Sennheiser HD 650 vs Marshall Mode

The sound signature is near neutral but with a little emphasis on the lower frequencies. The bass is slightly forward with good punch and tightness. Explosions will have good rumble, without overpowering the other frequencies.
The mids are warm and clear, adding extra body to the sound. Game dialogue will be easy to hear.
Highs have good clarity, but are not forward in any way, so harshness is minimized.

The H650 is popular for its near neutral sound, which makes it quite versatile. The headphones can give a great casual listening, gaming, and movie watching experience yet are accurate enough for pro audio mixing. They are also lightweight and comfortable so you won't have any issues wearing them for hours.

Clamping force is not too tight. The ear pads and headband feature memory foam which are covered by velour material. The pads feel really soft on the head and allow airflow for minimized heat build-up/sweat.
The headband also features similar cushioning materials and minimizes pressure spots on the head.

The open ear cup design allows the sound to blend with your surroundings, giving it a natural width. It will also be easier to identify the direction of sounds, which can really help immersion.

The HD-650s do not feel heavy at all. They are usable for long music listening, movie or gaming sessions without feeling pain or strain on their head and neck.

While the cable connectors are proprietary, they can easily be removed from the ear cups with a firm pull. The popularity of these headphones means that there are a lot of aftermarket cables that can be bought.

While the Marshall Mode does not offer a lot of features or top-notch build quality, it makes up for it with great sound quality. The bass has a slight emphasis which gives the sound good power and punch. The mids sound natural and slightly forward, while the highs are able to deliver a good level of detail without getting harsh. These earphones sound best for rock music, but can also deliver great low-end performance for hip-hop music and similar genres, and crisp highs for those who love classical music.

These earphones won’t cause comfort issues, even when worn for for several hours straight.. The earpieces are light so they don’t put a lot of weight in the ears.

With the Marshall Mode, you’ll be able to get a good fit and seal in your ears. You get 4 pairs of ear tips in different sizes to choose from. The ear tips are also of decent quality, as they are not too squishy, so they should sit well in the ears and last a reasonable period of time as well.