Acoustune HS1650 CU vs Acoustune HS1551 CU
The HS1551 CU has slightly more sub-bass quantity than the HS1650 CU. Rumble on both is expressed naturally. The HS1650 CU has greater extension than the HS1551 CU. The sub-bass reproduction is more engaging on the HS1650 CU with greater bass definition. The bass texture is rendered smoothly on both while the bass decay on the HS1650 CU has greater speed. The extra agility elevates the overall engagement level. The mid-bass on the HS1551 CU has more body and the slam is delivered in a fuller manner. Each bass note on the HS1650 CU is articulated with a stronger hit and there is greater impact. The midrange on the HS1650 CU is more detailed and boasts higher transparency level. The HS1551 CU is warmer in this aspect. The lower mids on the HS1551 CU has more quantity and male vocals are tackled better. The upper mids on the HS1650 CU has additional forwardness and it presents female vocals with higher intimacy level. Next, in the treble section, the HS1650 CU extends with greater magnitude and the presentation is brighter than the HS1551 CU. The crisp is more defined on the HS1650 CU and it comes with extra sparkle which injects excitement into the sound. Lastly, for the soundstage, both expands in a natural manner. The width magnitude is greater on the HS1650 CU and the depth on HS1551 CU is more closed in.
Acoustune HS1650 CU vs HiFiMAN RE800
The HS1650 CU has more sub-bass quantity than the RE800 and it commands greater extension. The sub-bass reproduction on the HS1650 CU has a higher engagement level and it is tighter. The bass texture on the RE800 is rendered in a slightly smoother manner and the bass decay on the HS1650 CU is quicker. The mid-bass on the RE800 has more body and the delivery of the slam is not as quick as the HS1650 CU. Each bass note on the HS1650 CU is expressed with a more authoritative hit. The midrange on the HS1650 CU packs more details than the RE800 with extra energy. The lower mids on the HS1650 CU has more body than the RE800 and male vocals sound fuller. The upper mids on the HS1650 CU has additional forwardness and it accentuates female vocals to be more intimate. The treble on the HS1650 CU has better extension and it has a higher level of details retrieval. Treble articulation is more precise on the HS1650 CU. The crisp on the HS1650 CU is more defined and it comes with more sparkle at the top end. The amount of air rendered on the HS1650 CU is greater. Lastly, in terms of soundstage, there is a natural expansion for both. The width magnitude for the HS1650 CU is greater and there is better depth on the HS1650 CU.