The HE75 V2 TMR is a variant of Epomaker’s HE75 V2 that utilizes TMR (Tunnel Magnetoresistance) sensing technology. The core change lies not in the keyboard’s structure or typing feel, but in the type of sensor used on the PCB—shifting from Hall-effect sensors to TMR sensors. A more significant distinction is switch compatibility: while the standard HE75 V2 supports only magnetic switches, the TMR version features a hybrid hot-swappable PCB, allowing for the use of both magnetic switches and traditional 3-pin or 5-pin mechanical switches. In this context, TMR serves not merely as a “lower-power sensing solution,” but also as a vehicle for Epomaker to explore a “dual-purpose” board design.
I. What TMR Brings—and What It Doesn’t
According to Epomaker’s official comparison, the fundamental difference between TMR and Hall-effect technology lies in their sensing principles: Hall-effect sensors detect voltage changes caused by fluctuations in a magnetic field, whereas TMR sensors detect changes in electrical resistance. The potential advantages of TMR include higher sensitivity and lower power consumption—the latter theoretically benefiting the battery life of wireless keyboards.
However, Epomaker explicitly notes that TMR technology does not automatically make a keyboard faster or more accurate. A keyboard’s response speed and precision depend on the entire signal chain—including the switches, sensors, PCB, calibration, firmware, and software. If any part of this chain underperforms, the inherent advantages of the sensor cannot be realized. A well-tuned Hall-effect keyboard can easily outperform a poorly tuned TMR-based one.
The same applies to the typing feel. TMR changes how the keyboard “perceives” the movement of a key, not how the key “feels” when pressed. The typing experience is determined by the switches, springs, keycaps, stabilizers, gasket structure, and internal dampening materials—none of which are affected by the type of sensor used.
II. The Real Differentiator: Hybrid Hot-Swappability
The standard HE75 V2 utilizes Hall-effect sensors and is compatible exclusively with magnetic switches. In contrast, the PCB of the HE75 V2 TMR supports hot-swapping for both magnetic switches and traditional 3-pin or 5-pin mechanical switches—a compatibility design rarely seen in magnetic-switch keyboards. The practical significance of this design is that users can equip specific keys—such as the WASD cluster—with magnetic switches to take advantage of adjustable actuation and “Rapid Trigger” functionality, while outfitting the remaining keys with their preferred mechanical switches to retain a traditional typing feel and sound. For users who desire the competitive edge of magnetic switches without sacrificing the tactile experience of mechanical switches, this offers a solution that eliminates the need for two separate keyboards.
III. Shared Hardware Foundation
The TMR version shares most of its hardware specifications with the standard model; the primary differences lie in the sensors and switch compatibility.
The keyboard features a 75% layout, comprising 80 keys and a rotary knob. The knob can be removed and replaced with two additional keys. It utilizes a gasket-mounted structure, paired with an FR4 mounting plate and five layers of acoustic dampening (latex sandwich foam, IXPE switch-underlay, PET acoustic sheet, sound-absorbing foam, and a bottom silicone pad).
It comes equipped with Epomaker Creamy Jade magnetic switches, which are pre-lubricated from the factory. These switches have an actuation force of 30gf, a bottom-out force of 55gf, and a total travel distance of 3.5±0.1mm, with an adjustable actuation point ranging from 0.1mm to 3.5mm.
Connectivity options include a tri-mode setup: USB-C wired, 2.4GHz wireless, and Bluetooth. The wired and 2.4GHz modes support an 8000Hz polling rate, while the Bluetooth mode operates at 125Hz. The scanning rate is 128kHz. Nominal latency is 0.1ms for wired, 0.58ms for 2.4GHz, and 15ms for Bluetooth.
The keyboard houses an 8000mAh battery (comprising two 4000mAh cells). While this is a substantial capacity for a 75% wireless keyboard, it is worth noting that some reviews indicate a charging power of only 3W, meaning a full charge can take nearly 24 hours.
The keycaps are made of polycarbonate (PC) with a “Cherry” profile and a translucent, frosted finish; the legends are applied via screen printing. Opinions on the keycaps are divided: some argue that the translucent tops enhance the RGB lighting effects, while others find that the blending of the legends with the translucent areas creates a “cluttered” look. Additionally, the surface is rather smooth and prone to showing fingerprints.
IV. Positioning
The product concept behind the HE75 V2 TMR can be summarized as follows: by utilizing TMR sensors and a hybrid hot-swappable PCB—while maintaining a 75% layout, tri-mode connectivity, and an 8000Hz polling rate—it offers the flexibility to use both magnetic and mechanical switches.
Its hardware-level strengths are clear: a gasket-mounted structure, five layers of internal dampening, factory-tuned stabilizers (described in reviews as having “zero wobble”), a high-capacity battery, and the versatility of supporting both magnetic and mechanical switches. Its shortcomings, however, lie in the software; there is a noticeable gap between the high level of hardware refinement and the unpolished state of the driver software and firmware logic.
For users seeking a single keyboard that combines the competitive edge of magnetic switches with the tactile feel of traditional mechanical switches, the HE75 V2 TMR offers a unique option—a rarity in the current market. However, if “Rapid Trigger” functionality is your primary use case, be prepared: the maturity of the driver and firmware may not quite match the impressive specifications of the hardware. Furthermore, it is worth checking the status of the “hidden” shortcuts triggered via the FN+Shift key combination immediately upon receiving the device.
