8 ohm speakers!!!

[ajoliver2010]

Im use to be a coaxial man but as of recently ive been trying raw drivers just for kicks. I ordered a pair of audiopipe speakers with the sealed back (8 ohms) and these babies scream! At first i had them bridged on my 4 channel amp (400x2 @4 ohms), but i didnt like the mono output it was putting out. It sounded real distorted at higher volumes. So eralier today i just wired them as if they were 4 ohm speakers and gave them their own channel. The output is now stereo and sounds 10x better. Wish i would have done this sooner. Cant wait for the tweeters to come in!

[16MustangVet]

because lower ohms handle mono better?

[J57ltr]

so what what are the other 2 channels driving? Basically the higher the impedance your damping factor is higher and the THD is less as well. Basically those values drop in half every time you drop the impedance by half. With higher impedances the sound quality will be better.

Jeff

[I800C0LLECT]

Here ya go...you'll have to sort through it a bit but it hits on speaker sensitivity.

http://www.diymobileaudio.com/forum/...m-drivers.html


Here's the bread and butter:

Remember, most speakers are rated at 2.83V. A 4 ohm Speaker rated for 90db spl at 2.83v is really being rated at 2 watts! Whereas an 8 ohm Speaker rated for 90db spl at 2.83v is only being rated at 1 watt. You can do the math for yourself, Power = Voltage^2 / resistance. At 2 watts, we can assume that same 8 ohm speaker is actually rated at 93db spl (remember, every doubling of power gives you a theoretical 3db gain in spl). So using that 8 ohm speaker will give you the same amount of output, at half the power required as a 4 ohm speaker. Your amps run cooler and draw less power from your vehicle's charging system, your speakers run cooler, and everyone is happy!

[J57ltr]

You really have to read the specs for the speakers. In my day everything was 1 watt@ 1meter so it didn't matter that they used 2.83 as the standard and dropped the voltage by half to measure a 4 ohm speaker to also have 1 watt. They must have started this garbage when they started rating amps at their 2ohm power instead of 4 ohm power.

Jeff

[ajoliver2010]

The other two channels are left alone for now until the tweeters arrive. And I've read that post about speaker sensitivity a few times. Good info

[I800C0LLECT]

Nice... Keep us posted on how it turns out. I'm a big fan of these threads