I'm really enjoying this subwoofer. It adds a deeper dimension to my listening experience, just as I hoped it would. Thanks to Mark and his team for great communication and a great product.

Really good uplift in soundstage, tonality and dynamics! No doubt about it or placebo!
The sound feels more pure!
At around 300 hrs like clarified by mark , the effect becomes very obvious!
I will probably go one for amp and one for streamer .
Bravo!

Like my Vanguard Scout's, the Ranger is a small speaker with big, beefy sound. Fits well in my small room. Love these Vera Fi Audio products. Thanks again!

Not just a tweak, but an incredible upgrade. Just throw that boutique fuse away.

I have a complete Spectral-system (SDR-4000, DMC-30SV, DMA-200-S2), in combination with a heavily modified Klyne phono stage. Over the past 10 years, I have invested a lot of money in improving the system, particularly in the cabling (MIT Oracle) and power supply. But no tuning measure - really none - brought about such an improvement in sound quality as the use of -currently - two SDFBs in combination with the Graphene sluggos.
The Graphene-Suggos are the only right choice - even with Spectral: The copper Sluggos sound too warm, upfront and lack resolution (at least for my taste); the Super Sluggo doesn't come close to the Graphe Sluggo in terms of naturalness.
My system has never sounded as good as it does now. To improve it further, I would have to spend at least 10 times the price of the SDFBs. Thank you, Mark, you are so great!

I have replaced all the fuses in my system and the difference is a noticeable improvement in clarity, tonality and I no longer have d to worry about blown fuses. Personally I prefer the solid copper fuses in my system. The nice thing is that there are different sluggos that offer different “flavors” to compliment different audio systems each offers a different and unique enhancement to the sound. I have found this approach to work better for me than purchasing high end fuses that can blow.

I thought ordering from an American company would be very complicated in terms of administration, communication, and delivery time. It turned out to be just as easy as ordering in the Netherlands, but with an 11-day delivery time.

I've recently replaced my B&W 705 S2 standmount and B&W ASW608 sub by a new B&W 704 S3 floorstander. Incredibly good speakers, especially considering the price. The dual woofers reach down to 48Hz, but I still missed that last octave. I was looking for a suitable REL sub but after seeing so many good reviews about the Vanguard Caldera 12" Active Subwoofer I decided to give it a try. I thought it would be difficult to get one in the Netherlands. However thanks to Ace from Vera-Fi, he managed to do that; my sub arrived on location in 11 days. The price-performance ratio is out of this world. I thank Ace for all his efforts and Vera-Fi for an incredible deal.

The Vanguard Scouts are exceeding every expectation I had about sound quality. Paired with the Caldera 10 sub, I have never been happier about an audio purchase! I would recommend Vera-Fi Audio to absolutely anyone and everyone!

I love these so much. Brought my old bookshelf speakers to life. These are awesome!

None

It works, and improves the sound.

Not as fast as amazon Prime. But they are worth the wait.

The sound is like warm maple syrup ...Clear and tasty. I am no expert, but I do know what I like. Cannot be matched by speakers costing way way more. The reviews I read do not lie,

These beauties punch way way higher than the price point. Awesome!