These are great sounding speakers in the custom MORPH fiberglass housings.
Big 6.1/2" 2-way full-range speakers with vacuum-formed poly woofers and poly semi-dome tweeters. These will fill the 914's cockpit with musical entertainment that will overcome those loud carb intakes or loud mufflers
They handle 150 watts peak, 50 watts RMS, 4 Ω impedence
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Click to view attachment
$100. + shipping
... or can be picked up locally - LAX South Bay area