Vera-Fi Audio LLC

Main Stream - Master Class Dynamic Parallel AC Line Conditioner

$295.00 USD

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Plug Type US 3 Prong Schuko

Voltage 110v 220/240v

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Note: Shipping times for Main Stream can take 5 to 7 days.

Master Class Dynamic Parallel AC Line Conditioner

Main Stream is designed to improve the performance of your high-end audio or video system by reducing the amount of AC Mains-based interference travelling on the wires within your home. This interference is created not only by other components in the system, but also appliances and other electrical equipment elsewhere in the house. Sometimes even emanating from outside your home!

Of course, this interference is mostly in the RF range, but things like refrigerators, air conditioners and heaters, washers and dryers; anything with a big motor and put a pulse of energy onty your home AC line and it will be "felt" by other equipment within the home. The energy imposed on the line is absorbed or filtered in different ways, depending on the frequency band involved. Part of Mainstream's effectiveness is due to the multiple frequency bands it effects while utilizing a simple topology comprising a minimum number of parts.

Line interference can cause many undesirable effects; hum, hiss, hash, or buzzing sounds from your speakers, a slight vibration that can be felt through the chassis of your components or on the motor of your turntable, and on video displays as random lines, moving bars or fuzzy images.

These effects can be experienced individually or in combinations. It is interesting to note that oftentimes the effect (hum, for instance) is apparently reduced, but our bands of interest do not include these very low frequencies. We are reducing energy in a band that infers these types of noise reductions.

Main Stream is called a “parallel” line conditioner because you do not plug your component INTO it, but rather plug it into the Mains socket closest to the component. In this way the MainStream is never restricting the flow of current to your components, simply removing the interference it encounters on the line as the current flows by. And there is no limit to how many MainStreams you can use; a large system may best be served by several.

As you probably know, the other type of line conditioning is called "series". There are many (maybe most?) products out there which plug into the wall and then your component(s) plug into it. With these, the current must pass through the various filter parts on their way to your audio component, necessitating the internal parts being of both high enough voltage and current to support the power demands of the attached product(s). This makes these conditioners both larger and more expensive than a parallel type, and they are often designed to serve somewhat different needs, or sometimes one of just distribution and surge protection.

Mainstream uses a combination of reactive elements to create tuned filters designed to specifically reduce the levels of noise specifically known to interfere with your audio enjoyment. Our topology excludes the use of any type of resonant transformer as a wave shaping device, and rather only removes unwanted frequencies.

• Capable of reducing system background noise to vanishingly low levels.

• Reasonably priced,

• Milled extruded aluminum case

• Designed for a long life of continuous service

• A faint blue glow shows it is working

• Laboratory tests prove the effectiveness of MainStream via Fast Fourier Transform graphs

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Master class AC line Condtioner

I’ve had unit installed about 4 weeks now and really happy.

Master Stream and Snubway made a difference

They are as effective in lowering noise and revealing detail as the many I have tried in the past. However, they are making a little additional magic that no other plug-ins could provide. Music flows with ease and smoothness, but it is more than that. The PRaT was at its best playing from all my sources, and the music became more engaging. I also noticed the soundstage and instrument separation turned better and became more believable.

Excellent system upgrade

Didn't think the Main Stream would make a positive difference since I live in the boonies, with no neighbors. My home has a dedicated transformer on the utility pole. I was wrong. The Main Stream improved detail and the instruments have more color. Thankfully it doesn't decrease dynamics. Highly recommended.

The delivery was done a long time ago, but due to the internet line at home being down, I was only able to set it up and test it today. It’s truly impressive. It feels like the sound has come alive. I can’t believe how much of a difference this one thing can make.

Big Difference

Back in my audio years (70's 80's and 90's) no one talked about AC line filtering. We sold a "power conditioner" from Monster Cable but all it really did was compress the music! I don't think anyone really knew anything about what was on the AC line and how it affected a system's sound quality. But back then, customers balked when we suggested that they upgrade to a 12 gauge power cord for an extra $45!

I have auditioned a few of your competitor's products and while they did "something" none of them made as big a difference as your two filters. You have every right to be proud of your products as they really make a significant difference. I wish you every success in marketing your filters in a field that is crowded with voodoo clones some of which selling at stupidly high prices!

Master Class Dynamic Parallel AC Line Conditioner

Using it in 2 systems, paired with the Snubway. In both systems, a 2.1 and an 11.2 Home Theatre, I’m getting more dynamic music and soundtracks, with dead silent backgrounds. Brighter, cleaner, and immensely enjoyable.

Definitely improves sound quality.

I used this in conjunction with the snub way noise defender. Bass is fuller, treble is sweeter and instrument separation is enhanced. Overall a noticeable improvement in all aspects of sound quality. My system is: Zu Audio DW6 superfly speakers, HiFi Rose RA 280 amp, Denon DCD1700 ne CD player, Eversolo DMP A6 streamer, Schitt Jotunheim II headphone amp and Audio Technica ath WP-900 headphones. Cables/interconnects are Zu Audio Mission II's.

Thrilled

After I installed Vera-Fi's Main Stream, SnubWay and the Swiss Digital Fuse Box, my patient wife asked me if I was happy with my latest upgrade to my power tube sound system. I answered in the affirmative, I'm thrilled! She knows how hard I am to please when it comes to what my ears hear. I'm always trying to get that last percentile of quality out of my stereo. And right now I couldn't be happier. In closing, CroTone Tubes are the best sounding tubes made in the USA.

Spectacular

So…
I plugged the Mainstream and Subway, sat and, well nothing! No change at all. A little disappointed to say the least. And then, literally a couple minutes later it began and increased over the rest of the evening. By the end of the week I was astounded and promptly ordered two more! Improvements across the board, most noticeable was a greater musicality, richness and body to the music. More natural, less harsh or forced.
When the second set arrived it was the same thing. With two pairs in my system now, it’s a component level change. Once of the best improvements for the costs ever. Thank you

Rediscovering Musical Textures with SnubWay and Main Stream

After integrating both the SnubWay and Main Stream into my system for an extended period, I can confidently say they have become indispensable components in my setup. From the very beginning, the improvements in low-frequency articulation and control were immediately apparent. The bass not only gained in weight and presence but also exhibited a remarkable refinement, offering better layering and definition without overwhelming the rest of the spectrum.

The SnubWay contributes by subtly reducing background noise, allowing micro-details and textural nuances to surface more effortlessly. Meanwhile, the Main Stream enhances the power delivery with a natural, unforced energy, resulting in an organic flow to the music that feels both more vivid and coherent.

What impresses me most is the way these two devices elevate the emotional engagement of listening sessions. The system now breathes more easily, with a blacker background, sharper imaging, and a more lifelike presentation across genres—from classical orchestration to complex jazz ensembles.

It is rare to encounter accessories that make such a profound impact without altering the core character of the system. I am truly grateful to Mark for offering these outstanding products, which have taken my system's performance to a new level of musical realism and immersion.

1 2 3

Main Stream Reviews on YouTube

Audio Pursuit gives Main Stream the Tesla award alongside SnubWay

Vera-Fi Main Stream Quick Overview

Budget-Friendly Power Conditioners: Snubway & Main Stream

Articles about Main Stream

Tom Gibbs awards Main Stream and SnubWay for 2024 Writers' Choice Award

Main Stream wins 2024 Accessory of the Year awarded by Headphone Guru

Main Stream provide the kind of overall improvements you'd expect to pay through the nose for.

The Main Stream will make a similar contribution to your system just like fine-tuning your speakers for optimum placement and turntable setup.

The Main Stream brought me ever closer to the music while providing a more nuanced performance.

The Main Stream is an incredible value and an extremely simple way to improve your audio system without introducing any negative effects.

I can’t think of any other product that improves recorded music as dramatically as Main Stream.

Main Stream has worked wonders in my all-analog system.

Master class AC line Condtioner

I’ve had unit installed about 4 weeks now and really happy.

Master Stream and Snubway made a difference

They are as effective in lowering noise and revealing detail as the many I have tried in the past. However, they are making a little additional magic that no other plug-ins could provide. Music flows with ease and smoothness, but it is more than that. The PRaT was at its best playing from all my sources, and the music became more engaging. I also noticed the soundstage and instrument separation turned better and became more believable.

Excellent system upgrade

Didn't think the Main Stream would make a positive difference since I live in the boonies, with no neighbors. My home has a dedicated transformer on the utility pole. I was wrong. The Main Stream improved detail and the instruments have more color. Thankfully it doesn't decrease dynamics. Highly recommended.

The delivery was done a long time ago, but due to the internet line at home being down, I was only able to set it up and test it today. It’s truly impressive. It feels like the sound has come alive. I can’t believe how much of a difference this one thing can make.

Big Difference

Back in my audio years (70's 80's and 90's) no one talked about AC line filtering. We sold a "power conditioner" from Monster Cable but all it really did was compress the music! I don't think anyone really knew anything about what was on the AC line and how it affected a system's sound quality. But back then, customers balked when we suggested that they upgrade to a 12 gauge power cord for an extra $45!

I have auditioned a few of your competitor's products and while they did "something" none of them made as big a difference as your two filters. You have every right to be proud of your products as they really make a significant difference. I wish you every success in marketing your filters in a field that is crowded with voodoo clones some of which selling at stupidly high prices!

Master Class Dynamic Parallel AC Line Conditioner

Using it in 2 systems, paired with the Snubway. In both systems, a 2.1 and an 11.2 Home Theatre, I’m getting more dynamic music and soundtracks, with dead silent backgrounds. Brighter, cleaner, and immensely enjoyable.

Definitely improves sound quality.

I used this in conjunction with the snub way noise defender. Bass is fuller, treble is sweeter and instrument separation is enhanced. Overall a noticeable improvement in all aspects of sound quality. My system is: Zu Audio DW6 superfly speakers, HiFi Rose RA 280 amp, Denon DCD1700 ne CD player, Eversolo DMP A6 streamer, Schitt Jotunheim II headphone amp and Audio Technica ath WP-900 headphones. Cables/interconnects are Zu Audio Mission II's.

Thrilled

After I installed Vera-Fi's Main Stream, SnubWay and the Swiss Digital Fuse Box, my patient wife asked me if I was happy with my latest upgrade to my power tube sound system. I answered in the affirmative, I'm thrilled! She knows how hard I am to please when it comes to what my ears hear. I'm always trying to get that last percentile of quality out of my stereo. And right now I couldn't be happier. In closing, CroTone Tubes are the best sounding tubes made in the USA.

Spectacular

So…
I plugged the Mainstream and Subway, sat and, well nothing! No change at all. A little disappointed to say the least. And then, literally a couple minutes later it began and increased over the rest of the evening. By the end of the week I was astounded and promptly ordered two more! Improvements across the board, most noticeable was a greater musicality, richness and body to the music. More natural, less harsh or forced.
When the second set arrived it was the same thing. With two pairs in my system now, it’s a component level change. Once of the best improvements for the costs ever. Thank you

Rediscovering Musical Textures with SnubWay and Main Stream

After integrating both the SnubWay and Main Stream into my system for an extended period, I can confidently say they have become indispensable components in my setup. From the very beginning, the improvements in low-frequency articulation and control were immediately apparent. The bass not only gained in weight and presence but also exhibited a remarkable refinement, offering better layering and definition without overwhelming the rest of the spectrum.

The SnubWay contributes by subtly reducing background noise, allowing micro-details and textural nuances to surface more effortlessly. Meanwhile, the Main Stream enhances the power delivery with a natural, unforced energy, resulting in an organic flow to the music that feels both more vivid and coherent.

What impresses me most is the way these two devices elevate the emotional engagement of listening sessions. The system now breathes more easily, with a blacker background, sharper imaging, and a more lifelike presentation across genres—from classical orchestration to complex jazz ensembles.

It is rare to encounter accessories that make such a profound impact without altering the core character of the system. I am truly grateful to Mark for offering these outstanding products, which have taken my system's performance to a new level of musical realism and immersion.

1 2 3

Frequently Asked Questions (FAQs)

What does the Main Stream Master Class Dynamic Parallel AC Line Conditioner do?

The Main Stream reduces a broad spectrum of AC noise, allowing your system to achieve ultimate performance.

How is the Main Stream different from other power conditioners?

The Main Stream is a plug-in filter that increases the blackness of one's audio system, enhancing sound quality without introducing any negative effects. It concentrates its effects mostly between 10kHz and 20kHz where problems with AC Mains tend to show themselves.

Is the Main Stream easy to install?

Yes, simply plug the Main Stream into an outlet on the same circuit as your audio equipment. Main Stream is fine in Power Conditioners as well. Main Stream is also a parallel type filter so can be plugged into any available free power socket in your system.

Can I use the Main Stream with other power conditioning devices?

Yes, it can be used alongside other power conditioning devices like SnubWay or other products like Puron etc.

What kind of improvements can I expect in my audio system?

Experts and users have reported a darker background, revealing more detail and ambient cues, expanded soundstage, and tighter, deeper bass.

Where can I find Vera-Fi Audio warranty information?

You may find information about warranty here.

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Main Stream - Master Class Dynamic Parallel AC Line Conditioner