack mount hardware is included. © Parasound Products, Inc. All right reserved. 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, 300 watts x 2 @ 8 Ω RMS, both channels driven, 500 watts x 2 @ 4 Ω RMS, both channels driven, Circuitry designed by legendary John Curl, Stable with speaker impedance dips to 1.5 Ω, CHK Infinium, custom 5-way speaker binding posts, Gold-plated RCA input & loop output jacks, Direct-coupled signal path, no capacitors or inductors, AC turn-on inrush surge protection with relay bypass, 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. audio line-out, Typical Listening levels: 300 Watts Output Power / Channel. 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