the first one was an open box, basically BNIB from a local dealer, got a nice discount on it, it worked swimmingly for several month, and i loved it, best 4 channel i've owned without a doubt (minus an exception or 2)...it just went out one day, middle of session...i sold it for parts to a buddy who repairs amps, as i had another one lined up...
in the mean time i upgraded my secondary battery to a beefier setup, and re-calibrated the system to ensure that the digital terminals were accurate at the main battery as well as the secondary...
i even ended up buying a new, bigger better distro block, so essentially, everything minus wiring has been changed even before i installed the 2nd 200.4...
i got the new 200.4 from
sonicelectronix (sp), it worked for a month, and the SAME exact thing happen, the coil burnt up, but this time 2 transistors also went...
i connected my XT1600.4 to it and it has been working flawlessly for 2 months now...im just not 100% satisfied with the XT and wanted something a little bit better, a little higher fidelity if you will...
the amp is/was "mounted" in a floating box, it's cushioned and i even have 2 of those muffin fans routed into the bottom of the box to keep the amp cool (same as i do with my mono block)..and im fairly certain in the tuning...as for vibrations, it could be, im beating the hell out of my trunk with the 2 sx's i had and the mx i have now...
i figure if someone had something a few years old that was solid, i should be able to land it for a nice price, but like i also said, if it was a quality product, i would consider going the distance on price...