I think for shitz and giggles I am going to play the blue tube preamp through my good headphones or see if I can rig it up to my stereo Adcom GFA-535 power amp and in to my JBL830s. Got a feeling the Yammy is just Meh!!! But I got it in a trade I only had $150 in and got the blue tube off ebay for $120, so if they sail on, not a big deal.
Most likely you don't like the preamp.
Most poweramps are designed to not color the sound. So garbage in= garbage out. That being said some poweramps have built in filters that can make things sound like turds if you aren't careful. I recommend disabling all of them.
Yamaha poweramps aren't very popular, could be a reason for that....
