Video Summary - in-Ear Fetish Review \\ Tanchjim 4u IEM

Product reviewed

Tanchjim 4U in-ear monitors (IEMs)

Physical bass adjustment dial (instead of “switches”)
- Uses a small screwdriver slot on the IEM to rotate a control.
- 4 bass levels total, labeled via orientation lines/arrow.
- Reviewer note: the arrow initially pointed to the highest bass on unboxing, then they tested all settings.
Includes “render tips”
- Said to enhance low-end, but not create bass from nothing.
Compact design + cable details
- Very small IEM size (reviewer repeatedly removed/reinserted for adjustment during listening).
- Cable described as two-wire, with long pins and a deep socket (not compatible with a typical flat plug; requires the correct form).
- Cable feels “nice” and connects via a small 3.5mm plug.
Dynamic driver / tuning hardware explanation (speculative but stated)
- Reviewer describes it as a single dynamic driver system.
- Suggests the bass mechanism works by physically opening an aperture/port to increase bass, rather than relying on a typical switch gimmick.

Level 1 (lowest): moderate bass — not “bassy mood” for the day.
Level 2 (second notch): described as “perfect” / best fit for them.
Level 3: “another one above this,” fitting a bass-head profile; reviewer says it’s about as far as they would go.
Level 4 (highest): described as very extreme, potentially approaching distortion/driver limitation — “not unusable,” but for listeners who want maximum low-end.

Reviewer claims it does not ruin non-bass tracks.
Bass-light tracks stay bass-light, with only slight extra warmth.
Modes are portrayed as controllable bass presence, not a blanket EQ boost on everything.

IEMs are described as slightly biased toward treble brightness.
Soundstage is a standout:
- Vocals are centrally placed.
- Demo tracks include “haunting”/surround-like effects.
Treble is described as present and bright, but not overly harsh.

Bass dial is not a gimmick (reviewer repeatedly emphasizes this).
Adjustability across a wide bass range
- From slightly light → “perfect” → boosted/robust.
Very strong sound quality even at a low-ish price (relative to expectations).
Comfort and fit: described as “too comfortable.”
Good build details
- Attractive mirrored back, solid small screwdriver included, nice cable feel.
Cable quality / aesthetics praised.

No color options (reviewer says “no other colors”).
Adjustment requires removing both IEMs repeatedly
- Reviewer reports removing them about ~13 times to set both sides comfortably during evaluation.
Top bass level may become excessive
- Level 4 described as potentially nearing distortion / “driver runs out of go.”

Reviewer initially guessed MSRP might be around $225, then revised after checking.
Mentioned cost/positioning:
- About $220 (with some uncertainty), then corrected again to a final effective price of $69–$70.
Value argument:
- Sound is good enough that it feels competitive with much more expensive sets.
- Reviewer mentions it sounds better than something over $150.
Overall framing:
- They don’t want to “compare with the big boys,” but still call it a 10/10 value pick at roughly $70.

Overall: 10 out of 10
- Reviewer: “I’m about to give these a 10… 10 out of 10… an IEM that’s a 10.”

Strong recommendation: Best for listeners who want a controllable bass level, plus good sound staging and comfort, and who don’t mind a slightly bright/treble-present character.
Recommended bass setting (for them): Level 2
Use caution with Level 4 if you want clean bass without risking distortion/excess.

Emphasis on the physical bass dial mechanism vs switch-based IEMs.
Notes on bass levels 1–4 and behavior with bass-heavy vs bass-light songs.
Praise for soundstage, vocal placement, treble brightness, and comfort.
Value/price discussion culminating in a 10/10 recommendation at ~$70.
Build/cable/screwdriver accessory details and adjustment/fit quirks.