Instruction: Extract information from the supporting document to answer the given question.

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Question: Could I use two of these, one per channel, and get 30w per channel?
Document: If you do have to use battery power: get an 8 AA battery holder, some wires, an appropriate DC plug, and wire your own external 12V source to plug into the back of this amp. Again, the audio performance is excellent.BTW: the advertised 15W/channel rating is for 4 ohm speakers. If you use 8 ohm speakers, the power output will be reduced by a factor of two (to approximately 7W/chn... which is still a lot.....
It won't hold up driving your main speaker setup but, as many of the other review say, if you have reasonably efficient speakers, you'll get a LOT of good sound from a tiny and extremely cheap package. As a side note, I also bought an Audiosource AMP-100 for two additional zones (it has "Speaker A" and "Speaker B" switches) and this little amp sounds about as good as the AMP-100 when driving one set of speakers.
I was losing a channel on my higher-end Yamaha and thought I would try this out  I figured I'd have a portable amp for outdoor use if it wasn't up to snuff.I ran one channel from my source to the Dayton to do a side-by-side comparison. Within a few minutes, I unplugged the Yamaha and placed it under my couch!I've stuck with the Dayton for daily listening for a month and am quite happy with it!
I have two of these. One I use to power my rear speakers on for my computer surround sound. The other I installed in my workout room. It is powering two satellite speakers and a SUB and it ROCKS out.
The volume was easily adequate for a serious event, though I can't vouch for the battery life. The one complaint about this product is that it is EXTREMELY hard to get the batteries in properly. However, I'm not sure how many people will use it in a mobile application, so I gave it five stars anyway for great performance, power and price.
The T amp sounded amazing while it lasted its short 5 minute life. I paired it with a PSW111 and Tsi100, and the sound quality was incredible. I could tell exactly where the instruments were coming from and the mids were very warm and highs bright. But shortly afterwards the amp smelled like it was burning and my right speaker popped...so I guess I have a T amp with no right channel functionality and a potentially messed up right speaker. :(
I have been looking for some time for a small portable amplifier to power two small speakers that I installed on my power wheelchair. I came across this amplifier after searching everywhere for an amplifier that could power regular speakers using a small mp3 player. When this item arrived, my first impression was that maybe I wasted my money. The amplifier is much smaller than it appears in the pictures.
over your wifi network. Excellent, excellent technology. The sound quality is even very good!Back to the amp's performance:  This little amp output sound that was warm with clear crisp highs and tight bass. It isn't going to go up against high end audio equipment but for the price and size, it is absolutely incredible! You get decent volume, though you can't get rock concert levels out of it. This should go without saying, as it is rated at 15 watts/channel.
I personally use it with a pair of Paradigm Mini Monitor speakers, which are very high quality speakers, and the amp drives them wonderfully and louder than I could possibly want it.The only minor annoyance I have with the amp is that it is difficult to insert the batteries, but it doesn't take a rocket scientist to do so and I use it off AC power most of the time anyway.
I used this amp with the Micca MB42x bookshelf speakers. My intent was to put together a cheap, portable setup that I could use both on my desk at home, and to carry with me in the car/camping on trips. I'm using Velcro to hook the different parts together for travel and portability.This amp provided both battery and wall power. I was debating between this and the lepai 2020a+ and decided that having the built in battery compartment was easier than wiring up my own...
Answer: No you can't. They're already internally bridged, so you can't bridge the channels together. It would fry the amp. Just buy a more powerful amp if 15W isn't enough.