Audio-Technica Solid Bass ATH-CKS5TWBL

The Audio-Technica ATH-CKS5TWBL deliver the best sound quality we've ever measured in a true wireless earbud, with explosive bass and incredible 15-hour battery life. The ANC is practically useless, build quality is mediocre, and firmware issues plague many units. If you can find them around $50-60, they're an absolute steal for bass heads, but avoid inflated prices. Not recommended for fitness or anyone who needs reliable noise canceling.

Audio-Technica's Solid Bass ATH-CKS5TWBL are a throwback to a time when true wireless earbuds prioritized two things: bass that rattles your skull and battery life that just refuses to die. These aren't the newest kids on the block, and they don't pack the flashy ANC or waterproofing you'll find in 2024's flagship buds. But if you're someone who wants to feel every kick drum and never stress about charging mid-flight, they still have a story to tell. We pulled them into our testing database against hundreds of in-ears, and frankly, the numbers surprised us.

What we're looking at is a pair of earbuds built around a chunky 10mm dynamic driver with a dual-layer diaphragm, all wrapped in a Bluetooth 5.0 true wireless design. You get 15 hours from the buds themselves (yeah, you read that right) and another 30 in the chunky charging case. There's a built-in mic with Qualcomm cVc for calls, IPX2 drip-proofing, and a range of ear tips plus 3D loop supports for fit. It's a feature set that feels laser-focused on bass lovers and long-haul listeners, and not much else.

But here's the twist: that razor-sharp focus means compromises everywhere else. The active noise cancelation is barely a blip on the radar, the build feels cheap and plasticky, and customer sentiment is all over the place thanks to buggy firmware updates. Still, when a pair of earbuds lands in the 100th percentile for sound quality in our database, you pay attention. If you can snag them for the right price, these are a niche gem. If you pay the wrong price, you'll feel robbed.

Let's talk about that sound score first because it's the main event. The 10mm drivers with the dual-layer diaphragm deliver a frequency response from 5Hz up to 40kHz, and in our tests they absolutely crushed it, landing in the top tier of our entire database. Bass is deep, controlled, and genuinely fun, but there's enough clarity in the mids and highs to keep vocals from turning into mud. Whether you're blasting EDM or a bass-heavy hip-hop track, these earbuds sound far better than their aging specs suggest. They support AAC and aptX codecs, so you're not stuck with bottom-tier Bluetooth compression either, though the lack of LDAC or aptX HD stings a little for Android purists.

Battery life is another standout. Those 15 hours in the buds alone put them well ahead of most current true wireless models, which tend to hover around 6 to 8 hours. Add the case and you've got 45 hours total, which is firmly in road-trip territory. Connectivity over Bluetooth 5.0 is solid, though not flawless; we've seen occasional dropouts at range, and the pairing process feels dated compared to newer chipsets. The mic with Qualcomm cVc does a decent job for calls, keeping your voice clear even with background chatter, but it's not best-in-class. Comfort is about average, the 70th percentile meaning most people will find a secure seal with the included tips and loop supports, but those with smaller ears might struggle with the bulky housings.

Pricing on these things is a complete rollercoaster. We've seen them listed as low as $54 on Amazon from reputable sellers with free delivery, which is where the value proposition suddenly gets interesting. At that price, you're getting top-tier sound and class-leading battery life for less than a tank of gas. But then there are third-party vendors asking $2,000, $5,000, or even an absurd $9,393. Obviously, that's not the real price, but the spread shows how messy the market is for these aging buds. Our advice: never pay more than $70 for the ATH-CKS5TWBL. If you see a deal around $50-60, it's a steal for the audio quality alone. Just make sure the seller has a solid return policy in case you get a lemon with firmware issues.

When you line these up against modern competitors, the trade-offs become crystal clear. The Sennheiser MOMENTUM True Wireless 4 outclasses them in build quality, ANC, and overall polish, but you'll pay triple the price. Samsung's Galaxy Buds3 Pro offer a more balanced sound with genuinely useful ANC and a much sleeker design, though their battery life can't touch the Audio-Technica's. If you're on a budget and want ANC, the EarFun Air Pro 4+ is a better all-rounder, but its sound signature is less exciting than the Solid Bass. For gym rats, the JBL Endurance Peak 4 with its IP68 rating is a far smarter choice, the IPX2 here just won't survive a heavy sweat session.

The Sony LinkBuds Fit fall somewhere in the middle: they have decent ANC, a more secure fit for activity, and respectable sound, but they again cost significantly more. So the ATH-CKS5TWBL occupies this weird space where they're basically unbeatable for pure bass enjoyment and battery endurance, but you have to forgive everything else. They're not the safe choice for most people, but they're the fun choice for a specific kind of listener.

Fitness enthusiasts should look elsewhere; the IPX2 drip-proofing is nowhere near enough for serious workouts, and the fit isn't secure enough for running or jumping. Instead, grab the JBL Endurance Peak 4 with its IP68 rating and ear-hook design. If you need strong active noise cancelation for commuting or focus, these will frustrate you, the ANC is barely functional. In that case, the Samsung Galaxy Buds3 Pro or even the EarFun Air Pro 4+ are far better investments. And if you're someone who expects a premium, substantial feel from your earbuds, the plastic build and flimsy case hinge here will annoy you every time you pick them up.

If you're a bass lover on a tight budget who wants earbuds that can literally last an entire waking day on a single charge, the ATH-CKS5TWBL are a no-brainer at the right price. Stick them in your ears, fire up your favorite playlist, and you'll be smiling until the battery finally gives out sometime next week. The audio quality is genuinely high-end, and that alone justifies the purchase if you find them under $70. But you have to go in knowing the trade-offs: the ANC is a joke, the build won't win any beauty contests, and the firmware can be flaky.

For anyone who needs something for the gym, or who can't stand the thought of buggy updates crashing their listening session, this isn't your bud. Grab the JBL Endurance Peak 4 for workouts or step up to the Samsung Galaxy Buds3 Pro for a more polished daily driver. The Solid Bass are a specialty item, a one-trick pony maybe, but that trick happens to be a really good one.