• The high cost and timeline to upgrade to 440 CORE was a factor
  
• The Gryphon with DAC and phono module is an excellent "all in one" solution for my set up.
  
• I had the opportunity to purchase a nearly new but used 300...could not resist.
  

• The bass response from the D400 is deeper using SAM and more prominent in almost all play.
  
• The bass response from the 300 is clearer, tighter and better integrated into the music.
  
• The 300 is more musical; the D400 more detailed but the 300 is extraordinarily detailed too, not lacking detail
  
• Both have unrestrained power and control but the 300 seems to have more of both. My listening levels are not high enough to really test either.
  
• I find the 300 more engaging and hard to ignore when it's playing. This is true for the D400 too but not to the same extent...back to "more musical".
  
• The 300 is significantly better at low volume.
  
• The hybrid class a/d design of the D400 is brilliant in almost eliminating the downside of class d amplification but the more traditional design of the 300 avoids it all together.
  
• The phono module in the 300 is noticeably superior, with analogue all the way, avoiding the DAC while the d400 does converts twice. Not sure if that's why the 300 is better but it is.
  
• The 300 DAC is not compatible with MQA streaming at 192 however its streamed s/q is superior generally. The 300 DAC just sounds better...eliminating any impression of digital. 
  

(06-Nov-2021, 01:05)Delija Wrote: What speakers are you using?

That's very important when choosing the amp.

(08-Nov-2021, 23:04)renan Wrote: Did you have the opportunity to compare the Diablo 300 with a D440?