Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | 64 Audio - U12t | Sennheiser - IE 600 |
|---|---|---|
| Driver count | 12 | 1 |
| Impedance | 12 Ω | 18 Ω |
| Sensitivity | 115 dB | 118 dB |
Between the U12t and IE 600, the U12t comes out ahead in driver count / impedance, while the IE 600 wins on sensitivity. Overall, the U12t scores 79.3 and the IE 600 scores 61.5 on our Mars Score.
Which should you buy?
The U12t is the clear pick on raw spec strength, leading by 17.8 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the U12t if you care most about driver count / impedance. The biggest gaps in its favor are driver count, impedance. The single most decisive one: Driver count — 11.00 more. 12 vs 1.
Pick the IE 600 if you care most about sensitivity. Its strongest claims are sensitivity. The single most decisive one: Sensitivity — 2.61% more. 118 dB vs 115 dB.
Both ship with comparable detachable cable, so those specs do not separate the two — focus on the differences below.
Bottom line: the U12t is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: 64 Audio - U12t or Sennheiser - IE 600?
64 Audio - U12t leads the current Mars Score by 17.8 points.The more useful decision is the trade-off behind that result: compare driver count, impedance, sensitivity against the way you will actually use the product.
Choose 64 Audio - U12t if…
64 Audio - U12t has the measurable edge on driver count, impedance ohm.
Choose Sennheiser - IE 600 if…
Sennheiser - IE 600 has the measurable edge on sensitivity db.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why 64 Audio - U12t wins
- ▲Driver count — 11.00 more. 12 vs 1.
- ▲Impedance — 6.00 Ω less. 12 vs 18.
Why Sennheiser - IE 600 wins
- ▲Sensitivity — 2.61% more. 118 dB vs 115 dB.
Spec comparison
Drivers
| Spec | 64 Audio - U12t | Sennheiser - IE 600 |
|---|---|---|
| Driver count | 12lead | 1 |
| Driver types | 12 Balanced Armature | Dynamic (TrueResponse) |
| Impedanceⓘ | 12 Ωlead | 18 Ω |
| Sensitivityⓘ | 115 dB | 118 dBlead |
Build
| Spec | 64 Audio - U12t | Sennheiser - IE 600 |
|---|---|---|
| Detachable cable | true | true |
| Connector | 2-pinlead | MMCX |