![]() Though you may be tempted to go for the most powerful amp you can afford, you’ll usually do better by buying a more sensitive speaker. An ideal amp would double its output as impedance halves so, though most won’t achieve it, the closer it gets the better. How to combine stereo and surround sound in one AV systemĪ better insight into an amp’s muscularity is to compare its power output into 8ohms with that into 4ohms.However, the electronic load of a speaker is far more varied than a simple resistor, so we’d be careful about judging the strength of an amplifier simply by the 8-ohm power figure. The standard way to measure an amplifier’s output is by connecting it to an 8-ohm resistor and measuring the power before distortion becomes too high. ![]() The sensitivity of a speaker, meanwhile, is a measure of how loud a speaker will go for a given input (1 watt with the speaker measured from 1 metre away). Impedance is a measure of how difficult the speaker is for the amplifier to drive, with a lower figure meaning it's more demanding. The speaker/amp partnership not only comes down to an amplifier’s power output (how many watts it can deliver to each channel of a music signal) but also the speaker's impedance characteristics (measured in ohms) and sensitivity (dB). An amplifier’s partnership with stereo speakers is extremely important, and there are a few things worth considering to ensure they complement each other as well as Wensleydale cheese and wheat crackers.Įver scratched your head when faced with specs such as '75W into 8 ohms'? Allow us to explain.
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