I need to put in a speaker for my full-sized Dr. Who K-9 robot (see my avatar).
He is made of styrene and the speaker (about 3 inches or so in diameter) for his speech would go into the head. I'm also debating about putting in a 2nd speaker in the body for sound effects. The power will be from a 12v lead battery (which actually attaches to a power distirbution board that some of the R2 builders use).
I'd like to keep things as simple as possible with as little soldering as needed.
I have a few questions:
Is an amp needed? If so, how's this one? Are there ones that are any easier to wire-up? Specifically, it looks like I'd have to attach the raw EZ B output (I'll be removing the tiny speaker it comes with) to a plug to get the audio into the amp. It'd be nice to not have to do additional soldering.
If I do use 2 speakers, can the same amp power them both?
I won't be using a Sparkfun MP3 trigger now that the EZ B can take care of the sound files. Do I need a ground loop isolator anymore?
thanks in advance,