Having fitted the hidden speaker system in the 410 I was a little disappointed with the resulting audio. Having midrange in the rear and tweeters up front I expected the sound to move around a bit but it was worse than I thought it would be.
I have now fitted a 6" dual (stereo) voice coil speaker in place of the original roof speaker and fed it from the rear channel outputs of the radio. I am really pleased with the overall result.
The dual voice coil speaker on its own is limited in frequency response and very directional. Added to the other speakers everything works well together and makes the effort of installing it worthwhile.
As the dual voice coil speaker is deeper than the original I had to fit a 12mm spacer to the roof speaker. This will be veneered to match when the dashboard is re finished. The black bump in front of the roof speaker is the microphone for hands free telephone.
I have added pictures of a tweeter in the dashboard ash tray and one of the speakers under the rear seat with its stainless steel grille.
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