Yinyoo D2B4

| 4x Balanced Armatures | 2x Graphene Dynamic Drivers | 4-way crossover |

? Yinyoo D2B4, an affordable 6-driver earphone with premium specs.

The Yinyoo D2B4 features a 6-driver hybrid configuration with 4 balanced armatures + 2 dynamic drivers per earpiece.

The diaphragm of the dynamic drivers is made of graphene while the diameter is 10mm. To handle the hybrid drivers, Yinyoo packed a 4-way crossover inside the earpieces.

Despite the technical specifications of the drivers declaring a 6-driver configuration, the disassembly diagrams might seem to suggest that they actually contain 5 drivers (4 balanced armatures and 1 dynamic driver) but the 2 dynamic drivers are actually set in a row – a similar tech specs vs diagrams confusion could be seen while our team reviewed the Senfer DT8.

The housings of the Yinyoo D2B4 are built in aluminum 7050, which is an alloy frequently used in the aerospace industry.

The cables are detachable and make use of MMCX connectors, which are a widely used type of connector that grants a stable and secure attachment between the cable and the earpieces.

You can buy the Yinyoo D2B4 in:

Yinyoo D2B4 blue
Yinyoo D2B4 black

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Yinyoo D2B4 Review

Tests & Scores

Weight

Yinyoo D2B4 weight in Ounces and Yinyoo D2B4 weight in grams.

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Accessories & Packaging

The Yinyoo D2B4 unboxing results in a semi-hard case, 6 pair of eartips and the detachable MMCX cable.

The units comes inside a relatively small, rectangular box with a similar color en finish as the earpieces.

^9_/10

Bass & Sub Bass

A 6-driver hybrid earphone might make users expect a balanced and clean bass, instead, the Yinyoo D2B4 has a powerful bass response that shows a very punchy personality and a sub-bass that can get noticeably deep.

Using an EQ, their sub-bass gets insanely deep and their mid-bass much punchier.

During our extreme basshead tests, the Yinyoo D2B4 handled up to 30% of a FiiO A5 maximum power, unleashing a basshead impact and rumble that merits respect but will, still, not reach the top basshead models in our charts.

^_8.5_/10

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Mids & Vocals

The Yinyoo D2B4 midrange presents noticeable mid-bass bleed that can congest their lower midrange and male vocals. To their benefit, their overall mids will sound smooth/non-fatiguing and very relaxed – with sporadic harshy peaks.

Higher mids follow the style of their middle and lower mids, but do offer sufficient crispness for many average sessions.

Expect a profoundly warm experience with the midrange of the Yinyoo D2B4.

With an EQ, their vocals can be cleaned up a bit and their mid-bass bleed recessed from their invading strength, yet they will conserve their congested style.

^_6.75_/10

Highs & Treble

The Yinyoo D2B4 is averagely bright with a, definite, dark tint overruling them and a marginal amount of detail.

Their upper ends tends to a rolled-off response that can provoke this darkish and non-detailed response but can help to lower the chances of piercing peaks.

On the other hand, sibilance is present and might frequently show up on tracks prone to it.

An EQ can add some brightness, reduce a bit of their darkness and reveal some detail but no extreme makeover will happen.

^6.75_/10

Sound Leak

The sound leaking out of this Yinyoo earphone is slightly above average with a partial leak level that might be heard in less noisy situations but that will blend in while using it in daily city commuting.

^7.5_/10

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Sound Isolation

The sound isolation provided by the Yinyoo D2B4 is efficient and stronger than most average earphones. Nearly absolute isolation can be easily achieved when moderately cranking up the volume.

^8.5_/10

Comfort

The Yinyoo D2B4 has very smooth curves and rounded edges that never poke the ears nor generate discomfort.

In addition to this, the MMCX cable connections gives them a feel of stability – this is a very common connector that can also be found in earphones like the:

Yet, worth to highlight that the metal material of the earpieces catches up the environment’s temperature and can get cold during winter.

^9_/10

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Response to Equalization

The response to EQ of the Yinyoo D2B4 had shy effect over mids and highs but an exponential response over their bass empowering.

^7_/10

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Yinyoo D2B4 Scores

Accessories - 9/10
9/10
Design - 9/10
9/10
Bass - 8.5/10
8.5/10
Mids - 6.75/10
6.8/10
Highs - 6.75/10
6.8/10
Sound Leak - 7.5/10
7.5/10
Sound Isolation - 8.5/10
8.5/10
Comfort - 9/10
9/10
Response to EQ - 7/10
7/10
Value for Money - 5/10
5/10

Summary

Pros

✅ Powerful bass

✅ Premium specs

✅ Good looking

✅ Strong sound isolation

✅ Very comfortable fit

✅ Super durable build with aerospace-grade aluminum

✅ MMCX cables

✅ Case included

Cons

❌ Not a good cable – at this price point

❌ Dark highs

❌ Mid-bass bleed

Conclusion

After the results of the Yinyoo V2 in our past reviews, we were expecting a refined version of it with the Yinyoo D2B4 and it's six drivers but this was not the case as the D2B4 showed an opposite tuning to it's smaller sibling. In fact, they share some of the personality of BGVP DMG - only the personality of the BGVP DMG when used with a tight seal/vents blocking.

Listeners looking for a 6-driver hybrid earphone with a very bass-centered tuning and robust construction can take a look at the Yinyoo D2B4.

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7.7/10

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Yinyoo D2B4 Frequency Response Curve

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Yinyoo D2B4 Technical Specifications

Specifications

Type	6-Driver Hybrid
Driver Unit	2DD + 4BA
Sensitivity	102dB/mW
Power Capacity	5mW
Impedance	19 ohms
Frequency Response	20-40,000Hz
Diaphragm	Graphene
Magnet	Unknown
Cord	Y-type, MMCX
Cord Length	1.2m
Plug	Stereo mini plug
Weight	Approx. 15g
Supplied Accessories	6x Earphone tips, case, cable

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Photos

Yinyoo D2B4 Photos

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DISCLAIMER

We highly discourage anyone from trying to apply our testings to your own earphones, the risk of damaging or permanently breaking your iems is absolutely probable to happen. With our standardized equalization and amplification tests we push the limits of the earphones to the extreme. If anyway you decide to do so, we cannot be held responsible of the damage done to your equipment. Do it at your own risk.

Yinyoo D2B4

7.7

SCORE

7.7/10

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Yinyoo D2B4 – Review

Yinyoo D2B4