As jl above points out a simple way to hear what a subwoofer is doing is to simply turn it off.
The REL method of speaker or high level connectivity was a solution to connect to receivers back in the day that lacked pre outputs. The assumption is using the same signal the speaker gets exceptional integration is guaranteed.
REL describes their product as providing bass extension and is not a subwoofer. In my experience their products ability to integrate and their bass performance is mediocre. Regardless of my opinion, if its connectivity and presentation appeals to you that's all that should matter.
Higher end subwoofers such as JL Audio F series and Velodyne DD Plus offer automatic equalization, room optimization, higher quality enclosures, drivers, and methods of speaker cone control. While these companies make a handsome product the majority of their extra cost is internal, design, and development. They will integrate with any speaker and last through system changes for years to come. If there's punch on the recording they'll punch and the only thing that will get spoiled is you.
The REL method of speaker or high level connectivity was a solution to connect to receivers back in the day that lacked pre outputs. The assumption is using the same signal the speaker gets exceptional integration is guaranteed.
REL describes their product as providing bass extension and is not a subwoofer. In my experience their products ability to integrate and their bass performance is mediocre. Regardless of my opinion, if its connectivity and presentation appeals to you that's all that should matter.
Higher end subwoofers such as JL Audio F series and Velodyne DD Plus offer automatic equalization, room optimization, higher quality enclosures, drivers, and methods of speaker cone control. While these companies make a handsome product the majority of their extra cost is internal, design, and development. They will integrate with any speaker and last through system changes for years to come. If there's punch on the recording they'll punch and the only thing that will get spoiled is you.