If you want closed-back, over-ear headphones with longer cable options for Switch, choose Superlux HD661; if you need compact, wired flat earbuds with a detachable cable for Switch, choose Pizen Senfer PT2021. The difference is not a contest over one universally better sound: it is a choice between an enclosed headphone design and a small earbud design. For a player deciding how to listen at a desk, on a commute, or in a shared room, that fit and setup distinction matters most.
• Superlux HD661: Closed-back, over-ear construction, a 40 mm dynamic driver, and two included cable lengths. Its trade-off is that it is a wired, over-ear headphone, not a compact earbud.
• Pizen Senfer PT2021: Flat-head earbuds with a 15 mm tungsten-coated driver and a detachable MMCX cable. Its trade-off is that its open nature can let sound escape, and it has no microphone.
• For a more enclosed listening setup: The Superlux’s closed-back design is the clearer fit on paper.
• For a small, replaceable-cable setup: The Pizen is the more compact, modular option.
• Choose the Superlux for: A desk or home setup where over-ear coverage and cable choice matter.
• Choose the Pizen for: A wired setup where small earbuds and a detachable cable are the priorities.
The Superlux HD661 is a closed-back, over-ear wired headphone with a 40 mm dynamic driver and a listed frequency range of 10 Hz to 20 kHz. Its stated sensitivity is 102 dB SPL at 1 mW and 1 kHz, and its impedance is 68 ohms at 1 kHz. Those figures describe the headphone’s audio design; they do not, by themselves, guarantee how loud it will sound with a particular device or tell you whether its sound will suit your preferences.
The everyday distinction is its enclosed, over-ear format. The product description positions the HD661 for monitoring and recording settings, and says its airtight design is intended for use around external noise. For Switch, that makes it the more obvious pick if you want headphones that surround your ears rather than small earbuds sitting at the ear. The included 1 m and 3 m cables also give you two wired setup options: a shorter lead for sitting closer to the console, or a longer one when your listening position is farther away. A carrying pouch and a 3.5 mm-to-6.3 mm conversion plug are included as well.
The compromise is portability and cable dependence. It remains an over-ear wired headphone, so it is not the choice for someone who wants the smallest possible setup. Its listed 68-ohm impedance is also worth noting when matching it to a source, though the listed figures alone do not establish how a particular Switch setup will drive it. I’d choose it for a more enclosed listening style and the flexibility of two cable lengths, not for wireless convenience.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-23 · 8 min read · Independent comparison
Who should skip it: Skip the HD661 if you specifically want flat earbuds, a detachable earbud cable, or a wireless listening setup.
The Pizen Senfer PT2021 is a wired, flat-head earbud with a 15 mm tungsten-coated diaphragm, a resin 3D-printed shell, and a detachable MMCX cable. Its listed frequency range is 20 Hz to 30 kHz, sensitivity is 110 dB/mW, and the version described here has 147-ohm impedance. The product information also mentions other impedance versions, but this comparison is about the 147-ohm configuration. As with the Superlux, those numbers are specifications rather than a promise of a particular sound from every source.
Its design is the main reason to consider it. The PT2021 offers an in-ear, flat-earbud format rather than an over-ear enclosure, plus a 1.2 m cable with a 3.5 mm plug. The cable is detachable, which gives the setup a different kind of flexibility from the Superlux’s included cable-length options. The maker describes a double-damping, triple-flute acoustic structure intended to reinforce bass in an open-style earbud design. That is relevant if you want a compact earbud but do not want the design to rely only on its open form for low-frequency presentation.
For Switch, this is the more portable-looking wired choice if you prefer earbuds and want to avoid an over-ear frame. But its open nature can allow sound to leak, and the listed information says it has no microphone. It also does not include a wireless connection or a USB-C charging feature. The detachable cable is a practical distinction, but it does not change the fact that the PT2021 needs a wired 3.5 mm connection.
Who should skip it: Skip the PT2021 if you need an enclosed headphone design, a built-in microphone, or wireless/USB-C charging.
• Best for a closed-back, over-ear fit → Superlux HD661. Its over-ear placement and closed-back style make it the more enclosed design of the two.
• Best for flat earbuds → Pizen Senfer PT2021. It uses an in-ear flat-head form, rather than ear cups that sit over the ears.
• Best for choosing between two cable lengths → Superlux HD661. It includes 1 m and 3 m cables, so you can select the lead that better suits where you sit.
• Best for a detachable cable → Pizen Senfer PT2021. Its MMCX cable can be removed, unlike the Superlux’s listed included cables.
• Best for a stated bass-focused acoustic feature in an open earbud design → Pizen Senfer PT2021. Its double-damping, triple-flute structure is specifically described as a way to reinforce lower frequencies.
• Best for monitoring-oriented use on the product description → Superlux HD661. Its stated use cases include live monitoring, studio work, and broadcast applications.
• Best for someone who wants microphone-free earbuds → Pizen Senfer PT2021. The listed product information says it does not have a microphone; that is a limitation for calls, but may not matter for game audio.
• Best for someone comparing ear clip headphones for Switch → neither is an ear clip model. The Superlux is over-ear, while the Pizen is a flat-head earbud. Choose based on which of those actual designs you prefer.
• Best for someone seeking neckband headphones for Switch → neither. Both are wired designs, and neither is described as a neckband.
• Best for someone searching for USB C charging bone conduction headphones for Switch → neither. Neither product is described as bone-conduction or USB-C rechargeable; both use wired 3.5 mm connections.
Buying Considerations
Next, look at how you plan to manage the cable. The HD661 comes with two cable lengths, 1 m and 3 m, but its listed design does not describe a detachable cable. The PT2021 has one listed 1.2 m cable, and that cable uses an MMCX detachable connection. If you want to choose between a short and long included lead, the Superlux has the more direct advantage. If cable removal is the priority, the Pizen has the relevant feature.
The connection details also help narrow the choice. Both are wired and list a 3.5 mm connection. The Superlux includes a conversion plug to 6.3 mm, which may be useful for equipment with that larger jack; it does not make the headphone wireless. The Pizen’s product information specifies a 3.5 mm line plug and does not list a microphone. Neither product is described as having Bluetooth, a neckband, bone conduction, or USB-C charging.
Finally, treat the driver and audio figures as context, not a shortcut to a guaranteed listening result. The HD661 lists a 40 mm dynamic driver, 68-ohm impedance, and a 10 Hz–20 kHz range. The PT2021 lists a 15 mm tungsten-coated diaphragm, 147-ohm impedance for this version, and a 20 Hz–30 kHz range. These figures describe different designs and do not establish which one you will prefer for games, music, or dialogue. For a Switch buyer, the practical decision is clearer: over-ear enclosure and included cable choices, or compact flat earbuds with a detachable cable.
I would choose the Superlux HD661 for Switch if I wanted a more enclosed over-ear fit, monitoring-oriented design, and the option of two included cable lengths. That combination gives it the more straightforward role for a stationary or home listening setup.
I’d choose the Pizen instead if my first priority were flat earbuds and a detachable MMCX cable. Neither is a match for someone specifically seeking ear clips, a neckband, or USB-C charging bone conduction headphones.
The Superlux is the closed-back over-ear option, while the Pizen is a wired flat earbud. Choose based on the fit and enclosure you want; both list a 3.5 mm connection.
No. The listed product information says the PT2021 does not include a microphone. It is described as a wired earbud with a detachable MMCX cable.
The Pizen Senfer PT2021 has a detachable MMCX cable. The Superlux HD661 is supplied with 1 m and 3 m cables, but its listed features do not describe those cables as detachable.
No. Both are described as wired products with 3.5 mm connections. Neither product information sheet describes Bluetooth, USB-C charging, a neckband, or bone conduction.
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