The ultimate statement

Grand Dewstar represents the pinnacle of Seawave Acoustic’s five decades of relentless innovation. Comprising a 4-way, 6-driver array featuring Scanning woofers, carbon fibre midrange, and diamond tweeter, it delivers a frequency response from 15 Hz to 40 kHz with 96 dB sensitivity and, in a typical reference environment, has virtually unlimited headroom.

At over two metres tall and weighing 410 kg, the Grand Dewstar’s monumental AC4C aluminium modular unicast cabinet provides absolute control over resonance and vibration, creating a background of total silence from which music emerges with breathtaking purity.

Designed as our ultimate statement loudspeaker, the Grand Dewstar embodies everything we have learned in our pursuit of acoustic perfection. We invite you to hear it for yourself and discover what can be achieved when engineering ambition meets uncompromising execution.

Technology

AC4C Aluminium Mould

To reproduce the low frequencies that Seawave Acoustic is renowned for, we experimented with a wide range of compounds. After testing exotic compounds such as Kevlar, we eventually chose AC4C aluminium which is extraordinarily inert. Working closely and tirelessly with our partners we managed to achieve the impossible, creating both the external cabinet and integrated chambers for their respective drive units.

What we have produced is an extremely inert speaker cabinet that allows us to fully realise the bass potential from our componentry while presenting an aesthetically beautiful form. Comprising of an infinite baffle configurations for the mid and tweeter with individual port reflex enclosures for the mid-bass and bass sections, the Dewstar AC4C unicast cabinet is an expression of our highest ambitions.

Non-Soldering Technology (NST)

Every electrical connection point within the Dewstar is made using our proprietary non-solder methodology (NST). Solder is lead-based and therefore impedes an electrical signal, causing a drop in the voltage which negatively affects the sound. And so, we twist and press together the connections using our specially formulated method, sealing them to create a long-lasting, high performance electrical pathway. The result: an increase in the transparency of the loudspeaker and an enhanced sense of dynamic expression.

Harmonic integrity, too, is also improved. Seawave Acoustic’s NST demonstrates the lengths we go to minimise any loss in performance of the original electrical signal that ultimately defines the speaker’s acoustic output.

Specially Produced Resistors

While developing the Dewstar, which uses our NST method to eliminate lead solder, we realised that our third-party components also relied upon lead solder. To ensure the highest quality signal path and we resolved to produce our own resistor thus eliminating altogether the need for solder. Using silver adhesive to bind the connections, we have managed to create a resistor that matches the performance level required by our designs.

Nickel Core Inductors

Normal Air Coil inductors can be an obstacle in the signal path because of the length of the conductor used to produce the values required for crossovers. Seeing these limitations, Seawave has developed hand-made inductors from specially-constructed nickel cores and 12AWG 6N copper coil foil, insulated with DuPont PTFE film. The result is a much shorter inductor length and a dramatic decrease in resistive value. This produces a level of bass performance never before heard in a speaker as compact as the Dewstar.

Insulators

To eliminate any vibration from the environment being transferred to the speaker, Seawave Acoustic has designed HDMT insulators to separate the specially constructed AC4C alloy stands from the Dewstar itself.

This technology was developed for use in particle accelerators and not only insulates and separates the cabinet from the floor, but also eliminates any other acoustic energy discharged into the room.