No shortage of machismo – it has to be an American power amp, right? While the A 21+ was here, I was able to compare it to my First Watt J2. Parasound classifies the amp's topology as high-bias Class A/AB. I had been considering, the JC3+ phonostage (which seems to be well received), but I don't know. I just wish it didn't have that "THX certified" logo on the front, kind of cheapens the look imo. My qualified guess is that the integrated is worse than A21. CES Trends: MiniLED and is it Better than OLED? It's also bulky in size, measuring in at 17.6 inches by 7.75 inches by 20 inches. Is the A21 the same as the A23 only with more power? Like its predecessor, the A 21+ still punches well above its price point in overall performance and is still an amplifier that does most things right. Swapping the Parasound in for the $20k Class AB Audio Research Ref 210 tube and $40k Class AB MBL 9008 solidstate monoblocks that are my references was somewhat less of a horizon-lowering experience than I anticipated. You could hear noise and slight hum if the ear was about 50cm from speakers with some 88dB/W/m sensitivity. After 15 years of devoted service, Parasound has retired its beloved Halo A 21 amplifier. Around back, Parasound has upgraded to CHK Infinium five-way speaker terminals, which feature higher-quality gold plating. Parasound Halo A 21+ Stereo Amplifier Reviewed. Really scared. The Parasound 2250 V.2 "new classic" -- 275wpc Stereo Power Amp is ON SALE for $999, down from $1395. This does not seem to appear in the measurements referenced by Pavel. "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." 60 amps current. To improve signal path and consistency over time, the A23+ also utilizes updated heavy-duty speaker terminals and internal gold-on-gold audio connections. The A21 is the two-channel version of Parasound's benchmark A51 five-channel amp, which the May 2003 issue of DVD Etc. But it may lack the tube-like quality of A21. Both are excellent amplifiers in their own right. And despite what the purists say, on occasion, for example when playing a poorly engineered recording, they can be useful. However, it seems to me that regarding measurements the A21+, according to Stereophile plots, is a step back. For my 2 channel system, I have the A21 with the P5 pre-amp along with the JC 3 Jr. phono preamp and love them all. I also measured Parasound P5 preamp. Those shopping for a stereo amplifier in this price range should give the A 21+ serious consideration. Parasound P5 preamp measurements View attachment 83198 The new design halves THD, which is now specified at 0.1 percent. I measured Halo A21 in January 2019. Amir's superb review of the AHB2 is great, and I have fond memories of the Benchmark DAC1, so as a company I'm leaning that way. However, the A 21+ offers a slightly smoother presentation of sound and it should come as no surprise to hear the A 21+ had better grip and control over my speakers' bass drivers. Also, the A21/A51 in stealth black is so damn sleek. Currently paired with the NAD M22 and the sound is excellent, but wondering if it can be improved within the same approx proce range (say $3k-$4k). From that point onward, the amp switches over to Class AB operation. These thoughts are perfectly appropriate when nothing but a plus sign has been added to the model name. 2014 (?). It is getting a little long in the tooth as there are plenty of really good sounding amps in the same price range. As the new model name suggests, Parasound decided to improve upon the A 21's design rather than trying to reinvent the wheel. The amp's overall sound quality is excellent, with its high bias Class A/AB design imparting a particularly smooth, natural, and organic signature to the sound. Using the Parasound amp allowed my speakers to portray every aspect that I had come to expect without adding any noticeable sign of distortion or flaw." You could hear noise and slight hum if the ear was about 50cm from speakers with some 88dB/W/m sensitivity. You'll automatically be entered in the HTR Sweepstakes, and get the hottest audio deals directly in your inbox. These upgrades to the power supply provide a roughly 20 percent increase in output power, with the amp now specified to provide up to 300 watts per channel into eight ohms, 500 watts per channel into four ohms, and up to 1,000 watts into eight ohms in bridged mode. For a better experience, please enable JavaScript in your browser before proceeding. The measurements are generally very similar to mine performed on the older A21. You get a switchable phono stage, a headphone output and even tone controls. I am driving a pair of B&W 804 Diamonds and I really wanted the Rotel to be the keeper. ConclusionThe A 21+ builds upon its predecessor's design, offering upgrades that elevate an already stellar amplifier to a new level. Unboxing and setting up the A 21+ may prove to be a difficult task for some. At a similar price point, I would suggest looking into the Benchmark AHB2 or one of ATI's Signature amplifiers. My XSP-1 has a processor loop. However, if judging the A 21+ on its outward appearance alone, it would seem not much has changed. The numerous upgrades have added considerable weight to the amp, which now tips the scales at 71 pounds. The amp came out around 2008 (?) As the... KONKA Announces Three New Android TV Series for 2021 Lineup. Maybe the fact that analog section seems to be much better than the digital one - see the Stereophile review. Parasound also redesigned the input board layout of the A23+ to improve the cross-channel crosstalk (70 dB vs 63 dB at 20 kHz). Thanks. While it doesn't run as hot as, say, a Pass Labs Class A amplifier, without proper ventilation it may overheat. It fills the hole that was left in 2012 when Parasound discontinued the $2,500 A 52. This amplifier is a beast and, because of that, I suggest you get help when unboxing and setting it up. You could hear noise and slight hum if the ear was about 50cm from speakers with some 88dB/W/m sensitivity. You'll also notice some gold trim has been sandwiched between the two sections of the faceplate in what I assume was Parasound's attempt to help differentiate the A 21+ from its predecessor. In practice, this means the amp is biased to output a little over six watts per channel of pure Class A power. After my 15 year old Goldmund amp broke, I bought an A21 in 2015 to fill the need until either the Goldman could be repaired or replaced with a top of the line power amp. PS: the A21 is the 250wpc @ $2500, the A23 is 100wpc @ $999. As I noted earlier, the A 21+ has a high-bias Class A/AB circuit design, which is one of the amp's standout features. They're now made from brushed aluminum to match the rest of the faceplate. Parasound may have been thinking along these lines when they engaged the well-known amplifier designer John Curl to create their new five-channel amp, the Halo A 52+ ($2,995). JavaScript is disabled. The Pragmatists at Parasound chose to re-spin the A21 amplifier into the A21+. After almost 2 years, local shops are still trying to fix the Goldmund and the A21 has done a wonderful job in my system. An amp that will stay in your system for years. Additional Resources• Visit the Parsound website for additional information.• Parasound Halo P 5 2.1-Channel Preamplifier Reviewed at HomeTheaterReview.com.• Parasound Announces HINT 6 Integrated Amplifier at HomeTheaterReview.com. While six watts may not seem like much, that's enough power to drive all but the most inefficient speakers to reasonably high SPLs for the majority of music or movies you'll likely listen to. This lack of sparkle on the top end makes it an ideal candidate for those who like to listen for long periods of time. Amplifiers, Phono preamp, and Analog Audio Review, Stereo and Multichannel Amplifier Reviews, Parasound Halo Integrated, Pioneer SC-LX 901, Oppo-205, Revel F208 + Heco Aurora Center 30 + Heco Victa Prime 202, Takstar HF 580, “Emergencies” have always been the pretext on which the safeguards of individual liberty have eroded.”. A Parasound NewClassic 2250 2 channel and a Parasound NewClassic 5250 5 channel were replaced with a Parasound Halo A21 and Parasound A52+ respectively. 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? In fact, these are the same speaker terminals found on the company's more expensive JC 5 amplifier, though only a single pair of terminals is included per channel, so those looking to bi-wire their speakers will need to consider a different amp. Its replacement, the Halo A 21+, is priced a little higher at $2,995. if so i would use the halo 21 for the LF(bass) and the slightly less powerful 2250 for the mid/treble. The Parasound 2250 is one quality amp. We can’t remember the last time we reviewed a product such as this with bass and treble controls. magazine said hit the "proverbial home run." The A 21 amplifier is loaded with usable … I had it here, but did not made any meaningful measurements. If not, I'd go XPR-2. Parasound calls the Halo Integrated … but has been updated with a few new features, ca. Specifically, the A 21+ offers more impressive dynamics, a more accurate stereo image, wider stereo separation, and I heard more impressive control over my speakers' drivers on a regular basis. I am now scared. The A21 is still a very good amp but I am surprised that Parasound has not upgraded it. He owned an A21, the better more powerful version of this amp. I, for one, found the comparisons to Class D and to much pricier Class AB amplifiers enlightening. any chance you also measured parasound hint? Submit a ReviewContact Editorial Policy About us, Privacy Policy CCPA / GDPR Affiliate policy. Subjectively, it was more noisy (worse S/N). Competition and ComparisonsIf you're considering the A 21+, you're more than likely looking for an amp that is also Class A/AB. Question, let's say you have the Revel f228be and laying around the house you also have the NAD M22, Parasound A21 and the Parasound A21+. Anyone have measurements of the A21+? Its replacement, the Halo A 21+, is priced a little higher at $2,995. Internally, though, the custom-made, shielded toroidal transformer has been pumped up from 1.2 to 1.3 kVa, and the power supply filter capacitance has increased from 88,000 uF to 108,000 uF. Any comments on either welcome. But what, exactly, do you get for that extra coin? At first look the Parasound Halo A 21 is an appealing and robust amplifier accented by brushed metal finish. The Parasound may have a lower noise floor and lean to the warmer side of neutral which some(me also) perceive as more musical. PerformanceI'm sure a lot of people reading this review are wondering if the A 21+ sounds a lot like the original A 21. The A 21+ utilizes JFETs for the input stage, a MOSFET driver stage, and uses 16 beta-matched bipolar transistors for its output stage. 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. So which amp did you go with and why? So, depending on the power needs of your speakers and how hard you drive them, much of you listening will be done in pure Class A, with Class AB power provided only in particularly dynamic moments. You must log in or register to reply here. I've considered trying the ZBOX for my fronts. PARASOUND A21 AMPLIFIERS DESCRIPTION Halo A21 Two-Channel Amplifier 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 Current capacity: 60 amperes peak per channel Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt However, I also feel confident in saying the sound is not a carbon copy. i appreciate and respect all opinions so please feel to contribute. They can be switched out of the signal path when not needed, giving a slightly clearer sound. It was nothing to call home about. Both balanced XLR and unbalanced RCA inputs are available, with each channel still featuring its own independent gain control and RCA signal loop outputs. PC --> Topping D90 --> *Denafrips Hyperion* and Schiit Vidar --> Magnepan 1.7i and *Tekton Lore Reference*. Positive Feedback review - REVIEW. After auditioning several amps both recently and over the years I decided to stay with the Parasound … Curl also took a hard look at the A 21's circuit design and made several modifications, all aimed at improving performance and increasing sound quality. "The Parasound Halo A 21 and A 51 are top rate amplifiers at a great value. Your support is greatly appreciated! It's unlikely you'll find a pair of speakers the A 21+ struggles to power. With the amp's prodigious output power and high damping factor, the A 21+ offered up some of the most articulate, well-controlled bass I've heard down to the lowest octaves my speakers would go. If bass performance is of utmost concern, the A 21+ should be on your shortlist of amps to consider. I think a tubed pre-amp with the XPA amps would be a great place to start. The amp's size, weight, and heat output could pose potential installation problems, especially for those looking to place it in a cabinet or enclosure. Thanks, just noticed that's a pre-amp. "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. A21+ is supposed to have a few improved components over the A21 but the Parasounds will probably never measure as good as the Benchmark or good implementations of Class D. However, some people prefer it for its sound signature not as a totally transparent amp which the others would be. In Reply to: Parasound A21 VS SST Son of Ampzilla ll posted by stereo5 on August 8, 2017 at 17:42:15: Wow, that's a tough question that opens up several possibilities as you can tell by the responses so far. Additionally, Parasound's A21 just won a… Crosstalk and signal-to-noise ratio see improvements too, now rated at 70dB and 115dB, respectively. problem with channel imbalance induced by used Alps pot. Amp Parasound Zamp V.2 Ipod Classic Bocinas Advent Calypso. All of its high-power output is rated to be stable with speaker impedance dips down to 1.5 ohms. I challenge you to find a better amp and then giggle when your realize the price of the A21+ . One of the biggest gripes owners had with the A 21's chassis was the plastic end caps found on the faceplate. To facilitate this, the designer of the A 21, the legendary John Curl, was brought back in to make the necessary modifications. When you consider all that's included in the price, the A 21+ continues the high value proposition of its predecessor. Parasound classifies the amp's topology as high-bias Class A/AB. All the amp needs is a little less grain, a little more warmth and a … As a previous long-time owner of the original A 21, I feel confident in saying the A 21+ does in fact sound similar. I also have the A52+ driving 5 of the main channels in my HT setup. A used Pass Labs vs. Parasound Halo A21 - kelvinkwong0908@hotmail.com - Amp/Preamp Asylum Amp/Preamp Asylum ... it may be better especially in transparency. But what, exactly, do you get for that extra coin? Halo has earned honors and awards that are unmatched. The Rotel sounded very neutral and low. @zerodeefex warned me about the Parasound amps. Measuring conditions written in the graphs. The LED notification lights cannot be dimmed or turned off when the amp is operating. When you buy through links on our site, we may earn an affiliate commission. Subjectively, it was more noisy (worse S/N). The A21+ results look worse (to my eyes) and also distortion seems to be higher than that of A21 in my measurements. In practice, this means the amp is biased to output a little over six watts per channel of pure Class A power. Each of these stages features its own independent power supply and, in John Curl fashion, a strong emphasis on reducing higher-order harmonics has been made in the amp's circuit design, which Curl deems as the most detrimental type of distortion for sound quality an amplifier can have. Due to its design, the amp is always drawing power when turned on and needs to dissipate a lot of it as heat, so I suggest you place the amp in a well-ventilated area. After 15 years of devoted service, Parasound has retired its beloved Halo A 21 amplifier. The A21 has more power than I need, which is perfect, just in case I want to really crank it up. Build quality of the Parasound A 21+ is mighty impressive and handsome enough to fit into most décors. With its high-quality chassis, thoughtful circuit design, and excellent sound quality, the A 21+ offers an impressive value proposition. My qualified guess is that the integrated is worse than A21. Unless I'm mistaken, I could run through the ZBOX to implement tube sound. The amp is still offered in both black and silver finish options, and although at first glance the chassis appears unchanged, a few upgrades have occurred there as well. Parasound A21+ power amp $3300 - 300 watts of A/B, but stays in class A for most of your listening. I do have the Parasound preamp slated for review. f you have the room, I'd put my the XPA-1s up against the Parasound A21 any day of the week. Parasound Halo, ZoneMaster, Z Custom, and NewClassic are four distinct product families. The former tried and true, untouchable value and staple of their product line, the A21, had set the bar for value vs. performance in both the HiFi and Professional audio worlds. I just figure if the Parasound Halo Ax1's were fully balanced, differential designs, Parasound would explicitly advertise it as so. Maybe larger soundstage, fuller/richer mids. All measurements into 4ohm load. With that said, I found the most impressive part about the A 21+ was how it handled the bottom end. Parasound's Halo JC5 conforms to some of these stereotypes, but there's more to it than just slam There's nothing terribly unusual about a big, hefty US-made power amp: after all, it's almost an archetype of what we think the US high-end is all about. 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