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.

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