Headphones with a higher impedance of around 250 Ohms and above are then more suitable for playback from really powerful signal sources or using a headphone amplifier, otherwise the sound coming out of them might not be loud enough. For wired pairs, the focus is on the strength of the joint between the headphones and the cable, as this is where many cheaper wired headphones fail.

The volume button is a long rectangular rocker that hugs the edge of the earcup with a raised dot on one end but is smooth on the other--this helps you differentiate by feel which end corresponds to volume up, and which one is volume down. I bought these to listen to dnb with as my old ones had the ear parts wearaway but these are phenomenal sound quality compared to my last. But for what they ARE--solid performing, no-frills, Bluetooth headphones--you really can't ask for more than what these JVC's deliver, and you might even be surprised by what they bring to the fight. Today we are reviewing two cheap models made by JVC - the HA-S31M-A which is the wired version and the HA-S31BT which as the name suggests connects via Bluetooth. In fact, you might be hard-pressed to notice much of a difference between the regular and Bass Boost mode playback--my daughter actually couldn't tell them apart.Guess I should sell em online to someone who thinks jvc makes the best of everything like I used to think.

Although these are over-the-head headphones that are normally characterized by their bulky nature, this model can be folded into a more compact form. If you are looking for headphones with a good bass performance, you should aim for lower range values (bass represents frequencies up to about 256 Hz), while high range values (frequencies roughly above 2,048 Hz) will be better for reproducing high tones. Yes, they are on-ear cans, but the inward clamping pressure is relatively low, but not so feather-light as to be loose on your head--those of you sensitive to on-ear pressure (like me) may still be able to go a few hours or more before you start to notice any discomfort. The lower impedance value (approximately 100 to 150 Ohms) is suitable for playback from mobile phones, laptops or other portable players that do not have a powerful enough amplifier. On the other hand, the limiting factor of wireless headphones is a certain delay in sound transmission between the source and the headphones (almost indistinguishable for the average user), and they also need to be charged regularly.It's particularly important to choose headphones with a good acoustic seal for travelling, to avoid annoying your fellow passengers. Once powered up, a single short press of the button gives you a tone in the headset for Bass Setting 1 ("regular"--I guess), another press gets you two tones for the Bass Settings 2 ("boost" mode. I found that the Bass Boost mode simply "filled out" the sound signature--it gave the music and bit more heft and bite in the mid-bass and midrange in general. The JVC HA-S31BT are affordable on-ear wireless headphones that support both Google Assistant and Siri voice assistants. While off, a 1-second press will turn the headphones on, and a 3-second press will turn the headphones off.

The extra bass settings provides additional body, but not overwhelming, working well on different types of music.

This auto-connect feature is great if you mostly use them with one device, but it can be annoying when the last used device is in another room. The earcups pivot inward so the whole set folds down flat though sadly you get no pouch or soft-touch bag for packing.