So, I decided to see what was inside the MiDock portfolio, as I was quite underwhelmed by the quality of sound. It's better than my laptop speakers, for sure, but I didn't feel it was up to my expectations of a product with the Polk Audio name on it. I understand that the larger docks sound much better.
Anyway, to start with, I opened up the main amplifier casing. Two screws in the battery compartment, and 4 under the feet. What I found was... well... not much at all. Some caps, a few ICs, and that's about it.I wasn't expecting much, but boy it's sparse in there.
I then started poking around trying to see how to get the speakers apart. Finally got aggrivated and ripped off the speaker grill, exposing 4 screws at the bottom of each side, and three across the top. Took the speakers apart, removed the control board so it wouldn't get damaged, and proceeded to untether the speaker wires via a pair of cutters.
My next plan was to see if I could pop the amp. I wanted to see just what that little board could do. So, I hooked it up to my pair of EPI M50's. http://humanspeakers.com/e/epi50.htm
Obviously, this amp was not designed for such a load. The EPIs are 8 ohm nominal. But, what the hell, right? So I hooked er up, and was actually very surprised at the volume this little amp was able to produce. I was surprised that the bass was not distorted. However, I was running at 100% all the way across the board, hooked directly to my PC. One thing I did notice was that even at very low volumes, the high frequencies were very muddled. This is not an audiophile grade amp, then :). Also, after about 10 minutes of messing around with different music, I shut it all down, unplugged, and touched every component on the board... not a single one was even warm. There's a possibility that I may have been reaching the power adaptor's current limit to the board, thereby robbing extra power that could've been created. I'm going to dig around and find a higher amperage adaptor to see if I get better results.
Now, I decided to torture-test the speakers. They were reassembled, and wired into my Marantz 2220b receiver. http://www.classic-audio.com/marantz/2220b.html One thing I overlooked here is what resistance is presented to the receiver by these little speakers. I'm guessing that, like headphones, it's well beyond the range that the receiver would prefer to drive. As such, I had to turn the volume way over half to get a good amount of noise. Typically, driving the M50's, I only have to turn it halfway if I feel like blowing myself away from the desk. Anyway, hooked up to the receiver, the speakers tried really, really hard. They really did.... they move an impressive amount of air out of the top-mounted ports, but couple the plastic casing with bass-heavy music and two full-range drivers per channel... well... ass.
So I've narrowed my disappointment down to the speakers themselves. Not that there's any real big surprise there.
However, I was happy with the amp. If it weren't for the muddled highs, you might be able to fashion one into an interesting headphone amp. Sadly, the overall frequency response isn't there, I don't think.
I can post pictures of the destruction and mayhem if anyone's interested.