We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-17 · 7 min read · Independent comparison
If you want a rugged, over-ear DJ workhorse with deep bass, a swivel/fold body and pro adapters in the box, choose adj American Audio; if you need a lightweight in-ear with a semi-open, wide-stage tuning and a machined aluminum build, choose syeindunce Tangzu Xiao Qiao.
• adj American Audio — biggest strength: A true over-ear pro DJ design with extended bass, a 64-ohm dynamic driver, a huge 5Hz–30kHz range, and a foldable body with a silver carrying bag plus two 1/4-inch adapters.
• adj American Audio — biggest trade-off: It's a bulky 16-ounce wired headphone with no active noise control (noise control listed as None), so it's built for the booth, not the bus.
• syeindunce Tangzu Xiao Qiao — biggest strength: A 10mm dynamic driver IEM with a graphene diaphragm, semi-open back for a wider soundstage and tighter bass, and 5-axis CNC-machined aluminum chambers in a 3D-printed resin shell.
• syeindunce Tangzu Xiao Qiao — biggest trade-off: It's an in-ear bud, so it depends on fit for isolation and bass, and it's wired 3.5mm only with no adapter or carry case mentioned.
• Who each pick is for: Pick the adj American Audio if you're a DJ or studio user who wants over-ear isolation and folding portability; pick the syeindunce Tangzu Xiao Qiao if you want a pocketable, precision-tuned IEM for critical listening on the move.
The adj American Audio HP700 is, first and last, a pro DJ headphone. Everything in the spec sheet points that way: over-ear cups, a 64-ohm impedance, and a frequency range that stretches from 5Hz all the way to 30kHz. That low-end reach is where the "extended bass" claim lives, and in a DJ context that's exactly what you want — kick drums you can feel, and a bottom end that doesn't disappear under club noise.
The design is practical rather than precious. It's a wired headphone with a 3.5mm jack, and it ships with two adapters — one straight 1/4-inch stereo adapter and one right-angle 1/4-inch. That right-angle adapter is a small thing that matters a lot if you're plugging into a mixer or a controller where the jack sits in an awkward spot. There's also a silver carrying bag, which tells you the body folds or collapses enough to travel. At 16 ounces it's a substantial piece of gear, not something you forget you're wearing — which is fine for a booth, less fine for a commute.
syeindunce Tangzu Xiao Qiao: Who It's For
The syeindunce Tangzu Xiao Qiao is a completely different animal. It's an in-ear monitor built around a single 10mm dynamic driver with a graphene diaphragm, and the whole design brief is about squeezing maximum acoustic performance out of a tiny shell. The semi-open back is the headline feature: by reducing internal air pressure, it lets the driver breathe, which the spec sheet ties directly to a wider soundstage, more accurate imaging, tighter bass and clearer mids. If you've ever felt that closed IEMs sound boxed-in, this is the design answer to that.
The build is genuinely interesting. The acoustic chambers are 5-axis CNC-machined aluminum, and the shells are 3D-printed resin shaped to fit the ear canal ergonomically. That combination — metal chambers for rigidity, resin for fit and comfort — is a deliberate engineering choice, not a marketing one. The faceplate is an open-frame metal design that cuts weight and improves ventilation while adding durability. Impedance is 20 ohm and sensitivity is 111dB, which tells you these are easy to drive: a phone dongle or a basic player will get them loud without strain. Frequency range is 20Hz–20kHz, a standard full-range spec, and it's a wired 3.5mm connection.
Who should buy it: listeners who care about imaging and soundstage, people who want a comfortable in-ear for long sessions, and anyone who appreciates a machined-metal build in a lightweight package. Who should skip it: anyone who needs active noise cancellation, wireless, or an over-ear feel. The noise control here is sound isolation, which depends entirely on how well the resin shell seals in your ear — and no two ears are the same.
• Best for DJ and booth work → adj American Audio. Over-ear cups, 64-ohm driver, right-angle 1/4-inch adapter, and an extended 5Hz–30kHz range built for low-end authority.
• Best for soundstage and imaging → syeindunce Tangzu Xiao Qiao. The semi-open back design is specifically engineered to widen the stage and tighten the bass.
• Best for portability → syeindunce Tangzu Xiao Qiao. A resin in-ear with a lightweight open-frame metal faceplate disappears into a pocket; the 16-ounce adj does not.
• Best for plugging into pro gear → adj American Audio. Two 1/4-inch adapters ship in the box, one straight and one right-angled.
• Best for long listening sessions → syeindunce Tangzu Xiao Qiao. The 3D-printed ergonomic shell and 20-ohm/111dB efficiency make it easy to drive and easy to wear.
• Best for build materials → syeindunce Tangzu Xiao Qiao. 5-axis CNC aluminum chambers plus a 3D resin shell is a more exotic construction than a rubber-enclosed over-ear.
• Best for blocking outside noise → adj American Audio. Passive over-ear cups physically cover the ear, while the semi-open IEM deliberately vents and relies on seal-based isolation.
• Best for a single do-everything headphone → adj American Audio. It's the more versatile pick if you also want to use it for mixing, gaming or monitoring at a desk.
If I had to pick one, I'd buy the adj American Audio. My reasoning is simple: it does more jobs. The extended bass, the 64-ohm driver, the two 1/4-inch adapters and the folding body with a carry bag make it a complete DJ and monitoring tool out of the box, and over-ear cups give you reliable coverage in a loud room. The syeindunce Tangzu Xiao Qiao is the more refined, more interesting piece of engineering, and for pure critical listening with a wide stage I'd genuinely reach for it. But if you want one wired headphone that handles a gig, a desk and a practice session without fuss, the adj is my pick. Check both current prices on Amazon and let your actual use case decide.
The connection you'll use is wired — 3.5mm with two included 1/4-inch adapters. The spec sheet lists Bluetooth, NFC, RF and aptX under wireless technology, but the headphone jack is 3.5mm and the design is a wired pro DJ headphone with a carrying bag.
Partially. Its noise control is listed as sound isolation, which comes from the resin shell sealing in your ear, not from active cancellation. Because the back is semi-open, it vents air by design — great for soundstage, less effective at shutting out a noisy room than a fully closed IEM.
Both aim at bass, but differently. The adj American Audio advertises extended bass with a range down to 5Hz and a 64-ohm driver, which suits a thick, physical low end. The Tangzu Xiao Qiao uses its semi-open design for tighter, more controlled bass rather than sheer quantity.
No. At 20 ohm impedance and 111dB sensitivity they're efficient, so a phone with a dongle or a basic player will drive them easily. The adj American Audio's 64-ohm impedance is still manageable, but it benefits more from a proper source with some output power.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.