We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-30 · 7 min read · Independent comparison
If you want a genuinely flat, studio-grade monitoring tool with a sealed closed-back design and pro accessories in the box, choose Superlux HD661; if you need a foldable, travel-friendly over-ear with memory foam pads and a wider, more forgiving fit for long mixing and casual listening sessions, choose Tissting Over Ear Headphones.
• Superlux HD661 biggest strength: A true sealed studio monitor built around a 40mm neodymium dynamic driver, with a wide 10Hz–20,000Hz frequency band that reaches far deeper into the low end than most headphones in this class.
• Superlux HD661 biggest trade-off: With 68Ω impedance and 102dB sensitivity, it's less efficient than the Tissting, so it wants a little more from your source and it isn't the first pick for casual phone listening on the bus.
• Tissting Over Ear Headphones biggest strength: A foldable, swiveling design with memory foam ear pads, an adjustable headband and a very high 110dB sensitivity — easy to drive and easy to pack.
• Tissting Over Ear Headphones biggest trade-off: Its frequency range starts at 20Hz rather than 10Hz, so the very lowest sub-bass octave simply isn't in its spec sheet, and its build is ABS plastic rather than a dedicated monitoring enclosure.
• Who each is for: Superlux HD661 is for engineers, broadcasters and anyone who wants a sealed, flat-response monitor. Tissting is for travelling listeners, home mixers and buyers who prioritize comfort and portability.
The HD661 is a closed-back, over-ear monitor headphone finished in green, with a neoprene enclosure material and a 40mm dynamic driver using a neodymium magnet. Neodymium is the detail worth pausing on: it's a strong magnet type, and Superlux pairs it with a 102dB SPL (1mW) sensitivity rating and 68Ω impedance at 1kHz. That combination tells you this is a headphone designed to be driven properly — not necessarily loudly off a weak source, but cleanly off an interface, mixer or headphone amp.
The headline number for a flat-response conversation is the frequency band: 10Hz to 20,000Hz. That's the full audible range with a decade of extra reach at the bottom compared to the Tissting's 20Hz floor. Superlux describes the tuning as high resolution and balanced, which is exactly the language you want for monitoring work — the goal isn't a smiley-face curve that flatters music, it's a response that lets an engineer hear what's actually in the recording. The airtight sealed design is the other half of that equation: it lets you work in noisy rooms without the outside world bleeding in, which is why live monitoring and broadcast are called out as its natural habitats.
Buy the HD661 if you're mixing, tracking, editing dialogue or doing any work where the low end needs to be audible and trustworthy, and if you already own something with a bit of output to drive it. Skip it if you want a headphone to fold into a jacket pocket, or if you plan to run it straight off a phone at high volume — the 68Ω load and moderate sensitivity mean it rewards a real source.
Tissting Over Ear Headphones: Who It's For
The Tissting is a different animal. It's a foldable over-ear with swiveling ear cups, a collapsible frame and memory foam ear pads, built from ABS plastic in black. Where the Superlux is a fixed, purpose-built monitor, the Tissting is designed around getting into a bag and coming back out again without complaint.
The numbers here are 20Hz–20,000Hz with 110dB sensitivity. That 20Hz floor is the honest limitation — it covers the standard range most music lives in, but it doesn't claim the sub-bass extension the Superlux does, so if your work depends on hearing the very bottom of a kick drum or a synth's lowest octave, you're working with less information. What you get in exchange is efficiency: 110dB sensitivity means this thing gets loud off almost anything, including a phone, a laptop headphone jack or a basic audio interface.
The comfort story is where the Tissting earns its place. Memory foam pads that contour to the ear, an adjustable headband with multiple settings, and a snug fit that reduces pressure points over long sessions — that's the spec sheet describing a headphone you can wear for a three-hour mixing pass without constantly shifting it. The swivel cups and folding mechanism mean it packs flat, and the standard 3.5mm jack means no adapter hunting when you move between a phone, a computer and an interface. ABS is a sensible material choice for something that lives in a backpack.
Buy the Tissting if portability, comfort and easy driving matter more to you than maximum low-end reach, or if you're doing casual mixing and everyday listening rather than critical studio work. Skip it if you need the deepest possible bass extension or a sealed monitoring enclosure built for loud live environments. Note too that the manufacturer warranty runs 90 days, which is shorter than you might assume, so treat it as a well-priced everyday tool rather than a lifetime investment.
• Best for flat, full-range monitoring → Superlux HD661. A 10Hz–20,000Hz band with a balanced tuning is the more honest reference for critical listening.
• Best for sub-bass extension → Superlux HD661. Its response reaches a full octave lower than the Tissting's 20Hz start.
• Best for use with weak sources / phone listening → Tissting Over Ear Headphones. 110dB sensitivity versus 102dB makes it noticeably easier to drive.
• Best for travel and packing → Tissting Over Ear Headphones. The foldable, swiveling collapsible frame is the whole point of its design.
• Best for long-session comfort → Tissting Over Ear Headphones. Memory foam pads and a multi-setting adjustable headband are built for extended wear.
• Best for studio and broadcast environments → Superlux HD661. The sealed closed-back, airtight design is made for high external noise.
• Best for cables and adapters included → Superlux HD661. Two cable lengths plus a 3.5mm-to-6.3mm gold-plated adapter, a clip and a pouch come in the box.
• Best for build material confidence → Superlux HD661. A neoprene enclosure and dedicated monitor construction versus ABS plastic.
In my opinion, the Superlux HD661 is the headphone I'd buy if the goal is accurate, flat-ish monitoring with real low-end extension — the 10Hz–20,000Hz band, the 40mm neodymium driver, the sealed enclosure and the two included cables all point at someone doing actual audio work. The 68Ω impedance is the one thing to plan around; feed it a proper source and it makes sense. I'd recommend the Tissting instead if you're a traveller, a casual mixer or someone who wants a comfortable, easy-to-drive over-ear that folds away — just accept the 20Hz floor and the 90-day warranty. Both are sensible; they're just aimed at different desks.
FAQ
does frequency response matter in headphones
For critical mixing, I'd point to the Superlux HD661: 10Hz–20,000Hz coverage, a 40mm neodymium dynamic driver and a balanced, high-resolution tuning in a sealed closed-back enclosure. The Tissting is still workable for lighter mixing, but its 20Hz floor and ABS build make it the more casual option of the two.
That's clearly what they were designed for. The collapsible frame and swivel ear cups let them pack flat, the memory foam pads are built for extended wear, and the adjustable headband keeps the fit stable. The 110dB sensitivity also means they play loud off a phone without extra gear.
Not necessarily, but it helps. At 68Ω with 102dB sensitivity it's moderately demanding, so a phone will drive it but won't get the best from it. A laptop, audio interface or dedicated headphone amp will give you cleaner output and more headroom. The Tissting, at 110dB, is the easier of the two to drive directly.
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