There are no need for a amplifier anyway, the Pioneer AVIC-F40BT Navigation works the same way as the standard untit

The combination of the Pioneer AVIC-F40BT Navigation and the Pioneer TS-E170Ci speaker upgrade also makes a almost unbelievably big difference in the sound quality and are worth the money

Only issue is that I’m not 100% sure that Pioneer have gotten the all the interface functions to the steering wheel controls right or it at least behaves a little strange

Volume, track change and mute works OK and they are the most important for me so all in all it works.