Originally Posted by tomwil
For some reason, I thought tape heads could be magnetized. I guess from the older days when they used to sell tape head demagnetizers for cassette decks.
Good to know!
Yeah I remember the audio head demagnetizers back in the day. I think the theory was that if you had a three-head deck (erase-rec-play) that over time the playback head would accumulate tiny magnetic tape particles. In my opinion this could only happen with three-head decks and only to the playback head as the erase and record heads should degauss themselves when in rec mode. As to VCRs they don’t have dedicated “play” heads. -2 flying rec/play SP, -2 flying rec/play EP, -1 flying erase, -2 flying rec/play HF, 1 stationary erase, 1 stationary rec/play audio/ct. All those heads should degauss themselves when in rec mode. All above info is only my opinion as I remember it.
All that said, even an unshielded speaker magnet in a consumer center speaker near any tape deck will not magnetize any heads, not even dedicated playback heads in a cassette deck. That’s my opinion. Now as for the weight of the speaker on top of that deck? Hmmm that IMO could be damaging to any moving parts, alignment or heat dispersing issues…