Once upon a time on usenet Phil Allison wrote:
[snipped]
I recall seeing a Kenwood solid state receiver of late 60s vintage
that when connected to a Philips 8 inch low resonance woofer (
AD8065) slowly went into oscillation at about 3Hz.

I thought I recognised that number - or nearly. I've just checked my 'store
room' and found two AD8066 W4s. I could have sworn I had four of them, maybe
the other two are in boxes somewhere....

I seem to remember that they are good drivers - I must have kept them for a
reason. The surrounds are still nice and supple and they seem to be in good
condition.
--
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)