Power – test review. Stereophile Magazine.

Please share this...
Share on FacebookTweet about this on TwitterShare on RedditDigg thisShare on LinkedInEmail this to someone

Power output of an Icon Audio MB150 valve amplifier reads 135W at a 1% distortion limit.

 

WHAT IT TELLS US

Power, measured in Watts, tells us how loud an amplifier can go. A 100 Watt amplifier goes louder than a 20 Watt amplifier for example. However, it does not go five times louder, much less in truth (+7dBW), and with a sensitive, modern floor standing loudspeaker 20 Watts will go very loud, loud enough for most homes. That’s because it gives +13dBW more power than 1 Watt and just 1 Watt gives 93dB at one metre from a stereo pair of 90dB sensitive floorstanders. That amounts to 106dB (93+13) sound pressure level at full output just 1m away which is extremely loud. In a room (i.e. reverberant field) this will decrease around -4dB for every doubling of distance, so expect 98dB at 4m (12ft) from the loudspeakers – and that is very loud. A 40 Watt amplifier adds 3dB to this and an 80 Watt amplifier 6dB, so suit less sensitive loudspeakers and bigger rooms

To continue reading please click HERE.

Please share this...
Share on FacebookTweet about this on TwitterShare on RedditDigg thisShare on LinkedInEmail this to someone