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SEAS KingRO4Y MK.III Application Note & Assembly Guide
Contents
System Outline
The KingRO4Y MK.III is a compact three-way loudspeaker kit, making use of two SEAS drive units- the
C18EN002/A
and
L26RO4Y
. The amplification and DSP crossover networking are handled by the
powerful Hypex Fusion FA503, a 3-channel plate amplifier boasting two 500W channels and a 100W
tweeter channel.
Drivers:
is an 18cm coaxial unit from the Excel range, a mid-frequency cone with a tweeter
centred in its voice coil, the co-location of the mid drive unit and tweeter allows for co-location in
time improving phase coherence and reducing effects such as vertical lobing which can occur with
non-co-located units. Handily, housing mid and tweeter in the same basket also allows for a tidily
compact and unobtrusive cabinet in terms of the given output. Both the tweeter dome and
midrange membrane are made of an aluminium/magnesium alloy and the shape of the midrange’s
cone is specifically designed to optimally load the tweeters radiation.
is a 26cm low frequency drive unit from the SEAS Extreme range. Having a large
magnet system for the size of driver it has exceptionally low Q which makes it ideal for use in
compact systems with digital crossovers, such as utilised in the Fusion FA503 as part of this kit. A
four-layer, high temperature voice coil means high power handling capacity and reduced thermal
compression further waiting to take advantage of the improved output power of the FA503.
