XM Veteran
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Hi:
I think that i can help you. I am now on my third car with XM Radio. I have both the tape adapter and the FM modulator kit.
My impression is that the casette tape adapter on the Sony model (highly recommended, as with a home kit you can plug it into your stereo/hifi at home by simply pulling it in/out of the cradles-one in car one at home) does the best job for great stereo sound.
I had the FM modulator in the Saab but the distortion associated with triple signal conversion (mpeg digital satellite to analog stereo, then the stereo to FM, then the FM to analog again) makes this a poor option IMHO.
Oh, BTW, don't put the antenna on the hood unless you have a hatchback (hard to reach), instead just put it under the rear window velcro strapped or else the VANDALS will get the better of it. Trust me, this XM signal is strong enough for me to get reception in the middle of the living room at home.
Your recessed casette player should accept the tape adapter that comes with the Sony kit.
BTW did you notice that Alpine, Pioneer, Sony, and Blaupunkt went with XM as opposed to Sirius where Jennsen provides the equip? When was the last time that Jennsen made anything but Chinese labor camp eye candy for the lower echelons? OOPS that was uppety

The Sony unit is Japanese original, built by free and motivated people.
Hope that this was helpful
BTW again i still have the FM modulator with the radio connector if you want it (but no other parts).
B