AppleBonker wrote:
There are more tuning options if I'm not mistaken. Also, the 2 volt vs. 5 volt preamp out outputs are extremely important if you plan on adding an amp at any point. The 8120 is just a far better unit. Don't get anyone wrong though, the 5120 is still a very impressive head unit in its own right.
I'm also biased to having the larger screen with the loading slots behind it. Looks much cleaner IMO.
everything Applebonker just stated is correct... and I agree that for the average user, the 5120 is still a nice unit...
I will try to explain a few of the differences..
Dolby 5.1 surround sound:OK, I love watching movies in my car. That's one of the biggest benefits of having an aftermarket unit, vs the factory one. Well this unit will decode and play movies back in Dolby 5.1 Suround sound. THus, if you have a center channel speaker in your car (like the premium package vehicles have), then you can use that, and play your dvd's back in true dolby surround sound. You can do this the easiest if you keep your factory Bose amp and speakers intact. I replaced all of my factory speakers and Bose Amp, but was still able to maintain use of this center channel speaker specifically for my Dolby 5.1 playback. (But I have 4 amplifiers hooked up in my car that allows this! 1 mini amp for the center channel speaker. 1 4 channel for my front midbass and rear 6x9's, 1 4 channel for my tweeters and 4" midranges, and one mono amp for my sub
Ok, but I digress, the second benefit is the 6 RCA outputs as opposed to only 4 for the 5120.
This allows:1. Use of the center channel for 5.1 surron sound2. Seperate subwoofer (non fading) RCA output in addition to RCA outputs for the front and rear.With the 5120, you could add an audio processor, or you will have to choose to either use the rear RCA's for the subwoofer, and set the system to rear non fading, or not have a sub, and simply have amps for the interior. Well, you could always use the speaker wire high level outputs for the rear, hook them up to a high low converter, and use then use the rear RCA's for a subwoofer. That could definitely work just a bit more complicated. AGain, you don't need to worry about all of this with the 8120
Next, the screen is larger, and hides the dvd insert slot on the 8120. And you've already mentioned the built in bluetooth.
THere's also an additional seperate USB input on the 8120, and the 8120 has a built in 13 band crossover for center, front, and rear speakers. In addition, things like built in time delay for each individual speaker, the ability to set the vehicle type on the reciever (compact, normal size, truck, SUV) allows for the acoustics to be changed and finely tuned. THere's the ability to set each speaker level to seperate volumes, and the ability to hook the unit up with a Kenwood excelon amplifier makes for amplifier adjustments from the headunit. The ability to control and memorize screen tilt angles, built in storage of your phone's phonebook, ability to send SMS text messages from the reciever, ability to control external units such as fog lights, underbody lighting, interior lighting, etc.
I haven't actually covered all of the differences, tehse are just a few that I could remember off the top of my head. Right now, as a stand alone unit, there is no other unit as good as this one. Alpine's units compete very strongly due to their ability to seamlessly intergrate with their aftermarket audio processors, but no other unit compares with the DNX-8120!