Headphones

Based on the graph I see the IE900 scooped the upper mid. Crinacle said that other than IE 200 and IE 600 they're not good.

I have the IE900 - there’s no way the bass should come off as weak. I’d say a fit or defect issue.

I just got a pair last week and found that proper seal is the key to accurate sound. I know this sounds obvious but some IEMs are a little more forgiving on the seal. I have different sized ear holes and my right ear needs a larger sized tip. I’m still messing with different brands of tips but I need to wait for delivery of more tips to get the right size but the stock tips are working for now.

Most reviews are barely anything. Very few people on this entire planet truly review to a level that's actually useful.

I can't say much about the Sennheisers. I haven't used one since the IE8. I've never really been compelled to buy anything newer.

The SE846 is one of my favorite IEMs, and it's technically brilliant. Age means nothing. Most of my favorite IEMs are a decade old.

Comfort is hit or miss based on ear shape. They're not perfect for my ears either and rest some on my ear causing discomfort with time. You can play with tips to help adjust relative placement, but there's only so much you can do.

If you want bass geared, take a look at the Sony IER-M9. It's a nice IEM for a more drum and bass sound. I find the mids and highs a little recessed personally, and the quality of the treble doesn't match the SE846. The IER-M9 is impactful and short on note, punchy, clean, but lacks some hefty/body. For example the SE846 has fuller bass notes which make strings sound fuller and more narural. But for drums, the IER-M9 is fun to listen to.

I also have some old UM3X IEMs. They were cool for their time but more for stage use than music and needs a lot of EQing for music. But it is another bass geared IEM that's actually good for drums.

Tell you what, want to give them a listen? I'll mail mine over and see what you think.

I thought the IE300 sounded terrible and I own it lol.

i disliked the most of the ie series with the exception of ie200 and ie600 the rest i cant take it so i think its normal for you. Furthermore you should check the genuine of your iem, might be fake, lot of fake ie900 case these day

IE900 does have less bass than the IE300. IE300 is very big on the bass and warm, with the bass leaking all the way down to 1kHz. It's then very recessed in the upper mids, which would further accentuate the bass.

https://squig.link/?share=Crinacle_Neutral_Target,Sennheiser_IE_300,Sennheiser_IE_900

If you're used to the IE300 as normal, something that's a bit more restrained in the bass like the IE900, might not sound so bassy. But the "quality" could be better.