King RO4Y MKIII with FA.253

The SEAS King RO4Y MKIII speaker is our most advanced build to date. Designed by Håvard Sollien of the SEAS design team, this active 3-way speaker features 3 different amplifier presets allowing you to tailor different frequency responses for each preset. With Hypex ncore amplification and Analog Devices DSP correction, the King RO4Y MKIII will present the music to you and nothing extra. Featuring a 10 inch aluminum cone SEAS Extreme subwoofer and 180mm SEAS Excel Coaxial Aluminum/Magnesium midrange and 25mm tweeter. Our most impressive build yet to date. The sealed cabinet provides a smooth and detailed low-end that can hit the bottom of the frequency spectrum thanks to the long-throw capability of the subwoofer. The amplification is handled with 3 channels of Hypex’s renowned ncore amplifier modules each with 15 biquads for DSP correction, you can tailor this speaker to your listening space.

SEAS Extreme 10 inch Aluminum Cone Subwoofer

• Extremely stiff and rigid aluminium cone gives tremendous bass precision. The cone and the long throw low loss rubber surround show no sign of the familiar cone edge resonance and distortion associated with soft cones.
• 4-layer, extremely long, high temperature voice coil wound on a glass fiber voice coil former gives a high power handling capacity.
• Cu-cap around the pole pieces reduce non linear and modulation distortion and increase overload margin.
• Extra large magnet system provides high efficiency and low Q.
• Extremely stiff and stable injection moulded metal basket keeps the critical components in perfect alignment. Large windows in the basket both above and below the spider reduce sound reflection, air flow noise and cavity resonance to a minimum.
• 4Ω voice coil

SEAS Excel 7 inch midrange / 1 inch tweeter Coaxial Highlights

• This driver features a low-mass, surface-treated aluminium/magnesium alloy cone which behaves like a piston throughout the audible frequency range, without any sign of midrange resonances.
• The coaxially mounted aluminium/magnesium alloy dome tweeter has a low resonance frequency, and integrates with the cone driver to form a point source.
• The cone profile has been carefully designed to optimally load the tweeter’s radiation. A completely new rubber surround reduces resonances and prevents surround break up in the midrange band. The surround’s small inverted roll, combined with a profile that follows the shape of the cone, results in almost total elimination of diffraction effects on the tweeter’s output.
• The powerful neodymium magnet system, with its small profile and optimal shape, results in high midrange sensitivity with minimal back wave reflections. Heavy copper rings mounted above and below the T-shaped pole piece reduce nonlinear and modulation distortion and increase overload margin. The crown-shaped copper tweeter support ring eliminates any resonance coming from the cavity between the tweeter body and midrange voice coil former.
• All of these features work together to provide a smooth and well behaved off-axis response throughout the entire operating range.

FA.253 Amplifier Highlights

• 32-bit AK4454 DAC chip
• 15 biquads per amplifier
• Three selectable presets for filters
• Source selection
• Signal detect
• Auto shutdown
• Clip protect
• Thermal protect
• Filter protection

Specifications