Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Aston - Stealth | Neumann - U 87 Ai |
|---|---|---|
| Max SPL | 144 dB | 127 dB |
| Type | Dynamic | Condenser |
Between the Stealth and U 87 Ai, the Stealth comes out ahead in max spl, while the U 87 Ai wins on type. Overall, the Stealth scores 61.9 and the U 87 Ai scores 44.5 on our Mars Score.
Which should you buy?
The Stealth is the clear pick on raw spec strength, leading by 17.4 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 Stealth if you care most about max spl. The biggest gaps in its favor are max spl. The single most decisive one: Max SPL — 13.39% more. 144 dB vs 127 dB.
Pick the U 87 Ai if you care most about type. Its strongest claims are type. The single most decisive one: Type: Condenser (vs Dynamic).
Both ship with comparable connection, so those specs do not separate the two — focus on the differences below.
Bottom line: the Stealth 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: Aston - Stealth or Neumann - U 87 Ai?
Aston - Stealth leads the current Mars Score by 17.4 points.The more useful decision is the trade-off behind that result: compare type, max spl against the way you will actually use the product.
Choose Aston - Stealth if…
Aston - Stealth has the measurable edge on max spl db.
Choose Neumann - U 87 Ai if…
Neumann - U 87 Ai has the measurable edge on type.
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 Aston - Stealth wins
- ▲Max SPL — 13.39% more. 144 dB vs 127 dB.
Why Neumann - U 87 Ai wins
- ▲Type: Condenser (vs Dynamic).
Spec comparison
Spec
| Spec | Aston - Stealth | Neumann - U 87 Ai |
|---|---|---|
| Type | Dynamic | Condenserlead |
| Polar pattern | Cardioid | Multi (3 patterns) |
| Frequency response | 30Hz–20kHz | 20Hz–20kHz |
| Max SPL | 144 dBlead | 127 dB |
Connectivity
| Spec | Aston - Stealth | Neumann - U 87 Ai |
|---|---|---|
| Connection | XLR | XLR |
| Headphone out | false | false |
| Built-in preamp | truelead | false |