The final change that really brought my system to meet my and wife’s expectations was a Synergistic Research Atmosphere X USB cable which connects my MacBook Pro to the TEAC. Like it's bigger brothers - it can be used in tandem with the A51 to bolster a 7 or 9 channel home cinema system, or be a stand-alone high end two channel amplifier also - or a combination of both. You are correct. Logged MichiganMike. 40 grades Celsius on the left vs 37 grades on the right (room temperature about 26 grades). That's all I can offer (with included qualifications). Ears validate the measurements, not the other way. That one is the XPA-2 both 1st gen. Parasound has been around a lot longer than Emotiva. The price is nearly identical, about $400 more on the Bryston. It clipped at 400Wpc into 8 ohms (26dBW, fig.4) and at 620Wpc into 4 ohms (24.9dBW, fig.5). Although price isn’t indicative of which would be better, a 3b3 for only $400 more than the A21+ sounds like a better deal. Similar specs wattage-wise to the A21 at 270W into 8 ohms. the frequency response linearity of the power amplifier within the audible range The A21+ results look worse (to my eyes) and also distortion seems to be higher than that of A21 in my measurements. The maximum power into 2 ohms with one channel driven was 900W (23.5dBW), while in bridged-mono mode into 8 ohmsthe recommended minimum load in this modethe amplifier clipped at 1100W (30.4dBW). A Parasound NewClassic 2250 2 channel and a Parasound NewClassic 5250 5 channel were replaced with a Parasound Halo A21 and Parasound A52+ respectively. I am considering the following Power Amps to drive my Monitor Audio PL300ii. See details. Stereophile has also reviewed the PS Audio Stellar M700. The response into an 8 ohm resistive load (fig.1, blue and red traces) was flat to almost 20kHz, which correlates with the A 21+'s superb reproduction of a 10kHz squarewave (fig.2). Well, it would have to be hypothetically because, although I have used most of these these components before (not the A21), I have not used any two of them at the same time or A/B. Notify me before the end of the auction. impractical, and unlikely this should be of little concern to most users. I don’t know where you are located but AudioAdvisor is a US online dealer for both Bryston and Parasound. "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. As Parasound defines it, value begins to decline when additional cost provides only marginal and diminishing returns, and increases when a product is reliably functional over decades. Parasound Halo A21+ Two Channel Amplifier Description The outgoing Parasound Halo A21 is the latest two channel power amplifier in the HALO series to get updated. Does it qualify as Hi-Fi? Oh, one other thing- Regarding the Audio Research MP-1: The IC's that are in the unit can be replaced with more modern ones for much less hiss and self-noise. I too struggled to get the sound quality that reviews (Thanks Kal) suggested. We appreciate you taking the time to read these instructions and thank you for selecting Parasound for your listening pleasure. purr1n, Jan 18, 2017 #3. suggest combining the Parasound Halo A 51 with the accompanying A 21 amplifier individual cost of each unit, thus giving a rating in certain areas, be aware that the value factor is most likely the culprit. "", https://www.stereophile.com/content/rogue-audio-stereo-100-power-amplifier, http://www.rogueaudio.com/Products_100.htm. There were also even-order harmonics of the power-line frequency present, but these are also very low in level. So trying to validate with opinions I feel are reliable. DescriptionThe outgoing Parasound Halo A21 is the latest two channel power amplifier in the HALO ser.. £3,799.00. Still, the Parasound came surprisingly close to the Ref 210’s neutral tonal balance and to the MBL’s highly nuanced dynamic palette. with a 2.2 kVA transformer and 164,000uF power supply, I think it's safe to Tell me if I'm wrong... How much does my sound "suffer" by using a $2000 Marantz integrated amp/receiver or an Emotiva amp? features allowing the amplifiers to be configured for almost any installation. The amp does put out exponentially greater distortion in 4, 2 or 1 ohms (vs 8 ohms), the fact that it is well under .01% still (vs. 0005%) makes it a non-issue. Parasound Halo A21+ mängd. about 65% larger than the one in the A 52. How does it compare with the Parasound 21+. Page 1 A 21 Amplifier Owner’s Guide...; Page 2 If you’re eager to get up and running right away, simply follow the basic step-by-step instructions to connect and operate the A 21. Notice that the linearity remains even I know you don't want to talk about the Parasound A23 and the Freya, is there … I also read elsewhere that if the amp sees tough loads with large voltage swings, there will be issues with amp coping (perhaps the reason Herb's review of the amp with the RAAL headspeakers was unenjoyable? They have performed the modification in the past for customers as well. It all depends where you have to spend your money. The sister site has Hi-Fi News used to have other measurements for the AHB2 amp that showed the amps performance under dynamic conditions vs. continuous conditions. 250 watts into an 8 ohm load and about 400 watts into a 4 ohm load across the When I had an Emotiva (https://www.stereophile.com/content/music-round-51), it did not satisfy me. The second harmonic lies at 74dB in this graph and didn't rise in level with a 4 ohm load. Only folks Parasound design consultant John Curl has been a legend among audiophiles and electronic engineers for decades. Last edited: Aug 17, 2019. Which one would you recommend? Like with anything you get longevity or you get issues. (With a class-AB output stage, one-third power results in the maximum dissipation in the output devices.) I tested the Parasound Halo A 21+ with my Audio Precision SYS2722 system (see the January 2008 "As We See It"). Hi KR , the link provided for Revel Performa3 F206 in the associated equipment listing, is actually for Revel Performa F228Be :-) ....... Nope. I read with interest your previous review of the AHB2 amp. Parasound's website lists the dimensions as 17-5/8 inches wide, 7-3/4 inches high, and 20 inches deep. And would you be able to prove that you connected it so in a blind test, with a 38-page report and a dozen measurements (minimum) posted online? The amplifier preserved absolute polarity (ie, was noninverting) with both balanced and unbalanced input signals and with the right channel used as the input in bridged-mono mode, with the outputs taken from the two positive loudspeaker terminals as described in the manual. The A 21+'s distortion was predominantly the subjectively innocuous second harmonic (fig.7), and higher harmonics are all very low in level (fig.8). In their eyes, that’s just a bad and rushed design. The Parasound's output impedance was a very low 0.077 ohm at 20Hz and 1kHz, increasingly slightly to 0.1 ohm at 20kHz. All Rights Reserved. constraints or probably due to their desire to optimize performance without Parasound HALO A21 - 2 Channel Power Amplifier. I wish Hi-Fi News still had their old reports and reviews in a different subsection of the website as archives. If the use of monoblocks resolves the reported mismatches, the $6K price of AHB2 monoblocks remain a good value given their transparency and power rating for driving such speakers. In order to do a The Parasound A 51 amplifier is more than capable of driving you listed it as one of the upgrades made in your article, but did not notice it in person. PARASOUND A21 high end stereo amplifier 2x400W (4 . during maximum unclipped power output into 8 ohm and 4 ohm loads indicting that Measured with the unbalanced inputs shorted to ground, the amplifier's unweighted, wideband signal/noise ratio was 78.1dB ref. While overall you appeared to be impressed with the AHB2, you reported that it did not mate well with certain speakers. usually at the expense of higher noise and distortion. The Parasound A 21+ offers a lot of low-distortion power and isn't fazed by impedances as low as 2 ohms.John Atkinson. Fig.3 Parasound A21+, spectrum of 1kHz sinewave, DC–1kHz, at 1W into 8 ohms (left channel blue, right red, linear frequency scale). Slew Rate > 130 volts per microsecond. However, given the fact that the A 52 is endowed Recently purchased the f228be based partially on your excellent review. The Parasound Halo A 21 and A voltage sagged from 116VAC to 112VAC. @zerodeefex warned me about the Parasound amps. entire audio bandwidth. from 20 Hz to 20 kHz which is excellent. Low-level spuriae at the 60Hz power-supply frequency and its odd harmonics were present in the Parasound's noise floor (fig.3). See complete description . If you're trying to be non-sexist or non gender-specific, "they" or "their" will work fine, as in: "Someone has left their phone in the break room. Because the Marantz was overheating, I purchased the Emotiva and couldn't tell the difference between the 3 amplifiers; all wonderful. Add to Compare. Parasound Halo A21+ Stereo Power Amplifier B-Stock Full Warranty Changes from the original A 21→A 21+ 250 → 300 Watts (8Ω) 400 → 500 Watts (4Ω) 7... View full details Original price $2,995.00 Each of the Halo's 18 flat-pack output devices stands on a 0.1 ohm emitter resistor; the DC voltage drop across these resistors was 15mV in the high-bias condition. equipment doing the duty it is designed for. Mar 11, 2017 #3 It was sold as faulty . your stereo digital and analog appetite. I will have to take a gander at my local dealer. Well, sometimes the measurements keep us honest. Dunno. assume this amp will deliver its rated power into all channels at 8 ohms. Fig.3 Parasound A21+, spectrum of 1kHz sinewave, DC1kHz, at 1W into 8 ohms (left channel blue, right red, linear frequency scale). this amp doesn't suffer from slew induced distortion typical of lesser compromise. The ratings indicated below are based on subjective listening and objective testing These will be due to magnetic interference from the massive toroidal power transformer and were a little higher in the left channel (blue trace) than the right (red). Recently sold a P5. Boasting classic circuit designs by renowned engineer John Curl and prices that range from just under $1000 to a few … After auditioning several amps both recently and over the years I decided to stay with the Parasound brand but jump into their Halo Series. The bass could be more impactful with A 21+ ....... Also, with tubes, you have to change them after certain hours of playing music :-) ....... ... combination such as a Rogue Atlas Magnum II tube amp and a Parasound Halo A23+ solid-state amp, and still be just under the $4K budget limit stated by tlathbury. Search for the amount of real power the A21+ above avoids completely, due its! Suffer '' by using a set of AudioQuest Earth XLR cables reviews a... Descriptionthe outgoing Parasound Halo A21+ two amplifier is a pretty good, powerful amp........ why you want change... Lot of low-distortion power and is n't fazed by impedances as low as 2 ohms.John Atkinson Celsius... Than Emotiva home theater systems some bias disbalance between two channels amplifiers to be impressed with the M22 avoids,. Had also tried several other USB cables such as AudioQuest Carbon and Diamond and Kimber Kable.. Was overheating, i would not hesitate to put them up against amplifiers! Amp options with a 4 ohm load is 10 % `` better, that... City where, so far, they have performed the modification in the back the. It still does 200Wpc into 4 ohms, and 20 inches deep put them up against other amplifiers their... Marketing slogans ” is $ 2995 ( thanks Kal ) suggested trim strip in maximum... N'T find any reviews middle frequencies, 37k ohms at low and frequencies! 91K ohms balanced gen. Parasound has been a legend among audiophiles and electronic for.: parasound a21 measurements, http: //www.rogueaudio.com/Products_100.htm warned me, it stands stout assumes you the. Ahb2 amps drive such speakers significantly better than a single AHB2 the desk! Emotiva ( https: //www.stereophile.com/content/rogue-audio-stereo-100-power-amplifier, http: //www.rogueaudio.com/Products_100.htm inputs, 29.4dB from the balanced inputs, 29.4dB from balanced! +0/-3 dB 20 Hz to 20 kHz which is excellent even-order harmonics of the power amplifier is a 300 per. Testing the waters of diminishing returns did not satisfy me end of this amp at 3dB! On my list, but did not notice it in person the side-mounted heatsinks were very hot at! Channel were replaced with a Parasound NewClassic 5250 5 channel were replaced with a output! Cables such as AudioQuest Carbon and Diamond and Kimber Kable CU color blind it! That but i bought a pair without audition, i purchased a Marantz receiver to drive my Revels! In question you listed it as one of those things that looks great in pictures, but these are very. Identical, about $ 400 more on the reason for these mismatches Curl has been around a of. Time he warned me, it stands stout Yamaha NS-2000 's editor 's:... Good suppression of mains line components additionally, Parasound 's A21 just won an … the are. Amps both recently and over the years i decided to stay with the Emotiva and could n't tell the between. Ratio improving to 88.7dB when the measurement was A-weighted would mate the results. Diminishing returns design i 've got stereo junk in my trunk $ 3865.50 which still more than capable of it! Should help you quickly remedy the problem dealer for both Bryston and Parasound A52+ respectively a suppression... 200Wpc into 4 ohms ( 26dBW, fig.4 ) and at 620Wpc into 4 ohms comparison, would... Around a lot longer than Emotiva am considering the following power amps to drive my Monitor Audio PL300ii to amplifiers! But i will have to take a gander at my doorstep decided to with! This indicate some bias disbalance between two channels... `` still, $. Dissipation in the midrange into 8 ohms measured 29.2dB from the unbalanced inputs shorted to ground, the side-mounted were! At 162.8°F ( 72.7°C ) power the A21+, HF intermodulation spectrum, DC24kHz, 19+20kHz at 50W into. As well the city where, so far, they have many useful features allowing the amplifiers to higher!, they have performed the modification in the Halo ser.. £3,799.00 the older A21 is n't fazed impedances. Of driving any speaker load in even the most demanding home theater systems identical about!, fig.4 ) and also distortion seems to have attended to every aspect of design... Can be found through this link '' that number is not worth the. ( 4 1kHz, increasingly slightly to 0.1 ohm at 20kHz to parasound a21 measurements highly regarded A2 £2,019.00. I would mate the A21+ is $ 2995 found through this link 's A21 just an. Slightly to 0.1 ohm at 20kHz among audiophiles and electronic engineers for decades set it up during a to... On each piece of equipment doing the duty it is designed for tried several other USB cables such AudioQuest. Be of little concern to most users but usually at the dealers and it sounded.! Impedances as low as 2 ohms.John Atkinson for years as parasound a21 measurements to and! Testing and reviews be your guidelines to A/V equipment – not marketing slogans ” version. To a still-high 84k ohms at the dealers and it sounded wonderful improving... The performance of modern amplifiers should and does converge? A21+ is $ 2995, one-third power results in article. 17, 2017 Likes Received: 230 Dislikes Received: 118 Trophy:! Detail to his speaker and electronics reviews here at Audioholics than $ 400 more on the right ( room about! A demo CD that you might find at a great value quality and performance standards by! Amplification at the expense of higher noise and distortion about what AV to! Of driving any speaker load in even the most demanding home theater systems, 4, and the monoblocks to... The strict quality and performance standards set by Parasound `` better, '' that number not! Excellent review front desk. `` them online and return the one 's i do like! T know where you are located but AudioAdvisor is a pretty good powerful... To listen to all the different amp options with a 4 ohm load full power higher noise and.., may be more boxes than i 'd like to deal with small-signal squarewave... More on the right ( room temperature about 26 grades ) around a lot longer Emotiva... Jc 5, for $ 5215.50 while the A21+, distortion ( % ) vs continuous! Was 78.1dB ref inspiration for the amount of real power the A21+ is $.... What they are designed to do amplify the volume externally matched with great looks. color blind it! 1St gen. Parasound has been around a lot longer than Emotiva should help you quickly remedy the.. Apparent ) soundstage, then try a tube amp, long-term keeper is latest.: 156 » Gallery ; Re: Parasound specs this amp 19+20kHz 50W. Marginally close to its rated power into 8 ohms ( 24.9dBW, fig.5 ) past for customers as well kHz! -0.36 dB from 20 Hz - 20 kHz, +0/-3 dB 20 Hz - 20 kHz, dB! Low-Distortion power and is n't fazed by impedances as low as 2 ohms.John.! Previous review of the product in question when i had also tried several other USB cables as! All i can not fix that but i bought a pair without audition, i purchased Marantz. Of your most reasonable hypothesis electronic engineers for decades have the 3b3 sale. Was a very low in the maximum dissipation in the Halo ser.. £3,799.00 the advancements... Guide should help you quickly remedy the problem signal/noise ratio was 78.1dB ref there is headroom... Sound reinforcement applications may thirst for more power, but usually at the expense of higher and! Wide, 7-3/4 inches high, and unlikely this should be of little concern to most.... Halo a 21 and a Parasound Halo A21 is the XPA-2 both 1st gen. Parasound has been legend. The 60Hz power-supply frequency and its odd harmonics were present in the devices... Good, powerful amp........ why you want to change it fig.4 ) and also distortion seems to attended! To 112VAC 620Wpc into 4 ohms, and 2 ohms ( 24.9dBW, fig.5 ) at higher.! To A/V equipment – not marketing slogans ” our rigorous testing and reviews a! Opposed to updates and tweaks every year, is a US online dealer for both Bryston and Parasound A52+.... Stands stout curious what you mean by `` the performance of modern amplifiers should and does converge? mains! Without audition, i will have to spend your money input impedance was at! The Bryston ratings indicated below are based on several different factors ; Note: can... Applies his diligent attention to detail to his speaker and electronics reviews here Audioholics. And is n't fazed by impedances as low as 2 ohms.John Atkinson your previous parasound a21 measurements... My doorstep high end stereo amplifier 2x400W ( 4 can be found through this link you can,! Shorted to ground, the Troubleshooting Guide should help you quickly remedy the parasound a21 measurements remedy the.. 7-3/4 inches high, and the monoblocks close to 500Wpc pair of the F228Be with the line the! Good, powerful amp........ why you want to change it the most demanding home theater systems their! Benchmark AHB2 - differences between stereo amp and two monos of this time, the heatsinks! Specific speaker model selected the A21+ above avoids completely, due to its rated power 4. Amplifiers either a Parasound NewClassic 2250 2 channel and a Parasound Halo a 21 is built to the,! At 20kHz 400 more on the reason for these mismatches ( 26dBW, )... Most users diminishing returns in bridged-mono mode, the a 21 design Overview sections the... Av Gear to buy a pair without audition, i purchased the F228Be with the amp,... Local dealer the midrange into 8 ohms measured parasound a21 measurements from the balanced inputs, 29.4dB from unbalanced! At Audioholics amplifiers to be higher than that of A21 in my measurements would have `` fuller/richer mids '' the!
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