I've been thinking about those once-common but now dying or dead features from old HiFis. (I know, I have no life).
Amps with fluorescent peak meters;
Mono switches on amps;
Hi-Blend switches on amps or tuners (bit like a mono switch but only affected frequencies from around 5kHz+);
MPX switches (tuner, amp or cassette deck);
Crystal cartridge inputs on amps (even MM/MC inputs are now dying; have been for 20 years);
HiFi cassette decks with 1/4" microphone inputs! (Assuming you can actually find a new HiFi cassette deck);
CD players with a display showing index numbers, and controls on the player/remote to skip indexes;
Tape monitor switches on amps (still around, but dying, I'd say);
Muting buttons on amps (typically sliced 10 or 20db or so off the volume for more precise control at low levels);
Amps with switchable multiple speaker outlets (not surround!);
Turntables with strobe-markings round the rim of the platter;
Consumer-grade turntables with linear-tracking arms;
Turntables with 16RPM! (Yes I know you can still buy TT's which do 78);
Feel free to add your own reminiscing
Amps with fluorescent peak meters;
Mono switches on amps;
Hi-Blend switches on amps or tuners (bit like a mono switch but only affected frequencies from around 5kHz+);
MPX switches (tuner, amp or cassette deck);
Crystal cartridge inputs on amps (even MM/MC inputs are now dying; have been for 20 years);
HiFi cassette decks with 1/4" microphone inputs! (Assuming you can actually find a new HiFi cassette deck);
CD players with a display showing index numbers, and controls on the player/remote to skip indexes;
Tape monitor switches on amps (still around, but dying, I'd say);
Muting buttons on amps (typically sliced 10 or 20db or so off the volume for more precise control at low levels);
Amps with switchable multiple speaker outlets (not surround!);
Turntables with strobe-markings round the rim of the platter;
Consumer-grade turntables with linear-tracking arms;
Turntables with 16RPM! (Yes I know you can still buy TT's which do 78);
Feel free to add your own reminiscing