Heartfield CU8 VS Punch Audio Martilo
IEM Comparison: Expert & Community Scores Side-by-Side
Heartfield CU8 and Punch Audio Martilo use 4BA and 2DD+2BA+1Planar driver setups respectively. Heartfield CU8 costs $279 while Punch Audio Martilo costs $329. Punch Audio Martilo is $50 more expensive. Punch Audio Martilo holds a clear 0.7-point edge in reviewer scores (6.7 vs 7.4). Punch Audio Martilo has significantly better mids with a 2-point edge, Punch Audio Martilo has significantly better treble with a 1-point edge, Punch Audio Martilo has significantly better dynamics with a 2-point edge and Punch Audio Martilo has significantly better soundstage with a 1.5-point edge.
Insights
| Metric | Heartfield CU8 | Punch Audio Martilo |
|---|---|---|
| Bass | 6.7 | 8 |
| Mids | 5 | 7 |
| Treble | 6 | 7 |
| Soundstage | 6 | 7.5 |
| Dynamics | 7 | 9 |
| Gaming capabilities | 6.7 | 7 |
Heartfield CU8 Aggregated Review Score
Heartfield CU8 Average Reviewer Scores
Punch Audio Martilo Aggregated Review Score
Punch Audio Martilo Average Reviewer Scores
Heartfield CU8 Details
Driver Configuration: 4BA
Tuning Type: harman
Price (Msrp): $279
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Punch Audio Martilo Details
Driver Configuration: 2DD+2BA+1Planar
Tuning Type: Bassy with midrange clarity
Price (Msrp): $329
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Heartfield CU8 User Review Score
Heartfield CU8 Average User Scores
Average User Score: n/a
Based on 0 user reviews
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Punch Audio Martilo User Review Score
Punch Audio Martilo Average User Scores
Average User Score: n/a
Based on 0 user reviews
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Heartfield CU8 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.7Gaming Grade
B+Punch Audio Martilo Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7Gaming Grade
A-Heartfield CU8 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.
Punch Audio Martilo Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A- Well-executed tonal character. No major flaws with good technical control. Smooth presentation works with multiple genres.
Average Technical Grade
A-- Competent technical presentation. Handles separation and detail well in most tracks, with modest soundstage and acceptable imaging capabilities.
Heartfield CU8 Reviews
Heartfield CU8 reviewed by: Jays Audio
2025-07-16
6
Reviewer Score
Warmer Harman 2019 with less shouty vocals. Bassy all-rounder with decent tech. Build and plate design is very pretty... but price is a bit high and not that competitive - wait for sale unless you really dig the look. Jays Audio Youtube Channel
Heartfield CU8 reviewed by: Jaytiss
2025-07-10
7
Reviewer Score
It's fine, but is fine worth your purchase? Jaytiss Youtube Channel
Heartfield CU8 reviewed by: IEMRanking AI
2025-08-30
7.1
Reviewer Score
The Heartfield CU8 delivers a neutral sound that closely follows the Harman target curve, providing a balanced and accurate listening experience suitable for both critical monitoring and musical enjoyment. Its bass response is tight and textured, with a slight mid-bass bump that adds a touch of warmth without bleeding into the mids, while the treble remains smooth and free of sibilance.
Build quality is a standout, featuring a hand-finished brass chamber that feels premium but contributes to a heavier design, which might affect fit for some users during extended wear. The included cable is thin relative to the IEM's weight, though the deep recessed 2-pin connectors ensure a secure connection.
Overall, the CU8 excels with a natural timbre and cohesive presentation, making it a strong choice for those seeking an analytical yet engaging signature across genres, though its weight and sparse accessories are minor drawbacks. The PUR vibration control system effectively enhances dynamics, allowing its four balanced armatures to perform with the impact of more complex driver setups.
Punch Audio Martilo Reviews
Punch Audio Martilo reviewed by: Gizaudio Axel
2025-07-25
7.5
Reviewer Score
Great basshead set with strong technical chops. Great value, fun, and engaging without sacrificing clarity. Boosted, clean, and textured bass. Mids are surprisingly clear for a bassy set. Treble’s smooth and non-fatiguing. The bass might be too much for some.Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
Boom — time for bass. Punch Audio’s Martilo is a tribrid (2×8 mm DD + 2 BA + 1 micro planar) coming in around $330. The package is stacked: sturdy square case, extra filters, multiple tip sets, and a genuinely excellent modular 3.5/4.4 cable that lays flat, has no microphonics, and a firm chin slider. The shells are ergonomic with venting, metal nozzles with a proper lip, and a small nozzle diameter (5.9/5.0 mm) that helps seal; comfort and passive isolation are both strong.
Sonically, this is unapologetically bass-focused without being bass-only. Expect massive sub-bass depth and a punchy mid-bass, yet the low end stays tight, controlled, textured and doesn’t bleed. Mids retain clarity with non-shouty presence, while treble is crisp, smooth, non-fatiguing with decent extension (not ultra-airy). For a bass-heavy set, technical performance is solid: detail is good, and imaging/separation keep busy tracks coherent and energetic.
Against Hisenior’s Mega5EST Bass Plus, Martilo hits harder, feels more engaging, and offers better vocal clarity — and it steamrolls on value at the lower price. Compared with Xenns Tea Pro, the Tea Pro is a bass-lover all-rounder that spotlights vocals/instruments more; Martilo goes full bass-head with bigger rumble and impact. Ideal for listeners who crave deep slam but still want clarity, comfort, and great accessories; not for neutral/reference chasers. Final verdict: 4/5 — it truly punches above its price.
Punch Audio Martilo reviewed by: Tim Tuned
5.5
Reviewer Score
Strong bass, fun overall mids need improvement for the price Tim Tuned Youtube Channel
Punch Audio Martilo reviewed by: Jaytiss
8.6
Reviewer Score
Punch Audio Martilo reviewed by: Z-Reviews
7.2
* score normalized
The Punch Audio Martilo shows up screaming BASSHEAD on the box, but the tuning is smarter than that. A hybrid stack—2×8 mm DD + 2×BA + 1 planar—delivers bass that hits when the track calls for it, then gets out of the way. The surprise is the huge soundstage: airy, wide, borderline cinematic, so pianos, crowds, and live recordings feel expansive rather than claustrophobic. Low 9 Ω impedance and easy efficiency keep the power demands chill, though a low-impedance cable is recommended.
Tip rolling matters. With thin-wall silicone (e.g., Dunu S&S) the stage opens up and balance feels right; foams and some wide-bore options can push treble into a slightly sharp zone on certain tracks. Tonality reads clean and natural—warm-adjacent without a blanket—so everyday music stays unbloated, while proper sub-bass test tracks pressurize with that “firm hand on the chest,” not a sledgehammer.
Build is solid: thick, comfy modular cable with swappable plugs, flashy red shells, and a comically oversized box for a modest accessory set (silicone + foams). Street price around $330 lands in the sweet spot—easily justifying $375 by ear. Think “poor man’s Mega 5 EST Bass Plus”: similarly satisfying slam and stage, with the pricier set showing a touch more upper-mid/treble refinement. Not just for bassheads—more like a full-range thrill ride that lets music breathe and hit when it should.
Punch Audio Martilo reviewed by: Jays Audio
7.5
Reviewer Score
Cheaper, and slightly more energetic HBB Punch with slightly less mid-bass and slam. Endgame "balanced" basshead. Imaging feels sharper than Punch, but treble is not as smooth, aside from that very similar tech and low-end. Jays Audio Youtube Channel
Punch Audio Martilo reviewed by: IEMRanking AI
8
Reviewer Score
The Punch Audio Martilo delivers a powerful bass experience that dominates its signature, featuring a substantial 14dB sub-bass boost. This emphasis creates visceral, physical rumble, especially in electronic or hip-hop tracks, yet avoids overwhelming the lower mids due to a precise 200Hz crossover. While the dual dynamic drivers generate impressive slam and texture, a slight bloom can occasionally creep into the low-mids on very busy tracks, though it generally maintains better control than many bass-focused rivals.
Surprisingly, the midrange retains clarity and naturalness despite the bass foundation, handled competently by the Knowles balanced armatures. Vocals, both male and female, sound full-bodied and avoid the huskiness or recession common in bass-heavy tunings, while instruments like guitars retain decent texture. The planar magnetic driver contributes a smooth, non-fatiguing treble with adequate air and detail retrieval, though it doesn't quite reach the sparkle or ultimate extension of dedicated electrostatic tweeters.
Technical performance is solid for its price and tuning goal, offering a wide soundstage with good depth and effective layering, particularly impressive given the bass quantity. Imaging is precise enough for accurate placement of instruments. While the bass is the star, the overall presentation manages to avoid being a one-note experience, offering a fun yet reasonably balanced listen that works across more genres than typical basshead sets.
Heartfield CU8 User Reviews
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