last guy i had come over i lost his contact info,told me a channel was out on superrare marantz ecotec ,i sold it broke anyway though..bought for 100 sold way cheap for 900,an that included the preamp... i seen just it later on ebay sc 7 or sm 7 and am 9 ecotec..made 800 real fast an shoulda done way better,i was just starting out on finding,an keeping an selling some of these,same with a sansui au20000..sold too cheap,but big money for us years ago in the beginning,an i have no clue why the model 20 klh has no sound except when you do the switches,but sure it lites up,an turntable works.,these are better sounding an warmer an richer than most stuff,so we shall see,i,ll hunt an find a right person i hope,an im 61 i know well how things cost ..last guy was 25 bucks an hour,an he moved away an had fixed a couple marantzes for me..i grew up listening to a model 20 with its 4 ohm speakers and till this day still one of favourites so warm an rich..the repair guy here in jackson doesnt answer my phone calls,and him or another one is reported to be real grouchy an should retire..he aint seen grouchy yet..lol,time will tell i guess.......i dont pay much for one that only lites up,an we have a few places in atlanta that can repair,but i need someone close i can talk to face to face an shipping to chicago..thats a laugh,this isatlanta,and im not made of money by no means,and i only drive dodges not chevy trucks,but thanx anyway,im over extended a little but will find a way..........i dont give electronics,vintage stuff to goodwill etc,have bought a few things there an repaired some simple things in the past though...