Tweak Audio EVS 1200 is based on ICEPower 1200AS1/2 Class-D modules. I had these modules running a pair of Watt/Puppy speakers and they just couldn’t handle the impedance for these Wilson speakers properly. The amps never failed, but the results were a flat sterile sound.
The ICEPower 1200AS1/2 are rated at minimum load of 2.7 ohms, so based on the comments about the Watt/Puppy 7 speakers from Stereophile, anyone with these types of speakers probably won’t be happy with the results either, especially in the bass region.
Its impedance drops to 2.4 ohms at 78Hz and remains below 6 ohms for much of the region where music has its maximum energy (fig.1). In addition, an impedance of 4 ohms at 59Hz is associated with an electrical phase angle of -34 degrees, which will add to the drive difficulty. With both its enclosures ported, interpreting the impedance curve at low frequencies is difficult, but it appears that the Puppy’s 3"-diameter port is tuned to 27Hz or so, while the WATT’s 1" port is tuned to about 80Hz.
Read more at https://www.stereophile.com/content/wilson-audio-specialties-wattpuppy-7-loudspeaker-measurements#9A...
Even for an 11yr. old thread, Tweak1 really should be doing some type of research before making recommendations on amps for speakers he’s never heard.