Отзывы о Интегральный усилитель стерео Pioneer A-20
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The red power wire gets constent power and there is a purple wire out the back of the 3200BT stereo unit that gets connected to the reverse lights power. Now it works in reverse as well as being able to view the trailer as we travel down the road. This unit not only assists you to park, it works great for hooking up to the trailer.




Set-Up: 5/5
Price: 3/5
Sound Quality: 2/5

Some tips from my experience.
Turn key to acc and turn off fans, etc. Push source button until system turns off. Plug in mic. Don't turn back on. Instead, choose menu button on screen. Then choose auto eq.
Note if you have bypassed parking brake the relay will not charge when off. Just temporarily ground brake wire to chassis until finished.
I am a musician by trade with two music degrees and this is the best auto audio setting I have heard in my truck! Basically like having a RTA in your vehicle. Highly recommended.


So far it has worked flawlessly. The signal from my glass antenna is perfect and I have had no dropouts. The sound quality is on par with a CD and much better than XM, FM, and of course AM.
My only complaint is with the presets on the head unit. They show up as preset 1,2,etc instead of the station name. This may be more of an issue with the head unit but its still annoying as the XM presets show up with the station name.
One thing to keep in mind. If you have a glass based antenna please make sure you follow the instructions about hooking up the amp turn on lead from the head unit to your antenna power wire on your factory or aftermarket harness. If you forget that you will not receive a very good FM/HD signal and little to no AM signal.

Equipment super easy to install. It comes with all what you need for a straight forward installation and instructions are self explanatory


The only real disappointment is the integration with the Pioneer head unit. It's as if the two product teams never talked to each other. The head unit behaves strangely if I leave it on HD Tuner when I turn off the power. So I switch to AUX 1, CD, or USB before I turn off the ignition and then everything is OK. Otherwise the stereo doesn't turn on at all (have to turn it on) or it turns on but the display is all messed up.
The install was very simple. No complaints there.
One big improvement would be a pass-through setting. It wouldn't take much engineering to change it so that you could pass the antenna signal straight through to the head unit in areas where you don't have any HD signal or where the signal is weak. Then you wouldn't have to listen to the tuner fighting itself over deciding which band to use.
But when it's working, it sounds AMAZING. The FM quality is top notch and the AM quality is dazzling.
UPDATE 8/5/10
One more gripe (or "suggestion"?) is that the HD tuner isn't actively tuning unless it is the current Source from the head unit. So if you switch from CD to HD Radio, it takes a few seconds for it to search and tune in the signal. Why?!?!?! As long as there's power from the head unit, it should keep working away and pulling in the best possible signal so it's ready to go whenever you switch to that Source.
I've also noticed a bug where the signal cuts out and that locks up the tuner. The only way to wake it back up is to power off the head unit and turn it back on ("reboot" the stereo).
Again, very poor integration.



The head unit still works fine but finally gave up and removed the hd radio add on module. Its just not ready for prime time. If you want HD radio, get a head unit with it built in.


Bad reception, volume constantly fluctuates when on digital signal, not the antenna (reception was perfect on old radio).
displays only 1 line of information, yet when antenna is plugged into head unit, it shows 3 lines of info.
Pathetic job by pioneer!!!!!!!!!!!!!!!!

1- to access the Auto EQ setting you have to turn off the power completely.
2-If you have an outboard amp make sure you jumper the turn on so the amp is turned on
3-Make sure all is quiet and fan is turned off.

Pioneer GEX-P20HD HD Tuner
Mated with a DEH-P6900ub head unit.


Oddly enough I'm getting digital reception in places where I used to get very poor analog reception.
Speaking of which, analog reception is considerably worse than the Honda factory head unit that it replaced but around the San Francisco area the digital signals are pretty reliable.
The dynamic range is far wider in HD vs FM, once it locks on digital the tweeters open up and the bass kicks quite a bit lower--love it
HD radio (1/2 channel split) is higher quality than most podcasts over my iphone but certainly worse than 320kbps mp3

This HD Tuner work great not only do you get clear channels but you get muti channels on the same frequency need I say more,
Regards Craig
