Descrizione
A Closed Back Headphone Has One Job, And It Is Not Isolation. It is to keep the space around the music free of the room you are sitting in. An open design leaks the room in and the music out, which is why it belongs in a quiet studio and nowhere else. This pair solves the problem the other way, with sealed earcups and a topology diaphragm inside.
The specification is unusually honest about what it is. The vocalism principle is dynamic, there are two drivers, and the frequency response runs from 15 Hz to 35,000 Hz, which is the sort of extended upper range that usually costs a serious amount more. Impedance sits inside a 33 to 100 ohm band with the rated figure at 60 ohms and a sensitivity of 100 decibels, so a portable player will drive it without a separate amplifier, and a desktop amp will not overpower it. The material is ABS, the cable runs 1.5 metres, and the plug is an L-bend at 3.5 millimetres, which is the shape that survives a phone in a pocket.
There is no active noise cancellation and no control buttons on the cups, which some buyers will read as a missing feature and others as the point. ANC circuitry adds a noise floor and a battery to a wired headphone, and buttons add a circuit between the driver and the ear. What is left is a sealed, wired, over-ear design at 60 ohms that asks nothing of a battery and gives nothing to the room.
One listener, one signal path, nothing in between.
Key Features
- ✦ Sealed, closed-back over-ear design with a topology diaphragm
- ✦ Dynamic driver configuration with two drivers
- ✦ Frequency response from 15 Hz to 35,000 Hz
- ✦ Impedance in the 33 to 100 ohm band with a rated 60 ohms and 100 dB sensitivity
- ✦ Wired connection with a 3.5 mm L-bend plug and a 1.5 metre cable
- ✦ No active noise cancellation circuitry, keeping the signal path passive
- ✦ ABS housing for light weight over long listening sessions
- ✦ Driven comfortably by a portable player or a desktop amplifier
Technical Specifications
- Brand: HIFIMAN
- Model: HE-R9
- Category: Over-ear headphones, wired
- Vocalism principle: Dynamic
- Number of drivers: 2
- Diaphragm: Topology diaphragm
- Frequency response: 15 Hz to 35,000 Hz
- Impedance: 33 to 100 ohm range, rated at 60 ohm
- Sensitivity: 100 dB
- Earcup type: Sealed
- Active noise cancellation: No
- Control buttons: No
- Volume control: No
- Connection: Wired, 3.5 mm
- Plug type: L-bend
- Cable length: 1.5 m
- Housing material: ABS
- Certification: CE
Where It Belongs
Open-plan offices and shared flats are where a closed back earns its keep, because the music stays in the earcups and the room stays out of the mix. Podcast editors working through a two hour interview prefer a passive headphone without ANC circuitry for the same reason a photographer prefers a mechanical shutter: one less thing adding to the signal. Buyers running a budget desktop amplifier get a 60 ohm load that sits in the easy range for almost any amp, and the 100 dB sensitivity means a phone or a laptop drives it directly without an external device. The extended frequency response to 35,000 Hz appeals to listeners working with high resolution files, where the upper harmonics are present in the recording but lost in playback. Travellers who dislike charging a battery before a flight will find the wired design a feature rather than a limitation, and the 1.5 metre cable with an L-bend plug is sized for a laptop on a tray table.
The EastSupplier Promise
Every unit is inspected before it leaves the warehouse. If a specification on this page does not match what arrives, we cover the return shipping and replace it. English-language support answers within one business day, and replacement parts for this category are stocked so a working unit stays working.
Frequently Asked Questions
Q: Does it have active noise cancellation?
No. The specification lists active noise cancellation as absent, and the design is deliberately passive. Sealed earcups reduce ambient noise by physically blocking it, without the circuitry and battery that active cancellation requires.
Q: Can I drive it from a phone?
Yes. At 60 ohms with 100 dB sensitivity, the load is light enough for a phone, a laptop or a portable player. A dedicated amplifier is optional rather than required.
Q: Is the cable detachable?
The headphone is wired with a 1.5 metre cable terminating in a 3.5 mm L-bend plug. The specification does not list a detachable cable, so treat the cable as fixed.
Q: What is a topology diaphragm?
It is the diaphragm design used in this model, referenced in the product title. The measured evidence of what it does is in the specification: a frequency response extending to 35,000 Hz with a dynamic, two-driver configuration.
Q: Is it good for studio monitoring?
It is sealed and passive with an L-bend 3.5 mm connection, which suits tracking and editing where isolation matters. For mixing decisions that depend on an open soundstage, an open-back design is the usual reference instead.
Q: What does the impedance figure mean for me?
The rated impedance is 60 ohms, inside a 33 to 100 ohm band. Lower impedance draws more current, which suits portable players. Sixty ohms is the middle ground that works well on both portable and desktop sources.
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