Sennheiser Momentum – which can be bought as an over-ear headphones, on-ear headphone or in-ear headphone (can also be found in their Bluetooth variants) The Sennheiser CX 300-II have bright highs and are able to resolve some mild detail. Piercing highs are not present but sibilance could be recurrently and strongly heard. The Sennheiser CX 300-II bass is punchy and deep with a fun style that provides energy, strong mid-bass and good sub-bass to any type of genre. Mid-bass could feel a bit too strong if you were expecting a more classic/balanced sound style from Sennheiser but if you enjoy vigorous bass these in-ear headphones will most probably make you happy.

So Sennheiser faced a difficult task when it came to updating the CX300s. The price had to be low enough to tempt people away from the freebies, and sound quality had to be good enough to improve on the first-generation model, but not so good that they cannibalised the higher-end earphones that Sennheiser sells at higher prices. They seem to have got the balancing act just about right. Applying an EQ, lower vocals clear up and mid-bass bleed is reduced but if the overall EQ is overdone their vocals can risk to get a bit ecoish (if done correctly there will not be any issues). Higher mids can get a bit harshy if pushed too much. The tiny footprint of the Sennheiser CX 300-II housings makes them fit inside any kind of ear’s size without becoming obtrusive nor uncomfortable but neither are too loose as to fall off the ears while being used on everyday activities. Moreover, by being so small and fitting deep they sit flat with the ears allowing them to be a very well featured in-ear headphone to be used under helmets or at bed. Due, to the aforementioned they are now part of our Best Earphones for Helmets Chart.These are not the best headphones you can buy, but they are incredibly good value. With plenty of volume and a big, meaty sound, it looks like Sennheiser has another hit on its hands. The housings of the Sennheiser CX 300-II are mainly built in plastic but also have a silver metallic ring. Their weight and size is minuscule, being the eartip as big as the housing itself. Sennheiser has not specified the size of the dynamic driver inside the housings but despite having tiny housings, a fairly large driver could be fitted inside, in the past we have reviewed other earphones that have similarly small sized housings like the JBL T110, Sony MDR-EX15LP, JBL C100SI, FISCHER AUDIO Dream Catcher and most had at least 8mm DD inside, besides the FISCHER AUDIO that holds the smallest DD in the world (3.8mm) Despite the very small size of the Sennheiser CX 300-II, they are able to offer a remarkable amount of sound isolation with a clearly subdued perception of your surroundings without having to apply a health-risking (for your ears) high volume.

An EQ makes their highs very noticeably brighter, some extra detail is also resolved but not by a huge amount. Piercing highs still remain under control but sibiliance becomes stronger. A different approach can be taken regarding their high’s equalization, if you prefer you can aim your EQ to reduce sibilance instead of enhancing brightness and the Sennheiser CX 300-II will respond greatly with a very clear reduction of their sibilant vocals without taking out too much of their high’s brightness; if you want the ” EQ recipe”, just dial down frequencies near the 7 kHz and fine tune the nearby ones. The Sennheiser CX 300-II features asymmetrical cables (a cable style that you might have seen in our review of the Sony MH1 Livesound) to reduce cable cluttering and have a rubberized finish to reduce tangling issues. The Sennheiser CX 300-II are a very popular budget model from Sennheiser that has an incredibly small size and that Sennheiser markets as an earbud with “powerful”“big bass response”; we will determine this after running our Sennheiser CX 300-II soundtests.When running the Sennheiser CX 300-II through our extreme basshead tests, they handled up to 47% of the maximum power coming from a Fiio E12 Mont Blanc amplifier while turning it’s bass boost on, high gain and applying a custom basshead EQ. The results were an outstanding increment of their mid-bass punch and sub-bass depth and reaching a very worthy basshead rumble and impact above the KZ ATE , Xiaomi Mi Pro HD , Panasonic RP-TCM 125 but still below the Sony MDR-XB50 , Sony MDR-EX650 , Pioneer SE-CX8 , KZ ZST , Xiaomi Mi In-Ear Headphones Pro or the Sony MDR-7550 / Sony MDR-EX800st . Sennheiser is an ultra famous headphone and earphones company that you most probably already know and might have heard from. The sound that leaks out of the Sennheiser CX 300-II is more or less inline with many average earphones, this means that their sound will be heard by nearby people if you crank the volume a bit past a moderate level but will not be too disturbing under normal city situations.