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Resistor question
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Old 13th April 2017, 12:36 PM   #1
Viper_user is offline Viper_user  Europe
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Default Resistor question

Hi!

If your power amp says min 8 ohm but you don't set it above half on the trim pot will that be ok with a 4 ohm speaker?

I mean isn't that trim pot a resistor?

Last edited by Viper_user; 13th April 2017 at 12:51 PM.
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Old 13th April 2017, 12:41 PM   #2
scottjoplin is offline scottjoplin  Wales
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No basically. The 8 ohms is the maximum load (lowest impedance) it can drive. What trim pot do you mean?
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Old 13th April 2017, 12:53 PM   #3
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Its the two ones on the front, but i guess your right, they are not at the last end of the wiring.
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Old 13th April 2017, 12:58 PM   #4
scottjoplin is offline scottjoplin  Wales
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That's right, they adjust the level of the input
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Old 13th April 2017, 01:28 PM   #5
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The measurement shows 7,4 ohm on the tweeters, i'm going to use the amp directly to them in an active system. May be a little risky?
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Old 13th April 2017, 01:35 PM   #6
scottjoplin is offline scottjoplin  Wales
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That's fine. You've measured the resistance which is often a little lower than the impedance. A couple of ohms lower is very unlikely to cause problems
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Old 13th April 2017, 03:02 PM   #7
VictoriaGuy is offline VictoriaGuy  Canada
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Resistor question
Quote:
Originally Posted by scottjoplin View Post
That's fine. You've measured the resistance which is often a little lower than the impedance. A couple of ohms lower is very unlikely to cause problems
I agree with ScottJoplin.

Also, the impedance of '8 ohm' speakers actually can be quite different at different frequencies, so I wouldn't worry too much about a bit of 'mismatch', especially if you are not driving your amplifier to its maximum output power...for most amp and speaker combinations.
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Old 13th April 2017, 03:14 PM   #8
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Ok, thank's guys!
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Old 21st April 2017, 10:34 AM   #9
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Well if the rating are min 8 ohm at 22w.
Will the amp manage 4 ohm at 11w outtake?

Anyone who have an idea?
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Old 21st April 2017, 11:01 AM   #10
Old'n'Cranky is offline Old'n'Cranky  Australia
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Wut ?
What is "outtake" ?
How about you give a bit more info.
What is the amp ?
What are it's specifications ?
What are you trying to do ?
What do you want to achieve ?
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