I installed these in my lake house with an old pair of B&W DM601s. They sound fantastic. Great job guys and gals.

Snubway improves sound stage and details and placement of the instruments on the sound stage. Using the combination of the Snubway and the Mainstream even further expanded the width and depth of the sound stage. Micro details become more evident.
Using both of these in the home theater provided better color saturation along with better overall sound!
In my 2 channel system the sound the sound became more holographic. A definite win-win for me. The more of these you add the more you'll gain.

There are two dedicated lines supplying power to my stereo. Each line has a Core Technologies power conditioner. I added a Main Stream to one line and a Snubway to the other. After two weeks of burn -in I can say with confidence that the results are positive and pronounced. There is more space around instruments and voices. The sound stage is deeper and wider. Most importantly to me is the entire presentation is more clear and focused. Best $600 I've spent on this rig!

Clearer sound and better separation of the music, heard more of the music.

Improvements were immediately noticeable. I haven't paid enough attention to whether they improved further in time.
What the mainstream did: a feeling of more power behind everything, especially noticeable in the bass and impact of drums. It feels correct and better, not just different, and the improvement is pretty significant.
What the snubway did: a more subtle improvement. First thing I noticed is a more accurate location of sounds. In general there's more subtle detail.
For context, I do have a computer with a switching power supply on the same group that I use to play music. Other than that it's only audio devices with lineair power supplies. I use the snubway to protect those, and use the mainstream for everthing. I did a few tests with positioning and this seems to work best. Mainstream: directly in a wall socket. Snubway: in the power distributor for audio devices.

While the name “BlackHole” might suggest a darker sonic background, what actually emerges is something more nuanced and refined: a greater sense of spatial transparency. The background doesn’t feel artificially suppressed or overly dark, instead, it becomes clearer, allowing micro-details and low-level musical cues to emerge with improved separation and natural flow.

In my system, this translated into a more open and well-layered soundstage, especially in the way background textures and delicate musical elements move through space. These aren’t simply more audible—they feel more natural and less masked by noise. It’s not so much about additional sparkle or overt enhancement, but about hearing the space between sounds more clearly.

At this price point, I think the LNBH offers impressive value, for those already fine-tuning a refined system, the improvements are meaningful. It’s about nuance (air, clarity, and space) not about shifting tonality or boosting dynamics. A welcome addition for systems that have already reached a certain level of resolution and are looking for the next step in quiet refinement.

Work great.

Bang for buck, this is the one for music. Cant go wrong with this. Thank you Vera-Fi!

I’m very impressed with the SDFB. I’ve used many high-end fuses before, but most tend to alter the tonality, introduce noticeable midrange distortion, and result in bloated, loose bass. In contrast, the SDFB preserves the original tonality while significantly improving bass performance—offering greater detail, tighter control, and a clear reduction in distortion across the entire spectrum. The soundstage also expands substantially.

I briefly compared it directly with a fuse-less setup and can confirm that while there’s a slight reduction in body and bloom, the SDFB is the closest I’ve heard to running without a fuse.

Incredible micro-details far back deep in the soundstage are now noticeable and distinct. Like another deeper layer of the orchestra opened up. And those details aren't exaggerated or brought forward...they are textured, clear, but delicate and further away (as they should be).

And the first time my system has properly rendered a piccolo (playing a high note) without any shrill glare that would previously cause it to sound artificial.

Same with triangle strikes. Very clean, round with no harsh edge.

I got both Main Stream and Snubway at the same time, and you can check my review there for my comments.

The only comment I want to add here is that they work well together. In fact, I think they are both needed to acheive the maximum benefit.

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.

Killer combination with SDFB

These folks responded to my request for a lost part by sending me the entire product at no charge. In 60 plus years in audio that’s a first.
They also have surprised me again recently, but I’ll save those comments for a more appropriate time.

Easy to use. Price lower than expected. Sound quality better than expected. Great product for new audiophiles and senior citizens. I’m using it frequently.
Nobody asleep at the wheel on this product.