Want new car speakers and trying to keep the factory radio/deck... - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 2 Old 09-10-2019, 08:58 PM - Thread Starter
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Want new car speakers and trying to keep the factory radio/deck...

I am trying to find new car speakers for my car - and want to keep the original factory receiver/deck.

Since I want to keep the factory receiver - I should be looking for speakers with the lowest ohm rating and the highest sensitivity rating, correct?

So 2-ohms and 96 dB sensitivity...

Shopping List:
TV: LG C9/C10, or Samsung Q90R, or Sony ...
Blu-ray: Panasonic UB820, or Pioneer Elite LX500, or Sony X800M
AVR/Pre-pro: Marantz 8805/7705 or 8012, or Yamaha 5200 or 3080
Speakers: GE Triton One.R, or ML ElectroMotion ESL X
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post #2 of 2 Old 11-21-2019, 04:03 PM
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Not sure if you still need help with this but you want the lowest impedance that the factory deck can drive (if you don't know what that is then you should just use the same impedance as your stock speakers as the deck/amp is probably rated for that same impedance anyway). Higher sensitivity speakers will get you more output but assuming you aren't going with physically larger speakers (which are inherently more sensitive) then you're going to be sacrificing bass extension and/or total output capability (lower excursion and/or power handling) to get that sensitivity (one way to get it is to lighten the cone but then the cone might handle less power because cones have to stay stiff enough for the amount of force they are subject to, which rises with the output; another way is to lighten the voice coil but then you're lowering power handling and/or changing your T/S parameters in other ways).

By the way, keep in mind that sensitivity is typically rated at a wattage or a voltage. If a voltage, it's usually 2.83V. This is because 2.83V into 8 ohms gives 1 watt of power (2.83^2V/8Ω=1W; 2.83 is actually the approximate sqrt of 8). But if you've got a rating for 2.83v (or any other voltage), at 4 ohms it's 2.83^2/4Ω=2W and at 2 ohms it's 4 watts.

A 4-ohm speaker rated for sensitivity at 2.83V should have 3dB subtracted to turn it into a /1W rating and a 2-ohm rated at /2.83V should have 6dB subtracted to make it comparable.

The reason speakers are often rated at /2.83V is because it is far more useful when designing a crossover for a speaker system when it's rated that way.
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