Thanks, looks interesting...can't find any reviews. I don’t know where you are located but AudioAdvisor is a US online dealer for both Bryston and Parasound. I don't push the recommended range on my set and I am in 55W and 58W of class A bias on my samples (assuming 8Ohm load). You are correct. In his review of the ($3,495) Rogue Audio Stereo 100 power amp, HR stated that the amp in triode mode "delivered bigger, deeper, more CinemaScope soundstages populated with denser, more vivid three-dimensional aural images" and "in my view, the Stereo 100 is everything—sonically, mechanically, aesthetically—that we could hope for in a 21st-century tube amp. Parasound JC2 preamp $4495 - Stereophile Class A rated. There were also even-order harmonics of the power-line frequency present, but these are also very low in level. Benchmark AHB2 - differences between stereo amp and two monos. How does it compare with the Parasound 21+. Bridged/mono power rating is 750W into either 8Ω or 4Ω. But in the article you linked, this is a direct quote... " Still, for $899. 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 wish Hi-Fi News still had their old reports and reviews in a different subsection of the website as archives. I read with interest your previous review of the AHB2 amp. This is evident with the release of the new Parasound A 21+ stereo power amp ($3150), the successor to the A 21, which was originally launched in 2003. Audio Science Review July 2020. well done. - Cambridge Audio Azur 851W. Selected the A21+ based on Kal’s review of the F228Be’s. This amplifier is a beast in every aspect: in performance and in its weight! Thanks, may be more boxes than I'd like to deal with. Stereophile has also reviewed the PS Audio Stellar M700. The Parasound's voltage gain into 8 ohms measured 29.2dB from the balanced inputs, 29.4dB from the unbalanced inputs. Parasound’s A21 dispensed truly sumptuous sound," notes England's Hi-Fi News magazine for November 2011. Me, personally? 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. I find that the sound is not powerful enough. Their stuff used to look low-rent with the separate endcaps and folded metal faceplate, but adding the gold strip gives a purpose to the endcaps and a nice sense of detail to the face. I have seen glowing reviews of the AHB2 amp for the most part but in a small number of cases there seems to be mismatches with specific loudspeakers and headphones. Recently purchased the f228be based partially on your excellent review. One could also consider bi-amping the F228Be speakers with a ... Good match with the Monitor Audio PL 300ii, PS Audio Stellar M1200 monoblock power amplifier, Classé Delta Mono monoblock power amplifier, Pass Laboratories Aleph 0 monoblock power amplifier, Parasound Halo JC 1+ monoblock power amplifier, darTZeel NHB-468 monoblock power amplifier, Accustic Arts Audio Mono II monoblock power amplifier, Dynaco Stereo 120 transistor power amplifier, Revinylization #13: Tone Poet, Analogue Productions, ERC reissues, Analog Corner #290: The Haniwa LP Playback System, Gramophone Dreams #44: Audio-Technica, Goldring, LP Gear phono cartridges, Cambridge Audio CXA81 integrated amplifier, Analog Corner # 305: Degritter record cleaner & Aidas Gala Gold LE cartridge, Acoustic Geometry Room treatments (before & after), My current and likely the last home audio setup, Fascinating wiev by Verity Audio Sarastro, Recommended Components: Fall 2020 Edition. and will be running all of this through Thiel CS2 speakers. to buy a pair without audition, I would mate the A21+ with the f228Be. They can claim it at the front desk.". Fig.4 Parasound A21+, distortion (%) vs 1kHz continuous output power into 8 ohms. No discrepancy. Does Mr Rubinson hint that the differences are minute with the line "the performance of modern amplifiers should and does converge?" He tried the Classe amplifier which is a class D like the NAD and found the other 2 amps to be better match with the F228Be so I decided to go with the new Parasound. The maximum power into 2 ohms with one channel driven was 900W (23.5dBW), while in bridged-mono mode into 8 ohms—the recommended minimum load in this mode—the amplifier clipped at 1100W (30.4dBW). Fig.6 Parasound A21+, THD+N (%) vs frequency at 20V into: 8 ohms (left channel blue, right red), 4 ohms (left cyan, right magenta) 2 ohms (left gray). I had also tried several other USB cables such as AudioQuest Carbon and Diamond and Kimber Kable CU. In 2003, Stereophile awarded it 'Amplifier of the Year' and has honored it as a 'Class A Recommended Component' twice a year for fifteen years - far longer than any other audio component. The Parasound's output impedance was a very low 0.077 ohm at 20Hz and 1kHz, increasingly slightly to 0.1 ohm at 20kHz. haha. I am running on a pair of Focal Aria 926 but plan on upgrading to a set of Paradigm Persona 3f's as soon as finances allow. - Parasound A21+ I tested a Revel set up (2.0) with a MacIntosh amplification at the dealers and it sounded wonderful. To the left of the posts are the controls and connections for the various turn-on options; to the right are the main power switch and the IEC power receptacle. When I click on the link, that connects me to your review of F228Be ...... You can try clicking on the link :-) ...... Aha! Me, personally? Last edited: Jan 20, 2019. I'd like to see this design implemented over Class D any day... ... (and one-third the price) Parasound NewClassic 2250 v.2, which has a 2-channel power rating of 275W into 8Ω and 400W into either 4Ω or 2Ω. The component under review, the $2000 Halo A 21 stereo amp, is slotted in further down the Parasound line. FS: Parasound Halo P5 2.1 Preamp w/ DAC , Yamaha C-4 Vintage Preamp: Audio Equipment For Sale: 0: Nov 28, 2020: P: Should I add a DAC for Node2i + Parasound A21 + KEF LS50 setup? In his review of the ($3,495) Rogue Audio Stereo 100 power amp, HR stated that the amp in triode mode "delivered bigger, deeper, more CinemaScope soundstages populated with denser, more vivid three-dimensional aural images" and "in my view, the Stereo 100 is everything—sonically, mechanically, aesthetically—that we could hope for in a 21st-century tube amp. While overall you appeared to be impressed with the AHB2, you reported that it did not mate well with certain speakers. Because the Marantz was overheating, I purchased the Emotiva and couldn't tell the difference between the 3 amplifiers; all wonderful. I don’t know where you are located but AudioAdvisor is a US online dealer for both Bryston and Parasound. None of these sounded nearly as good as the SR. TEAC connects to the A21+ using a set of AudioQuest Earth XLR cables. I listen from about 10' away, so I can live with that. = 27 kg)--especially if you … I currently own 4 x parasound amplifiers, a21, a31, a23 x2. That is not a joke: it is impossible to lift this super-heavy amplifier (60 lbs. 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. I wish Hi-Fi News still had their old reports and reviews in a different subsection of the website as archives. Listening to the A 21+ 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. Thanks, Great review. 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). 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. Dunno. Parasound Halo A21+ Two Channel Amplifier. The Benchmark HPA4 preamp, the sister to the LA4, is fantastic on every level and I am so grateful for the review which led to my satisfied purchase! Food for thought? You personally. The THD+N was very low in the midrange into 8, 4, and 2 ohms (fig.6) but rose at higher frequencies. heck, forget that conditional: I am greatly impressed with the Emotiva XPA-5.". The Benchmarks live in the city where, so far, they have not disappointed. Thank you so much for the hand. Using our definition of clipping, which is when the output's percentage of THD+noise reaches 1%, the Parasound easily exceeded its specified powers with both channels driven with a 1kHz signal. Each set includes a balanced (XLR) input, an unbalanced (RCA) input, a switch to toggle between them, an unbalanced (RCA) loop-through output, and a gain control. ...a larger (apparent) soundstage, then try a tube amp. The price is nearly identical, about $400 more on the Bryston. I'm sure this is a wonderful amplifier, and I know there are significant differences in speakers' quality, but I never see A/B tests among amps (like Revel does with their speakers). I no longer have the Revel Performa F228Be but I bought a pair of the Revel Performa3 F206 speakers for surround channels, primarily. I admit it wasn’t phrased quite so politically correctly, but the point is still the same. . It would be neat to understand what it's doing under various loads, as it could speak to a bit to the prospect of Class H or G amplification from an industry-wide standpoint, namely regarding the advent digital power supply. NAD M22 is a pretty good, powerful amp ........ Why you want to change it? Bridged/mono power rating is 750W into either 8Ω or 4Ω. • Total harmonic distortion at full power has been halved, from 0.2% to 0.1%; at normal listening levels it's claimed to be below 0.03%. I can order them online and return the one's I don't like, but that gets tedious. The change in sound (for me) was very pronounced. However, it seems to me that regarding measurements the A21+, according to Stereophile plots, is a step back. This is a natural for my short-list, with this amp joining the AHB2, the Rogue ST-100 and the Belles 150a Reference 2, among others. (One can still search for the original re-printed review though.) The performance-related improvements—power output, S/N ratio, THD, and channel separation—are not huge, but they are appreciated; the increase in weight not so much. Another amp which could also be considered ......... AudioControl Avalon G4 ($2,200), favorably reviewed by TJN for S&V magazine ....... 2, 3 or 4 channels, 600 WPC 8 Ohms, 2 channels :-) ........ ... (for $999 each) and still have money left over? 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? There is no headroom with the amp whatsoever, but it still does 200Wpc into 4 ohms, and the monoblocks close to 500Wpc. There's a single On/Off button to the lower left, a high-temperature indicator to the lower right, and two small, blue LEDs between them: the indicator lights for the left and right channels. . "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." The less powerful Bryston 2b3 is on sale for $3865.50 which still more than $400 than the A21+. Greater overall capacity with the monos, obviously. Fig.7 Parasound A21+, 1kHz waveform at 25W into 8 ohms, 0.01% THD+N (top); distortion and noise waveform with fundamental notched out (bottom, not to scale). ...a larger (apparent) soundstage, then try a tube amp. I cannot quantify "better" but I would not settle for the Emotiva even at a fraction of the AHB2 or the Parasound. Parasound specifies the A 21+ as delivering 300W into 8 ohms (24.8dBW) with both channels driven and 500W into 4 ohms (24dBW). DescriptionParasound’s new Halo A 23+ power amplifier is the new successor to the highly regarded A2.. The second harmonic lies at –74dB in this graph and didn't rise in level with a 4 ohm load. Allright fellas, with your help, I've narrowed it down to either the Vincent sp-331, or the Parasound a21. Measured with the unbalanced inputs shorted to ground, the amplifier's unweighted, wideband signal/noise ratio was 78.1dB ref. Parasound at Rocky Mountain AudioFest 2017 - Stereophile review by Herb Reichert. I tested a Revel set up (2.0) with a MacIntosh amplification at the dealers and it sounded wonderful. Across the top are two sets of connectors and controls, one per channel, with a bridged mono switch between them. I preconditioned the amplifier by operating it at one-third the specified power into 8 ohms for an hour. heck, forget that conditional: I am greatly impressed with the Emotiva XPA-5.". When I had an Emotiva (https://www.stereophile.com/content/music-round-51), it did not satisfy me. Positive Feedback January 2019. – read the review at What Hi-Fi? The top panel was also hot, at 116°F (46.7.1°C). Selected the A21+ based on Kal’s review of the F228Be’s. Parasound seems to have attended to every aspect of their design including the excellent build quality internally and externally matched with great looks." 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. • Cosmetics were updated with aluminum endcaps and gold highlights. The modulation of the amplifier's frequency response, due to the Ohm's law interaction between this source impedance and the impedance of our standard simulated loudspeaker, was therefore minuscule, at ±0.1dB (fig.1, gray trace). They currently have the 3b3 on sale for $5215.50 while the A21+ is $2995. Tell me if I'm wrong... How much does my sound "suffer" by using a $2000 Marantz integrated amp/receiver or an Emotiva amp? ), something the A21+ above avoids completely, due to its far greater power capabilities. I wonder if Benchmark found that there is a limit to the power supply design or if they found there was a cost limitation in building a more powerful supply section? That was a good move, because that was when I came across the Parasound A21. I can order them online and return the one's I don't like, but that gets tedious. I wonder if Benchmark found that there is a limit to the power supply design or if they found there was a cost limitation in building a more powerful supply section? If I was forced(!) Side note - while there's no problem finding reviews on Parasound amps, I looked long and hard and couldn't find even a hint of a real review on one of the Emotiva DR models - and they've been out for a while now. Parasound DAC 2000 ULTRA DACs user reviews : 4.9 out of 5 - 10 reviews - audioreview.com Maybe larger soundstage, fuller/richer mids. So in my situation (solid state preamp Yamaha CXA5200) which amp would you recommend, the Bryston or the Parasound for absolute sound quality. I will have to take a gander at my local dealer. When I click on the link, that connects me to your review of F228Be ...... You can try clicking on the link :-) ...... Aha! 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. Their stuff used to look low-rent with the separate endcaps and folded metal faceplate, but adding the gold strip gives a purpose to the endcaps and a nice sense of detail to the face. 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. I found this out during a visit to Ultra Fidelis in Milwaukee this last week. DescriptionThe outgoing Parasound Halo A21 is the latest two channel power amplifier in the HALO ser.. £3,799.00. I suspect that you have put your finger on the reason for these mismatches. Parasound needs to promote the designer that put the gold trim strip in the faceplate. If you say so. Since I already have in house the new amp's three-channel sibling, the Parasound A 31, I was comfortable installing the A 21+ in my system using the same XLR input cables and speaker cables, the latter with locking banana pins. When I had an Emotiva (https://www.stereophile.com/content/music-round-51), it did not satisfy me. The unbalanced input impedance was 46k ohms at low and middle frequencies, 37k ohms at the top of the audioband. 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). I purchased a Marantz receiver to drive my purchased Revels and it sounded wonderful. It is on kind loan from a member. There's no where I can go to listen to all the different amp options with a specific speaker model. The Parasound A 21+ offers a lot of low-distortion power and isn't fazed by impedances as low as 2 ohms.—John Atkinson. 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? I suspect that you have put your finger on the reason for these mismatches. • Signal/Noise is up from 112dB to 115dB. When the amplifier drove an equal mix of 19 and 20kHz tones at 50W into 8 ohms (fig.9), the second-order difference product at 1kHz lay at a very low –86dB (0.005%), and higher-order intermodulation products were even lower in level. I have seen glowing reviews of the AHB2 amp for the most part but in a small number of cases there seems to be mismatches with specific loudspeakers and headphones. Dunno. "Unless an amp designer imposes her will ... ", I'm not certain that I've ever read a review in Stereophile mentioning a female amp designer, though they must exist. The less powerful Bryston 2b3 is on sale for $3865.50 which still more than $400 than the A21+. But in the article you linked, this is a direct quote... " Still, for $899. Stereophile has also reviewed the PS Audio Stellar M700. I am considering the following Power Amps to drive my Monitor Audio PL300ii. Parasound has established close and long-term relationships, some spanning more than three decades, with contract manufacturers in Taiwan, which are responsible for the manufacturing. That's all I can offer (with included qualifications). I would anticipate(!) Fig.2 Parasound A21+, small-signal 10kHz squarewave into 8 ohms. 4 Distinct Product Lines. I no longer have the Revel Performa F228Be but I bought a pair of the Revel Performa3 F206 speakers for surround channels, primarily. Daily digest of Parasound Amplifier Reviews by Critics from around the web. The only problem that I had was with an AHB2 with the Monitor Audio Silver 8s in my CT system and I have not tried them with the monoblocs. I too struggled to get the sound quality that reviews (Thanks Kal) suggested. one thing that i think is funny; john curl, the desgner at parasound, was poor-mouthing this amp in a forum a while back, and suggesting that the a21 is much better. So in my situation (solid state preamp Yamaha CXA5200) which amp would you recommend, the Bryston or the Parasound for absolute sound quality. maybe even listen. The only problem that I had was with an AHB2 with the Monitor Audio Silver 8s in my CT system and I have not tried them with the monoblocs. Looking at other measurements and reviews.... Now, may we please have a test of the non-Halo ... Why not simply buy two of the Parasound 2250 amps ... You say the Emotiva did not satisfy you??? The Pragmatists at Parasound chose to re-spin the A21 amplifier into the A21+. I am acquainted with Parasound, as my first audiophile quality CD player was a Parasound CDP-1000, and later I bought a Parasound DAC-1500 to upgrade the overall source quality. Good luck. http://rogueaudio.com/Products_Atlas_Magnum.htm 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. (With a class-AB output stage, one-third power results in the maximum dissipation in the output devices.) Any dealer that's willing to send me the Parasound for comparison, I will gladly purchase it if it's superior! Parasound Halo A23 Stereo Amplifier Review In light of our slow shift toward two channel audio (no, we are not abandoning personal audio), I decided it would be a good idea to start with something basic, like a stereo amplifier. Bryston 3B3 is high on my list, but considerably more expensive. What I really like are the brawny speaker terminals that you can tighten firmly without tools and, although not listed above, the modified rear-panel gain controls: On the A 21, the only calibration mark on each dual-mono gain control knob says "THX Reference." (These figures include the series impedance of 6' of loudspeaker cable.) No discrepancy. Parasound a31 THX Amplifier for Home Theaters | The Review The parasound a31 is a 3 channel amplifier that delivers 250 or 400 watts per channel. "The new JC 5 is a remarkable amplifier that creates a new sweet spot in our Halo product family," said Richard Schram, the president and founder of Parasound. Parasound Halo A23+ Two Channel Amplifier. Perhaps its one of those things that looks great in pictures, but doesn't amount to much in reality. Thanks, Great review. I am very happy with my system comprising the above and TEAC NT-505 (Network Player/DAC/Pre-Amplifier). A slight 0.35dB channel imbalance in favor of the left channel (blue and cyan traces) can be seen in fig.1, even though the level controls for the two channels had both been set to their maximum positions. I have not had an integrated amp or AVR in house in a very long time. . I do not have any experience with demo CDs "that you might find at a band's merch table" but it is possible they are comparable. He tried the Classe amplifier which is a class D like the NAD and found the other 2 amps to be better match with the F228Be so I decided to go with the new Parasound. Frustrated, and for the sake of this review, I was forced to speculate about the nature of accurate and neutral. Parasound Products was founded in 1981, in San Francisco, by Richard Schram, whose mission was to provide value for the money to his customers. and thank you for the comparisons of the Halo A21+ with the Benchmark AHB2, as I am in the market for a power amp directly in this price segment. Interesting. That … Moves the sound though the system with ease, power and fluid control. They have performed the modification in the past for customers as well. (With a class-AB output stage, one-third power results in the maximum dissipation in the output devices.) They can claim it at the front desk.". 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. Their design including the excellent build quality internally and externally matched with great looks ''... 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