If you want over-ear headphones for studio listening and a long, fixed setup, choose Superlux HD660PRO; if you need compact wired in-ear monitors for running, choose TINHIFI T5S. For running, the T5S’s in-ear form and detachable cable make it the more practical of these two designs, while the HD660PRO is built around a different job: closed-back listening with an audio interface or other wired gear.
Superlux HD660PRO vs TINHIFI T5S at a Glance
• TINHIFI T5S: Lightweight, 7.7 g-per-unit in-ear monitors with a 10 mm dynamic driver and detachable 2-pin cable; the trade-off is that they are wired and list no noise control.
• Choose the HD660PRO if you want an over-ear fit, closed-back isolation and connections suited to studio equipment.
• Choose the T5S if you prefer compact in-ear headphones for outdoor listening and want a replaceable cable connection.
• Neither model is wireless, so both require a wired connection during use.
The HD660PRO is an over-ear, closed-back headphone designed with recording and studio listening in mind. Its 40 mm dynamic drivers have a stated frequency range of 10 Hz to 30 kHz. The closed-back construction offers passive isolation, and the included 3.5 mm plug and 6.3 mm adapter suit a range of wired audio equipment.
Its 150-ohm impedance is worth considering before buying. The product is positioned for use with an audio interface, so I would look at it first for a desk-based setup rather than assuming it is the easiest match for every portable device. The 8.2-foot straight cable gives room to move around a workstation, but that length can be cumbersome when jogging or commuting.
The adjustable headband, swivel ear cups and velvet ear pads are aimed at longer listening sessions. If you want the best comfortable headband headphones for running, though, I would not start here: a full over-ear design and long cable are a poor fit for a run compared with an in-ear option. Skip the HD660PRO if your priority is a small, easy-to-carry workout headphone.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
TINHIFI T5S: Who It's For
The T5S is a wired in-ear monitor with a 10 mm dynamic driver, aluminum shells and a detachable 0.78 mm 2-pin cable. Each unit is specified at 7.7 g. That compact form makes it the more natural fit for someone who wants wired earbuds for outdoor activities or music on the move, provided they are comfortable with an in-ear design.
Its cable ends in a 3.5 mm plug, and the detachable connector means the cable is not permanently fixed to the earpieces. TINHIFI describes the driver diaphragm as a blend of three nano-materials, intended to balance rigidity and flexibility. Those details may appeal to buyers focused on the design, but they do not replace the basic practical question: do you want an in-ear fit, and does your listening device have a compatible wired connection?
For running, the T5S is the more suitable choice between these products because it avoids the HD660PRO’s over-ear cups and long straight cable. Still, it is not wireless, and the specifications list no noise control. If you need Bluetooth convenience or an explicitly stated noise-isolating feature, neither product answers that need. The T5S is also not a headband headphone, so skip it if you specifically prefer an over-ear fit.
• Best fit for running → TINHIFI T5S. Its in-ear form and 7.7 g-per-unit specification are better suited to moving around than the HD660PRO’s over-ear design and 8.2-foot cable. Both are wired, so neither removes the cable from your workout.
• Best for a studio desk or audio interface → Superlux HD660PRO. It is described for recording use and includes a 6.3 mm adapter alongside its 3.5 mm plug.
• Prefer closed-back over-ear headphones → Superlux HD660PRO. Its design provides passive isolation, unlike the T5S, which lists no noise control.
• Prefer in-ear monitors → TINHIFI T5S. Its aluminum earpieces and detachable 2-pin cable suit buyers who do not want a headband or ear cups.
• Want the longer stated frequency range → Superlux HD660PRO. Its specified response is 10 Hz–30 kHz; the T5S data gives a frequency range below 10 kHz to 10 kHz, so the figures are not directly comparable in a useful way.
• Want a detachable cable → TINHIFI T5S. Its 0.78 mm 2-pin connection is detachable; the HD660PRO’s cable is listed as a straight cable.
• Need a wireless option → Neither. Both models are wired, so look elsewhere if you want to run without a cable connected to your device.
• Want the best rechargeable over-ear headphones for running → Neither fits that description. The HD660PRO is over-ear but wired, while the T5S is an in-ear wired monitor; neither is specified as rechargeable.
The sound specifications also need a careful read. The HD660PRO’s 150-ohm impedance and the T5S’s 32-ohm impedance are listed figures, not a guarantee that one will sound better or work equally well with every device. The HD660PRO is explicitly aimed at audio-interface use. The T5S has a standard 3.5 mm connection, but the supplied information does not establish how it will perform with every phone, computer or portable player.
Build and comfort point in different directions, too. The Superlux offers an adjustable headband, swivel cups and velvet pads for an over-ear fit. The TINHIFI uses lightweight aluminum earpieces and a detachable cable. Those are distinct design priorities rather than a simple durability contest: the first is a full-size studio headphone, and the second is an in-ear monitor with a replaceable cable connection.
If the decision hinges on sound isolation, the HD660PRO has the clearer specification: closed-back construction and passive isolation. The T5S lists no noise control. That does not tell us how much sound either product blocks in a particular environment, but it does mean I would not choose the T5S expecting a stated isolation feature. For an outdoor run, remaining aware of your surroundings may also matter, so consider the listening environment rather than assuming isolation is always an advantage.
My Verdict
I would choose the TINHIFI T5S for running because its in-ear form is the more sensible match for movement than a closed-back headphone with an 8.2-foot cable. The detachable cable is another practical point in its favor. For studio listening, I would choose the Superlux HD660PRO instead for its over-ear closed-back design, 40 mm drivers and included 6.3 mm adapter. My running recommendation is specifically the T5S, with the important caveat that it is still wired.
FAQ
No. Both are wired models with a 3.5 mm connection. The HD660PRO also includes a 6.3 mm adapter, while the T5S has a detachable 0.78 mm 2-pin cable.
Neither is specified as having active noise cancellation. The HD660PRO is closed-back and lists passive isolation, while the T5S lists no noise control.
The HD660PRO is the more clearly studio-oriented choice. It is described for recording and audio-interface use, and its package includes a 6.3 mm adapter; the T5S is an in-ear monitor with a detachable cable.
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