Vera-Fi Audio LLC
Vanguard Caldera 10" Active Subwoofer
Vanguard Caldera 10" Active Subwoofer
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Product Description
Product Description
Powerful, Refined Bass at a Friendly Price
Low frequencies are the foundation of a full-range audio experience. Whether you're extending the low-end performance of your stand-mount speakers, adding punch and clarity to your tower setup, or bringing cinematic bass to your home theater, the Vanguard Caldera 10 delivers real-world high-fidelity performance at a price that won’t break the bank.
Deep, Controlled Bass Without Compromise
At the core of the Caldera 10 is a 10-inch driver powered by a high-quality Class A/B amplifier with a robust toroidal transformer linear power supply. This combination ensures clean, powerful bass response, reaching down to 30Hz (-3dB) and 27Hz (-6dB). The high-aspect-ratio laminar flow slot vent eliminates chuffing, delivering smooth, distortion-free bass with every note.
Effortless Integration into Any System
The Caldera 10 is designed for maximum versatility, offering both speaker-level and line-level inputs, allowing seamless integration into any system. Adjustable gain, frequency response, and phase reversal give you full control to fine-tune the subwoofer to match your speakers and room acoustics.
Sleek, Compact, and Built for Real-World Performance
Encased in a sleek black cabinet with beveled edges and an etched finish that catches light like textured steel, the Caldera 10 blends effortlessly into any environment. Its compact footprint (13” W x 15” H x 16” D) allows for flexible placement without sacrificing performance.
Experience the Vanguard Caldera 10 and hear what real, uncompromised bass sounds like—powerful, refined, and built to perform at a realistic price.
Priced at Just $199
Perfectly paired with the Vanguard Scout, the Caldera 10 offers unmatched performance and value. Try it for yourself—backed by Vera-Fi Audio’s 30-day money-back guarantee.
Looking for a deal? Ask us about our B-stock units, featuring minor cosmetic imperfections but the same uncompromising sound.
Specifications
Specifications
Driver: 10-inch high-excursion woofer
Amplifier Power: 175w Peak Power (High-quality Class A/B with toroidal transformer)
Frequency Response: 30Hz (-3dB), 27Hz (-6dB)
Dimensions: 13" W x 15" H x 16" D
Inputs: RCA line-level and 5-way binding posts for speaker-level input & pass-through
Input Impedance: 9.3kohm at the RCA input
Finish: Black cabinet with etched texture










I bought this to replace a Dayton audio 10 in sub. The first thing I noticed was it was smaller than the Dayton audio. When I went to change them out, the vanguard was a lot heavier. It must be a lot better braced. It also sounds way better. You don'thave to turn it up as high. Blends in well with the rest of my stuff.
Integrated well with my system and for my room size, I’m good with one.
Excellent sub!
This sub is a great value. I can’t think of any other sub in its price range that can compare.
I’m using my new subwoofer on a nice 2.1 system with some ELAC bookshelves. The ELACs sound great and the sub really rounds out the sound.
Super happy.
I am very pleased with this sub. I found a pair of AR8B speakers that I refoamed that ended up being very musical with a surprising soundstage but they lacked a bit of bass. This little sub turned out to be the perfect fit. I truely can't believe the sound I have coming from what has turned out to be a $240.00 investment for speakers and sub!! Could not be happier.
Bang for buck, this is the one for music. Cant go wrong with this. Thank you Vera-Fi!
Easy setup but auto setting needs work
I have always been reluctant to use a subwoofer with my Proac 1SC bookshelf speakers, but Mark assured me that 2 Calderas would blend beautifully with them and indeed they did. With the Caldara10s, the Proacs not only sound full range but the soundstage has opened up and the presentation is a bit more relaxed. I can’t believe they cost so little. I am truly impressed with the way the Calderas have improved my system. Thank you Mark for your expert guidance in helping me make this purchase. I couldn’t be happier.
This subwoofer pair was a curiosity buy as i have many other subs, but, it seems to have the right concoction for a very musical subwoofer on a budget. I purchased this pair for a second system. The paper cone and class A/B amp in this sub is part of the recipe for success. For sound quality, this sub beats out the REL subs with similar extension that are priced several times more. The designer of this sub is a genius for packing this level of bang for the buck in a budget subwoofer.
Give some time to break-in the driver.
Caldera 10 Reviews on YouTube

Nemo Propaganda
This $199 Subwoofer Sounds TOO Good for the Price!? Vanguard Caldera 10" Subwoofer Review!

Zero Fidelity
A Crazy Good, AFFORDABLE Audiophile Subwoofer!

GenerationBehindHIFI
A Look Inside The Vera-Fi Audio Caldera 10 Subwoofer - It's good! Really good!

TONEAudio
VERA-FI Caldera 10 Subwoofer Quick Look

The Listening Chair with Howard Kneller
Steven Stone reviews Vera-Fi Audio's $199, 10-inch Caldera Subwoofer!
Articles about Caldera 10

Headphone Guru
Caldera 10" wins 2024 Subwoofer of the Year awarded by Headphone Guru

Positive Feedback
The Vanguard Caldera 10 is literally the giant killer

Sound Stage! Access
This little box put out impressively large-scale sound.

Tone Publications
You’ll be impressed with how much this little sub can truly offer in terms of total system musicality.

Stereo Times
This sub is quite musical, far from a boom-boom box; it renders with a musical heart.

HiFi Audio Guru
The Caldera 10 actually increased the soundstage, giving the deep resonance that accompanies a massive hall.

Positive Feedback
A Follow-up on the Vanguard Caldera 10 Subwoofer: Dual Subs Now Equals Double the Fun!
Frequently Asked Questions (FAQs)
What is the Vanguard Caldera 10" Active Subwoofer?
The Vanguard Caldera is a 10-inch active subwoofer designed to produce low frequencies for a full-range audio system, adding more bass to your setup. The Caldera 10 is designed to provide bass enhancement for your audio system for frequencies below 120 Hz. There are built in adjustable frequency and amplitude controls for your own customization of the sound.
Where should I place the Vanguard Caldera in my room?
It can be used in a corner or center-loaded position. Experiment with placement to achieve the best bass response in your room.
Is the Vanguard Caldera compatible with any speaker system?
Yes, it is designed to integrate seamlessly with various speaker systems to enhance low-frequency performance.
How do I connect the Vanguard Caldera to my existing audio setup?
Yes, it can be used alongside other power conditioning devices like SnubWay and Swiss Digital Fuse Box to further enhance your system's performance.
What kind of improvements can I expect in my audio system?
Experts and users have reported that the Caldera 10 subwoofer enhances the rhythm and pace of bass-heavy music, providing a more immersive listening experience.
Where can I find Vera-Fi Audio warranty information?
You may find information about warranty here.
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When I added the LNBH and SSZ to my system, I installed them together, so it’s impossible for me to separate their individual contributions. After a long run-in period, the changes became so compelling that I found myself staying up late, revisiting every song I’ve ever loved.
One of the most striking improvements was the disappearance of noise-related limitations. With these two in place, details that were previously buried in the mix became clearly audible. I could hear the subtle sounds of a vocalist taking a breath or even swallowing, which added an incredible sense of realism to the performance.
The overall imaging feels more precise, with every element in the soundstage locked in place. Music flows effortlessly, and the presentation is so engaging that it’s hard to step away from the listening chair. This pairing improved the technical side of my system while also bringing a level of musical connection that keeps me listening for hours.

I recently replaced the stock fuses in both my SSZ and Tempus PSU with the Graphene Sluggo.
Even at the start there was a sense that something had shifted, but this is not the kind of upgrade that shows everything in the first hour. In my case it really came into its own after about 300 hours. The first 50 hours the treble had a slightly tighter character and the mid-bass felt restrained. Around 150 hours the presentation started to relax, with better flow and more natural layering. By 300 hours dynamics felt settled, micro-details became more apparent, and the whole system sounded more connected.
What stood out most to me was the neutrality and transparency. It does not push the tonal balance in any direction, it simply lets the system speak for itself. Highs extend cleanly without harshness, keeping fine texture and air. The midrange has a natural presence with good retrieval of subtle detail. Bass is well controlled, evenly weighted, and separated with clarity.
On the SSZ, highs became smoother while keeping resolution, and the soundstage felt more open in both width and depth. Vocals gained more dimensionality compared to the stock fuse. On the Tempus PSU, tonal balance stayed consistent, but resolution improved across the range, making instrument separation easier to follow.
Mark at Vera-Fi has been great to talk to. Every question I asked was answered with detail and warmth, which made the whole experience more positive.
After this I plan to gradually replace all the fuses in my system with the Graphene Sluggo. For anyone using SSZ or Tempus PSU who wants more resolution and detail without altering the system character, this could be worth considering.

Purchased a pair of Vera-Fi Audio Vanguard Scout bookshelf speakers to replace my Fluance XL8S bookshelf speakers in the living room 2.1 system and am glad I did. In Stick Season by Noah Kahan Noah's voice has a low-level echo seemingly caused by the recording space, and it was hard to resolve in my Fluance XL8S based 2.1 system. Now, with the Vanguard Scout based 2.1 system, that low-level echo is better resolved at the same, low volume level (67dB or so on average at the listening position, C-weighted). There is that and there's the fact they're gorgeous looking speakers in the room. Very happy with this purchase.

This sub is a great value. I can’t think of any other sub in its price range that can compare.

I've had experiences with three different sluggo options, the high purity copper version, high purity copper with a gold immersion, and the graphene sluggo. The graphene sluggo was far and away my no. 1 choice; graphene is the best conductor of electricity that exists, and the graphene sluggo has been vapor-deposited with a microscopic layer of the compound. Graphene is actually just a single molecule of carbon, and though the microscopic layer deposited on the sluggo is infinitely thin, it still transmits current at a 70% higher rate than either of the two other options. The sluggo uses the proven concept of "skin effect," where the lion's share of the current travels across the surface of the sluggo. The graphene sluggo was absolutely superior to anything else I had access to, you can read my original review here:
https://positive-feedback.com/reviews/hardware-reviews/vera-fi-audio-swiss-digital-fuse-box/?highlight=graphene

The Naiu Ella Stereo Amplifier is the only amp in my collection of gear that has an amperage rating higher than 10 amps -- that wouldn't allow me use the more flexible Infinity Fuse unit that's user-programmable. The Swiss Digital Fuse Box arrived in a black case as opposed to the usual silver case, which was a really good look! Hookup was easy, and I robbed the Core Power Piggy Tail from my analog system to hook the Naiu Ella to the SDFB. After it burned in for 24-or-so hours, I took an extended listen, and the SDFB in the system with the Ella amp now showed the same level of effortlessness and clarity I noted in my original experiences with it in my all-analog system. And my principal assessment of the SDFB remains consistent -- the Naiu Ella in the digital source system now plays with more control and limitless dynamics -- it's almost like a completely different, more powerful amplifier. Very highly recommended -- once you hear your system with the SDFB, there's no going back!

A more cost-effective, user-programmable alternative to the Swiss Digital Fuse Box! And the dip switches allow the user to customize it for amperage and fuse type (slo-blow or fast acting) for compatibility with a variety of devices. You're not limited to a single device (as with the SDFB, which arrives pre-programmed for a specific fuse type and amperage rating), and that frees you to experiment with other equipment, easily helping you decide if you need additional Infinity Fuse units. The only thing necessary for you to do prior to placing your order is to confirm the fuse dimensions and choose the Sluggo (that replaces the fuse) or an upgraded version. And the Infinity Fuse will work with any device with a fuse rating up to 10 amps. Highly recommended -- I've tried it with tube amplifers, DACs, and preamplifiers, and the IF really gets you closer to the music!

There are a couple of qualities of these subwoofers that I would like to comment on favorably. First, the coverage of the midbass frequencies, and in fact the musicality of the subwoofers, is remarkable for the price. In my room, the frequencies between 65 and 125 are suppressed by the room. The Caldara subwoofers compensate for this very nicely. Second, the visual appearance of the units is very nice.
Wow, I miss the ultra low frequencies that my old but no longer functional REL subwoofers provided, my music room does not really allow for reproduction of the frequencies between 20 and 40 Hz. The trade-off of musicality is therefore significant compensation.
I appreciated Mark’s generous offer to substitute the Caldera for the smaller model which was out of stock. If I can make one suggestion for future Caldera models, it would be to have speaker level inputs in addition to the RCA inputs.

Wow - I honestly wasn't sure if I was even a "bass guy" before purchasing 2x Caldera 12"s, and my Wharfedale Linton's even had already solid bass response, but in the endless quest for the "wow" factor, I was pointed towards Vera-Fi's subwoofer offerings.
Let me just say, I am absolutely blown away. I can't stop listening to my system -- it just sounds too good. I also have not experienced such remarkably good customer service from a company in quite some time. Thank you to Mark and the team for making such a reasonably priced product that punches far into much higher price points.

The Line Noise BlackHole (LNBH) sets the new industry standard for AC line noise elimination. In both my systems, the LNBH in combination with the Snub Station Zero easily bested the AudioQuest Niagara equipment that occupied both systems. If you can manage with a combined amperage total of less than 10 amps (that's much easier than most might imagine), these devices will shock you with the goodness they bring to your listening sessions. Yes, they eliminate AC-borne line noise, but the opens an entirely new listening experience, with incredible transparency and clarity, whether you listen to analog or digital sources. Very highly recommended, and maybe the most important product launch from Vera-Fi Audio yet!