Philips 6000 series H6509

The Philips H6509 lands in the 98th percentile for ANC and the 93rd for battery life, delivering top-tier noise cancellation and 70 hours of playback. Sound is decent but not accurate, and build quality lags behind pricier rivals. At its new $225 price, it's still a solid deal but no longer the no-brainer it once was.

The 40mm drivers deliver a v-shaped sound that gets the job done for casual listening. Our data places overall audio quality in the 62nd percentile—solidly above average but no threat to the Sennheiser Momentum 4. Where the H6509 truly shines is active noise cancellation. It ranks in the 98th percentile, meaning it’s in the absolute best tier we’ve tested, effectively blocking out engine drone and office chatter. Transparency mode is there when you need to hear the world, and the companion app lets you tweak bass and set a power-off timer.

Call quality is decent but uninspiring, with the mic landing in the 67th percentile. Battery life, however, is a monster: 70 hours with ANC off and a quick 5-minute top-up nets 3 extra hours. That 93rd-percentile score means you’ll charge these once every few weeks of daily use. Low-latency mode helps for movies and gaming, though competitive players may still feel a tiny delay.

Against the Sennheiser Momentum 4, the H6509 ties on ANC effectiveness but falls short on audio fidelity—the Momentums are in a different league for sound junkies. The Bowers & Wilkins Px8 S2 offers a more refined design and richer sound, though their ANC is similar. Battery-wise, the Philips decimates the JBL Live 770NC by nearly double the playtime (70h vs roughly 40h). If noise cancelling and marathon battery life are your top priorities, the H6509 is still a strong contender, but with the Bose QuietComfort Ultra 2nd Gen now in the mix, you have a compelling alternative that delivers better build and mic quality for not much more money.

The value story here has shifted. At $225 (Amazon's current price), the H6509 is no longer the impulse-buy steal it once was. You're still getting top-tier ANC and monster battery life, but the price spread is wild, ranging up to $1049 across vendors. If you see it listed anywhere near that high, run. For that kind of cash you could grab a Bose QuietComfort Ultra 2nd Gen with vastly superior sound and build quality. At $225, the Philips still undercuts most flagships, but the gap has narrowed enough that you should cross-shop carefully before pulling the trigger.

The Philips H6509 punches well above its weight in noise cancellation and battery stamina, landing in the 98th and 93rd percentiles in our database. That means you’re getting adaptive ANC that rivals flagship models costing twice as much, paired with a legit 70-hour runtime when you leave ANC off. For gaming and work, it scores in the low 70s out of 100—good enough for most folks—but studio use is a total miss at 50. Owners largely agree, giving it a solid 4.5 stars across hundreds of reviews.

At 270 grams with memory foam cushions, these foldable cans are easy to live with. Bluetooth 5.3 and multipoint connectivity (95th percentile) keep you paired to two devices without fuss. The sound is a bass-forward affair, sitting in the 62nd percentile—enjoyable for pop and podcasts, but not for purists. Build quality is where corners get cut, landing in the bottom third of our rankings.

Studio musicians and critical listeners should pass. The sound profile, while energetic, isn’t accurate enough for monitoring or mixing, as our 50/100 studio score confirms. Build quality also lags at the 35th percentile—if you’re rough on your gear or want something that feels premium, consider the Sony ULT WEAR or JBL Live 770NC instead.

For headphones that cancel noise like a champ and go weeks without a charge, the Philips H6509 is still impressive. It's not the most refined listen, and the build feels budget-appropriate, but the combination of best-in-class ANC and 70 hours of stamina holds up. The price bump to $225 takes some shine off the value proposition, so casual listeners and commuters should weigh it against the newer Bose QuietComfort Ultra 2nd Gen and Sennheiser Momentum 4 before committing.