Introduction
Acoustune is a Japanese audio company founded in 2013 and they specialize in making in-ear monitors. Their iems are of a single dynamic driver configuration. I would like to thank Acoustune for the review unit of the HS1650 CU. More information can be found on Acoustune official website, Acoustune .
Specifications
- Driver Configuration: 10mm Dynamic Driver
- Frequency Response: 10 Hz – 25 kHz
- Sensitivity: 110 dB/mW
- Impedance: 24 ohm
Unboxing & Accessories
The HS1650 CU comes in a black package with a black protective cover that sports the brand name, model name, description and image of the iem at the front. At the back of the protective cover, there are specifications and description of the model. There is metal hard case with the brand logo on top in the black package. After unlocking the case, there are the iem, cable, instruction manual, warranty card, a variety of tips [ AET02 (F), AET06 (S+/M+), AET07 (S/M/L), AET08 (S/M/L) ] and a black carrying case that contains a cable wrap and velcro tie.
Page 2: IEM Build & Design, Cable Build & Design
Audio123 Reviews 
how does this compare to ibasso it04? given that it04 has more drivers than hs1650?
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The HS1650 CU has a stronger bass impact and it is more lively.
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Thank you for the good pictures and a review.
Plz tell me, this thing can playing loud (without killing the driver)? I saw on the box 100mw is the max power. Some eims can handle just 25mw or less and they cant works on very loud level. (witout killing the driver) But for the street i need a loud thing. Now i use an iem with 50mw and its good on maximum level of my mp4 player. Very loud and i cannot hear the traffic. But its technikaly not a big thing.. I need a better one.
THX
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