Sennheiser CX 80S

The CX 80S delivers 91st percentile sound and 95th percentile comfort for around USD 25, which is frankly absurd for the Sennheiser name. But build quality sits at the 34th percentile and calls score just 36/100, so this is a music-first, durability-last purchase. If you want wired clarity on a budget and don't need a good mic, this is one of the best values in our database.

The 9.7mm dynamic driver pushes a 17Hz-20kHz frequency range through a 28Ω impedance, and our sound score of 91st percentile backs up what owners are saying: clear, balanced, and detailed. This is Sennheiser's house sound on a budget, no bloated bass, no harsh treble spikes. The transparency noise control means no active cancellation, just passive isolation from the ear tips, which lands at a solid 65th percentile for ANC. That's about average for wired buds, but the three included tip sizes help seal out a decent amount of ambient noise.

Where things fall apart is the mic. The 40th percentile mic score and 36/100 calls rating mean this is not your work-from-home headset. The one-button smart remote handles play/pause and calls, but owners report button control issues, and the call quality just doesn't hold up. If you're buying these for music, you'll be happy. If you're buying them for Teams meetings, you'll be frustrated.

Against the Soundcore P31i and EarFun Air Pro 4+, the CX 80S takes a completely different path. Those are wireless buds with ANC, batteries, and Bluetooth, while the CX 80S is a wired, passive-isolation earphone. The Sennheiser wins on raw sound quality per dollar, our 91st percentile sound score beats what you'd expect from wireless buds at this price. But the Anker Space A40 and JLab JBuds Pods ANC offer features the CX 80S simply can't match: wireless freedom, active noise cancellation, and better mic performance for calls. The Baseus Bass BP1 Pro will also satisfy bass heads in a way the CX 80S won't. If you want a no-frills wired IEM with great tuning, the Sennheiser is the pick. If you need calls, wireless, or bass, look elsewhere.

At USD 25 in the US and EUR 30-39 across DE, ES, and FR, the CX 80S is aggressively priced for the Sennheiser name. The EUR spread of EUR 9 across three listings means it's worth checking which store_name has the EUR 30 deal before you buy, that's a meaningful difference on a budget bud. Our budget score of 63.9/100 reflects the tension here: you're getting 91st percentile sound and 95th percentile comfort for less than the cost of a pizza night, but the 34th percentile build quality means you might be buying them again in a year. For pure sound-per-dollar, this is hard to beat. For longevity-per-dollar, the math gets murkier.

The Sennheiser CX 80S lands in our database with a comfort score in the 95th percentile, which is the absolute best right now for wired ear-tip buds at this price. That's the headline. An 11g build with three ear tip sizes means these practically disappear in your ears, and the angled 3.5mm connector keeps the cable from fighting your pocket. Sound quality sits at the 91st percentile, which is a standout for a pair that costs around USD 25 in the US and EUR 30-39 across Europe.

But the numbers also tell a less flattering story. Build quality and connectivity both sit at the 34th percentile, which is disappointing for a brand like Sennheiser. The mic lands at the 40th percentile, and calls score just 36/100, the weakest area by far. User sentiment comes in at 32nd percentile with a 72/100 score from 12 pieces of evidence. Owners love the clarity and value, but durability complaints keep popping up.

Skip these if you need a reliable call headset, the 36/100 calls score and 40th percentile mic make that a non-starter. Bass lovers should also look elsewhere, the weak low-end is the most consistent complaint from owners. And if you're hard on your gear, the 34th percentile build quality and thin cable mean these probably won't survive your lifestyle. Anyone who needs wireless, active noise cancellation, or a durable daily driver should spend a bit more on the Anker Space A40 or EarFun Air Pro 4+ instead.

The CX 80S is a classic case of Sennheiser putting their money where it matters most: the driver. 91st percentile sound and 95th percentile comfort at USD 25 is a genuinely impressive combo, and the 4/5 rating from 2047 reviews backs that up. But the 34th percentile build quality and 36/100 calls score are real compromises. Buy these for music, treat them gently, and don't expect them to survive years of daily abuse. The 2-year warranty helps, but a warranty doesn't fix a dead earbud mid-commute.