66 Audio BTS Pro vs SoundPEATS Q9A

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.

The bass of these in-ear headphones is pretty powerful. It has great depth and punch. Mids are full and rich so vocals, guitars and keys can easily be heard. The highs are rolled off, so sparkle on the high frequencies is not that prominent, but this also results in a smoother sound that is easier on the ears.

Due to the bass-centric sound signature, these in-ear headphones are best for hip-hop, EDM and dance genres.

These headphones will stay in place even if you get active. The combination of the lightweight earpieces along with the integrated ear-hooks mean that these headphones will not dislodge easily.

These headphones are not prone to damage due to getting wet thanks to its sweat resistance. You can run or do similar activities using these headphones with no issues. These are still not water resistant though so submerging these in water can still cause damage.

These in-ear headphones have remote function buttons built into the earpieces, along with a microphone. This means that you do not have to pull out your smartphone in order to control basic music functions or to answer/end calls.

Along with the in-ear headphones, you get a shirt clip, flexible bands for managing the headphone cable, three pairs of ear tips in different sizes along with a soft case and a pouch for easy transport of these headphones when on the go.