Taking inspiration from its predecessors, the Sennheiser HD 660S is here to break performance barriers with its smooth transient response and engaging sound across the frequency range. The new driver unit and spaciously stunning mesh ensure a dynamic sound with every detail intact. The multiple cables and connector options make this the perfect audiophile go-to.
Unlock the Perfect Tone & Space
The perfect blend of an open-back design with a specially-tuned driver, the Sennheiser HD 660S is designed for the modern audiophile. Its aluminium voice coil and 38mm diaphragm is ultra-quick for a fast transient response across the frequency range. Each driver is matched to its opposite-channel counterpart at our manufacturing facility in Ireland. These tolerances are extremely narrow and when bolstered by automated assembly processes, ensure that your HD 660S experience is consistent with those all over the globe.
Beautiful & Functional
The HD 660S was engineered with a thoughtful acoustical system. It is crafted from light and durable materials for a luxurious feel. The steel mesh on the earcups is intricately designed to look gorgeous while acting as ventilation for the driver, offering consistent control of air displacement to reduce turbulence. The result: Each note is spacious, natural and beautiful.
Versatility that Brings Out the Best in Your Music
No matter the audio source device of your choice, the HD 660S is geared to make it shine. Sennheiser has included multiple 3-metre (9.8-feet) long cables with a variety of connectors. The ¼-inch (6.3mm) stereo plug is the standard connection for audiophile devices like headphone amplifiers, A/V receivers, DAPs, computer-based workstations, etc. A 4.4mm connector is perfect for audio devices with a balanced output. Need something for on-the-go sound? The 6.3mm to 3.5mm adapter is here to the rescue.
Trusted By Over 12K+ Music Enthusiast
Very Useful Product for USB C easily connect headphone for the music listener.
I write this review after almost 6 months of purchase. During this period I bought several other IEMs and was listening to a variety of sounds. The Moondrop Kato is a unique iem in its own way. Perfect balanced sound for all genres of music. All frequencies shine on this iem. My only problem is with the fit. It's a bit heavy, being solid CNC machined metal. I haven't tried the more evolved tips to resolve the fit issue. The sub bass and mid bass are quite surprisingly more prominent than some of the planar IEMs I listened to. The vocals and high frequencies were so much clear and bright with no distortion or sibilance even at higher volumes. The Kato is easy to drive and expose nuances in music that remain subdued on other IEMs. Its a whole new experience listening to hi definition music on Kato. Slowly building on you as it gradually burns in. The Kato is a must for aspiring audiophiles. It also is a reference monitor for comparisons with other Hybrid, Planar and BA iems. I am sure, you won't be disappointed with its performance.
Great Purchase, totally recommended.
Price to performance ratio is awesome.
These are pretty great modular cables, which has a good price to performance ratio. Build quality relatively sturdy.
Wow..these are still V Shape tuning king...edm or rock...electronic music is excellent in this. The recent zeros are too hot in treble for me.
Excellent bullet earphones...if you give it some power....this will blow your mind for sure...not good for phone output..you need a very good dongle like tempotec hd pro or ibasso dc03 pro...excellent pairing.
First time ordering from this store, ordered on the 18th morning and got it on 19th afternoon (Chennai). At first I was disappointed but as I listen I can hear more details, I don't know if it's a good thing as some of the songs I listen to have some anoying background noises and the vocals seems enjoyable. Fit is comfortable and easy to put on. Overall I think it's worth the money.
Gives required boost from Mobile audio out to My IEM and DT 770 pro 250 OHMS Headset
Great power output and sounds sweet. Few a very minor cons, but overcome by the pros. Its a good buy overall.
Other options for portable players available now with almost double the price is shanling m0 pro or hiby R2
The DAC was purchased with lot of apprehensions on the sound quality. But it came out a winner. Beautiful sound, punch bass, solid mids and very airy and clear highs. A superb combo for your iPhone to listen to hi-res music!
An iem I like a lot, it delivers good bass and fairly good mid and treble too, i use it with a lotion paw s1 and spinfit 100 eartips.Worth every penny. Excellent value.
These IEMs live up to the name. The music sounds lively and precisely the way you want to hear it—a very close or almost Harman-curved sound signature. The only con is the plastic feeling of the shell and the cable and sticks a little out of the ear. Although, the most powerful in my collections to likes of Ikko Oh01, BQEYZ Summer, TruthEar Zero, and KZ EDX pro.
These IEMs kind of felt dull in the beginning but boy, they do not fail to amaze at all. Such a balanced sound signature, although not a wide soundstage but very enjoyable. These are available for 129$ on Linsoul and it is blessing we're getting it only for 49$ here in India.
- Opens in a new window.