AV Lounge

High Fidelity Audio

HMD 025

EMT · HIFI

HMD 025

A true mono moving-coil transducer built for authentic microgroove record playback.

The EMT HMD 025 stands as a definitive statement of intent for the serious archivist and vinyl purist. While modern high-fidelity systems frequently rely on electronic switching or stereo cartridges to sum monophonic records, this component approaches the medium with structural integrity. It leverages a dedicated single-axis generator that responds solely to the lateral modulations of classic microgroove pressings, ensuring that background ticks, surface scratches, and tracing noise from the vertical plane are completely ignored. Positioned within the HIFI range as the premier choice for vintage mono collections, the HMD 025 takes the core engine that drove international radio networks for half a century and removes mounting restrictions. By replacing the historical, proprietary studio headshell with a standard half-inch threaded top block, EMT enables seamless compatibility with premium modern tonearms. It represents an essential tool for unlocking the profound historical scale hidden inside recordings from the golden age of vinyl. Sonically, the HMD 025 completely shifts the perception of what a single-channel recording can achieve. It exposes an exceptionally solid, robust, and central sonic column that projects into the listening room with immense visceral authority and physical scale. The midrange possesses a rare, tactile density that makes vintage vocals and brass ensembles sound astonishingly alive, completely avoiding the thin or ghost-like perspective common when playing mono discs on stereo hardware.

Key Features

01

True Mono Moving-Coil Generator

Utilizes a single-axis motor design that responds exclusively to lateral groove movements, systematically eliminating vertical surface noise and crosstalk.

02

Spherical Diamond Stylus

Features a highly polished 25-micron spherical tip engineered specifically to ride perfectly within the wider groove profiles of classic mono microgroove pressings.

03

Blue-Anodized Aluminium Body

Milled from a solid block of aircraft-grade alloy to establish a low-resonance mechanical ground and allow standard half-inch top-down cartridge mounting.

04

Nickel-Plated AlNiCo Magnet

Driven by a traditional AlNiCo magnetic assembly that maintains constant flux linearity, preserving the lifelike warmth and presence of historical recordings.

05

High-Output Architecture

Delivers a muscular 1.05mV output signal to achieve an excellent signal-to-noise ratio when paired with standard high-quality moving-coil phono preamplifiers.

The True Mono Advantage

Chapter 01

The True Mono Advantage

Playing a mono record with a standard stereo cartridge forces a compromises because stereo generators are engineered to detect both vertical and horizontal geometric vectors. Any warp, vertical pit, or surface blemish on a mono disc is actively translated as noise. The HMD 025 circumvents this mechanical flaw entirely by employing a dedicated lateral engine that rejects vertical tracing errors, delivering a starkly quiet background that lets the genuine performance step forward.
Broadcast Scale for Modern Arms

Chapter 02

Broadcast Scale for Modern Arms

The internal architecture of the HMD 025 is derived directly from the legendary TSD series that set global standards for radio-broadcast consistency. Hand-built piece by piece in Switzerland by trained precision technicians, each generator is aligned manually under microscope before being housed in its distinctive blue aluminum shell. This specialized 12-gram chassis provides excellent mechanical grounding and a stable physical platform, perfectly suited for modern medium-to-high mass tonearms.
Listening Notes

Chapter 03

Listening Notes

On the turntable, the HMD 025 immediately impresses with its immense structural weight and rhythmic focus. It uncovers a shocking layer of dynamic realism, punch, and spatial depth within single-channel masterings that stereo cartridges routinely flatten out. String sections acquire a rich, woody resonance, and drums hit with a tight, physical snap, proving that vintage mono tracking remains an incredibly high-resolution experience when approached with correct engineering.

Specifications

DiamondSPH 025
CantileverAluminium
TransducerMC Mono
CoilCopper 4N
MagnetAlNiCo, nickel-plated
BodyAluminium
Connection1/2" – 4pin
Vertical tracking angle23°
Weight12g
Tracking force2,4g
Output voltage1mV @ 5cm/s
Compliance12µm/mN
Frequency response20 - 20‘000Hz
Impedance24Ω
Recommended load200 - 300Ω