V-MODA Crossfade M-100 vs 66 Audio BTS Pro

The M-100's sound signature can work really well with a wide range of music. Bass reproduction has good power and punch. The mids are also full and slightly forward over the other frequencies. This results in extra emphasis on the vocals and on mid-range sounds like guitars and keyboards. The highs are not peaky, which reduces their harshness, sounding smooth instead.

These headphones come with a SpeakEasy Mic cable and a Share Play cable. This gives you an option as to which cable you want to use at a given time. This also means that you will have a spare cable should you damage the other.

These have a solid, high quality feel to them, and you can tell that they will last you a long time. The ear cups are made of high quality plastic, while the headphones' yokes and headband are made of metal. The headband has a generous give yet does not feel flimsy at all. You can even twist it quite a bit yet it still won't feel like it will break.

The yokes can be collapsed and folded up into the headband. This reduces the overall size of the headphones, making them much easier to carry around.

You can detach the cable by simply pulling out the 3.5mm connector from the port on the headphones. The connector attaches with a satisfying click so it is less likely to get disconnected when in use.

The SpeakEasy cable has an in-line microphone with great noise cancelling. The cable also comes with an in-line 1 button remote which allows users to answer or end calls, as well as pause and play music tracks.

The SharePlay Cable features a 3.5mm pass-through port where a person can connect their own headphones. This means that you and another person can enjoy music from the same source.

Included is a clam-shell style case made of durable plastic so it should protect your headphones from scratches and minor impacts. Do note that you will have to detach the cable to make it fit inside the case.

The BTS Pro is quite robust and can withstand some minor splashes of sweat or rain as these are sweat-proof. They are not completely water-proof though, so you should not get them soaking wet.

There is good detail in the highs and the mids can also be heard clearly with very little muddiness. The lower frequencies are boosted, resulting in a good level of depth and power to each bass thump.

The BTS Pro ear cups sit on the ears with hooks keeping them in place. The flexible connecting band provides good clamping force and can adjust to your head size with continued use. Combined with cushioning on the cups, these are comfortable to wear and will stay in place.

Bluetooth connectivity allows the BTS Pro to connect with smartphones and compatible music players wirelessly, so cables won't be an issue.

66 Audio's Motion Control iOS App gives users added functionality, including EQ control and presets selection, battery status indicator, and even headphone position tracking. These features can improve the listening experience and also minimize the chances of you losing these headphones.

With up to 40 hours of playback time at full charge, it's more than enough for most listening sessions. You won't have to charge these frequently.

A hard shell carrying case is included, which can protect the headphones from minor impact and also make transport much easier. The case also has good aesthetics.

They are easy to bring on the go as the ear cups can be folded into the headband. This further reduces the already slim and compact size, making them easy to chuck into a bag when on the go.

The right ear cup of the BTS Pro features buttons for controlling headphone features. You can play/pause tracks, increase/decrease volume as well as answer/end calls by pressing the corresponding buttons, negating the need to pull out your phone to do so.

You do not need to take the BTS Pro off in order to answer incoming calls. There is a built-in microphone which allows you to easily take or make calls in the middle of your run or workout.