WLM 300 B – Vienna loudspeaker manufacturer presents a highly efficient reference loudspeaker for low powered tube amps

There are loudspeakers that ask for muscle, current and a firm hand on the reins. And then there are loudspeakers that come alive with a handful of watts, revealing precisely the qualities for which many music lovers turn to valves in the first place. The WLM 300 B, first presented by Wiener Lautsprecher Manufaktur GmbH at HIGH END Vienna 2026, clearly belongs to the latter school. It is conceived as a reference loudspeaker for so-called Low Powered Tube Amps: amplifiers whose appeal is not measured in raw output figures, but in colour, timing, touch, spatial candour and the immediacy of musical expression. Its name is no decorative flourish either, as the WLM 300 B takes its cue from the legendary 300B triode, a valve of modest power yet almost mythical standing among discerning audiophiles.

Key Facts WLM 300 B

• New reference loudspeaker by Wiener Lautsprecher Manufaktur GmbH, first presented at HIGH END Vienna 2026
• Designed for Low Powered Tube Amps and refined valve amplifiers
• Inspired by the legendary 300B amplifier tube
• Sensitivity of 96 dB
• Full sonic potential available from just 2 watts of amplifier power per channel
• Large AMT tweeter with a low crossover frequency of 900 Hz
• Solid-wood horn milled from a single block
• 12-inch Tetracoil mid/bass driver
• Main system frequency response down to below 36 Hz
• Optionally expandable with an active subwoofer system using two 18-inch Tetracoil subwoofers
• Complete system specified by the manufacturer as linear from 22 Hz to 22 kHz
• Cabinet made from solid pearwood with wall thicknesses of up to seven centimetres
• Individually manufactured in close consultation with the customer
• Price depending on finish and configuration between € 28.000,- and € 42.000,-

WLM 300 B – A Homage to the Queen of Valves

The 300B is far more than an old amplifier tube with a loyal following. For many audiophiles, it represents a distinct way of listening: vivid, open, tonally saturated, direct and, at its best, disarmingly natural. Its charm lies partly in the fact that it achieves this with very little power. Its limitation, naturally enough, is that very few loudspeakers are truly comfortable partners for it.

This is exactly where the WLM 300 B enters the picture. It has not been developed as a general-purpose High-end loudspeaker that also happens to work with tubes. It is a loudspeaker that takes this particular amplifier culture seriously from the outset. With a sensitivity of 96 dB, it is intended to unfold its full potential from as little as 2 watts per channel. That makes it an obvious candidate for single-ended triodes, classic valve circuitry and, of course, the amplifier solutions developed by Wiener Lautsprecher Manufaktur GmbH itself.

High Efficiency Instead of Power Dependency

Finding the right loudspeaker for Low Powered Tube Amps can become a long and occasionally frustrating pursuit. A low-output amplifier does not merely require a loudspeaker that plays loudly enough. It needs one that remains unforced, tonally composed and dynamically free, without compression, strain or obvious compensation tricks. The WLM 300 B is intended to meet precisely this brief.

According to Wiener Lautsprecher Manufaktur GmbH, the loudspeaker preserves the character of the amplifier connected to it rather than imposing a fixed sonic signature of its own. A single-ended triode should therefore be allowed to show its delicacy and shading. A classic valve amplifier should be able to express its harmonic warmth. A more modern amplifier should be free to demonstrate its precision. In this sense, the WLM 300 B is less a loudspeaker that dictates terms, and more a highly sensitive translator of musical intent.

Large AMT Tweeter and Solid-Wood Horn

For the treble range, Wiener Lautsprecher Manufaktur GmbH uses a particularly large AMT tweeter. The striking point is not merely its scale, but the unusually low point at which it is integrated. The crossover frequency is set at just 900 Hz, with the aim of achieving a particularly coherent presentation across a large part of the musically critical frequency spectrum.

The AMT is supported by a horn milled from solid wood. This sits entirely within the philosophy of Wiener Lautsprecher Manufaktur GmbH, where technical purpose and material substance are not treated as separate matters. The horn is intended to combine dynamics, naturalness and spatial precision, while helping the transition into the midrange and bass region to remain seamless.

12-Inch Tetracoil – Large Radiating Area for the Midrange

The midrange and bass are handled by a 12-inch Tetracoil mid/bass driver. This reflects a clear conviction on the part of Wiener Lautsprecher Manufaktur GmbH: generous cone area is not only useful in the bass, but can also be highly valuable in the midrange, provided the handover to the tweeter is executed without audible discontinuity. It is this combination of surface area, speed and careful integration that is intended to give the WLM 300 B its particular character.

Even without additional subwoofers, the main system is specified by the manufacturer as reaching linearly down to below 36 Hz. That is notable not only because of the loudspeaker’s technical ambition, but also because Wiener Lautsprecher Manufaktur GmbH positions the WLM 300 B as a design suitable for domestic spaces. It is not meant to be a monumental specialist reserved only for dedicated listening rooms. Rather, it is intended as a reference loudspeaker whose authority is expressed through musical scale and composure, not through sheer cabinet bulk alone.

Optional Active Subwoofer System

Those who want the lowest octaves delivered with still greater authority can expand the WLM 300 B with an active subwoofer system. In this configuration, two 18-inch subwoofers with Tetracoil technology are used. The aim is to extend the fullrange system down to 22 Hz while retaining the sense of ease that is often hardest to achieve precisely in the bass.

For the complete system, Wiener Lautsprecher Manufaktur GmbH specifies a linear frequency response from 22 Hz to 22 kHz. This turns the WLM 300 B into more than a high-efficiency loudspeaker for valve amplifiers. It becomes a mature fullrange concept, aimed at scale, physical presence, resolution and musical self-evidence.

Solid Pearwood and True Manufacture

The cabinet follows the same uncompromising line. It is made from solid pearwood, worked from the full material and constructed with wall thicknesses of up to seven centimetres. Such a construction is not simply a matter of visual presence. It is above all intended to reduce resonance and provide a mechanically stable platform for the drive units.

The WLM 300 B is therefore intended to possess a tangible, timeless, crafted presence. It is not an industrially anonymised loudspeaker, but an object with material depth, weight and character. As with other loudspeaker systems from Wiener Lautsprecher Manufaktur GmbH, the WLM 300 B is produced in different versions and in close consultation with its future owner.

All Benefits at a Glance

• Ideal for Low Powered Tube Amps
  With its 96 dB sensitivity, the WLM 300 B is designed for amplifiers that derive their quality not from high output power, but from nuance, tone colour and musical flow.
• Musical authority from just a few watts
  From as little as 2 watts per channel, the WLM 300 B is intended to make its full sonic potential available.
• Coherent reproduction through low AMT integration
  The crossover frequency of 900 Hz is intended to ensure a particularly seamless connection between treble, midrange and the presence region.
• Dynamics through generous cone area
  The 12-inch Tetracoil mid/bass driver is designed to combine speed, body and continuity without thinning out the midrange.
• Fullrange option for the lowest octaves
  With the optional active subwoofer extension and two 18-inch Tetracoil subwoofers, the complete system is specified by the manufacturer as reaching down to 22 Hz.
• Manufacture rather than serial anonymity
  Solid pearwood, wall thicknesses of up to seven centimetres and individually specified versions underline the emphasis on craftsmanship, substance and personal configuration.

Price and Availability

The WLM 300 B was first presented by Wiener Lautsprecher Manufaktur GmbH at HIGH END Vienna 2026. As is customary with the company’s loudspeaker systems, this model is produced in different versions and in close consultation with its future owners. The price ranges from € 28.000,- to € 42.000,- depending on finish and configuration. Details regarding specific versions, finishes and delivery times are available from Wiener Lautsprecher Manufaktur GmbH on request.

Conclusion

The WLM 300 B is a loudspeaker with a very clear position. It is not trying to flatter every amplifier by force; it is aimed at music lovers who understand the attraction of refined valve circuits and want a loudspeaker that does not merely cope with a few watts, but flourishes on them. That clarity of purpose is what makes this new loudspeaker system from Wiener Lautsprecher Manufaktur GmbH particularly compelling: high efficiency, a large AMT tweeter, low crossover point, generous radiating area, solid wood construction and an optional fullrange extension. This is not a loudspeaker for casual rationalisation. It is an instrument for listeners whose relationship with music forms part of their personal culture.

Technical Data