Old Marantz receiver make popping and hissing sounds no matter what

It's fixable - get it to a shop that knows these things. Likely it's only doing it on one channel, and this in turn would most likely be a noisy transistor - they had a few problems with those, like 2SC458 and 2SC1213 and the like. Can also be caused by a bad coupling capacitor, or if it's making the static on both channels, could be an arcing power switch - although this would cause interference on nearby AM radios and cause the dial lights to flash and dim.

Mark Z.

I had an intermittent problem exactly like this on an old Wards receiver, problem turned out to be a bad mosfet transistor in the preamp section. Since mine was intermittent I was able to track it down with some freeze spray.

Model Number If the fault is input dependent. If the fault is volume control level dependent. If the fault is tone control dependent. Does it occur after a period of time, or immediately? Etc.

At

All answers are 'no' and it is in one channel. model number #4415

The 4415 sounds like one of their smaller quad units, some of which used rather unusual driver IC's. I don't remember the part number, but I've got a few in a parts drawer at work. Can't say if thhis goes in yours, or if this is your problem.

Mark Z.

Question 4 is not a yes or no answer, is it?

g. At

You are correct, and thanks for keeping me on the path...

I will find a an old 8-track receiver to power my speakers...

g. At

I will use a set of these made in China for computer speaker needs. However, I will miss my last receiver ( the Marantz four channel) that has survived with me ( I am 48).

g. At

I did not mention or really notice that it was one channel doing the noise. Since you pointed out that attention to detail helps if posting to this forum, I paid attention and realized it is one of the two channels bothering me. So I disconnected that speaker and the noise is gone (along with stereo sound).

Thanks for pointing out the obvious, I have computer sound without that terrible noise.

Thanks to everyone who replied, I realized that I could use one channel for now. I do not want to get into replacing parts for now.