Make a big step up to 1990's technology and get a CD head unit .

There's lots of student-budget units available that would work well with your set-up (new and used). You're losing a lot of non-distorted amplification range, frequency response and clarity with your current arrangement.

Plus; I could never get those durn things to work right in the old days when they were new.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)