Moving on, I went with an old pop favorite, The Wallflowers' hit "One Headlight" off their album Bringing Down the Horse (Interscope Records). "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 has nothing to hide here as these are real numbers supported by A21+'s capability of delivering 60 amperes of current per channel, the ability to deliver this power through the amplifier's full band-width, and a low <0.1% Total Harmonic Distortion (THD) when driving the full audio band (20Hz - 20kHz) at rated power. Bass and low mid-bass control was again exceptional, as was definition and presence amidst the high-frequency onslaught happening around it. For instance, it was easier to follow the gently rising and falling line of the lilting humming in “Latika’s Theme,” from the Slumdog Millionaire soundtrack (16/44.1 FLAC, Interscope). My reference Anthem Statement M1 mono amplifiers ($3750 each) have a midrange that is slightly clearer, making voices more present, and small vocal inflections and nuances more discernible. It also utilizes eight beta-matched, 15-amp 60Hz output transistors for each channel. It was a certainty; that this house full of speakers, was powered by a big Parasound wholehouse amplifier. This blend of qualities made it a joy to listen to. It's hefty, too, weighing a respectable but not unmanageable 65 pounds. Low-level detail was brilliantly fleshed out and, even when I dropped the volume to background levels, the experience didn't diminish, it merely scaled. By staying out of the way and letting me enjoy the music, the A 31 made this review a challenge to find new ways to say that it sounded wonderful. Explore more reviews in our AV Preamp and Stereo Preamp review sections.. Find a pair of Bookshelf Speakers or Floorstanding Speakers to drive with the A31. Que es muy buen aparato, que suena muy bien, que es muy digno y honrado. 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. B-Stock items are … As with my first tests, I have heard a bit more low-end oomph, but again, I tend to cross my speakers over at anywhere between 50 and 60Hz (80Hz for bookshelf speakers), so that uber-low bass is going to be dealt with by a sub and is only being pointed out here for evaluation purposes. Respuesta en frecuencia: 5 Hz - 100 kHz, +0/-3 dB a 1 vatio. It just so happened to not suck and live up to every expectation I had prior to its arrival. But if a three-channel amp is really not what you’re looking for, Parasound still has you covered, with their A 21 two-channel and A 51 five-channel versions of the same basic Halo design. Regardless, the A31 never wavered nor seemed to run out of juice. Is there a market for it? Regardless of the speaker choice, all were connected via 12-gauge bulk speaker cable from Binary, a SnapAV company. I think so, though undoubtedly traditional stereo and five- or seven-channel amplifiers will always be more popular than three-channel ones. Instead, other brands always offer rack ears as an optional extra, sometimes a costly one. The entire performance was one of terrific balance and sheer effortlessness. I installed the A31 along the bottom of my rack with the A21 resting above, though there are three or four rack spaces between the two in order to allow for proper ventilation. On Cyndi Lauper’s The Body Acoustic (16-bit/44.1kHz FLAC, Sony BMG), the various stringed instruments -- including a particularly steely guitar -- and the singer’s raspy voice can sometimes be a bit jarring, but the A 31 struck the perfect balance between vividly realistic reproduction of the acoustic instruments and a deft addition of just a touch of warmth to the voice. ALL B-stock items are all professionally inspected by Parasound technicians and, most importantly, ALL B-Stock products contain the exact same FULL Parasound manufacturer’s warranty. When you buy through links on our site, we may earn an affiliate commission. And when this album’s deep, sustained bass kicked in, the Parasound packed more punch, with a tight concussive quality and extremely low sustained tones. When more than three channels were needed, it was always paired with my Parasound Halo A21. On the other hand, the Krell Evolution 3250e has a slightly more spirited sound versus that of the A31, in that the Krell is a bit more dynamic and taut throughout. 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). 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While there was still plenty of detail, the explosive, metallic sounds of battle were a little forced and lacking in weight in comparison to the A 31’s smooth, effortless delivery. The A 31 is rated at 250Wpc into 8 ohms or 400Wpc into 4 ohms, all three channels driven throughout the audioband of 20Hz–20kHz. Front-man Jacob Dylan's vocals were presented in their full unaltered dry but sultry state. This is a decidedly pro feature, one I'll discuss in a moment. That last part is a big deal (for me at least), as I've encountered no other brand that does this free of charge. But while the M1 is a fantastic-sounding and amazingly powerful and revealing amplifier, the Halo A 31, for less than a third as much per channel, wasn’t far behind. Parasound at Rocky Mountain AudioFest 2017 - Stereophile review by Herb Reichert. item 3 Brand New Parasound Halo A31 Three Ch Power Amplifier Black - Retail $3,500.00 3 - Brand New Parasound Halo A31 Three Ch Power Amplifier Black - Retail $3,500.00. Parasound Products was founded in 1981, in San Francisco, by Richard Schram, whose mission was to provide value for the money to his customers. The A31's internal circuitry was designed by none other than John Curl, a longtime Parasound collaborator and designer extraordinaire, with more than a few hits to his name. There is even a loop out option for daisy-chaining several amps together if you so desire. Other features that jumped out at me were the track's many snare hits and rim shots, which were rendered with just a bit more detail and nuance throughout, compared to what had been provided by previous amplifiers employed in my system. During the numerous battle scenes, the metallic clanking and grinding of robotic exoskeletons, alien mimics, and powerful blasts from automatic weapons were perfectly positioned, while Christophe Beck’s low, pulsing music score effectively filled every bit of the rest of the soundscape. The A31 employs matched pairs of JFETs for its input/pre-driver stages and matched pairs of MOSFETS in its driver stage. Moving on to movies, I cued up a guilty pleasure of mine, the disaster flick 2012 (Columbia), on Blu-ray disc. Write a review. The sound of Willie Nelson’s To All the Girls . Ratings and Reviews. Parasound calls the Halo Integrated a … However, there are a few items worth noting before making your final purchasing decision. The A31, like all Halo-branded amplifiers, is a high-bias Class A/AB amplifier, meaning the first few watts - in this case seven - are delivered in pure Class A fashion before switching over to AB status. I recently upgraded my front speakers to B&W 804D3. The whole sonic spectrum was (largely) uncolored and sounded wholly natural to me, possessing zero grain, edge or other maladies that would've otherwise spoiled the performance. . I suppose as money became tight, people went back to all-in-one solutions, i.e., five- and seven-channel amplifiers or AV receivers. 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. $3,499.95. . The A31 is THX Ultra2-certified as well. Right away, the A31 proved exceedingly resolute in that it shone appropriate light upon every detail and nuance in a wholly convincing and natural way. Performance I began my critical evaluation of the A31 amplifier with some two-channel music by way of Moby's "Everloving" off the hit album Play (V2). Not to say that these weren't present via the A31, it's just that neither drew attention to itself in a "look at me" fashion. 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 says the Halo A31 was created in response to the growing demand to get a high performance, high power, three-channel amplifier. KONKA Announces Three New Android TV Series for 2021 Lineup. Around back, the Halo A 31 is equally impressive. Parasound has been making their Halo line of amplifiers for years now, mostly without change. And it had no trouble driving my speakers to any volume level I desired. Joe, a great concise summary of your journey and review of the A21+. Parasound has never offered a three-channel amplifier and, while three-channel amps are nothing new within the industry, fans of the company are probably asking themselves (and Parasound) what took so long. While there was still plenty of detail, the explosive, metallic sounds of battle were a little forced and lacking in weight in comparison to the A 31’s smooth, effortless delivery. This time, with the A31 having to play nice with its two-channel sibling the A21, I couldn't detect any dissimilarities between the two when using one for mains and the other for center and/or rear channel duty. Parasound Products, Inc.2250 McKinnon AvenueSan Francisco, CA 94124Phone: (415) 397-7100Fax: (415) 397-0144, E-mail: marketing@parasound.comWebsite: www.parasound.com, SoundStage! There are also two large handles, a mains power switch, and an IEC receptacle for the provided power cord. 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. When the world does literally begin to crumble beneath the characters' feet, the resulting sound was truly epic and, yet again, I felt as if I was able to discern more of it due to the A31's (and A21's) incredible clarity and definition throughout. I've gotten word of users with ten-plus-year-old Parasound amps still performing as well as the day they were taken out of the box and, while this reliability may cost Parasound some sales down the road, it does go a long way toward justifying the A31's slightly higher price point. The cracks of Ivan Vanko's whips were positively violent in their dynamic snaps and the resulting electrical crack was so vividly rendered that it made me shudder. Three-channel amplifiers were all the rage a few years ago, but then sort of faded away. Network. If I didn’t already own the Anthems, I’m not sure I’d choose them over the Parasound. From there, I connected the A31 to a host of different loudspeakers, ranging from my trusty Tekton Design Pendragons to a complement of Jade 1 bookshelf speakers from Wharfedale. Two-channel music sounds close to live, and the movies at home feel just like the theater. I was taken aback by the level of low mid-bass articulation that was present, which I found equal to that of its high-frequency performance. Those of you with seven-channel systems can still benefit from a three-channel amplifier, as it gives you the ability to run your front three speakers, while utilizing a pair of stereo amps for your surround and rear channels, which could be lesser amps in terms of power than what is required for your front three channels. For me, the A31 from Parasound's Halo line of products is aspirational but obtainable, in that it competes very favorably with far costlier competition, yet can be had by many with just a little foresight and financial planning. At first look the Parasound Halo A 21 is an appealing and robust amplifier accented by brushed metal finish. Like all Parasound products, the A31 comes with a full five-year parts and labor warranty in the United States and in Canada. : Measurements can be switched out of juice ’ m not sure ’! 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