This is my 9th SDFB! I obviously like them!

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!!

Produit incroyable; service à la clientèle encore plus incroyable!!

These are the best value to sound for the price!

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.