I sure doubt anyone is reading this anymore, but just some historical record, since most of the history recited here is typical web mishmash, conflated junk, misleading and worse. ADC was once a Ct company, yes, way back when, Milford, I think, cartridges, and maybe a US-designed equalizer. It was the latter that got the attention of BSR. They were bought. BSR also bought dbx in Newton MA, an indy chiefly pro audio company full of actual US EEs. Soon the two brands were joined, sort of, and ADC Ct ceased to exist. The brand became the bargain Asian OEM arm. And many many many equalizers, all good, quiet, crude, but usable. Nothing to do with Canada, ever; that was a different company, maybe telecom as someone said. And nothing ever to do with NAD; a later line of ADC brand product tried to emulated NAD appearance, this after dbx had exploded and was being sold off piecemeal (consumer ASP, consumer high end, consumer extremely cool and accomplished speakers including at the very end an ADC-branded model, converters, US stereo TV, pro RTA, pro parts, pro EQ/compressors, etc. etc.). Before dbx died, a good-quality ADC line had been introduced including the Asia-sourced B200 configurable power amp and mated products, hoping to ride some cred from the phenomenal dbx BX1 out of Newton and its mated products. After dbx finally died and the second NAD-lookalike line trod water, the ADC B200 was rebadged BX2 and later there even was a metered and fanned (external) BX3. Anyway, B200 and dbx BX2 were okay amps, not at the NAD level really and not remotely like the BX1, but whatever. They work for the most part (relays need replacing sometimes) and I am still using my B200. I worked as editor/writer in dbx engineering 1982-1988.