Lieven posted a review of the newish ER4-XR and SR IEM over on Headfonia. They have a bit of a bass boost from the original ER4-S. Read the review of the for your by clicking the link below. Personally, I’m sticking with my 2003 ER4-S and if I need more bass I’ll EQ it. Interestingly, the original S and P models are going for about the same price as the XR and ST models.
B9Scrambler posted on Head-Fi a review of the updated IEM Havi B3 Pro called the Pro II. The Pro II has a bit more bass than the originals but from the review it sounds like the change didn’t overpower the positives of the original. However, if you are looking for a neutralish treble forward IEM the Pro is likely your choice.
Pros – Punchy low end – Excellent clarity and detail – Immersive soundstage
Cons – At their best when amped
Hisoundfi has a great review of the Meze 99 Neo on Head-Fi. This is the follow on to the original Meze 99 Classic. The primary difference between the two headphones is with the material used to make them. The Classic uses a wood cup versus plastic for the Neo. There are likely some tuning adjustments as well. From the few reviews of the Neo I have read there appears to be a slight tilt to the Classic with folks liking the original a bit over the Neo. Try them out at a meet and see for yourself.
Pros – Classics-like performance at a cheaper asking price, Black and chrome aesthetic looks sharp, Nice cable options and travel case, musical sound signature works with many genres
Cons – Not for those who want neutral and airy sound, Mid-bass can be overwhelming depending on the track that’s playing, Headband microphonics
Ryanjsoo has a review of the latest iteration of the HifFiman RE-600 on Head-Fi. From the review the RE-600s appears to be a worthy successor to the 600 and can be found for less than have the price of the original. Read the extensive review by clicking the link below.
Pros – Linear tuning, Fantastic fit and comfort, Great isolation, Sharp imaging, Clean midrange, Nice bass extension
Cons – Treble not aggressively detailed, Stiff non-removable cable, May be too mellow for some