Power amps

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Member Since: Dec 10, 2004

I was just wondering how you know , how much ohms are 'in' your amp , 'cuz there always talking about 800 Watts at 4 ohms ( for example ) ???

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Administrator
Since: Apr 03, 2002


Dec 14, 2004 01:37 pm

Ohms is resistence, ohms are not "in" the amp, they are in the path to to the speakers, and you amp is built to handle certain amounts.

So, depending on the amount of resistence your speakers and cabling have the output from the amp that actually gets thru varies. Most amps are designed to work with 4 to 8 ohms of resistence, going over or under this number can burn out your amp. Some work with 2, but it's not as common.

Jack of all trades master of ___
Member
Since: May 28, 2004


Dec 14, 2004 01:40 pm

My amp runs 7.879345 ohms

Member
Since: Dec 10, 2004


Dec 14, 2004 01:45 pm

ok , I understand that but how do I find how much resistance the cables offer ???

Administrator
Since: Apr 03, 2002


Dec 14, 2004 01:47 pm

The vast majority of any resistence is in the speakers themselves, assuming you are using even a moderately decent cable. Worry about the speakers.

Czar of Midi
Administrator
Since: Apr 04, 2002


Dec 20, 2004 08:37 pm

If you want to find out how much resistance a cable has you will need an Ohm meter. Then you simply hook one lead to one end of the cable and the other lead to the other end and read the resistnace. This will tell you how much resistance is in the cable.

Cheaper cables will usuall have higher resistance.

Chief Cook and Bottle Washer
Member
Since: May 10, 2002


Dec 20, 2004 11:33 pm

My amp used to have 8 ohms per side but one fell out. Now one side is louder than the other. Wish I could find it. Bet the cat ate it.

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