What Hi-Fi (UK) - - Feature -

When you find a ma­te­rial as ide­ally suited to speaker driv­ers as C-CA., you’ll want to use it ev­ery­where. And that’s why the most dis­tinc­tive fea­ture of many .on­i­tor Au­dio speak­ers is the (old Dome tweeter.

Now 30 years old, it was .on­i­tor Au­dio’s first use of C-CA., a ma­te­rial formed by putting an alu­minium/mag­ne­sium al­loy through an in­tri­cate strength­en­ing process. Sur­face de­for­ma­tions and molec­u­lar weak­nesses are re­moved, and once the al­loy cone is formed, a layer of pure ce­ramic alu­mina is ap­plied to its sur­faces in a high-tem­per­a­ture an­odic coat­ing process.

The re­sult is Ce­ramic-coated Alu­minium/.ag­ne­sium – C-CA. – a ma­te­rial that combines ex­treme rigid­ity with ex­cep­tional lightness. -it­tle won­der it was de­vel­oped by the aerospace in­dus­try for Ket en­gine com­po­nents. .on­i­tor Au­dio re­alised it was the per­fect choice for build­ing driv­ers that could ex­press ev­ery mu­si­cal de­tail with­out bend­ing un­der the stress of ex­treme use.

The look of the (old Dome comes from the C-CA. ma­te­rial be­ing gold-an­odised to a spe­cific thick­ness for stiff­ness and damp­ing char­ac­ter­is­tics. It’s as dis­tinc­tive now as it was in 198 , and in its lat­est it­er­a­tion is dis­tor­tion-free be­yond 3 k)[ – which makes it more than up to the task of hi-res au­dio play­back.

Thirty years later, we’ve seen a string of Award-win­ning speak­ers that utilise the (old Dome tweeter and other C-CA. drive units. It’s all tes­ta­ment to Kust how right .on­i­tor Au­dio was about the ma­te­rial.

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