I love my new MB500, but thought it would have been nice to have the Eden 500 since I could use headphones and plug an audio device right into my amp. I tried something tonight that worked out kinda nice. Probably been done before, but I thought it was cool. I put my ear buds in from my pod and the put my headphones from my MB500 over top. Blended the volumes and had my silent practice while playing with music. I have both buds and phones that are cheap, but worked with only making the bass sound a bit muddy. Thought I'd pass this along in case no one posted it before.