Есть Pioneer M-73. Нужен ли к нему в пару C-73, Существование мощника без предусилителя

Возможно будет интересно - вот, что "буржуи" делают, когда им в руки попадет сразу два m-73:

If you can find two units, bi wire and bi amp your speakers with the one unit driving the lows for both channels and the other unit driving the high for both channels. But have the unit that drives the highs at Class A and the unit that drives the low Class A/B. This way you will have one dedicated transformer working for each woofer for each channel, powerful and dynamic sound of Class A/B for lows and sweat and warm Class A sound for highs. This setup is simply a killer. You will have the full power of the amp at low end (arround 115Watt RMS at 8 Ohms at Class A/B), and the warmth of Class A at the high end without minding for the output drop since the 20 Watt RMS Class A that the M-73 has are more than enough for driving your mid & tweeter. And do not worry about input sensitivity, it is exactly the same for Class A & Class A/B operation so everything will sound at the right level...

Кстати, последнее предложение о том, что чувствительность в этих режимах у усилителя одинаковая.