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Can I conect 4 ohm loudspeakers to 8 ohm output of my tube amp as the sound is better?
Wiki User
∙ 12y ago
No.
An amplifier designed for an 8 ohm load works best with an 8 ohm load. You can connect a 4 ohm load to it, but the current rating curve of the amplifier will not match the voltage rating curve, and will will not achieve rated power. Attempting to achieve rated power will result in damage to the amplifier.
Look at this mathematically...
If the amplifier is rated 100 watts into 8 ohms, then it can produce 28 volts doing so. It will also produce 3.5 amperes at that power. So, when we say the amplifier is rated 100 watts into 8 ohms, we mean that the amplifier is rated 28 volts or 3.5 amperes, whichever comes first.
Connect a 4 ohm load to this amplifier, and 3.5 amperes will induce 14 volts and 50 watts. You cannot get 100 watts because that would require 5 amperes and 20 volts, and the amplifier cannot produce 5 amperes.
Wiki User
∙ 12y ago
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