My Z1 has an intermittent problem with the front right RCA output. It loses volume and has tons of static. As a result of this, I have to just use the rear output to my amp, and I've lost the voice guidance audio since it only works on the front channels.

 

I was thinking of getting the external guide speaker. Is the Pioneer guide speaker any good? I have a diesel truck, and it would have to have a decent amount of volume for me to hear it well. Are there any other speakers that work other than that expensive Pioneer one?

 

Thanks