Dan´s Data has put up a review on the RumbleFX Force Feedback Headphones

The all-hardware design of the RumbleFX ´phones means they´re easy to set up. Just plug them in, with the bass switch on the Feedback Controller set to the "off" position, and they work as perfectly normal headphones. Click the bass switch to the I position and you get a moderate amount of "Rumble"; move the switch to the II position and you get rather more.

Setting the RumbleFX ´phones up for a given application can involve a certain amount of volume and bass setting twiddling, but it´s not difficult to do.

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