The Parker Audio Trogs are a newly designed sub system that is designed to augment the bass output of smaller bookshelf speakers like the Trolls, and systems that may need the help of some added bass response.  The system utilizes a 7" woofer with a sandwiched pure aluminum cone.  This rigid cone structure mated with the powerful motor produce deep clean articulate bass in a nice tidy package!  The low end response of these subs extend down to the 30Hz range.  This is achieved by using a tuned port system.  The system can be used with a single sub, or you may opt for a stereo pair to produce added bass response.  These subs are designed to be used with an outboard amplifier of your choice.  There are many "plate" type amps on the market that will drive these very well.  Some of these "plate" amps offer remote capability which enable the listener to dial the gain and crossover frequency in from their listening position.  You can also use a mono or stereo amplifier with a suitable crossover to drive these subs.  These are the same subs that are used in the Highly acclaimed Crusader speakers. 

The Parker Audio Trogs are the perfect choice for the music lover who would like to add clean tight articulate bass response to their systems.