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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-26 · 6 min read · Independent comparison
• Amazon Renewed TREBLAB Z2 — biggest strength: hybrid active noise cancelling paired with up to 35 hours of playtime, a 5-minute quick charge that yields about 2 hours of listening, IPX4 sweatproofing and a foldable carry case.
• Amazon Renewed TREBLAB Z2 — biggest trade-off: it is a renewed unit with a 90-day limited warranty, Bluetooth 5.0 instead of the newer 5.4 standard, and a heavier 9.03-ounce build.
• Gabba Goods Over-Ear Headphones — biggest strength: Bluetooth 5.4, three playback modes (Bluetooth, FM radio, SD card), USB-C charging with a 1.5-hour refill, and a light, foldable, travel-friendly frame.
• Gabba Goods Over-Ear Headphones — biggest trade-off: roughly 6 hours of playtime and sound isolation rather than true active noise cancelling, so it quiets the room far less than the Z2.
• Who each is for: the Z2 suits gym-goers, frequent flyers and anyone who hates charging; the Gabba Goods pair suits commuters, casual listeners and buyers who want radio and memory-card playback in one headset.
The Z2 is built around stamina and blocking out the world. TREBLAB rates the PlayXTend battery at 35 hours, and the spec sheet backs that up with a 3-hour charge time and a claimed 2 hours of playback from just 5 minutes on the cable. For anyone who trains four or five times a week, that means charging once and forgetting about it. The T-Quiet active noise cancelling is the headline feature here — it actively cancels external sound rather than just muffling it — and cVc 6.0 handles voice pickup on calls.
The audio chain is Bluetooth 5.0 with aptX and neodymium-backed 40mm dynamic drivers, running 32 ohms with a 20Hz–20,000Hz range and 93dB sensitivity. There is a 65ms gaming mode for low-latency video and mobile play, multipoint pairing, and a 3.5mm jack as a wired fallback when the battery runs dry. The pads are memory foam wrapped in ultra-soft materials, the earcups are oval and over-ear, and the whole thing folds into a rubberized case that measures about 6.5 by 3.54 by 8.07 inches and weighs the same 9.03 ounces as the headphones.
Gabba Goods Over-Ear Headphones: Who It's For
Gabba Goods takes a different route: maximum flexibility in a light frame. The 150mAh battery delivers up to 6 hours of playback and refills in about 1.5 hours over USB-C, and the foldable design plus LED charge indicators and low-battery voice prompts make it a low-fuss daily driver. The over-ear cups use a fabric, silicone and plastic build in beige, and the stated age range covers children, teens and adults — so it works as a shared household pair.
The connectivity story is where it separates itself. Bluetooth 5.4 gives you a 10-meter range and a newer radio standard than the Z2's Bluetooth 5.0, and you get three playback modes: Bluetooth streaming, FM radio and SD card playback. That last pair of options is genuinely uncommon — no phone required for a radio station or a loaded card. The 40mm speaker unit is paired with 32-ohm impedance and a 20Hz–20,000Hz frequency range, tuned for deep bass, crisp highs and rich mids. A built-in mic and multi-function buttons cover volume, track skipping and call answering.
One spec worth flagging: the product information lists 60-ohm impedance, while the feature copy states 32 ohms. That inconsistency is worth knowing before you buy, because higher impedance generally means a headphone wants more power to reach the same loudness from a phone. Noise control is listed as sound isolation, not active noise cancelling — the cups physically block some sound, but there is no ANC circuit.
Buy it if you want the latest Bluetooth, radio and SD playback, USB-C charging and a light travel-friendly set. Skip it if you need serious noise cancelling for flights or loud gyms, or if you want to go more than a day between charges.
Side-by-Side: Which Should You Choose?
• Best for battery life → Amazon Renewed TREBLAB Z2. 35 hours versus 6 hours is not a close contest.
• Best for workouts → Amazon Renewed TREBLAB Z2. IPX4 sweatproofing plus memory foam pads that are described as staying put during runs and jumps.
• Best for the newest Bluetooth → Gabba Goods Over-Ear Headphones. Bluetooth 5.4 beats Bluetooth 5.0 on paper.
• Best for offline and radio listening → Gabba Goods Over-Ear Headphones. FM radio and SD card playback need no phone at all.
• Best for charging convenience → Gabba Goods Over-Ear Headphones. USB-C and a 1.5-hour refill, versus 3 hours for the Z2.
• Best for long-haul travel and flights → Amazon Renewed TREBLAB Z2. ANC, a hard-ish carry case and a 3.5mm wired fallback for in-flight entertainment.
• Best for light, casual everyday wear → Gabba Goods Over-Ear Headphones. A foldable frame aimed at commutes, calls and multimedia rather than heavy training.
• Best for gaming and video sync → Amazon Renewed TREBLAB Z2. A 65ms low-latency mode plus multipoint pairing.
• Warranty consideration → Amazon Renewed TREBLAB Z2 comes with a 90-day limited warranty, which is shorter than what most people expect from a new headset — factor that in.
In my opinion, the Amazon Renewed TREBLAB Z2 is the stronger buy for most people comparing these two. Thirty-five hours of playback, active noise cancelling, IPX4 sweatproofing, quick charging and a bundled case are a lot of practical headphone for one purchase, and the 40mm aptX drivers cover both workouts and travel. I would only steer you to the Gabba Goods pair if the newer Bluetooth 5.4 radio, FM radio, SD card playback and USB-C charging matter more to you than ANC and battery life — which is a legitimate reason if you commute light and rarely fly. The 90-day warranty on the renewed Z2 is the one thing I would genuinely weigh before deciding.
FAQ
what is 40mm driver in headphones
A 40mm driver is the diameter of the speaker unit inside each earcup — 40 millimeters across. Both headphones here use 40mm drivers, which is a common size for over-ear models because it moves enough air for solid bass without making the cups bulky.
They are the circular speaker diaphragms that convert the electrical signal into sound. In both the TREBLAB Z2 and the Gabba Goods pair, a 40mm dynamic driver handles the full 20Hz–20,000Hz range, which covers essentially everything you can hear in music, calls and video.
which driver is best for headphones
There is no single best size — bigger drivers generally push more bass and move more air, while smaller ones can be lighter and faster. What matters more is the driver type and the tuning around it, so the honest answer is that a well-tuned 40mm dynamic driver like the ones in these two headphones is a sensible middle ground.
is 40mm driver good for headphones
Yes, 40mm is a good, versatile size for over-ear headphones. It is large enough for deep bass and enough volume with typical phone and Bluetooth output, and both of these models pair their 40mm drivers with similar 20Hz–20,000Hz frequency ranges.
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