D10s (muses 02 op amp tweaked d10s sound) > nobsound ns-08e (gets the job done for adding tube flavors, replaced 5532s with opa 1622s helped tube flavor stand out more) > l30ii for power and linear grunt.
Best amp/dac combo I’ve found for my modded 4xx detailed cannons!
The first mod is the angle pads I got they are 50mm by 40mm sheepskin pads by AHG. I also ordered the anodized aluminum custom grill off of ebay for a little more sound stage than the og grill plus they look cool. To tops things off I got the voarmaks aviator head padding on amazon for 15 bucks really the best comfort I’ve had for a planar as well with sound.
4xx personally for me so far modded with ahg 40-50mm pads and grills off of ebay for a little more soundstage, could remove the film off of stock as well but the anodized ones just look too cool. I usually prefer to listen to trance/electro/techno/synth, and other edm genres with pop every now and than.