The recommended power supply should be capable of providing 12V DC and 2A. I use a modified 110 watt Switch Mode Power Supply (SMPS) that has a regulated 12-13V DC and 3-4A output. The amp can actually be driven with anything from 12 to 16V DC. If you can find a laptop power supply or an LED monitor power supply that fits this range, that should be good for starters. These are usually SMPS and should work well.
If you are a DIY audio person -- especially with working safely with power supplies -- I would recommend the Mean Well RS-100-12 SMPS. You will need to put this in an enclosure and also add the following:
Power switch
IEC inlet
DC power cable
With the right power supply, this amp will provide more bass and musical body than the Dayton DTA-1 amp. From what I know, the Dayton DTA-1 is basically the same as the original Sonic Impact T-amp using the Tripath TA2024 Class D chip. I have a Sonic Impact Gen 2 T-amp, which I have modified, and it still doesn't sound as good as the TDA7297 amp in stock form.
I have since replaced the stock Polyester input coupling caps with Panasonic Propylene film and foil caps, and the sound quality has reached a new level. I have some Mundorf Supreme film caps and an SMD resistor-based stepped attenuator on the way. I have high expectations for taking this amp even further.
I've even connected this little amp to my Audio Research PH5 phono stage, and I've obtained great results. This is a very musical amp, and it's so inexpensive. It doesn't beat my Audio Research LS7 and restored and modified Dynakit Stereo 35, but it's able to hold its own.
Thanks! I am looking forward to trying it out in few weeks when it arrives. Do you think the power supply that came with the Dayton DTA-1 would work? I probably have a laptop power supply laying around somewhere.