Between the U 87 Ai and SM58, the U 87 Ai comes out ahead in type, while the SM58 wins on max spl. Overall, the U 87 Ai scores 48.6 and the SM58 scores 82 on our Mars Score.
Which should you buy?
The SM58 is the clear pick on raw spec strength, leading by 33.4 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 U 87 Ai if you care most about type. The biggest gaps in its favor are type.
Pick the SM58 if you care most about max spl. Its strongest claims are max spl.
Both ship with comparable connection, so those specs don't separate the two — focus on the differences below.
Bottom line: the SM58 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Neumann - U 87 Ai wins
- ▲Type: Condenser (vs Dynamic).
Why Shure - SM58 wins
- ▲Max SPL — 18.11% more. 150 dB vs 127 dB.
Spec comparison
Spec
| Spec | Neumann - U 87 Ai | Shure - SM58 |
|---|---|---|
| Type | Condenserlead | Dynamic |
| Polar pattern | Multi (3 patterns) | Cardioid |
| Frequency response | 20Hz–20kHz | 50Hz–15kHz |
| Max SPL | 127 dB | 150 dBlead |
Connectivity
| Spec | Neumann - U 87 Ai | Shure - SM58 |
|---|---|---|
| Connection | XLR | XLR |
| Headphone out | false | false |
Frequently asked
Spec-level deep dives
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