Summary: I have the 400msx which is just a mono version of the 400sx. I have this wire up to 2 MA Audio subs wired for a 2 0hm load and crossed over @ 80hertz w/ 7-8 db of bass boost. This thing makes those subs pound harder then any amp I've had this these subs hooked up to. I'm using the stock headunit hooked up to the high inputs so I haven't found out it's true potential yet.
Summary: not a bad amp, i got it powering two audiobahns and it gets really loud, it does dim headlights and neon lights but it throws out good power for the price! if running subs bridging this amp is the best way to go alotta power,probably puts out around 300w peak to each of my subs pretty good amp, cheak out my amp and install,@ http://www.sounddomain.com/member_pages/view_page.pl?
Summary: Just wired up my 800sx with three MTX thunder 6000's. What a bang!!!!!! Great amp pushing 600 watts to my three tens wired in parallel for a 4 ohm impedance. With the gain at 1/4 my Impala became a high powered vibrator. Great look, great price, and even better preformance.
Summary: overall this is a really cool little amp if your going to run a set of 6x9's or some door speakers.but when i tried to run my 2-jbl 1041's(10")it had problems....when wired standard it had no "push" and it dimmed the headlights(even though it is wired directly to the battery.when in briged mode and wired "in series" with the gain at almost 3/4's it kicked goooood!and the headlights didn't dim anymore. but when pushed hard it runs red hot! and shuts down in @20 minutes.