Sous13 Posted May 4, 2008 Report Share Posted May 4, 2008 I would like to put a new stereo MP3 CD player in to my TR4a. I dont want to buy one only to find it wont fit. To avoid taking out the current stereo can anyone tell me of any compatibility issues relating to putting in a new stereo. Are they still the same size or do you need special brackets etc. Thanks Sous Quote Link to post Share on other sites
knapman Posted May 4, 2008 Report Share Posted May 4, 2008 Hi Sous A modern stereo needs a Letterbox shaped slot IE full size of unit, the original 4A slot was small oblong & 2 holes for volume/tuning knobs unless its been altered, which most have. I have a period radio in the original slot (unwired) & fitted a modern stereo in the glove box which can't be seen when the lid is shut. Make a hardboard cutout too fit in glovebox & cover with vinyl then cut out slot for sterio feed wires though hole cut in rear of glovebox, job done. Bob K Quote Link to post Share on other sites
ianhoward Posted May 4, 2008 Report Share Posted May 4, 2008 The other thing to remember is that TR4's were positive earth - not sure when they changed from dynamo to alternator and hence +ve to -ve earth... Perhaps it was with the intoduction of the TR4A? If you have +ve earth, it is relatively easy to change polarity and hence have the ease of fitting 'modern' extras as desired. All radios/CD players are of course -ve earth with 'DIN' mountings.... Brgds Quote Link to post Share on other sites
knapman Posted May 4, 2008 Report Share Posted May 4, 2008 Ian's right what he say's. My 4A was +ve earth & i converted it to -ve earth, but not all 4As where +ve earth there was a change over point but it was not documented hence a lot of posts discussing it. Make sure you wire it correctly or your nice new stereo will fry! Bob K Quote Link to post Share on other sites
Sous13 Posted May 4, 2008 Author Report Share Posted May 4, 2008 Ian's right what he say's.My 4A was +ve earth & i converted it to -ve earth, but not all 4As where +ve earth there was a change over point but it was not documented hence a lot of posts discussing it. Make sure you wire it correctly or your nice new stereo will fry! Bob K OK thanks very much guys. I will check in to +ve / -ve. The stereo in there is a tape player probably from 80's so Im guessing its already OK but will check. Quote Link to post Share on other sites
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