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Side-by-side comparison — scores, specs and which one fits your setup.
Specs comparison
Analysis
The Sennheiser HD 650 scores 9/10 with 300Ω impedance and 103dB sensitivity. At 300Ω, it benefits significantly from a dedicated amplifier.
The Bose QuietComfort 45 scores 7.8/10 with 32Ω impedance and 102dB sensitivity. At 32Ω, it can be driven directly without extra hardware.
Based on our scoring, the Sennheiser HD 650 scores higher overall. However, the right choice depends on your full audio chain — use our analyzer to see which fits your actual setup.
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A high headphone score doesn't mean your audio sounds great. Your DAC, amp or source might be the real bottleneck.