In my case, it's a necessary accessory to connect the SDFB to my CD player.
The result has been very good.
Rafael (BCN-Spain)
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.
Creative thinking lead to the creation of this product which is an excellent addition.
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.
This is one musical sub. No one- note flabby bass from this little guy. Very tuneful bass already, and it has only been playing at a low-ish volume for a couple hours. I know full well the quality and depth of the bass will only get better and better as it loosens up a bit. I have the Caldera 10 playing with a pair of Energy Veritas Mini Vs right now, but the bass has such good fidelity and is so fast, I will try it out with my Magnepan MG-12s in my main stereo set-up. This is a music first sub. It won't do the lowest octaves, but I rarely listen to big pipe organ music anyway. It is doing a great job with my music. For a small sub at such a small price, the Caldera 10 is a home run all day long. No kidding!
Produit incroyable; service à la clientèle encore plus incroyable!!
Great value at such a low price. Dynamic, quiet with great bass. Works well with the SDFB.
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.
The Caldera 10s blend nicely with my Wharfedale EVO4.2s (big bookshelf speakers). The 10s were initially a little boomy in my small room, but blocking the vents yields pleasingly crisp bass. I plugged my integrated amp & the 10s into a "smart power strip" - so that switching on the amplifier energizes the outlets for the 10s. I'm really pleased with my purchase, and I'm relistening to my whole collection to hear the improvement.
Having ordered and installed two of these in the past, one on my Lampizator DAC and the other on my PrimaLuna Evo 400 preamp, I was smitten as these devices made perhaps the largest difference in sound quality for the smallest expenditure I had ever made. So, two more were ordered for my tube mono block amps, they arrived, I installed and both popped as soon as the power was turned on. I contacted Mark and we both agreed that the inrush was too great for the delay so he graciouslly agreed to send me two more with an extended delay to fix the issue. As much as I’d like to say the second set worked perfectly they failed in the same way only it took a little longer. I once again contacted Mark and he then had his engineer get hold of me and we solved the problem by simply doing an amp draw at start up. The new units were designed to work with my amps start up draw and they worked perfectly. My thanks to Mark and his crew for taking the time and having the patience in dealing with this frustrating issue. Now, what have they done for the amps, all I can say is they have an extended range, I am hearing more music, there is a clarity that just wasn’t there before and I find myself listening far more than before. Very pleased with the purchase and very pleased with the company.
I suggest an amperage control to make this device adjustable.
Not a lot of subwoofer experience but after reading reviews by a trusted reviewer and based on affordable price, I took the plunge. Not regretting anything about it. My experience so far has been very satisfying.
If this is all the money you can eek out, you can quit looking here. I can't imaging any other sub that can perform this well for this price.
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.
Definitely one of the best investments I have made to my system. I would never have believed it had I not heard with my own ears. Everything opens up and it brings out details I have not heard before.
I will be adding more to my other components in the near future.
I am convinced that the Swiss Digital Fuse Box makes an improvement in the sonics of my system. The idea of an out-board fuse is novel, effective sonically and cost-wise the way to go.
I'm up to 5 SDFB now! The latest is for my DSPeaker X4. Cold out of the box with a new piggy tail, everything is noticeably improved. You immediately notice the ease of delivery, what we used to refer to as 'space between the notes' when describing analog vs digital back in the day. Over the next 24 -72 hrs, the sound continues to settle with improvements across the board. The balance appears to warm up, but with no loss of detail. The soundstage increases in all dimensions, images become more palpable, depth expands but with additional specifity. Most importantly, I am listening to many more recordings from start to finish including ones that are new to me. And appreciating all of the artistic nuances of singers, instrumentalists, recording engineers, etc. This product has finally stopped me from spending a small fortune each time I try to squeeze out a 1% gain in the performance of my system. These units have no peer. Well done Mark!
I’m based in the UAE, and we’re already in the heart of summer. While the temperatures rise, there’s still so much to enjoy—cool breezes by the beach, busy streets full of life, and even air-conditioned bus stations that make city life comfortable. That said, during this season, with all the cooling systems running constantly, our power grid can occasionally introduce high-frequency (HF) electrical noise.
About a month ago, I installed the SnupWay Noise Defender and Main Stream Line Conditioner from Vera-Fi into my unused power outlets. Initially, I was skeptical. I did notice cleaner high frequencies, but the sound felt slightly dry at first—something was happening, but not exactly what I expected.
I reached out to Mark L Schifter, and he encouraged me to give it 400 hours of continuous use. True to his advice, after four weeks, the system truly opened up. Now, the sound is natural, warm, musical, and full of depth and detail, with excellent transient response.
Even though I already had a solid power setup, Vera-Fi’s products added an extra layer of refinement—bringing out the best in my system despite the seasonal challenges. Highly recommended for anyone seeking to elevate their listening experience, especially in dynamic environments like ours.
Very surprised at the quality for the price.
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.
Really great speakers. And the best part: excellent customer service if you need anything!
The project scope and requirements were clear: significantly upgrade the audio portion of our family room video set-up without killer expense or upsetting my wife's aesthetic sensibility (listening room / office is all mine for aesthetic, rest of the house, not so much :)). Out went the old, but decent, stereo amp and a pair of well known and highly praised but LIFELESS budget speakers, in came a trio of VS's to go with the in-place Caldera sub (for a 3.1 system) and KAPOW! Life in the audio portion, dialog clarity, frequency extension, and more, fitting at last for the picture on an LG OLED TV. Mission accomplished thanks to Mark and his crazy helpful way of doing business. Buy a pair. Buy 6 pairs and give 5 away. You can't go wrong and what a great speaker for the budding audiophile in your life.
