AirPods Max (Lightning) vs ATH-R70xa
impedanceを並べて確認。
impedanceを理解する
Impedance determines how much voltage is needed to drive a headphone to a given volume.
Categories
- 16–32 Ω — IEMs, most consumer cans. Run loud from a phone.
- 32–80 Ω — premium portable headphones. Phone works; dedicated amp adds headroom.
- 150–250 Ω — studio/Hi-Fi (DT 770, HD 600 family). Need a real amp.
- 300–600 Ω — pro studio. Definitely need an amp.
Why high-impedance exists
Higher-impedance drivers can be wound with thinner wire, allowing tighter motor systems and more accurate transient response — at the cost of needing more voltage to drive.
Sensitivity matters too
A 32 Ω headphone at 85 dB/mW sensitivity may be quieter than a 300 Ω one at 110 dB/mW. Always read impedance + sensitivity together.
この対戦ATH-R70xa's 470Ω is roughly 4600% higher than AirPods Max (Lightning)'s 10Ω (a 460Ω gap). Whether that gap is noticeable depends on workload — small percentage gaps rarely change day-to-day experience, while gaps of 20% or more usually do.
impedanceとは？
A headphone's electrical resistance to AC current, in ohms (Ω). Low-impedance (16–80 Ω) headphones run loud from any phone; high-impedance (250–600 Ω) need a dedicated amplifier.
Impedanceの詳しい解説を読む →この比較の他のスペック
完全な ヘッドフォン カテゴリをMars Score順で見る。