Choosing audiophile over-ear headphones means deciding where you will listen and how much of the room should share the experience. Open-back designs involve the surrounding environment, while closed-back designs create a more contained setup. The four choices here also differ in condition, connector details, and listed price.
If you want a clear buying answer, start with the enclosure, then separate the new, used, and open-box listings. From there, the choice is between two closely related Monolith entries, the used Drop + HIFIMAN HE-5XX, and Fosi Audio i5 with its broad jack range.
Quick take
- For a closed-back enclosure with padded headband and earpads: Monoprice 143236 Monolith M1070C.
- For open-back studio monitoring: Drop + HIFIMAN HE-5XX, with a 3.5mm jack and a used-with-box condition.
- For several listed cable formats: Fosi Audio i5, which includes four jack types.
- For a close comparison between related Monolith listings: examine the model wording, condition, and enclosure details rather than expecting a radically different design.
Listed-price comparison
The listed-price range runs from $75 to $455.99, an absolute spread of $380.99. The two Monolith entries are $8.99 apart, while the HE-5XX and Fosi Audio i5 define the wider ends of the comparison.
| Headphones | Listed price | Price bar |
|---|---|---|
| Monoprice 143236 Monolith M1070C | $150.00 | |
| Monolith Over the Ear Closed Back Planar Magnetic Headphones | $158.99 | |
| Drop + HIFIMAN HE-5XX | $75.00 | |
| Fosi Audio i5 | $455.99 |
Decision matrix
- Enclosure priority: The two Monolith titles specify closed back; the HE-5XX and Fosi Audio i5 specify open back.
- Condition priority: The Monolith entries are listed as new, the HE-5XX is used with box, and the Fosi Audio i5 is open box.
- Studio-monitoring use: The HE-5XX specifically lists studio monitoring as a suitable use.
- Connector variety: The Fosi Audio i5 lists 2.5mm, 3.5mm, 6.35mm (1/4 in), and 4.4mm jacks. The HE-5XX lists a 3.5mm jack.
- Technical reference points: The M1070C description gives a 60Ω nominal impedance and 106mm planar driver; the Fosi Audio i5 lists 28 ohm impedance and a 97mm diaphragm. Those numbers should be treated as specifications, not automatic performance rankings.
Product notes
Monoprice 143236 Monolith M1070C Closed Back Planar Magnetic Headphones 3.5mm
At $150.00, the Monoprice 143236 Monolith M1070C offers a closed-back planar-magnetic route with a padded headband and earpads. Its description also calls out an extended soundstage, airy highs, and tight, deep bass in the enclosure, giving a listener several concrete reasons to focus on it for contained listening. The 60Ω nominal impedance and 106mm planar driver are useful reference points, but they do not by themselves establish a better match. The limitation is the design choice: anyone specifically seeking an open-back presentation should choose another entry. It is listed as new and black.
Monolith Over the Ear Closed Back Planar Magnetic Headphones W/ 3.5mm Connector
Monolith Over the Ear Closed Back Planar Magnetic Headphones W/ 3.5mm Connector is closely related to the Monoprice 143236 entry, not a different listening concept. At $158.99, it sits $8.99 above that listing while retaining the M1070C, 106mm planar-driver, and closed-back language. Choose it when the wired form factor, new condition, and M1070C description fit your setup. Its padded headband and earpads are described for extended listening. The limitation remains concrete: a closed-back design does not answer an open-back preference, so the HE-5XX or Fosi Audio i5 is more aligned with that use.
Drop + HIFIMAN HE-5XX Open Back Planar Magnetic Headphones - Used With Box
The Drop + HIFIMAN HE-5XX is the lowest listed-price entry at $75.00 and is marked Used With Box. Its open-back design, black color, headband form, and 3.5mm jack give it a straightforward profile for studio monitoring. The description emphasizes clarity and detail, while noting that the full sound experience reaches both listener and environment. Choose it when open-back listening and the listed used condition are acceptable. The limitation is the condition itself: shoppers who want a new or open-box unit may prefer one of the other entries, rather than treating the HE-5XX as equivalent to them.
Fosi Audio i5 Open-Back Planar Magnetic Headphones W/97mm Diaphragm Noise Cancel
Fosi Audio i5 stands apart for its listed jack range: 2.5mm, 3.5mm, 6.35mm (1/4 in), and 4.4mm. Its open-back planar-magnetic design is paired with a 97mm diaphragm, 10Hz-50kHz frequency-response listing, 28-ohm impedance, and a one-year manufacturer warranty. Choose it when multiple connector formats are central to the setup and the walnut wood chambers and memory headband appeal. The trade-off is concrete: its $455.99 listed price is the highest in this comparison, and its condition is open box. Those raw technical numbers are reference points, not proof of superior sound.
Final recommendation by use case
- For outside-noise control in a closed-back enclosure: choose the Monoprice 143236 Monolith M1070C, whose description explicitly combines a closed-back enclosure with outside noise staying out.
- For studio monitoring with an open-back design: choose the Drop + HIFIMAN HE-5XX if its used-with-box condition suits you.
- For multiple jack formats: choose Fosi Audio i5, the only entry listing 2.5mm, 3.5mm, 6.35mm, and 4.4mm connections.
- For choosing between the Monolith entries: the 143236 version has a listed black color, while the other title foregrounds its wired form factor; both center on the M1070C closed-back planar-magnetic design.
