Is there a way to equalize the sound from the dragonflys?
re-sampling sound software processors can ruin a lot with the way dragonfly can sound, so it depends on what OS/software/hardware platform you're using.
if using EQ on mobile devices, you're at the mercy of the software, juice and cabling to the hardware.
on Windows OS platforms, setup audio routing to "direct sound" and make sure ground paths and USB cleansing is present.
if using hardware mixer, recommend jitterbug, it will keep everything clean from your dragonfly all the way through mixer/FX samples to your speakers as much as possible, but only if using high quality cabling.
as far as software mixers, very few software developers get it thoroughly sounding right and tight on software timing. so don't be sold on dragonfly right away if you've only tested one program's EQ output.
as far as hardware mixers for example, not a big fan of entry-level Yamaha mixers, it re-samples like it thinks customers are using low quality speakers, meaning I can hear the audio degrade significantly as if Yamaha thinks they want to synthesize everything back to the 90's tv-style speakers.
EQ always works best on 320K/FLAC/WAV,etc sound files. highs/mids/lows, FX processors, will be more adjustable and tune-able on higher quality sound files.
there are no real rules; if it sounds good, it sounds good, if not, try something else and keep searching. i was never able to get my highs at 60% smooth and perfect mids at 45% until dragonly_RED matched with the jitterbug.
one listening issue with some hardware EQ's is the GAIN may be set prematurely with the volume settings, and sometimes it's absolutely hit or miss depending on what can actually be tuned with the immediate speaker controls and its tune-settings, and especially a problem for headphones that have built-in processors where the audio enhancement is "always enabled" and thus making the dragonfly_RED utterly useless with some EQ controls, as to deviate potentially preferable & desired change in audio performance and quality.