The Phase Linear 400 stereo power amplifier 4-PART OUTPUT TRANSISTOR LOT as pictured. They're four pulled PNP PL-909, genuine US-made ( by Motorola for Phase Linear ) in good condition ( one by one tested) . This item is intended for professional ( audio service techs / electronic backgrounded hobbyist only) and it is final ( NO RETURN or REFUND) please buy or bib accordingly . Thanks for looking