Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | KZ - ZAR | ThieAudio - Monarch MKIII |
|---|---|---|
| Impedance | 26 Ω | 22 Ω |
| Sensitivity | 108 dB | 112 dB |
| Driver count | 8 | 10 |
Between the ZAR and Monarch MKIII, the ZAR comes out ahead in several specs, while the Monarch MKIII wins on impedance / sensitivity. Overall, the ZAR scores 65.4 and the Monarch MKIII scores 72.9 on our Mars Score.
Which should you buy?
The Monarch MKIII edges ahead on the Mars Score (65.4 vs 72.9), but the 7.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The ZAR does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the Monarch MKIII if you care most about impedance / sensitivity. Its strongest claims are impedance, sensitivity, driver count. The single most decisive one: Impedance — 4.00 Ω less. 22 vs 26.
Both ship with comparable detachable cable, so those specs do not separate the two — focus on the differences below.
Bottom line: the Monarch MKIII 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: KZ - ZAR or ThieAudio - Monarch MKIII?
ThieAudio - Monarch MKIII leads the current Mars Score by 7.5 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 KZ - ZAR if…
KZ - ZAR does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose ThieAudio - Monarch MKIII if…
ThieAudio - Monarch MKIII has the measurable edge on impedance ohm, sensitivity db, driver count.
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 KZ - ZAR wins
- No decisive advantages.
Why ThieAudio - Monarch MKIII wins
- ▲Impedance — 4.00 Ω less. 22 vs 26.
- ▲Sensitivity — 3.70% more. 112 dB vs 108 dB.
- ▲Driver count — 2.00 more. 10 vs 8.
Spec comparison
Drivers
| Spec | KZ - ZAR | ThieAudio - Monarch MKIII |
|---|---|---|
| Driver count | 8 | 10lead |
| Driver types | 1DD + 7BA Hybrid | 1DD + 6BA + 2EST + 1 Bone Conduction Tribrid |
| Impedanceⓘ | 26 Ω | 22 Ωlead |
| Sensitivityⓘ | 108 dB | 112 dBlead |
Build
| Spec | KZ - ZAR | ThieAudio - Monarch MKIII |
|---|---|---|
| Detachable cable | true | true |
| Connector | 0.78mm 2-pinlead | 2-pin |