Sennheiser IE900 VS Unique Melody 2HT Terminator

IEM Comparison: Expert & Community Scores Side-by-Side

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Sennheiser IE900 and Unique Melody 2HT Terminator use 1DD and 1DD+1BA driver setups respectively. Sennheiser IE900 costs $1,500 while Unique Melody 2HT Terminator costs $200. Sennheiser IE900 is $1,300 more expensive. Sennheiser IE900 holds a decisive 1.4-point edge in reviewer scores (7.6 vs 6.2). Sennheiser IE900 has significantly better bass with a 4-point edge, Sennheiser IE900 has better mids with a 0.5-point edge, Sennheiser IE900 has significantly better treble with a 1.5-point edge, Sennheiser IE900 has significantly better soundstage with a 1-point edge and Unique Melody 2HT Terminator has better imaging with a 0.5-point edge.

Insights

Metric Sennheiser IE900 Unique Melody 2HT Terminator
Bass 10 6
Mids 5.5 5
Treble 6 4.5
Details 7 7
Soundstage 7.5 6.5
Imaging 6 6.5
Dynamics 6.5 6.2
Tonality 6.5 5.9
Technicalities 6.6 6.6

Sennheiser IE900 Aggregated Review Score

Average Reviewer Scores

Crin
Jaytiss Precogvision
Audionotions
Super* Review

Average Reviewer Score:

7.6

Strongly Favorable


Unique Melody 2HT Terminator Aggregated Review Score

Average Reviewer Scores

Shuwa-T
Crin

Average Reviewer Score:

6.2

Mixed to Positive


Reviews Comparison

Sennheiser IE900 reviewed by Crin

Crin 6.5 Reviewer Score
B Tuning
A+ Tech
Well-resolving DD IEM with excellent treble control, though with somewhat weak mid-high harmonics.
Youtube Video Summary

Sennheiser’s IE900 delivers a sub-bass–focused tuning with tight control and real tactility, but its trademark upper-mid recession (≈2–5 kHz) keeps vocals and instruments a step back. A pronounced 9–10 kHz lift adds sparkle and air; depending on tolerance, that energy can read either engaging or a touch sharp/sibilant. Technical chops are strong for a single DD—resolution and microdetail are genuinely competitive.

The sticking point is tonal balance and value. While the IE900 is refined and punchy, that blunted midrange character contrasts with its bright treble, creating a love-it-or-leave-it “blue cheese” appeal. Against peers—and especially Sennheiser’s own IE600, which fixes the mids while preserving similar resolution—the IE900’s $1,300 price starts to look tough.

In short: choose the IE900 for its clean sub-bass slam, crisp transients, and airy top if that treble profile hits the spot. If the priority is natural mids and better value without giving up much technical ability, the IE600 feels like the smarter pick—and the real redemption of Sennheiser’s IEM line.


Crin original ranking

Crin Youtube Channel
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Unique Melody 2HT Terminator reviewed by Crin

Crin 6.5 Reviewer Score
B+ Tuning
B+ Tech
Tonality almost reminds me of a HYLA hybrid. Well tuned with strong technical performance.

Crin original ranking

Crin Youtube Channel

Sennheiser IE900 (more reviews)

Sennheiser IE900 reviewed by Super* Review

Super* Review 9* * score normalized

Sennheiser IE900 reviewed by Audionotions

Audionotions 8.5 Reviewer Score
I usually don't like things that aren't all rounders but this might be the exception. Bass is incredible - best in class - great texture, fantastic physicality. Treble response is great too - pretty resolving. There is a noticeable recession in the upper mids, giving these a fairly U/V shaped sound signature - violins, for example, lack a bit of brightness/bite that I would hope for. But unlike other V-shaped IEMs, the mids aren't offensive. Incredibly fun to listen to. Probably the best single DD available. EQ highly recommended. Previously Owned

Audionotions original ranking

Website (Audionotions)

Sennheiser IE900 reviewed by Jaytiss

Jaytiss 7.1 Reviewer Score
B Tuning
C+ Tech
I don't get it, not even a little.

Jaytiss original ranking

Jaytiss Youtube Channel
Mids: B Treble: C+ Dynamics: B Soundstage: A

Sennheiser IE900 reviewed by Precogvision

Precogvision 7 Reviewer Score
A- Tuning
B+ Tech
Excelllent bass - simply excellent. Midrange could use some work, as could the generally average imaging chops.

Precogvision original ranking

Precogvision Youtube Channel
Bass: S+ Mids: C+ Treble: A- Dynamics: A- Details: A- Imaging: B

Unique Melody 2HT Terminator (more reviews)

Unique Melody 2HT Terminator reviewed by Shuwa-T

Shuwa-T 5.9 Reviewer Score
C+ Tuning
B+ Tech
Comment: Bright and treble-focused. Decently tuned and clear Treble bite is real

Shuwa-T original ranking

Shuwa-T Website

Bass: B Mids: C+ Treble: C Soundstage: B+ Details: A- Imaging: B+

Sennheiser IE900 User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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Unique Melody 2HT Terminator User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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Sennheiser IE900 Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

5.5

Gaming Grade

B-

Unique Melody 2HT Terminator Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

6.4

Gaming Grade

B

Sennheiser IE900 Scorings

Average Technical & Tuning Grades

Average Tunign Grade

B+
  • Generally enjoyable tonal character with some noticeable unevenness. Maintains listenability while showing room for refinement in frequency balance.

Average Technical Grade

B+
  • Satisfactory technical performance. Handles basic detail retrieval adequately in most tracks. Maintains reasonable cohesion in simpler arrangements.
Bass S+
World-class bass performance. Perfectly balanced between visceral impact, texture, and depth with zero bleed into mids.
Mids B-
Decent midrange performance - balanced but unremarkable. Adequate clarity for most genres without notable flaws.
Treble B
Good treble response - clear and detailed without fatigue. Well-extended with proper air and sparkle.
Dynamics B+
Good dynamic expression with solid impact. Handles volume contrasts well while maintaining good transient snap.
Soundstage A
Excellent spatial presentation - wide, deep and tall. Precise instrument placement with clear separation in all dimensions.
Details A-
Excellent detail retrieval: highly resolving without being clinical. Effortlessly reveals micro-details and textural subtleties.
Imaging B
Good imaging with precise instrument placement. Clear localization within the soundstage including front/back positioning.
Gaming B-
Moderate spatial presentation conveys general directionality. Suitable for casual play where precision isn't critical. Bad value-to-cost for gaming purpose - not recommended

Unique Melody 2HT Terminator Scorings

Average Technical & Tuning Grades

Average Tunign Grade

B-
  • Generally enjoyable tonal character with some noticeable unevenness. Maintains listenability while showing room for refinement in frequency balance.

Average Technical Grade

B+
  • Satisfactory technical performance. Handles basic detail retrieval adequately in most tracks. Maintains reasonable cohesion in simpler arrangements.
Bass B
Good bass foundation with decent impact. Maintains acceptable control while providing satisfying thump in most tracks.
Mids C+
Decent midrange performance - balanced but unremarkable. Adequate clarity for most genres without notable flaws.
Treble C
Average treble performance - present but lacking refinement. Some graininess or splashiness affects clarity.
Soundstage B+
Good soundstage with proper width and depth. Instruments have clear positioning with reasonable front/back placement.
Details A-
Excellent detail retrieval: highly resolving without being clinical. Effortlessly reveals micro-details and textural subtleties.
Imaging B+
Good imaging with precise instrument placement. Clear localization within the soundstage including front/back positioning.
Gaming B
Decent spatial awareness for fundamental positioning. Creates satisfying atmosphere in story-driven games while handling basic directional cues.

Sennheiser IE900 User Reviews

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Unique Melody 2HT Terminator User Reviews

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