Re: Ohms and the affects on Amp heads..?

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Posted by Rob Perl on May 19, 2000 at 15:09:17:

In Reply to: Ohms and the affects on Amp heads..? posted by Brock on May 19, 2000 at 09:01:32:

: Hey all

: Had a question that I have to ask after reading some amp posts a few pages down the list here..... How do Ohms affect sounds on amps...someone said that with eden heads it would be better to hook up two cabs and draw 4 ohms out of both for a combined total of 8...can someone explain this to me? I know that an ohm is actually resistance to current in electrical terms but how does this affect sound....does this have anything with running your amp Mono or stereo? This bring me to another question..why would you want to split up your signal to stero if you're using a bass guitar? Stereo is like what would that do??? I need to know!! Do tell!!

: Thanks Bass brothers!

: Brock

Hey, Brock!

You're right about the Ohm rating of speakers. It is the AVERAGE impedance or effective resistance of the speaker. Most amplifiers are rated at 4 Ohms, but most speakers are 8 ohms - If you plug in an 8 ohm speaker, the added resistance will cut down the powere ny about 40%. BUT -If your amp has two speaker jacks, you can plug in two 8 ohm speakers, which will actually REDUCE the impedance to 4 ohms and give you full power.

As far as stereo, many players will Bi amp. It's not stereo, but usually used to separate the highs and lows and send each to a different speaker. It gives you a clearer sound, as you can bring out both the highs and lows. It's not to be confused with simply plugging two speakers into your amp, as above; your amp has two have two output channels and a crossover to do this.

I know - this is a complicated subject; hope I was able to shed some light on it.

Good luck,


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