Pioneer has some awesome mid range cost HUs with dot matrix 3d display animations and lots of EQ features. But if you want to go high end id go with Alpine. To much stuff to write down about both of them would be here for hours comparing so many features between the two companies especially just a general overall view. As far as HU output no matter what HU it is you are pretty much going to get from 20 - 24 RMS output, that is the limit your battery imposes w/o another amp.
Why is Alpine so good? The preout voltage on premier is 6.5v vs. 4v in alpine. Many people choose Alpine and i'm trying to find out why? Is it because it has more settings?
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The technology and features to customize your sound preferance is very superior with Alpine HUs. The quality of their equalizers and HUs is among the best you can buy, to judge a HU by preout voltage is not a good way to go about things.
not to mention alpines tend to last forever. good reliability. I have alpine units from the 80s and early 90s still. both make good units. I own both pioneer premier and alpine gear, but if you want to see truly high performance, look at the Alpine CDA-7990. it's gorgeous.
a side note on pre-out voltages, most amplifiers can't handle more than 4 volts nominal input voltage, so anything higher will overdrive the amp's input stage unless the amp is designed to handle high voltage input signals. something to keep in mind.
yeah pretty much.. although I tend to use external EQs myself.. not the head unit ones. Zapco's C2K line handles 8V, not sure on the REF line, but they should.
