8ohms vs. 4ohms

scorpionldr · Posted: Tue Nov 11, 2003 12:56 pm Post subject:

lol, i have a solution. get a 15 inch extension cabinet, or even an 18. you won't be able to make it fart anymore #Egg

gibson_thunder · Posted: Tue Nov 11, 2003 1:09 pm Post subject:

betcha I could... *lightning flash & puff of smoke* "BY THE POWER OF GIBSON, I COMMAND YOU TO FART, O 18" EXTENTION CAB!!!" see? Laughing

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CaptainSaveAHo · Bear Cub Joined: 10 Jan 2003 Posts: 647

You, my friend, are not touching any of my equipment!

And you know, that's not a bad idea. The usual advice people give is to scrap the whole system and start over. GAS problems. It's a $300 combo, adding an extension may just be the perfect solution ^_^.

3rdfret · Not So Newbie Joined: 13 Nov 2003 Posts: 5

If the amp states it can handle 4-8 ohms then it is ok to hook up a 4ohm speaker load to it...yes you usually get twice as much power into 4 ohms as into 8 ohms but the amp will run hotter...very hot if you crank it up for
long periods of time.Getting twice as much power will NOT give you twice as much volume though as we humans have logarithmic hearing.
That means we need 10 times the power to hear it as twice as loud..so 200 watts into 4 ohms is not going to be much louder than 100 watts into 8 ohms.Also trying to wring the last ounce of power out of a solid state amp is looking for trouble as the power supply voltages remain the same regardless of the load and as the output voltage approaches the power supply voltage you get nasty clipping of the sound..if the output voltage reaches the power voltage then you get a flatline dc current that burns the speaker coil...Do not overdrive solid-state amps!..you will burn out the speakers or cause the output transisitors to die from heat exhaustion.
A valve amp is better because you can overdrive it if you choose and not damage it or the speakers plus they give better low end response than solid state. A 100 watt valve amp gives as much useable power as a 200 watt solid state amp.
Anyone interested in amp technology can be entertained at
http://www.lenardaudio.com

Rufio · Posted: Thu Nov 13, 2003 12:29 pm Post subject:

Should I get an 8 ohm cab incase I ever get another cab to go with it?
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CaptainSaveAHo · Bear Cub Joined: 10 Jan 2003 Posts: 647

Good info 3rd! Yeah, adding another cab is another 2db per woofer or something isn't it?

That's a good idea Ruf, thinking ahead! Unless you buy an 8x10 stack and a few hundred watts to start with. Then there's really nowhere to upgrade too Very Happy

. Or even a half stack for most people ^_^!

Rufio · Posted: Thu Nov 13, 2003 6:27 pm Post subject:

Well that cab I want is 1000 watts Very Happy

I'd still like to put another on though.
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