peachtree amp vs. traditional amp


OK, I'm a newbie, so this is possibly a dumb question.  I am considering a 2 channel amp to listen to music (Tidal or spotify).  I am looking at a traditional looking black box amp by Yamaha or Marantz.  But I've also seen a very small amp by peachtree.  The peachtree seems to be about the same of watts as the others.  How would the sound compare?  It seems that the peachtree is so small, it would not have the same power.  Doesn't size/weight translate to some level of power?  Anyways, has anyone compared a peachtree to a traditional amp of the same power rating?  Please share thoughts.
dougmint
My two cents:
If you're looking for a traditional black face amplifier like Sansui, NAD, Etc. you're on the right track for good sounding music however, I can tell you that with today's medium of choice which is digital music, streaming from an I-pad or other internet based source (Tidal is an excellent choice) that older analog components lack a critical component for processing digital music-a DAC (digital/analog converter).
I recently went from a very good standard stereo system BK Sonata with Outlaw pre-amp and outboard DAC to a Peachtree Nova 300. With a tear in my eye I unplugged what was a decades long quest for perfect sound and put it in the garage, The Peachtree does it all and sounds absolutely stunning PLUS it has USB and WiFi so you can easily stream the best sound possible from a digital source thanks to a stellar onboard DAC.
All in one beautiful component. The best investment I've ever made-period 
I own a Peachtree Nova 300 and it sounds great. I think it’s a much nicer looking piece than the typical "black box" gear. In addition to being very musical, it has a great DAC and headphone amp and the fact that it takes up less space was one of the deciding factors for me. Mine went into my computer room where I didn’t have space for the typical larger units.
I also have a Nova 300, and it is a great amp (especially when you consider the cost factor).  It doesn't sound sterile, it can really crank if you need it to, and has lots of bells and whistles if you need an integrated solution.  This said, I have moved it to my bedroom as I wanted to work on more of a tube sound in my listening room. Before I moved it to the bedroom, I had it fed via the USB-B with a Mac Mini that I had all my music in FLAC's on Audirvana Plus using volume bypass, and HTB as I was sharing my mains with the HT and my 2-channel listening.  My goal was to break the system into 2 separate systems that are co-located as I have added speakers and a DAC and preamp thus far.  Still deciding on the tube amp, so I haven't completed the new setup yet. 

For the money, the Nova amps are a pretty good deal IMO.  I realize I'm a bit fickle and make changes too quickly, but I won't get rid of the Nova as it'll work well in either my bedroom or garage setups.  It's worth keeping I'd say.