Class-d audio power amplifiers an overview of revelations

EUR 3, The Evolution One is the embodiment of all the latest and best technology NuPrime has developed. From the power supply, amplifier circuitry, to a new highly advanced input stage; the Evolution One has been carefully crafted to achieve a performance that surpasses the Reference range performance in all areas. The Evolution One outperforms its predecessor in every aspect which NuPrime amplifiers are known for by having:. Our new generation of amplifiers have moved even further away from the cold, hard, flat and harsh sound typically associated with Class-D amplification. In addition, the Evolution One is able to create an enveloping ambience that reaches out and invites the listener to the music.

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Content:

• Why Revelation Audio
• Class D Amplifiers 101
• Son of Ampzilla II
• Innamorata
• My Rack System - It's complete and totally awesome!!
• I-Tech 9000HD
• Tri-Art Audio Series B System Review
• Rocking the Boat : Nord Hypex NC1200 Signature Amplifier
• AUDIOPHONICS LPA-S400ET Class D Stereo Amplifier Purifi 2x400W 4 Ohm

WATCH RELATED VIDEO: How does a class D amplifier work? (Udemy Course)

Why Revelation Audio

Tri-Art B Series Open 5 open-baffle speaker. Budget audio is like a cage match, with manufacturers pitted against each other in a battle to be declared the best value in audio. Two perennial loudspeaker contenders are Vandersteen and Magnepan, and for the sound quality each presents, they deservedly reap their share of customers.

The principles at each company must breathe a sigh of relief that their designs are so different, lest they engage in an even more painful battle. Imagine a professional fight in which a power lifter Vandersteen and a CrossFit champ Magnepan are going at it, when another contestant enters the ring.

This one is a hipster Tri-Art Audio. In the punishing contest for dominance, which one will emerge victorious? You guessed it, the hipster! Not possible? That conclusion would be wrong , and the reason why is because the disarming environmentalist design of the Tri-Art 5 Open masks a few brilliant technological advantages, including:.

Those other companies have their virtues as well, as must be conceded, and many customers love the combination of virtues they offer. But neither Vandersteen nor Magnepan offer anything like the combination of virtues seen in the 5 Open, and that combination of virtues is every bit as compelling, perhaps more so. There is a set of characteristics produced by an open baffle dynamic speaker that is not attainable by either box speakers or non-dynamic panels.

Note that I did not say difficult to obtain, but unobtainable. A typical dynamic speaker will not avoid box colorations. A panel design, be it magnetic or electrostatic unless hybrid , will not yield the drive and capacity to load a room like a dynamic speaker. Neither group has the image focus and density of a full range primary driver. Here, then, is the sum of the characteristics of an OB: power and frequency structure similar to a dynamic speaker, scale and openness similar to a panel speaker, and coherence and imaging similar to a speaker based around a full-range driver.

Who puts a GAIN switch on a power bar with a tube? Others followed, including why put GAIN switches also on the preamp and amp? Why use separate power supplies for a passive preamp and a Class D amp?

The biggest question of all was, why bamboo? I had things to do pertaining to finalizing items sought for review. Their form looked unusual.

I scanned them in a second, noting they were open baffle speakers — wait! Is that bamboo? I honed in on the sound. Not bad! Within an hour I was finalizing a plan to review several components and the speakers. This review period has strengthened my impressions and deepened my respect for this quirky bamboo system. Tri-Art Audio is a manufacturer that has seemingly come out of nowhere to enter the fray that is affordable HiFi.

A surge of magnanimity courses over me each time I turn on the Tri-Art system. With its passive Pre-Amplifier, Class D Amplifier, Power Bar and other bamboo-based products, an owner of this equipment is helping to save the environment! Well, perhaps not saving it, but depleting it at a slower rate. When it comes to bamboo as a raw material, discussion of depletion rate hardly applies. A plant that can grow up to 1 foot per day and has a replenishment rate of 5 years versus years for a hardwood is not in much danger of depletion.

Sixteen years ago, when my wife and I were disappointed to find that the bedrooms and living room of the older home we thought had oak floors and particle board underneath the carpet, we considered installing bamboo flooring, but it was a tad too pricey. Given that a majority of speaker cabinets are made of an MDF derivative, it is both an aesthetic and economic boon to see a speaker utilizing bamboo.

I have always been amazed that a plant so tasty as a sprout is agreeable for flooring, or speaker baffles, in maturity. Historically, I have paid little attention to calls for energy efficient audio electronics, primarily since I have compared several Class D amps over the past decade and found them wanting sonically. I do not leave any equipment running, as I have proven to myself that warm up except for some tube equipment is essentially a waste of energy and time.

My ears tell me that whatever such materials are supposed to add to the performance of the product, usually it is not enough to sway my judgment of their performance holistically. This system from Tri-Art drives home the fact that it is first and foremost the genre of speaker, then circuitry, wiring and drivers, not the fanciness of the chassis or cabinet materials that overwhelmingly determines the sound quality.

Tri-Art Audio likely has a difference of opinion with me on this point. My assessment of what works best in the 5 Open would have more to do with the fact that it is an open baffle with an attenuated full range driver, versus the fact that the baffle is made from bamboo. Regardless, it is a great choice for a contemporary and warm appearing speaker, and if the bamboo does add some acoustic warmth, more power to Tri-Art.

Over the decades I am beginning to lean toward the conclusion that a noisy cabinet is a detriment rather than an aid to a speaker. I find my attention steadily being drawn to panel and dipole speakers. Of the past five speakers I have owned, only one is a dynamic speaker with full cabinet, the Vapor Audio Joule White, and that is because it exhibits less of the hindrances of cabinets than most dynamic speakers. The appeal of the open baffle speaker to my ears has steadfastly grown over the decades.

Some people at Tri-Art know their craft when it comes to topology of components and selection of parts. Here is the first shocker in this article, regarding the little Tri-Art B Series Watt Amplifier: I have used more powerful Class D amps but have not used any more luxurious sounding, including the previously owned Red Dragon S Amplifier.

Such things contribute to the cognitive dissonance experienced when approaching Tri-Art products. Upon spying them, the audiophile is tempted to dismiss them as a niche product for people who are seeking a sustainable Earth and who are clueless as to HiFi sound.

To that end some of the seeming strangeness of the Tri-Art philosophy of component creation comes to the fore. While that is unusual, it is not a crazy idea; wool is considered a fine option for dampening walls in construction of dedicated rooms for audio and HT.

Also, if one makes a lighter component, some form of dampening material is a good idea, even if an ecological material. Things get curious in the Elements section of the website, under the subheading Sonic Purity.

And for good reason: we discovered during our listening tests that stripping away plastic wrapping removes the sonic characteristics plastic brings to the electronic component.

There are certain things in audio that I scoff at, such as seashells in a jar or a plastic clock to be placed strategically atop a component. Brass bowls and dishes I leave to the desperate or chintzy, and I declare them to be fundamentally off-base in system building. You will not find me spending my money on dots and spots, bowls and baubles to stick around the room, nor devices to slip onto cables. I have heard enough materials in dielectric, speaker cones, and cabinets that I do not subscribe to an audiophile version of Phrenology, that whatever material is used imparts an overriding sonic signature to the component.

For this reason, I respectfully pass on spending time with the provided Tri-Art Bamboo Cable Stands and Tri-Art Iso-Feet, which are composed of Sorbothane half circles held by bamboo cups and are to be placed under components.

Should Tri-Art leave the system with me for a while yet, if I have time I can experiment, but my time is best spent assembling another system, not placing footers. Steve and the team at Tri-Art may be disheartened to see that I am eschewing what they likely consider a critical part of their system. I suspect they will be disappointed that I did not fully implement every part of the chain.

Here is where manufacturer and reviewer principles and expectations part company. Some reviewers would gush over the more trinket-like elements of the system, and from my experience that would be poor reporting. It would present the tangential aspects of the system as though they were determinant.

I prefer to give a solid assessment of the elements that touch the power and signal paths, as these are universally important. When it comes to alternative methods of making components, I do not care if Tri-Art Audio soaked the internals of the Preamplifier and Amplifier in lemon juice, painted them with a DARPA anti-radar coating, or stripped the plastic from them. I care about how the component performs relative to its price.

When I reviewed the Wells Audio Innamorata Amplifier, I was appraised that as part of the upgrade over the Akasha Amplifier it contained Bybee products, which have been questioned as to their complexion and efficacy.

My simple assessment was that as this was not the only upgrade to the Innamorata, and the amplifier performed at a clearly higher level than the Akasha, it was worth the additional price.

That is how I assess the stripping of plastic from internal parts of the Tri-Art Audio components. Then again, I have been asking myself how in the world do they get this amazing sound quality from such seemingly inexpensive components?

For example, Tri-Art branded multilayer board with positive and negative isolated on their own layer and grounds on separate layers — four layers in total, very thick boards. Great attention in the board design was taken to keep impedance consistent 47ohms throughout the traces of the board with no hard corners to the traces. The passive design is a shunt volume using a motorized Alps Blue Velvet shunted through custom valued naked Vishay resisters.

All switching and loading settings are using best quality Elma switches. Also unique to our design is the use of super tweeters off the headphone amplifier section of the board for conditioning the internal box or room for an improved environment for the electronics. How utterly unexpected! I do not know that I have handled gear at this lower price point with so many high-end methods and parts. This revelation explains much of the surprising sound quality I hear from Tri-Art components.

Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Staff Contact. Print Article. By: Doug Schroeder March Interior — B Series 60W Amp. Leave a Reply Cancel reply Your email address will not be published.

Class D Amplifiers 101

In the era where everything in high-end audio seems to be wanting to pump up to the extreme proportions Alexander took the opposite, bold move and envision more of the 21st century high-end audio lifestyle products, that are compact, with pleasing modern minimalistic aesthetics and packed with practical functionality. Everything with Alluxity is done in discrete way, without global feedback and no parallel output transistors. Alexander wanted to simplify both design and functionality wise. The chassis were designed in a seamless way to be both neutral and easy to manufacture. The unibody shape is not only of contemporary design cues, but also highly practical.

Son of Ampzilla II

Exception: Greenland. By Lars Clausen, Denmark since BigCap PSU. Click We recently secured a limited supply of Rubycon These are regarded as some of the best sounding PCB mounted. Our top range PSU module is for a limited period sold with this type of audio capacitor. Click to Enlarge.

Innamorata

Collectively we test and review more hi-fi, TV and home theatre equipment than any other organisation in the UK, with hundreds of pages of editorial content published every month! Bass is well articulated, midband is crisp yet smooth and treble is beautifully detailed. The Silver 8 delivers a rewarding performance with everything you throw at it, and is sublime at the price. Review: Hi-Fi Choice

My Rack System - It's complete and totally awesome!!

Inside and out, the I-Tech HD is one of the most technologically advanced professional touring amplifiers on the market today. Building on the decades of innovation, invention, and insight Crown is known for, the I-Tech HD features five new patents — three on the power supply alone — giving you an amp that goes well beyond the expected. If any of the links above result in strange characters in your browser, please right-click the file to save it to your computer. Recommended for: Tour Sound. Channels 2 Sensitivity 1.

I-Tech 9000HD

Taurus is something a little different for Constellation. In building our power amplifiers, we tend to focus purely on performance. But after our "dream team" of the world's top audio engineers created the relatively compact Inspiration Stereo 1. And now we have Taurus, an amplifier that stands only 8. The heart of Taurus is a pair of high-output toroidal power transformers. By splitting the duties up among two transformers, our "dream team" was able to reduce Taurus's chassis size substantially, to the same height and width as the Inspiration Stereo 1. Taurus's chassis is a few inches deeper, though. We also added substantially more storage capacitance to support Taurus's higher power rating and to assure its dynamics are unrestrained even with demanding loads and high volumes.

Tri-Art Audio Series B System Review

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Rocking the Boat : Nord Hypex NC1200 Signature Amplifier

First off Wow very happy. The installation went smoothly without problems. I first became interested in grounding when I went to a Nordost demonstration at the Montreal Audio Fest last spring. Now to my review; the volume increased 1 notch very obvious no placebo.

AUDIOPHONICS LPA-S400ET Class D Stereo Amplifier Purifi 2x400W 4 Ohm

Made the music louder to not hear it. From folklore audiophiles. Someone wants to listen to serious music at home as in the hall. The quality of the equipment for this purpose is what the lovers of loudness decibels as such simply do not fit where sensible people have a mind, but for the latter, it comes beyond the price of suitable amplifiers UHF, audio power amplifier. And at the same time, someone has a desire to join the useful and fascinating areas of activity - the technique of sound reproduction and electronics in general. Which in the digital age are inextricably linked and can become a highly profitable and prestigious profession.

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