Been listening for a while now...Buttkicker Gamer2 100% recommended for bassheads worldwide that use an office/pc chair.
Chilling, drinking cold beers and playing one of this thread's favorites On My Level - Wiz right now.... Jesus Christ, unbelievably strong, strong body vibrations...The missing link for a complete bass experience with headphones whether you're listening to music, gaming, watching a movie. Look at the video review I linked earlier for a demonstration of the bass kicks/vibrations to get what I'm saying. For some reason I can't explain, it reacts even more strongly when I turn on Dolby Headphone + 7.1 Virtual Shifter (Luis U's positional layout) in Xonar Switch settings, even with just a stereo source. Basically, DH is a subwoofer and/or bass booster too or perhaps more likely, the repositioning of the subwoofer affects this change, it took getting the BK to realize this -- I used to think it just boosts treble when just listening from headphones.
Easy as hell to set up too if you have an external dac and amp for your headphones so the soundcard can output its analog signal to the Buttkicker's amp (outputting to 2 or more analog outputs from the soundcard requires other software installations). Low and/or High frequency cutoff settings on the amp via knob are incredible too so you can customize it based on what you're listening to (movie, music, gaming). This is explained more in the quick start guide. There's also clipping (****ing awesome) and signal status led lights.
Got it for CA$189.99 so US$150 on Ebay for faster shipping as it was out of stock from buttkickergear.com (manufacturer) anyway, turns out it was cheaper by US$30 than getting it from the manufacturer. And the item was sent directly from Ontario, Canada. Probably good Ebay deals out there for Americans too.