Here’s some impressions of some that I’ve owned or have listened to:
MD x Cavalli Tube Hybrid:
I really enjoy this amp for what it offers and at the price it is at. It has an addicting sound to it that I enjoy.
MD x Noble X:
This was my first, and only, Noble Audio IEM I’ve tried. I was initially impressed with it but over-time I grew to not appreciate it as much as my first impression. It seems overpriced for what it offers/sounds. Seemed a little too bloated in the mid-bass and didn’t offer great detail for it’s asking price. Fit was also a little weird for me.
MD x AKG K7XX:
I bought this one as a gift for my dad for his birthday. He’s a stereophile but was never huge into headphones. He did have a beyerdynamic DT770 before but it broke and I think he tossed it out. Anyway, I always enjoyed AKG for what they were and being super comfortable and lightweight.
MD x AKG M220:
For $50, this isnt that bad of a deal. It’s essentially a K240 with a little more bass and a different colorway. I use this primarily for my Arrius piano. My fiancee has been known to steal it to use for extended listening sessions because her B&O H9 isn’t comfortable for extended use.
MD x Koss PortaPro:
This is a (slightly) overhyped portable on-ear but I found the little improvements of the Massdrop edition to improve comfort and usability. The sound on them is fun and really are good for what they are. I still find the Clip-On version (KSC75/KSC35) to be a better value and more comfortable for use. I actually have the MD x Koss KSC75 on order. I do really like the dark massdrop blue color pattern on these portapros though. I’ve since modded this to make them a bluetooth set.
MD x Sennheiser 6XX:
I only had this for a very short time, but it’s basically a HD650 in a different color and sold at half the price. Incredibly good value.
MD x Hifiman Bolt:
These $10 IEMs are awful. I gave these away to my co-worker, who gave them back to me immediately. I then threw it in on a sale of another headphone I was trying to get rid of to sweeten the pot. It worked. They are extremely bassy, muddy, have no detail, and harsh all in one. The cord is terrible and the driver flex is the worst I’ve ever used.
MD x Focal Elex:
I wrote my review about these and posted it on the Focal Elex thread on this site a couple weeks ago. They are great. Take a $1000 headphone, put better pads on them, change the color, improve the cables and lower the price by $300. I can’t really complain too much. Only thing is the weight is a little hefty for me but I’ve adjusted to it now. Currently wearing them as I type this.
I think that wraps it up for my Massdrop X collaborations for now. I had joined the drop for the ESP95X but dropped out recently.