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Discussion Starter #1
I see some of this indash come with preouts at different ratings

2v, 3v, 4v and wow 5v. What is the difference and why would I want the more... My current kenwood kdc 232 has 2v and my last one the kdc 619 had 1.8v...
 

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The higher, the better. The higher the pre out voltage, the stronger and cleaner the signal going to the amplifier is. While results in not having to turn th gain up as much, and the amplifier doesn't work as hard, usually increasing its lifespan. Look at some Eclipse decks like my CD 8445, it has 8v preouts.
 

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Discussion Starter #3
well, the most ones i see have the 2v, my kenwood has 2v, but will changed it for the ez500 that has 4v. so that will double my power, kinda of
 

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It doesn't double the power, it increases the signal.

It gives you a better S/N ratio.

And as said, it allows you to keep the amp gains turned down to keep the amp running cooler and with less distortion.

If you plan to use an amp, then I highly suggest 4v. The 4v units will only be around 2.5v at the highest unclipped volume setting; which is generally about 75-80% of full volume for most HUs. (the voltage output is logarithmic)
 
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