I also have a stock radio, but I won't have it out of the car until summer when I install the aux plug modified CD one I bought on this site.
I've only used the cassette with a cassette adapter to play mp3s so I don't know if the motor is weak or anything, truth be told, I have no cassettes to try on it. It doesn't have an EQ though.
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===Always trying to find time to work on cars===
Louis Duet
Baldwin, Long Island, NY
Where driving hard is SOP.
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"Blue" <= '85 Fiero GT
Stock V6---Stock everything. Trying to keep it 'mostly' that way.
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"Boo" <= '81 Delorean DMC-12
The "DuetLorean"
VIN #5835
Stock PRV engine
Robertson Equipped
Neiland/Delman Engineered
Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"
[This message has been edited by Lou and Blue (edited 04-15-2014).]