Ray circuits have changed hugely...and so has equipment. The digital age has made recording a whole new ball game. When a signal is amplified it also tends to add and amplify UNWANTED "noise" This is a huge problem. The whole point of having a good mic is to capture a sound accurately without distortion or unwanted noise. Now a great mic will not add anything to or take away any of the sound it picks up so distortion is cut...it has nothing to do with signal strength. So we have equipment now that will put a clean relatively noise free signal straight into a PC without the need for pre amps or signal boosters as all this and more can be done once in the PC. Obviously the more sophisticated the hardware and software equipment is the more it costs. Prices however have come way down and nowadays it is possible for folk to have home studio equipment at modest costs that would rival or surpass out of reach top pro equipment used a decade or two ago.