(18-02-2021, 01:57 PM)AdrianPH Wrote: The CV5377 is the last Mil version of the EF91 that I can find and are still cheap to buy at £3 each, they seem to have less of a lightbulb moment with the heaters when power is applied.
Adrian
Hi Adrian, super job.
Heater flash as it is called by the audiophool community is seen as something desirable instilling some kind of magically audible improvements to the sound quality. Fortunately the likes of the EF91 have been largely ignored so far.
