Kinboofi TRI Starsea in Ear Monitor 2BA 1DD HiFi Earphone with Adjust Tuning Switch Earbuds Headphone Headset (Champagne No Mic)

Balance would be the best word to describe these. It does not have a bloated bass nor does it have spiky treble，overall a smooth and lush presentation with a natural tonality. No fatigue and easy to listen to. Plus，the build and look is way beyond its price range. If you think tin t2 and t3 have too much treble and sibilance，you are going to love the tri i4.

Pros - *Powerful, punchy bass*Smooth, non fatiguing sound*Excellent build quality*Very comfortableCons - *Bass might be too restrained for hard core bass headsI had previously never heard of TRI and was excited to try them out.The TRI I4 is a new hybrid 2-way iem featuring a 10mm biocellulose dynamic driver to handle the low frequencies and a single Knowles balanced armature for mid and high frequencies. The shells are CNC machined out of aluminum alloy and they look and feel high quality with a reassuring weight and excellent comfort. The cable is very nice for a stock cable and attaches via mmcx connectors. There is a good selection of included tips, but I changed them out with red and blue tips solely because it makes it easier to tell right from left in low light. I always do this so, this had nothing to do with tip performance. Also inside the box, was a very soft velvet pouch. Nice!My testing was done using FLAC's at 16bit/44.1k or higher played on my Hiby R3. The I4's sounded good on my Samsung Galaxy Note 9 but did scale a bit with more powerful sources.BassBass response is definitely elevated leaning more heavily on sub bass but still elevated to a lesser extent at the upper bass. Low end extension is very good and offers up a tight subwoofer sounding kick drum that is nice and fast and well defined. Upper bass is less accentuated but has good slam and polite, non bloated response. I especially enjoy its speed and definition. Bass overall, is tastefully presented and doesn't bleed into the lower mids. The bass is powerful and capable of producing a nice fat electronic bass for hip hop or edm but it is probably a bit too polite for true bass heads. The rest of us will approve.MidsMids are slightly recessed but not enough to make vocals sound weak. There is excellent detail without sounding too aggressive or edgy. Female vocals sound great with nice air and no hint of upper mid sibilance. Male vocals are a tiny bit lean but I really like them. If more low mids are desired, they respond well to eq though I was happy as is. Electric guitars have good detail and nice girth. Some may wish for a bit more grit from them when listening to metal but, again, I enjoyed them as is. A boost around 3k on your eq will give you more edge if desired.TrebleUpper mids and treble are smooth and non offensive. No sibilance anywhere. These are a departure from other iems in its price range likely owing to the use of a Knowles driver. There is plenty of air and sparkle but they are not overly aggressive and have no ugly peaks or valleys. Cymbals are rendered with a delicacy and control that is addictive. There is zero grain or glare.Sound SignatureI would call the sound signature a mild V shape but not to the point that mids are buried. My biggest take away is of a very even and controlled sound with excellent timbre. They just sound very natural and wholesome.Sound StageThe soundstage is of slightly above average width and with decent depth. Individual instruments are easy to pick out and place on the stage. Boosting the treble a bit can make the width appear bigger but can overshadow the mids if boosting too much.Music GenresI enjoy the I4 with pretty much any genre but it excels at music with less density where the detailed mids shine giving a good sense of space and reverb tails sound sublime. Acoustic instruments such as guitar, violin, cello and even banjo sound stellar. You can hear the woodiness and texture of the instruments very well. Nice! Classic rock, jazz, and country will all be well reproduced. I enjoy electronic music with these, but they will not supply the long, loose, bass boom and treble hype that some expect. This is a good trade off in my opinion as they never get strident or fatiguing. I enjoy listening to "Slash with Myles Kennedy and the Co-Conspiritors", but often find the vocals to be quite sibilent and even the kick drums have a sharp pointy sound. The I4 smoothes out the peaks and makes the mix sound ideal with powerful, fast kick drums, thick chunky guitars and a reasonably wide soundstage. The lack of sibilance makes these my go-to pair.ComparisonI have been listening to my KZ ZSX a lot lately and they are the perfect counter point to the I4. The KZ is slightly more efficient but, the I4 is easily driven from modest sources. Both sets have powerful bass but the ZSX has more grunt and slightly slower decay. Mids are slightly more recessed on the ZSX but have more aggressive detail and more grit. Treble in the ZSX is much more aggressive, but stops just short of too much. There is more air and naturally a wider stage that works well on genres that need more hype and excitement. The I4 is no slouch here but, it is less aggressive.If you listen to edm, metal or hip hop often, you might prefer the KZ but it's not a deal breaker. They make a great 1-2 punch in my opinion.ConclusionIf you have read this far, it's clear that I like the I4 very much. I have no reservations recommending them to anyone and they will continue to get a lot of playtime in my daily rotation going forward. I can't wait to try other products from TRI as they become available.I obtained these from Kinboofi's China store and really like them so I thought I would review them here.Thanks for reading!