I'm talking about the multiple inputs and channels which manufacturers of amps used to include as standard on most amps, and which feature is practically unknown these days on modern amps- apart from expensive reissues of old classic amps like Voxes, Marshalls and Fenders etc..
Even the smallest lowest power amps had at least two inputs, larger ones often had two channels with three or four inputs(luxury!!) and Voxes had THREE channels (SIX inputs!!! Plug the whole group in, guitars, bass, microphones etc!!)
The ultimate modern indulgence IMHO were/are amps like some modern Marshalls, Boogies etc, which had/have three or four separate channels which could be preset for tone changes etc...BUT ONLY HAVE ONE BLOODY INPUT!!!
You need at least two amps to even have a jam with your mate these days...
Sorry, I'm getting old and grumpy again...mumble, mumble...
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