RandomAVdood
New Member
Hi all, I have recently acquired a KR-4140 from ebay for pretty cheap, I have cleaned it up, installed new LED fuse lamps for the dial and tuner meter, and cleaned all of the controls with deoxit to prevent static. It works quite well and pushes my older Allegro speakers effortlessly however the sound seems a bit off. I replaced all four the transistors with NOS NEC 2SD155's which are what are supposed to be in this unit, the previous owner had mismatched transistors two of which that were General Electric branded for some reason, the other two original NECs. It sounds better now and it no longer sounds different between the right and left channels however I am getting around 180 mV on both the left and right speaker outputs. I tested with all tone controls zeroed, balance in the center, volume control at the minimum position. Is this normal? It doesn't seem to have the same low end oomph and warmth that my lower end KR-2120 did. The tuner also seems a little weak but I will address that later. I really would like to get this working to its full potential because I absolutely love how it looks. Thanks!