Audiophilepure

https://www.soundandvision.com/content/vera-fi-audio-vanguard-scout-speakers-vanguard-caldera-12-subwoofer

There’s simply no way a $400 subwoofer should be able to incorporate something like that, yet there it is. The amp is housed in its own chamber, physically isolated from the driver. That minimizes the potential for the backwave from the driver to cause long-term issues with the amp due to vibrations. It’s certainly an unusual find in this price class. There is a single horizontal cabinet brace, along with damping material on the top and both side walls. The front baffle measures about 1.5″ thick, the rest of the cabinet appears to be 3/4″ of an inch. There’s not much in this paragraph that you can say about most other budget subwoofers; generally speaking they aren’t able to incorporate features like these.

During my time with the Caldera I found the amp somewhat sensitive to certain appliances. Despite the subwoofer being plugged into a different electric circuit, whenever my microwave was on, or the refrigerator’s compressor kicked in, the sub produced a hum. It had a similar sound to a ground loop, but I don’t have that issue in my house. I did hear a slight hum in general everyday use, it was just more pronounced when certain appliances were active.

https://www.enjoythemusic.com/superioraudio/equipment/0625/Raidho_X26_Floorstanding_Loudspeaker_Review.htm

Somehow, the Raidho engineers were able to make these speakers’ bass more than “adequate” sounding, which is quite impressive given that these speakers use only two 6.5″ bass/midrange drivers in a relatively small cabinet. I sometimes use a small SVS subwoofer with some of the speakers that pass through this system. When I first set these speakers up, I assumed I would need to use the subwoofer to augment the low end. But it quickly became obvious that the Raidho X2.6 did not need a subwoofer. Audiophiles who only listen to extreme heavy metal or solo pipe organ recitals might be happier with a subwoofer in the system. But I did not.

Raidho’s X2.6’s two woofers are located below its ribbon tweeter, near the center of gravity of these speakers. These are not exceptionally large, yet the designers of these speakers were somehow able to endow them with enough excellent-sounding bass to allow me to enjoy all the music I fed them. This bass wasn’t the type with pumped-up mid-bass to make them sound as if the bass is sufficient. This was real bass, and any support they had with the mid-bass or higher added to the prowess of their transient response and realistic-sounding bass guitar and even the largest drums.