Amplifier transistors designed by American inventor Scott hi-fi in 1949 and the first tuner digital.Fabriqué 1976 to 1979.Bonne qualité.Tout walk despite the age .2 X 42 W RMS into 8 Ohms.Très good tone and definition . preamp and amp séparés.Réglages effective and good puissance.Il are also two entries micro.Vintage worth the price argus coup.En hand is a mystery because I've seen for sale of € 104.00 to 300.00 €!