How to Sing Like I.M (Monsta X): Vocal Range, Deep Rap-Singing & the Technique Behind It

Singing like I.M comes down to two trainable skills: sustaining a relaxed, breath-supported tone in the low register without pressing or straining, and shaping tone deliberately from phrase to phrase — a songwriting-informed habit of matching vocal color to emotional intent rather than singing every line the same way. Neither requires a naturally deep voice on day one; both are coordination and breath skills that build with focused, voice-safe practice.

Safety note: None of the techniques in this guide should cause throat tightness, a pressed or squeezed sensation at the larynx, or hoarseness lasting beyond 24 hours. A genuinely low, resonant tone is produced through relaxed cord closure and steady breath support — not by tensing the throat to force pitch downward. If a low note starts to feel strained, ease off in volume and rest. Hoarseness that persists more than two weeks warrants a consultation with an ENT specialist.

I.M's Vocal Profile

I.M does not have an officially documented vocal range — no classical fach classification or verified measurement exists for his voice. What is consistently noted across fan vocal analyses and listening breakdowns is that his tone sits in a naturally deep, low register that stands out within MONSTA X's overall vocal blend, giving the group's ensemble sound a distinct low-end texture.

A note on accuracy: because no official range figure exists, any specific number circulating online should be treated as an informal estimate rather than a verified fact. What's more useful — and more consistently observable across his catalog — is how he uses that low register technically, which is the focus of this guide.

His vocal identity has two defining characteristics:

• Deep, low-register rap-singing — a naturally low tone maintained through rap-influenced rhythmic delivery and melodic singing alike, giving both modes a consistent low-end color.
• Songwriting-driven tone control — as a writer on his own material, he shifts between a languorous, pulled-back delivery and a more direct, driven tone within the same song, matching vocal color to the emotional beat of each line.

The combination of a naturally low register and deliberate, writer-informed tone shaping is what gives his sections a distinct identity inside MONSTA X's arrangements.

I.M's Signature Songs — by Vocal Challenge

These are the tracks most consistently cited for I.M's low-register rap-singing. Transpose any of them to a key that fits your own voice — the goal is the coordination, not the exact pitch.

Start with "U R" for the pure low-register rap feel, then move to "Beautiful Liar" once sustained low tone feels stable — "Who Do U Love?" combines both skills and is a natural endpoint rather than a starting point.

The 3 Techniques Behind I.M's Sound

Deep Low-Register Rap-Singing (Relaxed Cord Closure)

The foundation of I.M's sound is a low tone that stays relaxed rather than pushed. This comes from relaxed vocal fold closure paired with a naturally settled, low laryngeal position — the opposite of forcing pitch down by tightening the throat. The common mistake when singers try to sound "deeper" is pressing the larynx down manually, which produces a strained, muffled quality instead of a genuinely resonant low tone. In Bloom Vocal, C-8 (SLS Vowel Scale) trains the relaxed, speech-level larynx position that underlies a free low register, and E-2 (Chest Resonance Activation) builds the resonant fullness that keeps a low tone from sounding thin. For the underlying registration mechanics, the mix voice practice guide covers how chest, mix, and head registers interact.

Songwriting-Driven Tone Control (Phrase-Level Dynamic Shaping)

Because I.M is involved in writing his own material, his delivery shifts tone color from line to line to match the emotional weight of the lyric — pulling back into a languorous, intimate color in one phrase and pushing into a more direct, driven tone in the next. This is deliberate dynamic and vowel shaping, not a fixed vocal setting. Singers who skip this step tend to deliver every line at the same volume and color, which flattens the emotional arc of the verse. In Bloom Vocal, F-1 (Messa di Voce / Dynamic Swell) and F-2 (Dynamic Contour Circle) train the volume and intensity control that phrase-level tone shifts depend on. The K-pop idol vocal style analysis breaks down how different idols use dynamic shaping as a stylistic signature.

Low-Register Consistency as a Textural Role

Within a group vocal blend, sustaining a consistently low, resonant tone across an entire verse or track — rather than letting it thin out or drift upward under fatigue — requires deliberate breath management. This consistency is what lets a low register function as a distinct textural layer against brighter voices in the same arrangement, rather than disappearing into the mix. In Bloom Vocal, A-9 (Costal Breathing) and A-10 (Appoggio Technique) build the breath stamina needed to hold a low, supported tone for full phrases without the drop-off that happens when breath support runs out mid-line.

How to Train Toward I.M's Style

Step 1 — Find your natural low register and a comfortable key

Run a range test from your lowest to highest comfortable note, and identify where your voice sits relaxed in its lowest third — not the absolute bottom where tone thins or cracks. Transpose any song into that zone. I.M's low-register effect is achievable at different absolute pitches once the relaxed coordination behind it is in place; chasing an exact low pitch before that coordination exists just produces strain.

Step 2 — Study one low-register phrase for texture, not just pitch

Pick a short passage from a song like "U R" and listen closely: is the delivery closer to rhythmic rap speech, or sustained melodic tone, or a blend of both? Note where the tone feels pulled-back and intimate versus where it pushes forward with more intensity. Naming the mode and intent of each phrase before you sing it turns imitation into a technical exercise rather than guesswork.

Step 3 — Build breath support for sustained low-pitch tone

Low notes are more prone to losing support over the length of a phrase than mid-range notes — the tone can go breathy or fade before the line ends if breath management is weak. Work A-1 (Diaphragmatic Breathing) and A-9 (Costal Breathing) in Bloom Vocal to build the airflow consistency needed to hold a low, resonant tone across a full phrase without it thinning near the end.

Step 4 — Train tone control through phrase-level intent, not just pitch

Before singing each line, decide on its intent — pulled-back and languorous, or direct and driven — and shape your breath pressure and vowel space accordingly. Practice F-1 (Messa di Voce) to build the volume control this requires, then apply it phrase by phrase in a song like "Beautiful Liar," where the shift between intimate and open delivery is clear. This is the habit that separates flat, single-color imitation from I.M's writer-informed phrasing.

Step 5 — Run an AI feedback loop on a single passage

Choose one 8-bar low-register phrase — a verse from "U R" or "Who Do U Love?" works well — record it, and use Bloom Vocal's AI coaching to score your pitch accuracy, breath support, and tone consistency. The AI surfaces habits like breath dropping off before a phrase ends or tone thinning under sustained low pitch, which are difficult to catch by self-listening alone.

Check Your Cover with AI

Ear-based imitation has a ceiling: it's genuinely hard to hear your own breath support fading or your low tone thinning while you're mid-performance. Record a passage from I.M's catalog — a low-register verse from "U R" or a sustained line from "Beautiful Liar" — and Bloom Vocal's AI scores your pitch accuracy, breath support, register consistency, rhythm, and expression on a 1–5 rubric, then recommends the specific exercises to address your weakest area first. It turns "that felt a little thin" into "your breath support dropped in the second half of the phrase — drill A-9 and E-2."

For a broader framework on how K-pop vocal styles map to trainable techniques, see the K-pop idol vocal style analysis. To compare a different MONSTA X vocal approach, the Shownu guide, Kihyun guide, and Wonho guide walk through registration and resonance work from three different starting points within the same group.

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References

• Titze, I. R., & Verdolini Abbott, K. (2012). Vocology: The Science and Practice of Voice Habilitation. National Center for Voice and Speech. [Vocal fold closure mechanics, laryngeal positioning, and breath support requirements for sustained low-pitch phonation without strain.]
• Sadolin, C. (2000). Complete Vocal Technique. Shout Publishing. [Resonance and registration principles across chest-dominant low-register singing, including the relationship between relaxed laryngeal position and tonal fullness.]