Opinion's needed

http://www.cardomain.com/item/PHOTLD66

Thinking about getting this to boost my preout voltage (2volts). What do you guys think? Will I suffer any quality loss or gain? I know this will clean my signal up right?

I'd look at the Audio Control Overdrive line driver if I were you.  In fact...look at what I found here http:///.com/dll?ViewItem&category=79842&item=5723166912&rd=1

Here is the manual.

Output voltage on the amp is adjusted by the gain, so with as little as half a volt of input you can get the output voltage to those numbers.  But, when the amp is getting a signal of half a volt, or one or two volts...it has to amplify that signal to reach the desired output (by increasing the gain).  When the source signal is faint, the amplifier is increasing the signal-to-noise ratio when you adjust the gain to get that output.

Now, the idea of using a line driver to increase the source signal has to do with getting a better signal-to-noise ratio from the amp.  If it is getting a 6 volt signal (and the amp is spec'd to be able to use 6 volts input), then it has to do less amplification of that signal to get to the final result.  You should always try to feed an amp the strongest input that you can, for this reason.

It was asked earlier what problem you are trying to correct by looking at using a line driver.  Do you have the system up and running now, and is the sound unsatisfactory?  Do you need a cleaner signal?  If so, use the line driver and position it close to the head unit.  If there isn't any problems, and you are happy with the sound...leave it out of the equation.